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

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

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

spring.mvc.servlet.path=/acme

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