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codesuper(message);this.code = serviceErrCode.getCode();}public int getCode() {return code;}@Overridepublic 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 {@Resourceprivate 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);}
}