springboot第一天 快速启动,json输出
自动生成springboot的maven项目 网址:http://start.spring.io/
一.springboot 快速启动:
1.新建一个maven web项目
2.配置pom文件,加入springboot的代码:
pom文件的配置:
<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>spring-boot</groupId>
<artifactId>springboot01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot01</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.0.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
</project>
3.新建测试类:
启动文件:
package spring_boot.springboot01;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@SpringBootApplication
@Controller
public class TestController {
@RequestMapping("/")
@ResponseBody
public String test(){
System.out.println("====================");
return "你好您好Hello Wordsfdd !fgdfgfhgfhgf";
}
public static void main(String[] args){
SpringApplication.run(TestController.class, args);
}
}
最后一步:
右击项目 点击 run As ==> Maven clear ====> maven install ===> 运行main 函数 ===》 在浏览器输入:localhost:8080/
二.springboot返回json数据
1.新建maven项目
2.编写pom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>spring-boot</groupId>
<artifactId>springboot02</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot02</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.0.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.20</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
3.创建实体类:
public class User {
private int id;
private String name;
private String address;
private String age;
get和set 还有toString方法这里省略..
}
4.创建测试controller
1).第一种方式:
package spring_boot.springboot02.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import spring_boot.springboot02.model.User;
@RestController
public class TestController {
@RequestMapping("/")
public User test() {
User user = new User();
user.setId(12);
user.setName("张三丰");
user.setAddress("四川成都");
user.setAge("140岁");
return user;
}
}
运行项目:
右击项目 点击 run As ==> Maven clear ====> maven install
右击项目
点击 run As ===> java application ===》 在浏览器输入:localhost:8080/
页面访问:
2).第二种方式:
package spring_boot.springboot02.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import spring_boot.springboot02.model.User;
@Controller
public class TestController2 {
@ResponseBody
@RequestMapping("/test2")
public User test() {
User user = new User();
user.setId(13);
user.setName("张四丰");
user.setAddress("四川成都");
user.setAge("150岁");
return user;
}
}
运行项目:
右击项目 点击 run As ==> Maven clear ====> maven install
右击项目
点击 run As ===> java application ===》 在浏览器输入:localhost:8080/ test2