如何解决如何为枚举关闭反序列化
对于具体的枚举,我想关闭反序列化。有可能吗?
运动模型课:
package main.exercise;
import lombok.*;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
@AllArgsConstructor
@NoArgsConstructor
@Getter
@Entity
@Builder
public class Exercise {
@Id
@GeneratedValue
private int id;
@NonNull
private String name;
@NonNull
private ExerciseType exerciseType;
private double caloriesBurned;
private String exerciseDescription;
}
我在控制器中有方法:
@PostMapping("/addExercise")
public List<String> addExercise(@RequestBody Exercise exercise) {
return exerciseCrudActivitiesService.addExercise(exercise);
}
需要运动主体,并且如果运动类型错误,则在POST http请求时出现错误:
Resolved [org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize value of type `main.exercise.ExerciseType` from String "CARdDIO": not one of the values accepted for Enum class: [CARDIO,WEIGHTLIFTING]; nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `main.exercise.ExerciseType` from String "CARdDIO": not one of the values accepted for Enum class: [CARDIO,WEIGHTLIFTING]
at [Source: (PushbackInputStream); line: 4,column: 25] (through reference chain: main.exercise.Exercise["exerciseType"])]
我得到了验证器,这是有用的,它验证枚举类型是对还是错,并将字符串从所有验证器返回到错误列表。不幸的是,由于错误而无法访问此代码。
public List<String> addExercise(Exercise exercise) {
ExerciseValidator validator = new ExerciseValidator();
List<String> messages = validator.validate(exercise);
if (messages.isEmpty()) {
exerciseRepository.save(exercise);
}
return messages;
}
验证者
package main.exercise.validator.attributesvalidators;
import main.exercise.Exercise;
import main.exercise.ExerciseType;
import main.exercise.validator.ExerciseAttributesValidator;
import java.util.InputMismatchException;
public class ExerciseTypeValidator implements ExerciseAttributesValidator {
@Override
public String validate(Exercise exercise) {
if (exercise.getExerciseType() == null) {
return "You didn't put exercise type!";
}
try {
ExerciseType.forName(exercise.getExerciseType().name());
} catch (InputMismatchException e) {
return "Wrong exercise type!";
}
return null;
}
}
解决方法
要关闭(反序列化),可以将@JsonIgnore
添加到exerciseType
字段中。但是,我认为这不会对您有任何帮助。
如果忽略序列化,则该字段将始终为null
,这不是预期的行为。
您的验证者为时已晚。注意:validate方法将Exercise
对象作为参数。在创建该对象的过程中已经发生了问题。
当您到达执行行ExerciseType.forName(exercise.getExerciseType().name());
的地步时,它将永远不会引发异常,因为getExerciseType()
已经是有效的枚举。
您可以使用Spring @ControllerAdvice
代替该自定义验证器为该错误类型注册自己的Exception处理程序。
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.context.request.WebRequest;
import com.fasterxml.jackson.databind.exc.InvalidFormatException
@ControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(InvalidFormatException.class)
public ResponseEntity<?> badFormatException(InvalidFormatException ex,WebRequest request) {
ErrorDetails errorDetails = new ErrorDetails(new Date(),ex.getMessage(),request.getDescription(false));
return new ResponseEntity<>(errorDetails,HttpStatus.BAD_REQUEST);
}
}
例如参见https://www.springboottutorial.com/spring-boot-exception-handling-for-rest-services了解更多详情。
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