环境要求
1、java 7以上,下载地址
2、IntellJ IDEA Ultimate 版本(自行破解),
下载地址
新建一个maven工程
后面请直接【Next】即可,名字自定义
新建之后,打开pom.xml文件,将以下内容替换上。
<?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.byron</groupId>
<artifactId>spring_demo</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<exec.mainClass>com.gonsin.handdraw.Application</exec.mainClass>
</properties>
<!--spring boot 环境需要添加的内容-->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
</parent>
<!--spring boot 环境需要添加的内容-->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
</plugins>
</build>
<!--spring boot 环境需要添加的内容-->
<dependencies>
<!--spring boot 相关-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mvc</artifactId>
</dependency>
</dependencies>
</project>
java文件夹的目录如下,照着创建就行
java
|- com
|- byron
|- spring
|- demo
Application.java
|- controller
HelloController.java
HelloController.java的内容
package com.byron.spring.demo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping
public class HelloController {
@RequestMapping("/hello")
@ResponseBody
public String hello(@RequestParam(name = "name", defaultValue = "spring", required = false) String name){
return "hello " + name;
}
}
Application.java 的内容
package com.byron.spring.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@ComponentScan("com.byron.spring.demo")
public class Application {
public static void main(String[] args){
SpringApplication.run(Application.class, args);
}
}
在main方法里鼠标【右键】,点击【Run Application.main()】
大概10秒后,打开浏览器,输入 http://localhost:8080/hello 点击回车。
一个最简单的基于Spring Boot 的Web应用程序就完成。
课后作业
1、请同学们自行了解以下标注的作用,以及用法。
@RestController
@RequestMapping
@RequestParam
@ResponseBody
2、默认的SpringBoot项目监听的是8080端口,怎么修改成80端口?