spring常用注解开发一个RESTful接口示例

@Data
@Builder
public class Article {
    private Long  id;
    private String author;
    private String title;
    private String content;
    private Date createTime;
    private List<Reader> reader;
}

@Data
public class Reader {
  private String name;
  private Integer age;
}

@Slf4j
@RestController
@RequestMapping("/rest")
public class ArticleController {
  //获取一篇Article，使用GET方法,根据id查询一篇文章
  //@RequestMapping(value = "/articles/{id}",method = RequestMethod.GET)
  @GetMapping("/articles/{id}")
  public ajaxResponse getArticle(@PathVariable("id") Long id){
    //使用lombok提供的builder构建对象
    Article article = Article.builder()
            .id(id)
            .author("zimug")
            .content("Spring Boot 从青铜到王者")
            .createTime(new Date())
            .title("t1").build();
    log.info("article:" + article);
    return AjaxResponse.success(article);
  }
  //增加一篇Article ，使用POST方法(RequestBody方式接收参数)
  //@RequestMapping(value = "/articles",method = RequestMethod.POST)
  @PostMapping("/articles")
  public AjaxResponse saveArticle(@RequestBody Article article,
                                  @RequestHeader String aaa){
    //因为使用了lombok的Slf4j注解，这里可以直接使用log变量打印日志
    log.info("saveArticle:" + article);
    return AjaxResponse.success();
  }
  //增加一篇Article ，使用POST方法(RequestParam方式接收参数)
  
  //更新一篇Article，使用PUT方法，以id为主键进行更新
  //@RequestMapping(value = "/articles",method = RequestMethod.PUT)
  @PutMapping("/articles")
  public AjaxResponse updateArticle(@RequestBody Article article){
    if(article.getId() == null){
      //article.id是必传参数，因为通常根据id去修改数据
      //TODO 抛出一个自定义的异常
    }
    log.info("updateArticle:" + article);
    return AjaxResponse.success();
  }
  //删除一篇Article，使用DELETE方法，参数是id
  //@RequestMapping(value = "/articles/{id}",method = RequestMethod.DELETE)
  @DeleteMapping("/articles/{id}")
  public AjaxResponse deleteArticle(@PathVariable("id") Long id){
    log.info("deleteArticle:" + id);
    return AjaxResponse.success();
  }
}

private static final Logger log = LoggerFactory.getLogger(HelloController.class);

@Data
public class AjaxResponse {
  private boolean isok;  //请求是否处理成功
  private int code; //请求响应状态码（200、400、500）
  private String message;  //请求结果描述信息
  private Object data; //请求结果数据（通常用于查询操作）
  private AjaxResponse(){}
  //请求成功的响应，不带查询数据（用于删除、修改、新增接口）
  public static AjaxResponse success(){
    AjaxResponse ajaxResponse = new AjaxResponse();
    ajaxResponse.setIsok(true);
    ajaxResponse.setCode(200);
    ajaxResponse.setMessage("请求响应成功!");
    return ajaxResponse;
  }
  //请求成功的响应，带有查询数据（用于数据查询接口）
  public static AjaxResponse success(Object obj){
    AjaxResponse ajaxResponse = new AjaxResponse();
    ajaxResponse.setIsok(true);
    ajaxResponse.setCode(200);
    ajaxResponse.setMessage("请求响应成功!");
    ajaxResponse.setData(obj);
    return ajaxResponse;
  }
  //请求成功的响应，带有查询数据（用于数据查询接口）
  public static AjaxResponse success(Object obj,String message){
    AjaxResponse ajaxResponse = new AjaxResponse();
    ajaxResponse.setIsok(true);
    ajaxResponse.setCode(200);
    ajaxResponse.setMessage(message);
    ajaxResponse.setData(obj);
    return ajaxResponse;
  }
}