Spring Boot REST @RequestParam 未被验证

Question

我尝试了一些来自网络的示例，但无法让 Spring 验证我的查询字符串参数。似乎没有执行 REGEX / 失败。

package my.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.validation.Valid;
import javax.validation.constraints.Pattern;

import static org.springframework.web.bind.annotation.RequestMethod.GET;

@RestController
public class MyController {

    private static final String VALIDATION_REGEX = "^[0-9]+(,[0-9]+)*$";

    @RequestMapping(value = "/my/{id}", method = GET)
    public myResonseObject getMyParams(@PathVariable("id") String id,
                                       @Valid @Pattern(regexp = VALIDATION_REGEX) 
                                       @RequestParam(value = "myparam", required = true) String myParam) {
         // Do Stuff!
    }

}

当前行为

PASS - /my/1?myparam=1
PASS - /my/1?myparam=1,2,3
PASS - /my/1?myparam=
PASS - /my/1?myparam=1,bob

期望的行为

PASS - /my/1?myparam=1
PASS - /my/1?myparam=1,2,3
FAIL - /my/1?myparam=
FAIL - /my/1?myparam=1,bob

谢谢

Answer 1

你可以试试这个

@Pattern(regexp="^[0-9]+(,[0-9]+)*$")
private static final String VALIDATION_REGEX;

（注意最后的修饰符） 否则

 @Pattern()
 private static final String VALIDATION_REGEX = "^[0-9]+(,[0-9]+)*$";

然后从您的方法中删除 @Pattern(regexp = VALIDATION_REGEX) 并仅保留 @Valid 注释：

public myResonseObject getMyParams(@PathVariable("id") String id, @Valid @RequestParam(value = "myparam", required = true) String myParam) {

Answer 2

您需要像这样将@Validated 添加到您的课程中：

@RestController
@Validated
class Controller {
  // ...
}

更新：

您需要正确配置它.. 将此 bean 添加到您的上下文中：

@Bean
 public MethodValidationPostProcessor methodValidationPostProcessor() {
      return new MethodValidationPostProcessor();
 }

异常处理示例：

@ControllerAdvice
@Component
public class GlobalExceptionHandler {
    @ExceptionHandler
    @ResponseBody
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public Map handle(MethodArgumentNotValidException exception) {
        return error(exception.getBindingResult().getFieldErrors()
                .stream()
                .map(FieldError::getDefaultMessage)
                .collect(Collectors.toList()));
    }


    @ExceptionHandler
    @ResponseBody
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public Map handle(ConstraintViolationException exception) {
        return error(exception.getConstraintViolations()
                .stream()
                .map(ConstraintViolation::getMessage)
                .collect(Collectors.toList()));
    }

    private Map error(Object message) {
        return Collections.singletonMap("error", message);
    }
}