第一个 Spring Boot 程序 : 构建 RESTful 服务

来源：互联网发布：u center软件编辑：程序博客网时间：2024/04/29 02:34

把我们基础的项目来升级一点点，还是照着文档来 https://spring.io/guides/gs/rest-service/

web.xml 没有变化

项目分成了几个包

实体类 Greeting

public class Greeting {private final long id;private final String content;public Greeting(long id, String content) {this.id = id;this.content = content;}public long getId() {return id;}public String getContent() {return content;}}

controller

import java.util.concurrent.atomic.AtomicLong;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;import com.lzf.bean.Greeting;@RestControllerpublic class GreetingController {private static final String template = "Hello, %s !";private final AtomicLong counter = new AtomicLong();@RequestMapping("/greeting")public Greeting greeting(@RequestParam(value = "name", defaultValue = "World") String name) {return new Greeting(counter.incrementAndGet(), String.format(template, name));}}

main 函数

import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}}

运行

http://localhost:8080/greeting ----> {"id":1,"content":"Hello, World !"}

http://localhost:8080/greeting?name=user ---> {"id":2,"content":"Hello, user !"}

确实方便，没写一个xml

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