spring-boot - demo

水深无声 2022-07-16 07:42 205阅读 0赞

当我发现把最初的一个demo整的面目全非的时候，突然想要找一个简单的demo做测试，发现与其在原来的上面该，还不如新建一个demo。

官方入门：http://projects.spring.io/spring-boot/

最熟悉maven，这次先做一个maven的demo。

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创建maven project。

pom：

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<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.test</groupId>
        <artifactId>demo</artifactId>
        <version>1.0-SNAPSHOT</version>
    
        <repositories>
            
                
                
                
                    
                
            
            <repository>
                <id>springsource-repos</id>
                <name>SpringSource Repository</name>
                <url>http://repo.spring.io/release/</url>
            </repository>
            <repository>
                <id>central-repos</id>
                <name>Central Repository</name>
                <url>http://repo.maven.apache.org/maven2</url>
            </repository>
            <repository>
                <id>central-repos2</id>
                <name>Central Repository 2</name>
                <url>http://repo1.maven.org/maven2/</url>
            </repository>
        </repositories>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-dependencies</artifactId>
                    <version>1.4.0.RELEASE</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <optional>true</optional>
            </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>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <fork>true</fork>
                    </configuration>
                    <dependencies>
                        
                        <dependency>
                            <groupId>org.springframework</groupId>
                            <artifactId>springloaded</artifactId>
                            <version>1.2.6.RELEASE</version>
                        </dependency>
                    </dependencies>
                </plugin>
            </plugins>
        </build>
    </project>

这里添加了web基础依赖，模板为thymeleaf, 添加一个简单的security配置。

创建src/resources/application.yml:

spring:
      profiles:
        active: dev

创建src/resources/application-dev.yml:

#用户名 密码配置
    security:
      user:
        name: admin
        password: test

创建启动入口hello.SampleController：

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package hello;
    
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    @Controller
    @SpringBootApplication
    public class SampleController {
    
        @RequestMapping("/")
        public String home() {
            return "redirect:/hello/index";
        }
    
        public static void main(String[] args) throws Exception {
            SpringApplication.run(SampleController.class, args);
        }
    }

创建一个Controller: hello.HelloController

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package hello;
    
    import hello.entity.User;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.validation.Errors;
    import org.springframework.web.bind.annotation.ModelAttribute;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    import javax.validation.Valid;
    import java.util.HashMap;
    import java.util.Map;
    
    /**
     * Created by miaorf on 2016/8/2.
     */
    @RequestMapping("/hello")
    @Controller
    public class HelloController {
    
        @RequestMapping("/index")
        public String hello(Model model, @RequestParam(defaultValue = "Ryan") String name){
            model.addAttribute("name",name);
            return "index";
        }
    
        @ResponseBody
        @RequestMapping("/info")
        public Map info(@Valid @ModelAttribute("user")User user, Errors errors){
    
            Map map = new HashMap();
            if (errors.hasErrors()){
                map.put("error",errors.getAllErrors());
            }else{
                map.put("user",user);
            }
    
            return map;
        }
    }

这里连个路由。一个指向模板文件index，一个返回json并添加了参数校验。

需要使用的实体类：hello.entity.User

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package hello.entity;
    
    import org.hibernate.validator.constraints.Length;
    
    import javax.validation.constraints.NotNull;
    import javax.validation.constraints.Pattern;
    
    /**
     * Created by miaorf on 2016/8/2.
     */
    public class User {
        @NotNull(message = "用户名不能为空")
        @Length(min=5, max=20, message="用户名长度必须在5-20之间")
        @Pattern(regexp = "^[a-zA-Z_]\\w{4,19}$", message = "用户名必须以字母下划线开头，可由字母数字下划线组成")
        private String name;
        @NotNull(message = "age不能为空")
        private int age;
        @NotNull(message = "sex不能为空")
        private String sex;
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public int getAge() {
            return age;
        }
    
        public void setAge(int age) {
            this.age = age;
        }
    
        public String getSex() {
            return sex;
        }
    
        public void setSex(String sex) {
            this.sex = sex;
        }
    }

需要用到的模板文件：src/resources/templates/index.html

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<!DOCTYPE HTML>
    <html xmlns:th="http://www.thymeleaf.org">
    <head>
        <title>Getting Started: Serving Web Content</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    </head>
    <body>
    <p th:text="'Hello, ' + ${name} + '!'" />
    </body>
    </html>

github: https://github.com/chenxing12/spring-boot-demo

[686418-20160802182849325-1766536607.png]: /images/20220716/1ead18eac7aa48afb48f87ede457022a.png
[ContractedBlock.gif]: http://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif
[ExpandedBlockStart.gif]: /images/20220716/7f0695f0d65e4a82875b78d727709cb6.png