mysql - 我无法使用 JAX-RS 处理异常

Question

这是 NullPointerExceptionMapper 类

package com.sample.Exceptionhandler;

import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;
import response.Message;

@Provider
public class NullPointerExceptionMapper implements ExceptionMapper<NullPointerException> {

    public Response toResponse(NullPointerException ex) {

        Message message=new Message(500,ex.getMessage(),200);
        return Response.status(Status.NOT_FOUND).entity(message)
                .build();
    }
}

这是消息类

package response;

public class Message {

    private int status;
    private String message;
    private int code;

    public Message() {
    }

    public Message(int status, String message, int code) {
        super();
        this.status = status;
        this.message = message;
        this.code = code;
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

这是 Controller 方法

@RequestMapping(value = "/getOrder", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public List<PurchaseOrderHeaderDto> getOrders(){
    String exceptionOccured="NULL_POINTER";
    if(exceptionOccured.equalsIgnoreCase("NULL_POINTER")){
        throw new NullPointerException("Null Pointer Exception");
    }
    return purchaseImpl.GetPurchaseOrder();
}

我无法处理抛出的异常，我正在使用 JAX-RS 来处理它，但它无法正常工作，欢迎任何建议来帮助我解决这个问题。

Answer 1

您正在将 JAX-RS 与 Spring MVC 混合。您的 Controller 代码是 Spring MVC，您尝试使用 ExceptionMapper 进行异常处理是 JAX-RS。这是两个完全不同且不兼容的框架。对于 Spring MVC，您想要使用 @ControllerAdvice类。