测试开发进阶——spring boot——MVC——Spring MVC框架的数据验证——校验框架 @Valid 和 @Validated的使用

 

 

 

/**
 * 多个对象校验
 * @param user
 * @param bindingResult
*/
@RequestMapping("/user/saveAll")
public void saveAll(@Validated User user, BindingResult bindingResult,@Validated Student student, BindingResult bindingResult2) {
    if (bindingResult.hasErrors()) {
        for (ObjectError error : bindingResult.getAllErrors()) {
            System.out.println(error.getDefaultMessage());
        }

    }
    System.out.println("-----------");

    if (bindingResult2.hasErrors()) {
        for (ObjectError error : bindingResult2.getAllErrors()) {
            System.out.println(error.getDefaultMessage());
        }

    }
}

　　

 

 

 

 

 

 

@Validated   //第1步，告诉MethodValidationPostProcessor此Bean需要开启方法级别验证支持
@RestController
public class ValidationController {

	@RequestMapping(value = "/validation/demo")
	public void demo1(
			@Range(min = 1, max = 9, message = "年级只能从1-9")   //第2步
			@RequestParam(name = "grade", required = true) int grade, //
			
			@Min(value = 1, message = "班级最小只能1") @Max(value = 99, message = "班级最大只能99")  //第2步
			@RequestParam(name = "classroom", required = true) int classroom) { //

		System.out.println(grade + "," + classroom);
	}
}

　　

测试：

package com.awaimai.web;

import org.hibernate.validator.constraints.Range;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;

import javax.validation.Valid;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;


@Controller
@Validated
public class kzq
{



    @RequestMapping(value = "/test8")
    @ResponseBody
    public String test8(@RequestParam(name = "a", required = true) @Range(min = 1, max = 9, message = "年级只能从1-9") int a, 
                        @Min(value = 1, message = "班级最小只能1") @Max(value = 99, message = "班级最大只能99") int b)
    {

        System.out.println(a + "," + b);
        return "123";
    }






}

　　

执行：

 

 

 

下面提供一种全局的异常信息捕获方法：

使用 @ControllerAdvice 注解，具本如下：

@ControllerAdvice
@Component
public class GlobalExceptionHandler {

	/**
	 * 拦截捕捉 MissingServletRequestParameterException 异常
	 */
	@ResponseBody
	@ExceptionHandler(value = MissingServletRequestParameterException.class)
	public String doMissingServletRequestParameterHandler(MissingServletRequestParameterException exception) {
		MissingServletRequestParameterException exs = (MissingServletRequestParameterException) exception;
		System.err.println(exs.getMessage());
		return "bad request, ";
	}

	/**
	 * 拦截捕捉 ConstraintViolationException 异常
	 */
	@ResponseBody
	@ExceptionHandler(value = ConstraintViolationException.class)
	public Map ConstraintViolationExceptionHandler(ConstraintViolationException ex) {
		Map map = new HashMap();
		Set<ConstraintViolation<?>> constraintViolations = ex.getConstraintViolations();
		Iterator<ConstraintViolation<?>> iterator = constraintViolations.iterator();
		List<String> msgList = new ArrayList<>();
		while (iterator.hasNext()) {
			ConstraintViolation<?> cvl = iterator.next();
			System.err.println(cvl.getMessageTemplate());
			msgList.add(cvl.getMessageTemplate());
		}
		map.put("status", 500);
		map.put("msg", msgList);
		return map;
	}

    /**
	 * 拦截捕捉 MethodArgumentNotValidException 异常
	 */
    @ExceptionHandler(MethodArgumentNotValidException.class)
	public Map  doMethodArgumentNotValidException2(MethodArgumentNotValidException ex){
	    Map map = new HashMap();
	    map.put("status", 500);
		map.put("msg", "请求异常");
		
		BindingResult result = ex.getBindingResult();
		List<String> msgList = new ArrayList<String>();
		if (result.hasErrors()) {
			List<ObjectError> errors = result.getAllErrors();
			ObjectError error=errors.get(0);
			msgList.add(error.getDefaultMessage());
			String firstMsg=msgList.get(0);			
		    map.put("msg", msgList);
			return map ;
		}
		return map ;
	}
	
   /**
	 * 拦截捕捉 BindException 异常
	 */
	@ExceptionHandler(BindException.class)
	@ResponseBody
	public R handleBindException(BindException ex) {
		List<FieldError> bindingResult = ex.getBindingResult().getFieldErrors();
		List<String> msgList = new ArrayList<String>();
		for (FieldError fieldError : bindingResult) {
			System.err.println(fieldError.getField() + " " + fieldError.getDefaultMessage());
			msgList.add(fieldError.getDefaultMessage());
		}
		String firstMsg = msgList.get(0);
		return R.error(firstMsg);
	}

}