Spring Boot 简单入门

添加相关依赖

<?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>wonder</groupId>
    <artifactId>skyRainbow</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

创建程序启动入口文件

package lf;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication // SpingBoot 相关注解,等于@Configuration、@EnableAutoConfiguration、@ComponentScan三个注解一起的作用
public class SkyRainbowApplication {

    public static void main(String[] args) {
        /**
         * Spring boot 程序入口
         */
        SpringApplication.run(SkyRainbowApplication.class,args);
    }
}

创建相关类文件

package lf.entity;


public class SRUser {

    private String username;

    private String password;

    private String email;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }
}

package lf.controller;

import lf.entity.SRUser;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller // 控制器注解
@RequestMapping("/lf/user") 
public class UserController {

    /**
     * 获取用户信息
     */
    @ResponseBody // 返回json数据的注解
    @RequestMapping(value = "/info",method = RequestMethod.GET)
    public SRUser getUserInfo(){
       SRUser user = new SRUser();
       user.setUsername("甘雨路");
       user.setPassword("123456");
       user.setEmail("1498222322@qq.com");
       return user;
    }

}

打开启动文件，并运行

 在浏览器上输入http://localhost:8080/lf/user/info 即可

 其中要注意启动文件要放在外层，否则无法自动扫描所有文件：