做网站需要神网站怎样优化文章关键词

思路，

 1、传入要校验的属性以及如果校验不过提示信息

 2、如果数据校验不过返回json 格式信息。

 3、不满足条件抛出自定义异常，然后在异常处理器中获取信息，return 信息

 

一、自定义异常

public class LyonException extends RuntimeException{private static final long serialVersionUID = 1L;private String msg;private int code = 500;code 默认是500public LyonException(String msg) {super(msg);this.msg = msg;}

    public LyonException(String msg, int code) {
       super(msg);
       this.msg = msg;
       this.code = code;
   }

 

二、异常处理器

/*** 异常处理器* @author    lyon* @date    2018年3月2日*/
@RestControllerAdvice
public class LyonExceptionHandler {@ExceptionHandler(LyonException.class)public R handlerLyonException(LyonException e){R r = new R();r.put("code", e.getCode());r.put("msg", e.getMessage());return r;}
}

 

三、返回值R

public class R extends HashMap<String, Object> {private static final long serialVersionUID = 1L;public R() {put("code", 0);put("msg", "操作成功");}public static R error() {return error(1, "操作失败");}public static R error(String msg) {return error(500, msg);}public static R error(int code, String msg) {R r = new R();r.put("code", code);r.put("msg", msg);return r;}public static R ok(String msg) {R r = new R();r.put("msg", msg);return r;}

 

四、工具类

/*** 数据校验* @author    lyon* @date    2018年3月2日*/
public abstract class Assert {/*** @param str 校验的字符串* @param msg 提示信息*/public static void isBlank(String str,String msg){if(StringUtils.isBlank(str)){throw new LyonException(msg);}}public static void isNull(Object object, String message) {if (object == null) {throw new LyonException(message);}}
}

 

五、测试

    @GetMapping("/test")@ResponseBodypublic R hello(String name) {Assert.isBlank(name, "用户名不能为空");return R.ok();}