01. Hello World!
一、环境准备
1、JDK1.8
2、开发工具STS3.8.4
3、项目管理工具Maven3.5.0
二、新建MAVEN项目
三、编辑pom.xml文件
1、新增parent标签
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.3.RELEASE</version>
</parent>
2、新增jdk版本约束
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
3、新增spring-boot-starter-web依赖
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
4、完整pom.xml文件
<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>org.goldwind</groupId>
<artifactId>01HelloWorld</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
-
<name>01HelloWorld</name>
<url>http://maven.apache.org</url>
-
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.3.RELEASE</version>
</parent>
-
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
-
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>
四、编写Controller
package org.goldwind;
-
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
-
@RestController
public class HelloWorldController {
@RequestMapping("/hello")
public String hello(){
return "Hello World!";
}
}
五、编写App.java
package org.goldwind;
-
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
-
/**
* Hello world!
*
*/
@SpringBootApplication
public class App
{
public static void main( String[] args )
{
System.out.println( "Hello World!" );
SpringApplication.run(App.class, args);
}
}
六、启动项目
以启动java工程的方式启动App.java中的main函数
访问路径:http://localhost:8080/hello
注意,如果MAVEN项目报错,请按如下方式解决:
Alt+F5——勾选当前项目(默认已经勾选)——OK