springBoot入门笔记

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项目目录结构：

com     +- xx         +- Application.java         |         +- controller         |   +- SimpleController .java         |         +- entity             +- User.java

1. Eclipse创建一个简单的Maven工程：

2.修改pop.xml

把下面代码添加进去

    <parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.1.RELEASE</version>    </parent>    <dependencies><dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-web</artifactId></dependency>    </dependencies>

3.实体类

package com.xx.entity;public class User {private int id;private String name;public User() {}public User(int id, String name) {this.id = id;this.name = name;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}}

4.Controller类

package com.xx.controller;import org.springframework.web.bind.annotation.*;import com.xx.entity.User;@RestControllerpublic class SimpleController {@RequestMapping("/hello")String hello() {return "Hello World!";}@RequestMapping("/user/{id}")User user(@PathVariable("id") int id) {User user = new User(id, "yourName");return user;}}

5.Application类

package com.xx;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.EnableAutoConfiguration;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;@Configuration@ComponentScan@EnableAutoConfigurationpublic class Application {public static void main(String[] args) throws Exception {        SpringApplication.run(Application.class);    }}

6.Spring Boot建议将我们main方法所在的主要的配置类配置在根包名下。

在这个工程里“main方法所在的主要的配置类”为Application类。（见顶部目录图）

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