分组校验

public void validData(Object bean,Class<?>... groups) {
String errMessage = validate(bean,groups);
if (errMessage .length>0) {
 throw new BusinessException(SystemErrcode.xxx.getCode,errMessage); 
}
}

private static String validate(Object obj,Class<?>... groups) {
//存储验证后的错误信息
StringBuffer sb = new StringBuffer();
Validator validator=getValidator();
//验证某个对象的所有属性
Set<ConstraintViolation<Object>> constrainViolation= validator.validate(obj,groups);
Iter<ConstraintViolation<Object>> iter =constrainViolation.iterator();
while(iter.hasNext()) {
String message=iter.next().getMessage();
sb.append(message);
break;
}
return sb.toString();
}

private static Validator getValidator() {
 return Validation.buildDefaultValidatorFactory().getValidator() 
}

　　

＠NotNull 通用

@NotBlank String类型

@NotEmpty 非String类型，如List类型

注意，如果是Integer、Long类型的话，只能用@NotNull

  

通用异常：

public abstract class BasicException extends Exception {
 private String code;
 private String message;

public BE(String code) {
super();
this.code=code;
}

public BE(String code,String message) {
super(message);
this.code=code;
this.message=message;
}

public BE(String code,String message,Throwable cause) {
super(message,cause);
this.code=code;
this.message=message;
}

然后get、set方法， 有参方法及有参的3个参数，包括Throwable cause 方法里面是信息都是super(参数) this.参数=参数 }

　项目具体异常的话直接继承上面的通用异常即可。

如

Public class BusinessException extends BasicException {
 Public BusinessException (String code) {
 super(code);
}

Public BusinessException (String code,String message) {
 super(code,message);
}
Public BusinessException (String code,String message,Throwable cause) {
 super(code,message,cause);
}

}

　　

@ExceptionHandler({Exception.class})
public xxx defaultErrorHandler(HttpServletRequest request,Exception e) {
 String errMsg="未知错误";
 String code="500";
log.error("类名 requestPath:{} errorMessage:{} error:{}",request.getRequestURI,e.toString(),e);

if (e instanceof XXXException) {
errMsg="XX错误";
code="xxxxx";
} else if(e instanceof BusinessException) {
 errMsg=e.getMessage();
 code=((BusinessException)e).getCode();
}else {
 String message=e.getMessage();
 if (e instanceof BusinessException) {
errMsg=message;
String errCode=((BusinessException) e).getCode();
}
}
}