Validator自动验证与手动验证

自动：

public JResult projectAdd(@Valid Project project, BindingResult result) {Map<String,Object> map = new HashMap<>();

if (result.hasErrors()) {
   List<FieldError> errs = result.getFieldErrors();
   String mapErrors = "";
   for (FieldError err : errs) {
      mapErrors += err.getDefaultMessage() + ",";
   }
   mapErrors = mapErrors.substring(0, mapErrors.length() - 1);
   map.put("message",mapErrors);
   return new JResult(Constants.CODE_VALIDATION, mapErrors, map);
}

手动：

Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
Set<ConstraintViolation<Object>> constraintViolations = validator
        .validate(contactPerson);//验证某个对象,，其实也可以只验证其中的某一个属性的
Iterator<ConstraintViolation<Object>> iter = constraintViolations
        .iterator();
List<String> error = new ArrayList<>();
while  (iter.hasNext()) {
    String message = iter.next().getMessage();
    error.add(message);
}