文章目錄

• • • • • • 1. 創(chuàng)建一個(gè)枚舉、封裝異常的錯(cuò)誤碼等信息
          • 2. 創(chuàng)建一個(gè)自定義異常類繼承RuntimeException。
          • 3. 自定義異常
          • 4. 拋出異常
          • 5. 測(cè)試

1. 創(chuàng)建一個(gè)枚舉、封裝異常的錯(cuò)誤碼等信息

package com.gblfy.distributedlimiter.enums;public enum ServiceErrCode {REQ_PARAM_ERR(10001, "您的手慢了，秒殺完畢！"),NOTFOUND_RESULT_ERR(10004, "服務(wù)器異常");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. 創(chuàng)建一個(gè)自定義異常類繼承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) {//構(gòu)造器的第二個(gè)參數(shù)是上面創(chuàng)建的那個(gè)枚舉，之后把枚舉里面定義的code給了這個(gè)codesuper(message);this.code = serviceErrCode.getCode();}public int getCode() {return code;}@Overridepublic String getMessage() {return super.getMessage();} }

3. 自定義異常

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;/*** 標(biāo)記這是一個(gè)異常處理類*/ @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. 拋出異常

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() {//如果超過(guò)流控管理的就拋出異常throw new BaseServiceException(ServiceErrCode.REQ_PARAM_ERR.getMsg(), ServiceErrCode.REQ_PARAM_ERR);} }

5. 測(cè)試

https://localhost:8080/excepton

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