Springboot全局异常统一处理返回json

文章目录

• ​​1. 创建一个枚举、封装异常的错误码等信息​​
• ​​2. 创建一个自定义异常类继承RuntimeException。​​
• ​​3. 自定义异常​​
• ​​4. 抛出异常​​
• ​​5. 测试​​

1. 创建一个枚举、封装异常的错误码等信息

package com.gblfy.distributedlimiter.enums;

public enum ServiceErrCode {

    REQ_PARAM_ERR(10001, "您的手慢了，秒杀完毕！"),
    NOTFOUND_RESULT_ERR(10004, "服务器异常");

    private int code;
    private String msg;

    ServiceErrCode(int code, String msg) {
        this.code = code;
        this.msg = msg;

    }

    public int getCode() {
        return code;
    }

    public String getMsg() {
        return msg;
    }
}

2. 创建一个自定义异常类继承RuntimeException。

package com.gblfy.distributedlimiter.exception;

import com.gblfy.distributedlimiter.enums.ServiceErrCode;

public class BaseServiceException extends RuntimeException {

    private int code;

    public BaseServiceException(String message, ServiceErrCode serviceErrCode) {//构造器的第二个参数是上面创建的那个枚举，之后把枚举里面定义的code给了这个code
        super(message);
        this.code = serviceErrCode.getCode();
    }

    public int getCode() {
        return code;
    }

    @Override
    public String getMessage() {
        return super.getMessage();
    }
}

3. 自定义异常

package com.gblfy.distributedlimiter.exception;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.gblfy.distributedlimiter.exception.BaseServiceException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import javax.annotation.Resource;

/**
 * 标记这是一个异常处理类
 */
@RestControllerAdvice
public class CustomExtHandler {

    @Resource
    private ObjectMapper jsonMapper;

    @ExceptionHandler(BaseServiceException.class)
    public ObjectNode baseServiceException(BaseServiceException e){
        int code = e.getCode();
        String msg = e.getMessage();
        return jsonMapper.createObjectNode().put("code",code).put("msg",msg);
    }
}

4. 抛出异常

package com.gblfy.distributedlimiter.controller;

import com.gblfy.distributedlimiter.enums.ServiceErrCode;
import com.gblfy.distributedlimiter.exception.BaseServiceException;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class SentinelLimiterController {

    @GetMapping("/excepton")
    public void exceptonHandle() {
        //如果超过流控管理的就抛出异常
        throw new BaseServiceException(ServiceErrCode.REQ_PARAM_ERR.getMsg(), ServiceErrCode.REQ_PARAM_ERR);
    }
}

5. 测试

https://localhost:8080/excepton