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@Data

@Builder

public class Article {

    private Long  id;

    private String author;

    private String title;

    private String content;

    private Date createTime;

    private List<Reader> reader;

}

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@Data

public class Reader {

  private String name;

  private Integer age;

}

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@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)

  /*@PostMapping("/articles")

  public AjaxResponse saveArticle(@RequestParam  String author,

                                  @RequestParam  String title,

                                  @RequestParam  String content,

                                  @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")

                                  @RequestParam  Date createTime){

    log.info("saveArticle:" + createTime);

    return AjaxResponse.success();

  }*/

  //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();

  }

}

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

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@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;

  }

}