統(tǒng)一處理 try...catch 這么香,求求你不要再滿屏寫了,再發(fā)現(xiàn)扣績效!
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責(zé)編：樂樂?|?來自：小李子說程序
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前言
軟件開發(fā)springboot項(xiàng)目過程中，不可避免的需要處理各種異常,spring mvc 架構(gòu)中各層會(huì)出現(xiàn)大量的try {...} catch {...} finally {...}代碼塊，不僅有大量的冗余代碼，而且還影響代碼的可讀性。這樣就需要定義個(gè)全局統(tǒng)一異常處理器，以便業(yè)務(wù)層再也不必處理異常。
推薦理由
代碼復(fù)制到項(xiàng)目中通過簡單的配置即可實(shí)現(xiàn)
可以靈活的根據(jù)自己的業(yè)務(wù)異常進(jìn)行更細(xì)粒度的擴(kuò)展
實(shí)踐
1 封裝統(tǒng)一返回結(jié)果類
源代碼
public?class?AjaxResult?{
?//是否成功
????private?Boolean?success;
????//狀態(tài)碼
????private?Integer?code;
????//提示信息
????private?String?msg;
????//數(shù)據(jù)
????private?Object?data;
????public?AjaxResult()?{
????}
????//自定義返回結(jié)果的構(gòu)造方法
????public?AjaxResult(Boolean?success,Integer?code,?String?msg,Object?data)?{
????????this.success?=?success;
????????this.code?=?code;
????????this.msg?=?msg;
????????this.data?=?data;
????}
????//自定義異常返回的結(jié)果
????public?static?AjaxResult?defineError(BusinessException?de){
?????AjaxResult?result?=?new?AjaxResult();
????????result.setSuccess(false);
????????result.setCode(de.getErrorCode());
????????result.setMsg(de.getErrorMsg());
????????result.setData(null);
????????return?result;
????}
????//其他異常處理方法返回的結(jié)果
????public?static?AjaxResult?otherError(ErrorEnum?errorEnum){
?????AjaxResult?result?=?new?AjaxResult();
????????result.setMsg(errorEnum.getErrorMsg());
????????result.setCode(errorEnum.getErrorCode());
????????result.setSuccess(false);
????????result.setData(null);
????????return?result;
????}
?public?Boolean?getSuccess()?{
??return?success;
?}
?public?void?setSuccess(Boolean?success)?{
??this.success?=?success;
?}
?public?Integer?getCode()?{
??return?code;
?}
?public?void?setCode(Integer?code)?{
??this.code?=?code;
?}
?public?String?getMsg()?{
??return?msg;
?}
?public?void?setMsg(String?msg)?{
??this.msg?=?msg;
?}
?public?Object?getData()?{
??return?data;
?}
?public?void?setData(Object?data)?{
??this.data?=?data;
?}
????
}
2 自定義異常封裝類
源碼：
public?class?BusinessException?extends?RuntimeException?{
?private?static?final?long?serialVersionUID?=?1L;
?/**
??*?錯(cuò)誤狀態(tài)碼
??*/
?protected?Integer?errorCode;
?/**
??*?錯(cuò)誤提示
??*/
?protected?String?errorMsg;
?public?BusinessException(){
?????}
?public?BusinessException(Integer?errorCode,?String?errorMsg)?{
?????????this.errorCode?=?errorCode;
?????????this.errorMsg?=?errorMsg;
?????}
?public?Integer?getErrorCode()?{
??return?errorCode;
?}
?public?void?setErrorCode(Integer?errorCode)?{
??this.errorCode?=?errorCode;
?}
?public?String?getErrorMsg()?{
??return?errorMsg;
?}
?public?void?setErrorMsg(String?errorMsg)?{
??this.errorMsg?=?errorMsg;
?}
}
3 錯(cuò)誤枚舉，拒絕硬編碼
源碼
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public?enum?ErrorEnum?{
?//?數(shù)據(jù)操作錯(cuò)誤定義
?SUCCESS(200,?"成功"),
?NO_PERMISSION(403,"你沒得權(quán)限"),
?NO_AUTH(401,"未登錄"),
?NOT_FOUND(404,?"未找到該資源!"),
?INTERNAL_SERVER_ERROR(500,?"服務(wù)器異常請(qǐng)聯(lián)系管理員"),
?;
?/**?錯(cuò)誤碼?*/
?private?Integer?errorCode;
?/**?錯(cuò)誤信息?*/
?private?String?errorMsg;
?ErrorEnum(Integer?errorCode,?String?errorMsg)?{
??this.errorCode?=?errorCode;
??this.errorMsg?=?errorMsg;
?}
????public?Integer?getErrorCode()?{
????????return?errorCode;
????}
????public?String?getErrorMsg()?{
????????return?errorMsg;
????}
}
4 全局異常處理類
源碼
/**
?*?全局異常處理器
?*?
?*/
@RestControllerAdvice
public?class?GlobalExceptionHandler
{
????private?static?final?Logger?log?=?LoggerFactory.getLogger(GlobalExceptionHandler.class);
????/**
?????*?處理自定義異常
?????*
?????*/
????@ExceptionHandler(value?=?BusinessException.class)
????public?AjaxResult?bizExceptionHandler(BusinessException?e)?{
?????log.error(e.getMessage(),?e);
????????return?AjaxResult.defineError(e);
????}
????/**
?????*處理其他異常
?????*
?????*/
????@ExceptionHandler(value?=?Exception.class)
????public?AjaxResult?exceptionHandler(?Exception?e)?{
??????log.error(e.getMessage(),?e);
????????return?AjaxResult.otherError(ErrorEnum.INTERNAL_SERVER_ERROR);
???????
????}
}
5 測(cè)試
返回結(jié)果：
—?完?—
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