SpringBoot学习笔记#1 创建一个RESTful Web服务

新建一个spring boot工程

新建一个POJO类

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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;     } }

新建一个controller

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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;   @RestController public 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));     } }

*@RestController注释标志这个类的所有方法都返回一个领域对象而不是视图，是@Controller和@ResponseBody结合的简写

*Spring自动使用MappingJackson2HttpMessageConverter将Greeting示例转为JSON

启动工程

修改项目根路径

application.properties

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1	spring.mvc.servlet.path=/acme

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