SpringBoot（一）：构建第一个SpringBoot工程

1.项目格式如下：

1.启动类：

package com.monkey01.springbootstart;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
public class SpringbootStartApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootStartApplication.class, args);
    }
}

2.controller 类：

package com.monkey01.springbootstart.controller;

import org.json.JSONObject;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.*;

/**
 * Created by feiweiwei on 17/7/31.
 */
//@RestController注解能够使项目支持Rest
@RestController
@SpringBootApplication
//表示该controller类下所有的方法都公用的一级上下文根
@RequestMapping(value = "/springboot")
public class UserController {

    //这里使用@RequestMapping注解表示该方法对应的二级上下文路径
    @RequestMapping(value = "/getUserByGet", method = RequestMethod.GET)
    String getUserByGet(@RequestParam(value = "userName") String userName){
        return "Hello " + userName;
    }

    //通过RequestMethod.POST表示请求需要时POST方式
    @RequestMapping(value = "/getUserByPost", method = RequestMethod.POST)
    String getUserByPost(@RequestParam(value = "userName") String userName){
        return "Hello " + userName;
    }

    //在入参设置@RequestBody注解表示接收整个报文体，这里主要用在接收整个POST请求中的json报文体，
    //目前主流的请求报文也都是JSON格式了，使用该注解就能够获取整个JSON报文体作为入参，使用JSON解析工具解析后获取具体参数
    @RequestMapping(value = "/getUserByJson",method = RequestMethod.POST)
    String getUserByJson(@RequestBody String data){
        return "Json is " + data;
    }

    public static void main(String[] args) {
        JSONObject map = new JSONObject();
        map.put("accid", 1);
    }
}

3. application.properties： 

server.port=8080

4.pom.xml文件如下：

<?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.monkey01</groupId>
    <artifactId>springboot-start</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springboot-start</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.7.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>

5.启动springboot项目访问：

post方法：http://localhost:8080/springboot/getUserByPost?userName=liming

get方法: http://localhost:8080/findUsers         http://localhost:8080/user/2

post方法: http://localhost:8080/delte/3