初次整合SSM框架

ゝ一纸荒年。 2022-09-02 14:57 69阅读 0赞

## 整合SSM ##

> 环境要求

环境：

*  IDEA
 *  MySQL 8.0.x
 *  Tomcat 9
 *  Maven 3.6

> 数据库环境

创建一个存放书籍数据的数据库表

CREATE DATABASE `ssmbuild`;
    
    USE `ssmbuild`;
    
    DROP TABLE IF EXISTS `books`;
    
    CREATE TABLE `books` (
    `bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
    `bookName` VARCHAR(100) NOT NULL COMMENT '书名',
    `bookCounts` INT(11) NOT NULL COMMENT '数量',
    `detail` VARCHAR(200) NOT NULL COMMENT '描述',
    KEY `bookID` (`bookID`)
    ) ENGINE=INNODB DEFAULT CHARSET=utf8
    
    INSERT  INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
    (1,'Java',1,'从入门到放弃'),
    (2,'MySQL',10,'从删库到跑路'),
    (3,'Linux',5,'从进门到进牢');

> 基本环境搭建

1、新建一Maven项目！ssmbuild ， 添加web的支持

2、导入相关的pom依赖！

<dependencies>
            
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
            </dependency>
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.47</version>
            </dependency>
    
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>8.0.26</version>
            </dependency>
    
    
            
            <dependency>
                <groupId>com.mchange</groupId>
                <artifactId>c3p0</artifactId>
                <version>0.9.5.2</version>
            </dependency>
            
            <dependency>
                <groupId>com.mchange</groupId>
                <artifactId>c3p0</artifactId>
                <version>0.9.5.5</version>
            </dependency>
            
            <dependency>
                <groupId>com.mchange</groupId>
                <artifactId>mchange-commons-java</artifactId>
                <version>0.2.20</version>
            </dependency>
    
    
    
            
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
                <version>2.5</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet.jsp</groupId>
                <artifactId>jsp-api</artifactId>
                <version>2.2</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>3.5.2</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>2.0.2</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>5.1.9.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>5.1.9.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.8</version>
            </dependency>
    
    
        </dependencies>
    
    
        <build>
            <resources>
                <resource>
                    <directory>src/main/java</directory>
                    <includes>
                        <include>**/*.properties</include>
                        <include>**/*.xml</include>
                    </includes>
                    <filtering>false</filtering>
                </resource>
                <resource>
                    <directory>src/main/resources</directory>
                    <includes>
                        <include>**/*.properties</include>
                        <include>**/*.xml</include>
                    </includes>
                    <filtering>false</filtering>
                </resource>
            </resources>
        </build>

4、建立基本结构和配置框架！  
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--------------------

> Mybatis层编写

1、数据库配置文件 **database.properties**

（这里我用的是MySQL 8.0.x版本）

jdbc.driver=com.mysql.cj.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useUnicode=true&useJDBCCompliantTimezoneShift=true&serverTimezone=UTC&characterEncoding=utf8
    jdbc.username=root
    jdbc.password=123456

2、IDEA连接数据库

3、编写MyBatis的核心配置文件 mybatis-config.xml

<?xml version="1.0" encoding="UTF8" ?>
    <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
    
        <typeAliases>
            <package name="pojo"/>
        </typeAliases>
    
        <mappers>
            <mapper resource="dao/BookMapper.xml"/>
        </mappers>
    
    </configuration>

4、编写数据库对应的实体类 pojo.Books

使用lombok插件！

package pojo;
    
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
    
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Books { 
    
        private int bookID;
        private String bookName;
        private int bookCounts;
        private String detail;
    
    }

5、编写Dao层的 Mapper接口！

package dao;
    
    import org.apache.ibatis.annotations.Param;
    import pojo.Books;
    import java.util.List;
    
    public interface BookMapper { 
    
        //增加一个Book
        int addBook(Books books);
    
        //根据id删除一个Book
        int deleteBookById(@Param("bookId") int id);
    
        //更新Book
        int updateBook(Books books);
    
        //根据id查询,返回一个Book
        Books queryBookById(@Param("bookId") int id);
    
        //查询全部Book,返回list集合
        List<Books> queryAllBook();
    
    }

6、编写接口对应的 Mapper.xml 文件。需要导入MyBatis的包；

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    
    <mapper namespace="dao.BookMapper">
    
        
        <insert id="addBook" parameterType="Books">
          insert into ssmbuild.books(bookName,bookCounts,detail)
          values (#{bookName}, #{bookCounts}, #{detail})
       </insert>
    
        
        <delete id="deleteBookById" parameterType="int">
          delete from ssmbuild.books where bookID=#{bookID}
       </delete>
    
        
        <update id="updateBook" parameterType="Books">
          update ssmbuild.books
          set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail}
          where bookID = #{bookID}
       </update>
    
        
        <select id="queryBookById" resultType="Books">
          select * from ssmbuild.books
          where bookID = #{bookID}
       </select>
    
        
        <select id="queryAllBook" resultType="Books">
          SELECT * from ssmbuild.books
       </select>
    
    </mapper>

mybatis-config.xml

7、编写Service层的接口和实现类

BookService 接口

package service;
    
    import pojo.Books;
    
    import java.util.List;
    
    //BookService:底下需要去实现,调用dao层
    public interface BookService { 
        //增加一个Book
        int addBook(Books books);
    
        //根据id删除一个Book
        int deleteBookById(int id);
    
        //更新Book
        int updateBook(Books books);
    
        //根据id查询,返回一个Book
        Books queryBookById(int id);
    
        //查询全部Book,返回list集合
        List<Books> queryAllBook();
    }

BookServiceImpl 实现类：

package service;
    
    import dao.BookMapper;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    import pojo.Books;
    
    import java.util.List;
    
    @Service
    public class BookServiceImpl implements BookService { 
    
        //调用dao层的操作，设置一个set接口，方便Spring管理
        @Autowired
        private BookMapper bookMapper;
    
        public void setBookMapper(BookMapper bookMapper) { 
            this.bookMapper = bookMapper;
        }
    
        public int addBook(Books books) { 
            return bookMapper.addBook(books);
        }
    
        public int deleteBookById(int id) { 
            return bookMapper.deleteBookById(id);
        }
    
        public int updateBook(Books books) { 
            return bookMapper.updateBook(books);
        }
    
        public Books queryBookById(int id) { 
            return bookMapper.queryBookById(id);
        }
    
        public List<Books> queryAllBook() { 
            return bookMapper.queryAllBook();
        }
    }

OK，到此，底层需求操作编写完毕！

--------------------

> Spring层

1、配置Spring整合MyBatis，我们这里数据源使用c3p0连接池；

2、我们去编写Spring整合Mybatis的相关的配置文件；spring-dao.xml

<?xml version="1.0" encoding="UTF8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
    
        
        
        <context:property-placeholder location="classpath:database.properties"/>
    
        
        
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            
            <property name="driverClass" value="${jdbc.driver}"/>
            <property name="jdbcUrl" value="${jdbc.url}"/>
            <property name="user" value="${jdbc.username}"/>
            <property name="password" value="${jdbc.password}"/>
    
            
            <property name="maxPoolSize" value="30"/>
            <property name="minPoolSize" value="10"/>
            
            <property name="autoCommitOnClose" value="false"/>
            
            <property name="checkoutTimeout" value="10000"/>
            
            <property name="acquireRetryAttempts" value="2"/>
        </bean>
    
        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            
            <property name="dataSource" ref="dataSource"/>
            
            <property name="configLocation" value="classpath:mybatis-config.xml"/>
        </bean>
    
        
        
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
            
            <property name="basePackage" value="dao"/>
        </bean>
    
    </beans>

3、Spring整合service层 spring-service.xml

Spring层搞定！

--------------------

> SpringMVC层

1、web.xml

<?xml version="1.0" encoding="UTF8"?>
    <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0">
    
        
        <servlet>
            <servlet-name>DispatcherServlet</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
                <param-name>contextConfigLocation</param-name>
                
                <param-value>classpath:applicationContext.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>DispatcherServlet</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
    
        
        <filter>
            <filter-name>encodingFilter</filter-name>
            <filter-class>
                org.springframework.web.filter.CharacterEncodingFilter
            </filter-class>
            <init-param>
                <param-name>encoding</param-name>
                <param-value>utf-8</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>encodingFilter</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    
        
        <session-config>
            <session-timeout>15</session-timeout>
        </session-config>
    
    </web-app>

2、spring-mvc.xml

3、Spring配置整合文件，applicationContext.xml

<?xml version="1.0" encoding="UTF8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    
        <import resource="classpath:spring-dao.xml"/>
        <import resource="classpath:spring-service.xml"/>
        <import resource="classpath:spring-mvc.xml"/>
    
    
    </beans>

配置文件，暂时结束！Controller 和 视图层编写

1、BookController 类编写

package controller;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Qualifier;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import pojo.Books;
    import service.BookService;
    
    import java.util.List;
    
    @Controller
    @RequestMapping("/book")
    public class BookController { 
    
        @Autowired
        @Qualifier("BookServiceImpl")
        private BookService bookService;
    
        @RequestMapping("/allBook")
        public String list(Model model) { 
            List<Books> list = bookService.queryAllBook();
            model.addAttribute("list", list);
            return "allBook";
        }
    
        @RequestMapping("/toAddBook")
        public String toAddPaper() { 
            return "addBook";
        }
    
        @RequestMapping("/addBook")
        public String addPaper(Books books) { 
            System.out.println(books);
            bookService.addBook(books);
            return "redirect:/book/allBook";
        }
    
        @RequestMapping("/toUpdateBook")
        public String toUpdateBook(Model model, int id) { 
            Books books = bookService.queryBookById(id);
            System.out.println(books);
            model.addAttribute("book",books );
            return "updateBook";
        }
    
        @RequestMapping("/updateBook")
        public String updateBook(Model model, Books book) { 
            System.out.println(book);
            bookService.updateBook(book);
            Books books = bookService.queryBookById(book.getBookID());
            model.addAttribute("books", books);
            return "redirect:/book/allBook";
        }
    
        @RequestMapping("/del/{bookId}")
        public String deleteBook(@PathVariable("bookId") int id) { 
            bookService.deleteBookById(id);
            return "redirect:/book/allBook";
        }
    }

2、编写首页 index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
    <!DOCTYPE HTML>
    <html>
    <head>
       <title>首页</title>
       <style type="text/css"> a { text-decoration: none; color: black; font-size: 18px; } h3 { width: 180px; height: 38px; margin: 100px auto; text-align: center; line-height: 38px; background: deepskyblue; border-radius: 4px; } </style>
    </head>
    <body>
    
    <h3>
       <a href="${pageContext.request.contextPath}/book/allBook">点击进入列表页</a>
    </h3>
    </body>
    </html>

3、书籍列表页面 allbook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
       <title>书籍列表</title>
       <meta name="viewport" content="width=device-width, initial-scale=1.0">
       
       <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    </head>
    <body>
    
    <div class="container">
    
       <div class="row clearfix">
           <div class="col-md-12 column">
               <div class="page-header">
                   <h1>
                       <small>书籍列表 —— 显示所有书籍</small>
                   </h1>
               </div>
           </div>
       </div>
    
       <div class="row">
           <div class="col-md-4 column">
               <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
           </div>
       </div>
    
       <div class="row clearfix">
           <div class="col-md-12 column">
               <table class="table table-hover table-striped">
                   <thead>
                   <tr>
                       <th>书籍编号</th>
                       <th>书籍名字</th>
                       <th>书籍数量</th>
                       <th>书籍详情</th>
                       <th>操作</th>
                   </tr>
                   </thead>
    
                   <tbody>
                   <c:forEach var="book" items="${requestScope.get('list')}">
                       <tr>
                           <td>${book.getBookID()}</td>
                           <td>${book.getBookName()}</td>
                           <td>${book.getBookCounts()}</td>
                           <td>${book.getDetail()}</td>
                           <td>
                               <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a> |
                               <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a>
                           </td>
                       </tr>
                   </c:forEach>
                   </tbody>
               </table>
           </div>
       </div>
    </div>

4、添加书籍页面：addBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    
    <html>
    <head>
       <title>新增书籍</title>
       <meta name="viewport" content="width=device-width, initial-scale=1.0">
       
       <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    </head>
    <body>
    <div class="container">
    
       <div class="row clearfix">
           <div class="col-md-12 column">
               <div class="page-header">
                   <h1>
                       <small>新增书籍</small>
                   </h1>
               </div>
           </div>
       </div>
       <form action="${pageContext.request.contextPath}/book/addBook" method="post">
          书籍名称：<input type="text" name="bookName"><br><br><br>
          书籍数量：<input type="text" name="bookCounts"><br><br><br>
          书籍详情：<input type="text" name="detail"><br><br><br>
           <input type="submit" value="添加">
       </form>
    
    </div>

5、修改书籍页面 updateBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
       <title>修改信息</title>
       <meta name="viewport" content="width=device-width, initial-scale=1.0">
       
       <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    </head>
    <body>
    <div class="container">
    
       <div class="row clearfix">
           <div class="col-md-12 column">
               <div class="page-header">
                   <h1>
                       <small>修改信息</small>
                   </h1>
               </div>
           </div>
       </div>
    
       <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
           <input type="hidden" name="bookID" value="${book.getBookID()}"/>
          书籍名称：<input type="text" name="bookName" value="${book.getBookName()}"/>
          书籍数量：<input type="text" name="bookCounts" value="${book.getBookCounts()}"/>
          书籍详情：<input type="text" name="detail" value="${book.getDetail() }"/>
           <input type="submit" value="提交"/>
       </form>
    
    </div>

因为是手动添加web支持，所以要手动导入lib包。

1、找到如图所示的位置  
![在这里插入图片描述][838225df408b475d814f2eeef6177714.PNG_pic_center]  
2、![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDA5NjM1Mw_size_16_color_FFFFFF_t_70_pic_center 1]  
3、选择lib文件，然后点上面的 + 号，选择 Library Files,然后将里面的包全部导入即可。![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDA5NjM1Mw_size_16_color_FFFFFF_t_70_pic_center 2]

最后配置Tomcat，进行运行！

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[838225df408b475d814f2eeef6177714.PNG_pic_center]: /images/20220829/f6ed9febf5f74a7c80d11403a19fe54c.png
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