1 IntelliJ IDEA下载和Maven搭建

1 IntelliJ IDEA 官方下载地址
2 JDK 和 maven下载和环境配置
注:因为SpringBoot内置tomcat 所以不用下载配置

2 新建project 和配置 SpringBoot开发环境

1打开idea

new project → 选择Maven → Next

创建新项目.png

2找到pom.xml文件 copy以下代码覆盖原有内容

<?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.lena</groupId>
    <artifactId>demo</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packagingexample>jar</packagingexample>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.0.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>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3更新下载 maven中的jar包

选择工程右键 → Maven → Reimport

更新maven中jar包配置.png

3 完善新建工程目录

文件目录.png

application.properties中代码

#修改端口号8080改为8888
server.port=8888

MyApplication中代码

package example;

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

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

实体类MyInfo中代码

package example;

public class MyInfo {

    private long id;//主键.
    private String name;//测试名称.

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

JsonController 中代码

package example;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class JsonController {
    @RequestMapping("/info")
    public MyInfo info() {
        MyInfo info = new MyInfo();
        info.setId(1003220931);
        info.setName("LeeBoo");
        return info;
    }
}

菜单栏Run → Edit Configurations 打开下图窗口
Main class栏选择Myapplication → 点击按钮Ok 和 Apply