利用Hibernate Validator实现对Bean的参数验证

    private static Validator validator; // 它是线程安全的 

 

    static { 

        ValidatorFactory factory = Validation.buildDefaultValidatorFactory(); 

        validator = factory.getValidator(); 

    } 

     

    public static <T> void validate(T t) { 

        Set<ConstraintViolation<T>> constraintViolations = validator.validate(t); 

        if(constraintViolations.size() > 0) { 

            String validateError = ""; 

            for(ConstraintViolation<T> constraintViolation: constraintViolations) { 

                validateError += constraintViolation.getMessage() + ";"; 

            } 

            throw new ValidateException(validateError); 

        } 

    }