Spring Boot学习笔记（1）

约定不等于承诺〃 2022-09-09 09:27 154阅读 0赞

### 文章目录 ###

*   *  Spring Boot学习笔记（1）
     *   *  Spring Boot 整合 JSP
         *  Spring Boot HTML
         *  Thymeleaf 常用语法
         *  Spring Boot 数据校验
         *  Spring Boot 整合 JDBC
         *  Spring Boot 整合 MyBatis
         *  Spring Boot整合Spring Data JPA
         *  SpringBoot整合mongodb
         *  Spring Boot 整合 Redis
         *   *  Redis
             *  启动 Redis 服务
             *  Spring Boot 整合 Redis
             *  Redis 5 种数据类型
         *  Spring Boot 整合 Spring Security
         *   *  权限管理
         *  Spring Boot 整合Shiro
         *   *  Shiro 核心组件

## Spring Boot学习笔记（1） ##

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Spring Boot 是一个快速开发框架，可以迅速搭建出一套基于 Spring 框架体系的应用，是 Spring Cloud 的基础。

Spring Boot 开启了各种自动装配，从而简化代码的开发，不需要编写各种配置文件，只需要引入相关依赖就可以迅速搭建一个应用。

*  特点

1、不需要 web.xml

2、不需要 springmvc.xml

3、不需要 tomcat，Spring Boot 内嵌了 tomcat

4、不需要配置 JSON 解析，支持 REST 架构

5、个性化配置非常简单

*  如何使用

1、创建 Maven 工程，导入相关依赖。

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.7.RELEASE</version>
    </parent>
    
    <dependencies>
      
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
      
      <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.6</version>
        <scope>provided</scope>
      </dependency>
    </dependencies>

2、创建 Student 实体类

package com.southwind.entity;
    
    import lombok.Data;
    
    @Data
    public class Student { 
        private long id;
        private String name;
        private int age;
    }

3、StudentRepository

package com.southwind.repository;
    
    import com.southwind.entity.Student;
    
    import java.util.Collection;
    
    public interface StudentRepository { 
        public Collection<Student> findAll();
        public Student findById(long id);
        public void saveOrUpdate(Student student);
        public void deleteById(long id);
    }

4、StudentRepositoryImpl

package com.southwind.repository.impl;
    
    import com.southwind.entity.Student;
    import com.southwind.repository.StudentRepository;
    import org.springframework.stereotype.Repository;
    
    import java.util.Collection;
    import java.util.HashMap;
    import java.util.Map;
    
    @Repository
    public class StudentRepositoryImpl implements StudentRepository { 
    
        private static Map<Long,Student> studentMap;
    
        static{ 
            studentMap = new HashMap<>();
            studentMap.put(1L,new Student(1L,"张三",22));
            studentMap.put(2L,new Student(2L,"李四",23));
            studentMap.put(3L,new Student(3L,"王五",24));
        }
    
        @Override
        public Collection<Student> findAll() { 
            return studentMap.values();
        }
    
        @Override
        public Student findById(long id) { 
            return studentMap.get(id);
        }
    
        @Override
        public void saveOrUpdate(Student student) { 
            studentMap.put(student.getId(),student);
        }
    
        @Override
        public void deleteById(long id) { 
            studentMap.remove(id);
        }
    }

5、StudentHandler

package com.southwind.controller;
    
    import com.southwind.entity.Student;
    import com.southwind.repository.StudentRepository;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.*;
    
    import java.util.Collection;
    
    @RestController
    @RequestMapping("/student")
    public class StudentHandler { 
    
        @Autowired
        private StudentRepository studentRepository;
    
        @GetMapping("/findAll")
        public Collection<Student> findAll(){ 
            return studentRepository.findAll();
        }
    
        @GetMapping("/findById/{id}")
        public Student findById(@PathVariable("id") long id){ 
            return studentRepository.findById(id);
        }
    
        @PostMapping("/save")
        public void save(@RequestBody Student student){ 
            studentRepository.saveOrUpdate(student);
        }
    
        @PutMapping("/update")
        public void update(@RequestBody Student student){ 
            studentRepository.saveOrUpdate(student);
        }
    
        @DeleteMapping("/deleteById/{id}")
        public void deleteById(@PathVariable("id") long id){ 
            studentRepository.deleteById(id);
        }
    }

6、application.yml

server:
      port: 9090

7、启动类

package com.southwind;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    @SpringBootApplication
    public class Application { 
        public static void main(String[] args) { 
            SpringApplication.run(Application.class,args);
        }
    }

`@SpringBootApplication` 表示当前类是 Spring Boot 的入口，Application 类的存放位置必须是其他相关业务类的存放位置的父级。

### Spring Boot 整合 JSP ###

*  pom.xml

<parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>2.0.7.RELEASE</version>
    </parent>
    
    <dependencies>
      
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
    
      
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
      </dependency>
      <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
      </dependency>
    
      
      <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
      </dependency>
    
      <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.6</version>
        <scope>provided</scope>
      </dependency>
    </dependencies>

*  创建配置文件 application.yml

server:
      port: 8181
    spring:
      mvc:
        view:
          prefix: /
          suffix: .jsp

*  创建 Handler

package com.southwind.controller;
    
    import com.southwind.entity.Student;
    import com.southwind.repository.StudentRepository;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.servlet.ModelAndView;
    
    @Controller
    @RequestMapping("/hello")
    public class HelloHandler { 
    
        @Autowired
        private StudentRepository studentRepository;
    
        @GetMapping("/index")
        public ModelAndView index(){ 
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.setViewName("index");
            modelAndView.addObject("list",studentRepository.findAll());
            return modelAndView;
        }
    
        @GetMapping("/deleteById/{id}")
        public String deleteById(@PathVariable("id") long id){ 
            studentRepository.deleteById(id);
            return "redirect:/hello/index";
        }
    
        @PostMapping("/save")
        public String save(Student student){ 
            studentRepository.saveOrUpdate(student);
            return "redirect:/hello/index";
        }
    
        @PostMapping("/update")
        public String update(Student student){ 
            studentRepository.saveOrUpdate(student);
            return "redirect:/hello/index";
        }
    
        @GetMapping("/findById/{id}")
        public ModelAndView findById(@PathVariable("id") long id){ 
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.setViewName("update");
            modelAndView.addObject("student",studentRepository.findById(id));
            return modelAndView;
        }
    }

*  JSP

<%--
      Created by IntelliJ IDEA.
      User: southwind
      Date: 2019-03-21
      Time: 12:02
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <%@ page isELIgnored="false" %>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
        <h1>学生信息</h1>
        <table>
            <tr>
                <th>学生编号</th>
                <th>学生姓名</th>
                <th>学生年龄</th>
                <th>操作</th>
            </tr>
            <c:forEach items="${list}" var="student">
                <tr>
                    <td>${student.id}</td>
                    <td>${student.name}</td>
                    <td>${student.age}</td>
                    <td>
                        <a href="/hello/findById/${student.id}">修改</a>
                        <a href="/hello/deleteById/${student.id}">删除</a>
                    </td>
                </tr>
            </c:forEach>
        </table>
        <a href="/save.jsp">添加学生</a>
    </body>
    </html>

<%--
      Created by IntelliJ IDEA.
      User: southwind
      Date: 2019-03-21
      Time: 12:09
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
        <form action="/hello/save" method="post">
            ID:<input type="text" name="id"/><br/>
            name:<input type="text" name="name"/><br/>
            age:<input type="text" name="age"/><br/>
            <input type="submit" value="提交"/>
        </form>
    </body>
    </html>

<%--
      Created by IntelliJ IDEA.
      User: southwind
      Date: 2019-03-21
      Time: 12:09
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
        <form action="/hello/update" method="post">
            ID:<input type="text" name="id" value="${student.id}" readonly/><br/>
            name:<input type="text" name="name" value="${student.name}"/><br/>
            age:<input type="text" name="age" value="${student.age}"/><br/>
            <input type="submit" value="提交"/>
        </form>
    </body>
    </html>

### Spring Boot HTML ###

Spring Boot 可以结合 Thymeleaf 模版来整合 HTML，使用原生的 HTML 作为视图。

`Thymeleaf` 模版是面向 Web 和独立环境的 Java 模版引擎，能够处理 HTML、XML、JavaScript、CSS 等。  
![在这里插入图片描述][e6a7f82e0ede4531ab158c8b5ca283fc.png]  
static文件夹下资源可直接访问，templates下则需要配置映射。

*  pom.xml

<parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>2.0.7.RELEASE</version>
    </parent>
    
    <dependencies>
      
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
    
      <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.6</version>
        <scope>provided</scope>
      </dependency>
    
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
      </dependency>
    </dependencies>

*  appliction.yml

server:
      port: 9090
    spring:
      thymeleaf:
        prefix: classpath:/templates/
        suffix: .html
        mode: HTML5
        encoding: UTF-8

*  Handler

package com.southwind.controller;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    @Controller
    @RequestMapping("/index")
    public class IndexHandler { 
    
        @GetMapping("/index")
        public String index(){ 
            System.out.println("index...");
            return "index";
        }
    }

*  HTML

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        <h1>Hello World</h1>
    </body>
    </html>

![在这里插入图片描述][37bfa515c5a546c1987f19cda7f76159.png]

如果希望客户端可以直接访问 HTML 资源，将这些资源放置在 `static` 路径下即可，否则必须通过 Handler 的后台映射才可以访问静态资源。

### Thymeleaf 常用语法 ###

*  **赋值、拼接**

@GetMapping("/index2")
    public String index2(Map<String,String> map){ 
      map.put("name","张三");
      return "index";
    }

*  **条件判断：if/unless**

th:if 表示条件成立时显示内容，th:unless 表示条件不成立时显示内容

@GetMapping("/if")
    public String index3(Map<String,Boolean> map){ 
        map.put("flag",true);
        return "index";
    }

*  **循环**

@GetMapping("/index")
    public String index(Model model){ 
        System.out.println("index...");
        List<Student> list = new ArrayList<>();
        list.add(new Student(1L,"张三",22));
        list.add(new Student(2L,"李四",23));
        list.add(new Student(3L,"王五",24));
        model.addAttribute("list",list);
        return "index";
    }

<table>
      <tr>
        <th>index</th>
        <th>count</th>
        <th>学生ID</th>
        <th>学生姓名</th>
        <th>学生年龄</th>
      </tr>
      <tr th:each="student,stat:${list}" th:style="'background-color:'+@{${stat.odd}?'#F2F2F2'}">
        <td th:text="${stat.index}"></td>
        <td th:text="${stat.count}"></td>
        <td th:text="${student.id}"></td>
        <td th:text="${student.name}"></td>
        <td th:text="${student.age}"></td>
      </tr>
    </table>

stat 是状态变量，属性：

*  `index` 集合中元素的index（从0开始）
 *  `count` 集合中元素的count（从1开始）
 *  `size` 集合的大小
 *  `current` 当前迭代变量
 *  `even/odd` 当前迭代是否为偶数/奇数（从0开始计算）
 *  `first` 当前迭代的元素是否是第一个
 *  `last` 当前迭代的元素是否是最后一个
 *

*  **URL**

Thymeleaf 对于 URL 的处理是通过 `@{...}` 进行处理，结合 th:href 、th:src

<h1>Hello World</h1>
    <a th:href="@{http://www.baidu.com}">跳转</a>
    <a th:href="@{http://localhost:9090/index/url/{na}(na=${name})}">跳转2</a>
    <img th:src="${src}">
    <div th:style="'background:url('+ @{${src}} +');'">
    	<br/>
    	<br/>
    	<br/>
    </div>

*  **三元运算**

@GetMapping("/eq")
    public String eq(Model model){ 
        model.addAttribute("age",30);
        return "test";
    }

*  `gt` great than 大于
 *  `ge` great equal 大于等于
 *  `eq` equal 等于
 *  `lt` less than 小于
 *  `le` less equal 小于等于
 *  `ne` not equal 不等于
 *

*  **switch**

@GetMapping("/switch")
    public String switchTest(Model model){ 
        model.addAttribute("gender","女");
        return "test";
    }

*  **基本对象**
    
     *  `#ctx` ：上下文对象
     *  `#vars`：上下文变量
     *  `#locale`：区域对象
     *  `#request`：HttpServletRequest 对象
     *  `#response`：HttpServletResponse 对象
     *  `#session`：HttpSession 对象
     *  `#servletContext`：ServletContext 对象

@GetMapping("/object")
    public String object(HttpServletRequest request){ 
        request.setAttribute("request","request对象");
        request.getSession().setAttribute("session","session对象");
        return "test";
    }

*  **内嵌对象**

可以直接通过 `#` 访问。

1、`dates`：java.util.Date 的功能方法

2、`calendars`：java.util.Calendar 的功能方法

3、`numbers`：格式化数字

4、`strings`：java.lang.String 的功能方法

5、`objects`：Object 的功能方法

6、`bools`：对布尔求值的方法

7、`arrays`：操作数组的功能方法

8、`lists`：操作集合的功能方法

9、`sets`：操作集合的功能方法

10、`maps`：操作集合的功能方法

@GetMapping("/util")
    public String util(Model model){ 
        model.addAttribute("name","zhangsan");
        model.addAttribute("users",new ArrayList<>());
        model.addAttribute("count",22);
        model.addAttribute("date",new Date());
        return "test";
    }

<p th:text="${#dates.format(date,'yyyy-MM-dd HH:mm:sss')}"></p>
    
    <p th:text="${#dates.createToday()}"></p>
    
    <p th:text="${#dates.createNow()}"></p>
    
    <p th:text="${#strings.isEmpty(name)}"></p>
    
    <p th:text="${#lists.isEmpty(users)}"></p>
    
    <p th:text="${#strings.length(name)}"></p>
    
    <p th:text="${#strings.concat(name,name,name)}"></p>
    
    <p th:text="${#strings.randomAlphanumeric(count)}"></p>

### Spring Boot 数据校验 ###

package com.southwind.entity;
    
    import lombok.Data;
    import org.hibernate.validator.constraints.Length;
    
    import javax.validation.constraints.Min;
    import javax.validation.constraints.NotEmpty;
    import javax.validation.constraints.NotNull;
    
    @Data
    public class User { 
        @NotNull(message = "id不能为空")
        private Long id;
        @NotEmpty(message = "姓名不能为空")
        @Length(min = 2,message = "姓名长度不能小于2位")
        private String name;
        @Min(value = 16,message = "年龄必须大于16岁")
        private int age;
    }

@GetMapping("/validator")
    public void validatorUser(@Valid User user,BindingResult bindingResult){ 
      System.out.println(user);
      if(bindingResult.hasErrors()){ 
        List<ObjectError> list = bindingResult.getAllErrors();
        for(ObjectError objectError:list){ 
          System.out.println(objectError.getCode()+"-"+objectError.getDefaultMessage());
        }
      }
    }

### Spring Boot 整合 JDBC ###

*  pom.xml

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.11</version>
    </dependency>

*  application.yml

server:
      port: 9090
    spring:
      thymeleaf:
        prefix: classpath:/templates/
        suffix: .html
        mode: HTML5
        encoding: UTF-8
      datasource:
        url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
        username: root
        password: root
        driver-class-name: com.mysql.cj.jdbc.Driver

*  User

package com.southwind.entity;
    
    import lombok.Data;
    import org.hibernate.validator.constraints.Length;
    
    import javax.validation.constraints.Min;
    import javax.validation.constraints.NotEmpty;
    import javax.validation.constraints.NotNull;
    
    @Data
    public class User { 
        @NotNull(message = "id不能为空")
        private Long id;
        @NotEmpty(message = "姓名不能为空")
        @Length(min = 2,message = "姓名长度不能小于2位")
        private String name;
        @Min(value = 60,message = "成绩必须大于60分")
        private double score;
    }

*  UserRepository

package com.southwind.repository;
    
    import com.southwind.entity.User;
    
    import java.util.List;
    
    public interface UserRepository { 
        public List<User> findAll();
        public User findById(long id);
        public void save(User user);
        public void update(User user);
        public void deleteById(long id);
    }

*  UserRepositoryImpl

package com.southwind.repository.impl;
    
    import com.southwind.entity.User;
    import com.southwind.repository.UserRepository;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.jdbc.core.BeanPropertyRowMapper;
    import org.springframework.jdbc.core.JdbcTemplate;
    import org.springframework.stereotype.Repository;
    
    import java.util.List;
    
    @Repository
    public class UserRepositoryImpl implements UserRepository { 
    
        @Autowired
        private JdbcTemplate jdbcTemplate;
    
        @Override
        public List<User> findAll() { 
            return jdbcTemplate.query("select * from user",new BeanPropertyRowMapper<>(User.class));
        }
    
        @Override
        public User findById(long id) { 
            return jdbcTemplate.queryForObject("select * from user where id = ?",new Object[]{ id},new BeanPropertyRowMapper<>(User.class));
        }
    
        @Override
        public void save(User user) { 
            jdbcTemplate.update("insert into user(name,score) values(?,?)",user.getName(),user.getScore());
        }
    
        @Override
        public void update(User user) { 
            jdbcTemplate.update("update user set name = ?,score = ? where id = ?",user.getName(),user.getScore(),user.getId());
        }
    
        @Override
        public void deleteById(long id) { 
            jdbcTemplate.update("delete from user where id = ?",id);
        }
    }

*  Handler

package com.southwind.controller;
    
    import com.southwind.entity.User;
    import com.southwind.repository.UserRepository;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.*;
    
    import java.util.List;
    
    @RestController
    @RequestMapping("/user")
    public class UserHandler { 
    
        @Autowired
        private UserRepository userRepository;
    
        @GetMapping("/findAll")
        public List<User> findAll(){ 
            return userRepository.findAll();
        }
    
        @GetMapping("/findById/{id}")
        public User findById(@PathVariable("id") long id){ 
            return userRepository.findById(id);
        }
    
        @PostMapping("/save")
        public void save(@RequestBody User user){ 
            userRepository.save(user);
        }
    
        @PutMapping("/update")
        public void update(@RequestBody User user){ 
            userRepository.update(user);
        }
    
        @DeleteMapping("/deleteById/{id}")
        public void deleteById(@PathVariable("id") long id){ 
            userRepository.deleteById(id);
        }
    }

### Spring Boot 整合 MyBatis ###

*  pom.xml

<dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>1.3.1</version>
    </dependency>

*  application.yml

*  UserRepository

package com.southwind.mapper;
    
    import com.southwind.entity.User;
    
    import java.util.List;
    
    public interface UserRepository { 
        public List<User> findAll(int index,int limit);
        public User findById(long id);
        public void save(User user);
        public void update(User user);
        public void deleteById(long id);
        public int count();
    }

*  UserRepository.xml

<?xml version="1.0" encoding="UTF-8" ?>
            <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.southwind.mapper.UserRepository">
    
        <select id="findAll" resultType="User">
            select * from user limit #{param1},#{param2}
        </select>
    
        <select id="count" resultType="int">
            select count(id) from user
        </select>
    
        <select id="findById" parameterType="long" resultType="User">
            select * from user where id = #{id}
        </select>
    
        <insert id="save" parameterType="User">
            insert into user(name,score) values(#{name},#{score})
        </insert>
    
        <update id="update" parameterType="User">
            update user set name = #{name},score = #{score} where id = #{id}
        </update>
    
        <delete id="deleteById" parameterType="long">
            delete from user where id = #{id}
        </delete>
    </mapper>

*  User

package com.southwind.entity;
    
    import lombok.Data;
    import org.hibernate.validator.constraints.Length;
    
    import javax.validation.constraints.Min;
    import javax.validation.constraints.NotEmpty;
    import javax.validation.constraints.NotNull;
    
    @Data
    public class User { 
        @NotNull(message = "id不能为空")
        private Long id;
        @NotEmpty(message = "姓名不能为空")
        @Length(min = 2,message = "姓名长度不能小于2位")
        private String name;
        @Min(value = 60,message = "成绩必须大于60分")
        private double score;
    }

*  Handler

package com.southwind.controller;
    import com.southwind.entity.User;
    import com.southwind.mapper.UserRepository;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.*;
    import org.springframework.web.servlet.ModelAndView;
    
    @Controller
    @RequestMapping("/mapper")
    public class UserMapperHandler { 
    
        @Autowired
        private UserRepository userRepository;
        private int limit = 10;
    
        @GetMapping("/findAll/{page}")
        public ModelAndView findAll(@PathVariable("page") int page){ 
            ModelAndView modelAndView = new ModelAndView();
            int index = (page-1)*limit;
            modelAndView.setViewName("show");
            modelAndView.addObject("list",userRepository.findAll(index,limit));
            modelAndView.addObject("page",page);
            //计算总页数
            int count = userRepository.count();
            int pages = 0;
            if(count%limit == 0){ 
                pages = count/limit;
            }else{ 
                pages = count/limit+1;
            }
            modelAndView.addObject("pages",pages);
            return modelAndView;
        }
    
        @GetMapping("/deleteById/{id}")
        public String deleteById(@PathVariable("id") long id){ 
            userRepository.deleteById(id);
            return "redirect:/mapper/findAll/1";
        }
    
        @GetMapping("/findById")
        public ModelAndView findById(@RequestParam("id") long id){ 
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.addObject("user",userRepository.findById(id));
            modelAndView.setViewName("update");
            return modelAndView;
        }
    
        @PostMapping("/update")
        public String update(@RequestBody User user){ 
            userRepository.update(user);
            return "redirect:/mapper/findAll/1";
        }
    
        @PostMapping("/save")
        public String save(@RequestBody User user){ 
            userRepository.save(user);
            return "redirect:/mapper/findAll/1";
        }
    
        @GetMapping("/redirect/{name}")
        public String redirect(@PathVariable("name") String name){ 
            return name;
        }
    }

*  HTML

<!DOCTYPE html>
    <html xmlns:th="http://www.thymeleaf.org">
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        <form action="/mapper/save" method="post">
            用户姓名：<input type="text" name="name" /><br/>
            用户成绩：<input type="text" name="score" /><br/>
            <input type="submit" value="提交"/>
        </form>
    </body>
    </html>

<!DOCTYPE html>
    <html xmlns:th="http://www.thymeleaf.org">
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
        <form action="/mapper/update" method="post">
            用户ID：<input type="text" name="id" th:value="${user.id}" readonly/><br/>
            用户姓名：<input type="text" name="name" th:value="${user.name}" /><br/>
            用户成绩：<input type="text" name="score" th:value="${user.score}" /><br/>
            <input type="submit" value="提交"/>
        </form>
    </body>
    </html>

<!DOCTYPE html>
    <html xmlns:th="http://www.thymeleaf.org">
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <script type="text/javascript" th:src="@{/jquery-3.3.1.min.js}"></script>
        <script type="text/javascript"> $(function(){ $("#first").click(function(){ var page = $("#page").text(); page = parseInt(page); if(page == 1){ return false; } window.location.href="/mapper/findAll/1"; }); $("#previous").click(function(){ var page = $("#page").text(); page = parseInt(page); if(page == 1){ return false; } page = page-1; window.location.href="/mapper/findAll/"+page; }); $("#next").click(function(){ var page = $("#page").text(); var pages = $("#pages").text(); if(page == pages){ return false; } page = parseInt(page); page = page+1; window.location.href="/mapper/findAll/"+page; }); $("#last").click(function(){ var page = $("#page").text(); var pages = $("#pages").text(); if(page == pages){ return false; } window.location.href="/mapper/findAll/"+pages; }); }); </script>
    </head>
    <body>
        <h1>用户信息</h1>
        <table>
            <tr>
                <th>用户ID</th>
                <th>用户名</th>
                <th>成绩</th>
                <th>操作</th>
            </tr>
            <tr th:each="user:${list}">
                <td th:text="${user.id}"></td>
                <td th:text="${user.name}"></td>
                <td th:text="${user.score}"></td>
                <td>
                    <a th:href="@{/mapper/deleteById/{id}(id=${user.id})}">删除</a>
                    <a th:href="@{/mapper/findById(id=${user.id})}">修改</a>
                </td>
            </tr>
        </table>
        <a id="first" href="javascript:void(0)">首页</a>
        <a id="previous" href="javascript:void(0)">上一页</a>
        <span id="page" th:text="${page}"></span>/<span id="pages" th:text="${pages}"></span>
        <a id="next" href="javascript:void(0)">下一页</a>
        <a id="last" href="javascript:void(0)">尾页</a><br/>
        <a href="/mapper/redirect/save">添加用户</a>
    </body>
    </html>

### Spring Boot整合Spring Data JPA ###

JPA Hibernate框架就是一个JPA的实现。  
Spring Data JPA 不是对JPA规范的具体实现，本身是一个抽象层。

1、pom.xml - 导入相关的依赖

<dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-jpa</artifactId>
            </dependency>
    
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>8.0.15</version>
            </dependency>
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
            </dependency>
        </dependencies>

2、创建Student实体类：

package com.southwind.entity;
    
    import lombok.Data;
    
    import javax.persistence.*;
    import java.util.Date;
    
    @Data
    @Entity
    public class Student { 
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        private Long id;
        @Column
        private String name;
        @Column
        private Double score;
        @Column
        private Date birthday;
    }

3、创建StudentRepository接口：

package com.southwind.repository;
    
    import com.southwind.entity.Student;
    import org.springframework.data.jpa.repository.JpaRepository;
    
    import java.util.List;
    
    public interface StudentRepository extends JpaRepository<Student,Long> { 
    	public Student getById(Long id);
    }

4、创建StudentHandler，注入StudentRepository：

package com.southwind.controller;
    
    import com.southwind.entity.Student;
    import com.southwind.repository.StudentRepository;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.*;
    
    import java.util.List;
    
    @RestController
    public class StudentHandler { 
        @Autowired
        private StudentRepository studentRepository;
    
        @GetMapping("/findAll")
        public List<Student> findAll(){ 
            return studentRepository.findAll();
        }
    
        @GetMapping("/findById/{id}")
        public Student get(@PathVariable("id") Long id){ 
            return studentRepository.findById(id).get();
        }
    
        @PostMapping("/save")
        public Student save(@RequestBody Student student){ 
            return studentRepository.save(student);
        }
    
        @PutMapping("/update")
        public Student update(@RequestBody Student student){ 
            return studentRepository.save(student);
        }
    
        @DeleteMapping("/deleteById/{id}")
        public void deleteById(@PathVariable("id") Long id){ 
            studentRepository.deleteById(id);
        }
    
    }

5、application.yml

spring:
      datasource:
        url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
        username: root
        password: root
        driver-class-name: com.mysql.cj.jdbc.Driver
      jpa:
        show-sql: true            #输出SQL
        properties:
          hibernate:
            format_sql: true      #格式化SQL

6、创建启动类：

### SpringBoot整合mongodb ###

`BSON`类似于JSON的一种数据格式

1、创建Maven工程，pom.xml

<dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-mongodb</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
            </dependency>
        </dependencies>

2、创建实体类

package com.southwind.entity;
    
    import lombok.Data;
    import org.springframework.data.annotation.Id;
    import org.springframework.data.mongodb.core.mapping.Document;
    import org.springframework.data.mongodb.core.mapping.Field;
    
    @Document(collection = "my_student")
    @Data
    public class Student { 
        @Id
        private String id;
        @Field(value = "student_age")
        private int age;
        @Field(value = "student_name")
        private String name;
    }

3、创建StudentRepository接口，于Spring Data JPA一样，只需要定义不需要实现。

package com.southwind.repository;
    
    import com.southwind.entity.Student;
    import org.springframework.data.mongodb.repository.MongoRepository;
    import org.springframework.stereotype.Repository;
    
    @Repository
    public interface StudentRepository extends MongoRepository<Student,String>{ 
    	public Student getById(String id);
    }

4、创建StudentHandler

package com.southwind.controller;
    
    import com.southwind.entity.Student;
    import com.southwind.repository.StudentRepository;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.*;
    
    import java.util.List;
    
    @RestController
    public class StudentHandler { 
        @Autowired
        private StudentRepository studentReposity;
    
        @GetMapping("/findAll")
        public List<Student> findAll(){ 
            return studentReposity.findAll();
        }
    
        @GetMapping("/findById/{id}")
        public Student findById(@PathVariable("id") String id){ 
            return studentReposity.findById(id).get();
        }
    
        @PostMapping("/save")
        public Student save(@RequestBody Student student){ 
            return studentReposity.save(student);
        }
    
        @PutMapping("/update")
        public Student update(@RequestBody Student student){ 
            return studentReposity.save(student);
        }
    
        @DeleteMapping("/deleteById/{id}")
        public void deleteById(@PathVariable("id") String id){ 
            studentReposity.deleteById(id);
        }
    }

5、application.yml

spring:
      data:
        mongodb:
          database: my_test
          host: 127.0.0.1
          port: 12345

6、创建启动类

### Spring Boot 整合 Redis ###

#### Redis ####

基于内存进⾏存储，⽀持 key-value 的存储形式，底层是⽤ C 语⾔编写的。  
基于 key-value 形式的数据字典，结构⾮常简单，没有数据表的概念，直接⽤键值对的形式完成数据的  
管理，Redis ⽀持 5 种数据类型：

*  字符串
 *  列表
 *  集合
 *  有序集合
 *  哈希

安装 Redis  
1、下载 Redis [https://redis.io/download][https_redis.io_download]  
![在这里插入图片描述][a16400642da3439aac4678ae8fa68dba.png]  
2、解压，并在本地硬盘任意位置创建⽂件夹，在其中创建 3 个⼦⽂件夹，把相应目录解压的文件放在里面去

*  bin：放置启动 Redis 的可执⾏⽂件
 *  db：放置数据⽂件
 *  etc：放置配置⽂件，设置 Redis 服务的端⼝、⽇志⽂件位置、数据⽂件位置…

#### 启动 Redis 服务 ####

1、进⼊ redis ⽬录，启动 redis-server。

sudo ./bin/redis-server ./etc/redis.conf

2、进⼊ redis ⽬录，启动 redis-cli，启动 Redis 的客户端管理窗⼝，在此窗⼝中即可操作 Redis 数据  
库。

./bin/redis-cli

3、对数据进⾏操作。

set key value
    get key

4、关闭 Redis 服务。

shutdown

5、退出客户端，control+c。

#### Spring Boot 整合 Redis ####

Spring Data Redis 操作 Redis。  
1、创建 Maven ⼯程。

<parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
     <version>2.1.5.RELEASE</version>
    </parent>
    <dependencies>
     <dependency>
    	 <groupId>org.springframework.boot</groupId>
    	 <artifactId>spring-boot-starter-web</artifactId>
    	 </dependency>
     <dependency>
    	 <groupId>org.springframework.boot</groupId>
    	 <artifactId>spring-boot-starter-data-redis</artifactId>
     </dependency>
     <dependency>
    	 <groupId>org.apache.commons</groupId>
    	 <artifactId>commons-pool2</artifactId>
     </dependency>
     <dependency>
    	 <groupId>org.projectlombok</groupId>
    	 <artifactId>lombok</artifactId>
     </dependency>
    </dependencies>

2、创建实体类，实现序列化接⼝，否则⽆法存⼊ Redis 数据库。

package com.southwind.entity;
    import lombok.Data;
    import java.io.Serializable;
    import java.util.Date;
    @Data
    public class Student implements Serializable {   //实现Serializable接口
     private Integer id;
     private String name;
     private Double score;
     private Date birthday;
    }

3、创建控制器。

package com.southwind.controller;
    import com.southwind.entity.Student;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.web.bind.annotation.*;
    @RestController
    public class StudentHandler { 
     @Autowired
     private RedisTemplate redisTemplate;
     
     @PostMapping("/set")
     public void set(@RequestBody Student student){ 
     	redisTemplate.opsForValue().set("student",student);
     }
     
     @GetMapping("/get/{key}")
     public Student get(@PathVariable("key") String key){ 
     	return (Student) redisTemplate.opsForValue().get(key);
     }
     
     @DeleteMapping("/delete/{key}")
     public boolean delete(@PathVariable("key") String key){ 
    	 redisTemplate.delete(key);
    	 return redisTemplate.hasKey(key);
     }
    }

4、创建配置⽂件 application.yml

spring:
     redis:
     	database: 0
     	host: localhost
     	port: 6379

5、创建启动类

package com.southwind;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    @SpringBootApplication
    public class Application { 
     public static void main(String[] args) { 
     	SpringApplication.run(Application.class,args);
     }
    }

#### Redis 5 种数据类型 ####

字符串

@GetMapping("/string")
    public String stringTest(){ 
     redisTemplate.opsForValue().set("str","Hello World");
     String str = (String) redisTemplate.opsForValue().get("str");
     return str;
    }

列表

@GetMapping("/list")
    public List<String> listTest(){ 
     ListOperations<String,String> listOperations = redisTemplate.opsForList();
     listOperations.leftPush("list","Hello");
     listOperations.leftPush("list","World");
     listOperations.leftPush("list","Java");
     List<String> list = listOperations.range("list",0,2);
     return list;
    }

集合

@GetMapping("/set")
    public Set<String> setTest(){ 
     SetOperations<String,String> setOperations = redisTemplate.opsForSet();
     setOperations.add("set","Hello");
     setOperations.add("set","Hello");
     setOperations.add("set","World");
     setOperations.add("set","World");
     setOperations.add("set","Java");
     setOperations.add("set","Java");
     Set<String> set = setOperations.members("set");  //实际存进去只有三个
     return set;
    }

有序集合

@GetMapping("/zset")
    public Set<String> zsetTest(){ 
     ZSetOperations<String,String> zSetOperations = redisTemplate.opsForZSet();
     zSetOperations.add("zset","Hello",1);
     zSetOperations.add("zset","World",2);
     zSetOperations.add("zset","Java",3);  //有序的存储
     Set<String> set = zSetOperations.range("zset",0,2);
     return set;
    }

哈希  
**HashMap** `key` `value`  
**HashOperations** `key` `hashkey` `value`  
**key 是每⼀组数据的 ID，hashkey 和 value 是⼀组完整的 HashMap 数据，通过 key 来区分不同的  
HashMap。**

HashMap hashMap1 = new HashMap();
    hashMap1.put(key1,value1);
    HashMap hashMap2 = new HashMap();
    hashMap2.put(key2,value2);
    HashMap hashMap3 = new HashMap();
    hashMap3.put(key3,value3);
    
    HashOperations<String,String,String> hashOperations = redisTemplate.opsForHash();
    hashOperations.put(hashMap1,key1,value1);
    hashOperations.put(hashMap2,key2,value2);
    hashOperations.put(hashMap3,key3,value3);

![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAbW9ua2V5aGxq_size_20_color_FFFFFF_t_70_g_se_x_16 4]

@GetMapping("/hash")
    public Set<String> zsetTest(){ 
     HashOperations<String,String,String> hashOperations = redisTemplate.opsForHash();
     hashOperations.put("key","hashkey","value");
     return hashOperations.get("key");
    }

### Spring Boot 整合 Spring Security ###

Shiro、Spring Security  
1、创建 Maven ⼯程，pom.xml

<parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-parent</artifactId>
     <version>2.1.5.RELEASE</version>
    </parent>
    <dependencies>
    	 <dependency>
    		 <groupId>org.springframework.boot</groupId>
    		 <artifactId>spring-boot-starter-web</artifactId>
    	 </dependency>
    	 <dependency>
    		 <groupId>org.springframework.boot</groupId>
    		 <artifactId>spring-boot-starter-thymeleaf</artifactId>
    	 </dependency>
    	 <dependency>
    		 <groupId>org.springframework.boot</groupId>
    		 <artifactId>spring-boot-starter-security</artifactId>
    	 </dependency>
    </dependencies>

2、创建 Handler

3、创建 HTML

<!DOCTYPE html>
    <html lang="en">
    <head>
     <meta charset="UTF-8">
     <title>Title</title>
    </head>
    	<body>
    	 <h1>Hello World</h1>
    	</body>
    </html>

4、创建 application.yml

spring:
     thymeleaf:
    	 prefix: classpath:/templates/
    	 suffix: .html

5、创建启动类 Application

package com.southwind.controller;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    @SpringBootApplication
    public class Application { 
     public static void main(String[] args) { 
     SpringApplication.run(Application.class,args);
     }
    }

6、设置⾃定义密码

spring:
     thymeleaf:
    	 prefix: classpath:/templates/
    	 suffix: .html
     security:
    	 user:
    		 name: admin
    		 password: 123123

#### 权限管理 ####

定义两个 HTML 资源：index.html、admin.html，同时定义两个⻆⾊ ADMIN 和 USER，ADMIN 拥有  
访问 index.html 和 admin.html 的权限，USER 只有访问 index.html 的权限。  
7、创建 SecurityConfig 类：

package com.southwind.config;
    
    @Configuration
    @EnableWebSecurity
    public class SecurityConfig extends WebSecurityConfigurerAdapter { 
     @Override
     protected void configure(AuthenticationManagerBuilder auth) throws Exception { 
     	auth.inMemoryAuthentication().passwordEncoder(new MyPasswordEncoder())
     		.withUser("user").password(new MyPasswordEncoder().encode("000")).roles("USER")
     		.and()
     		.withUser("admin").password(new MyPasswordEncoder().encode("123")).roles("ADMIN","USER");
     }
     
     @Override
     protected void configure(HttpSecurity http) throws Exception { 
    	 http.authorizeRequests().antMatchers("/admin").hasRole("ADMIN")
    		 .antMatchers("/index").access("hasRole('ADMIN') or hasRole('USER')")
    		 .anyRequest().authenticated()
    		 .and()
    		 .formLogin()
    		 .loginPage("/login")
    		 .permitAll()
    		 .and()
    		 .logout()
    		 .permitAll()
    		 .and()
    		 .csrf()
    		 .disable();
     }
    }

8、修改 Handler

package com.southwind.controller;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;
    @Controller
    public class HelloHandler { 
     @GetMapping("/index")
     public String index(){ 
     	return "index";
     }
     @GetMapping("/admin")
     public String admin(){ 
     	return "admin";
     }
     @GetMapping("/login")
     public String login(){ 
     	return "login";
     }
    }

9、login.html

<!DOCTYPE html>
    <html xmlns:th="http://www.thymeleaf.org">
    <html lang="en">
    <head>
     <meta charset="UTF-8">
     <title>Title</title>
    </head>
    <body>
    	 <form th:action="@{/login}" method="post">
    		 ⽤户名：<input type="text" name="username"/><br/>
    		 密码：<input type="text" name="password"/><br/>
    		 <input type="submit" value="登录"/>
    	 </form>
     </body>
    </html>

10、index.html

<!DOCTYPE html>
    <html lang="en">
    <head>
     <meta charset="UTF-8">
     <title>Title</title>
    </head>
    <body>
     <h1>Hello World</h1>
     <form action="/logout" method="post">
     	<input type="submit" value="退出"/>
     </form>
    </body>
    </html>

11、admin.html

<!DOCTYPE html>
    <html lang="en">
    <head>
     <meta charset="UTF-8">
     <title>Title</title>
    </head>
    <body>
     <h1>后台管理系统</h1>
     <form action="/logout" method="post">
     	<input type="submit" value="退出"/>
     </form>
    </body>
    </html>

### Spring Boot 整合Shiro ###

什么是 Shiro

官网：http://shiro.apache.org/

是一款主流的 Java 安全框架，不依赖任何容器，可以运行在 Java SE 和 Java EE 项目中，它的主要作用是对访问系统的用户进行身份认证、授权、会话管理、加密等操作。

Shiro 就是用来解决安全管理的系统化框架。

#### Shiro 核心组件 ####

用户、角色、权限

会给角色赋予权限，给用户赋予角色

1、UsernamePasswordToken，Shiro 用来封装用户登录信息，使用用户的登录信息来创建令牌 Token。

2、SecurityManager，Shiro 的核心部分，负责安全认证和授权。

3、Suject，Shiro 的一个抽象概念，包含了用户信息。

4、Realm，开发者自定义的模块，根据项目的需求，验证和授权的逻辑全部写在 Realm 中。

5、AuthenticationInfo，用户的角色信息集合，认证时使用。

6、AuthorzationInfo，角色的权限信息集合，授权时使用。

7、DefaultWebSecurityManager，安全管理器，开发者自定义的 Realm 需要注入到 DefaultWebSecurityManager 进行管理才能生效。

8、ShiroFilterFactoryBean，过滤器工厂，Shiro 的基本运行机制是开发者定制规则，Shiro 去执行，具体的执行操作就是由 ShiroFilterFactoryBean 创建的一个个 Filter 对象来完成。

Shiro 的运行机制如下图所示：  
![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAbW9ua2V5aGxq_size_20_color_FFFFFF_t_70_g_se_x_16 5]  
1、创建 Spring Boot 应用，集成 Shiro 及相关组件，pom.xml

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>1.5.3</version>
        </dependency>
    
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.1.tmp</version>
        </dependency>
    
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

2、自定义 Shiro 过滤器

package com.southwind.realm;
    
    import com.southwind.entity.Account;
    import com.southwind.service.AccountService;
    import org.apache.shiro.SecurityUtils;
    import org.apache.shiro.authc.*;
    import org.apache.shiro.authz.AuthorizationInfo;
    import org.apache.shiro.authz.SimpleAuthorizationInfo;
    import org.apache.shiro.realm.AuthorizingRealm;
    import org.apache.shiro.subject.PrincipalCollection;
    import org.apache.shiro.subject.Subject;
    import org.springframework.beans.factory.annotation.Autowired;
    
    import java.util.HashSet;
    import java.util.Set;
    
    public class AccoutRealm extends AuthorizingRealm { 
    
        @Autowired
        private AccountService accountService;
    
        /** * 授权 * @param principalCollection * @return */
        @Override
        protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) { 
            //获取当前登录的用户信息
            Subject subject = SecurityUtils.getSubject();
            Account account = (Account) subject.getPrincipal();
    
            //设置角色
            Set<String> roles = new HashSet<>();
            roles.add(account.getRole());
            SimpleAuthorizationInfo info = new SimpleAuthorizationInfo(roles);
    
            //设置权限
            info.addStringPermission(account.getPerms());
            return info;
        }
    
    
        /** * 认证 * @param authenticationToken * @return * @throws AuthenticationException */
        @Override
        protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException { 
            UsernamePasswordToken token = (UsernamePasswordToken) authenticationToken;
            Account account = accountService.findByUsername(token.getUsername());
            if(account != null){ 
                return new SimpleAuthenticationInfo(account,account.getPassword(),getName());
            }
            return null;
        }
    }

3、配置类

package com.southwind.config;
    
    import at.pollux.thymeleaf.shiro.dialect.ShiroDialect;
    import com.southwind.realm.AccoutRealm;
    import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
    import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
    import org.springframework.beans.factory.annotation.Qualifier;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    import java.util.Hashtable;
    import java.util.Map;
    
    @Configuration
    public class ShiroConfig { 
    
        @Bean
        public ShiroFilterFactoryBean shiroFilterFactoryBean(@Qualifier("securityManager") DefaultWebSecurityManager securityManager){ 
            ShiroFilterFactoryBean factoryBean = new ShiroFilterFactoryBean();
            factoryBean.setSecurityManager(securityManager);
            //权限设置
            Map<String,String> map = new Hashtable<>();
            map.put("/main","authc");
            map.put("/manage","perms[manage]");
            map.put("/administrator","roles[administrator]");
            factoryBean.setFilterChainDefinitionMap(map);
            //设置登录页面
            factoryBean.setLoginUrl("/login");
            //设置未授权页面
            factoryBean.setUnauthorizedUrl("/unauth");
            return factoryBean;
        }
    
    
        @Bean
        public DefaultWebSecurityManager securityManager(@Qualifier("accoutRealm") AccoutRealm accoutRealm){ 
            DefaultWebSecurityManager manager = new DefaultWebSecurityManager();
            manager.setRealm(accoutRealm);
            return manager;
        }
    
        @Bean
        public AccoutRealm accoutRealm(){ 
            return new AccoutRealm();
        }
    
        @Bean
        public ShiroDialect shiroDialect(){ 
            return new ShiroDialect();
        }
    }

编写认证和授权规则：

> 认证过滤器

`anon`：无需认证。

`authc`：必须认证。

`authcBasic`：需要通过 HTTPBasic 认证。

`user`：不一定通过认证，只要曾经被 Shiro 记录即可，比如：记住我。

> 授权过滤器

`perms`：必须拥有某个权限才能访问。

`role`：必须拥有某个角色才能访问。

`port`：请求的端口必须是指定值才可以。

`rest`：请求必须基于 RESTful，POST、PUT、GET、DELETE。

`ssl`：必须是安全的 URL 请求，协议 HTTPS。

> 练习

创建 3 个页面，main.html、manage.html、administrator.html

访问权限如下：

1、必须登录才能访问 main.html

2、当前用户必须拥有 manage 授权才能访问 manage.html

3、当前用户必须拥有 administrator 角色才能访问 administrator.html

**Controller:**

package com.southwind.controller;
    
    import com.southwind.entity.Account;
    import org.apache.shiro.SecurityUtils;
    import org.apache.shiro.authc.*;
    import org.apache.shiro.subject.Subject;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    @Controller
    public class AccountController { 
    
        @GetMapping("/{url}")
        public String redirect(@PathVariable("url") String url){ 
            return url;
        }
    
        @PostMapping("/login")
        public String login(String username, String password, Model model){ 
            Subject subject = SecurityUtils.getSubject();
            UsernamePasswordToken token = new UsernamePasswordToken(username,password);
            try { 
                subject.login(token);
                Account account = (Account) subject.getPrincipal();
                subject.getSession().setAttribute("account",account);
                return "index";
            } catch (UnknownAccountException e) { 
                e.printStackTrace();
                model.addAttribute("msg","用户名错误！");
                return "login";
            } catch (IncorrectCredentialsException e){ 
                model.addAttribute("msg","密码错误！");
                e.printStackTrace();
                return "login";
            }
        }
    
        @GetMapping("/unauth")
        @ResponseBody
        public String unauth(){ 
            return "未授权，无法访问！";
        }
    
        @GetMapping("/logout")
        public String logout(){ 
            Subject subject = SecurityUtils.getSubject();
            subject.logout();
            return "login";
        }
    }

> Shiro 整合 Thymeleaf

1、pom.xml 引入依赖

<dependency>
        <groupId>com.github.theborakompanioni</groupId>
        <artifactId>thymeleaf-extras-shiro</artifactId>
        <version>2.0.0</version>
    </dependency>

2、配置类添加 ShiroDialect

@Bean
    public ShiroDialect shiroDialect(){ 
        return new ShiroDialect();
    }

3、index.html

<!DOCTYPE html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org" xmlns:shiro="http://www.thymeleaf.org/thymeleaf-extras-shiro">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <link rel="shortcut icon" href="#"/>
    </head>
    <body>
        <h1>index</h1>
        <div th:if="${session.account != null}">
            <span th:text="${session.account.username}+'欢迎回来！'"></span><a href="/logout">退出</a>
        </div>
        <a href="/main">main</a> <br/>
        <div shiro:hasPermission="manage">
            <a href="manage">manage</a> <br/>
        </div>
        <div shiro:hasRole="administrator">
            <a href="/administrator">administrator</a>
        </div>
    </body>
    </html>

【代码来源】 [https://github.com/southwind9801/myspringclouddemo.git][https_github.com_southwind9801_myspringclouddemo.git]  
【参考】[楠哥教学视频][Link 1]  
【可参考（我自己跟着练习写的）】[https://github.com/monkeyhlj/spring-study][https_github.com_monkeyhlj_spring-study]

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAbW9ua2V5aGxq_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/1b3bd44b07934b5c90647f5d080b9bd1.png
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[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAbW9ua2V5aGxq_size_20_color_FFFFFF_t_70_g_se_x_16 2]: /images/20220829/a11449c5c87849769704cd553c98fc7a.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAbW9ua2V5aGxq_size_20_color_FFFFFF_t_70_g_se_x_16 3]: /images/20220829/c679bc6edf5d43dbbf942a4a4f5729e7.png
[e6a7f82e0ede4531ab158c8b5ca283fc.png]: /images/20220829/c457f6a93f6e45a780d9744d973fb187.png
[37bfa515c5a546c1987f19cda7f76159.png]: /images/20220829/7709e1fe676a459dbba7c2072f9ee572.png
[https_redis.io_download]: https://redis.io/download
[a16400642da3439aac4678ae8fa68dba.png]: /images/20220829/fad5de97bfad404a9e8f3f59306853ba.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAbW9ua2V5aGxq_size_20_color_FFFFFF_t_70_g_se_x_16 4]: /images/20220829/f06cd985d41940f3b01f86dd6a684570.png
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[https_github.com_southwind9801_myspringclouddemo.git]: https://github.com/southwind9801/myspringclouddemo.git
[Link 1]: https://www.bilibili.com/video/BV1v4411G72q
[https_github.com_monkeyhlj_spring-study]: https://github.com/monkeyhlj/spring-study