解決springboot全局異常處理與aop日志處理中@afterthrowing失效問(wèn)題的方法

本文講解"解決springboot全局異常處理與aop日志處理中@afterthrowing失效問(wèn)題的方法"，希望能夠解決相關(guān)問(wèn)題。

• 一、前言

• 二、問(wèn)題

• 三、失效場(chǎng)景

一、前言

• 在實(shí)際業(yè)務(wù)場(chǎng)景中，我們通常會(huì)使用全局異常處理機(jī)制，也就是在業(yè)務(wù)代碼發(fā)生異常的時(shí)候，攔截異常并進(jìn)行統(tǒng)一的處理，然后以json格式返回給前端。

• 同時(shí)我們也會(huì)使用aop進(jìn)行操作日志記錄，在不發(fā)生異常時(shí)，可以使用四種advice方式記錄操作日志：@before(“”)，@after(“”)、 @afterreturning(“”)、 @around(“”)。當(dāng)發(fā)生異常時(shí)，使用@afterthrowing(value = “”,throwing = “e”)進(jìn)行日志記錄。

二、問(wèn)題

同時(shí)使用上述兩種方式，可能出現(xiàn)某一種失效的場(chǎng)景。

三、失效場(chǎng)景

失效場(chǎng)景一： 如果采用前后端不分離架構(gòu)，采用下屬代碼返回前端響應(yīng)結(jié)果，如果統(tǒng)一異常處理執(zhí)行順序在@afterthrowing之前，就會(huì)出現(xiàn)@afterthrowing中不執(zhí)行情況。前后端分離架構(gòu)不會(huì)出現(xiàn)此問(wèn)題。

string?xrequestedwith?=?request.getheader("x-requested-with");
if?("xmlhttprequest".equals(xrequestedwith))?{
????response.setcontenttype("application/plain;charset=utf-8");
????printwriter?writer?=?response.getwriter();
????writer.write(communityutil.getjsonstring(1,?"服務(wù)器異常!"));
}?else?{
????response.sendredirect(request.getcontextpath()?+?"/error");
}

解決方案：讓aop日志處理類實(shí)現(xiàn)ordered 接口，并重寫(xiě)getorder()方法，使其返回值為1，返回值越小，執(zhí)行的順序越靠前，使其執(zhí)行順序優(yōu)先于全部異常處理類。

@component
@aspect
public?class?logaspecttest?implements?ordered?{
????@override
????public?int?getorder()?{
????????return?1;
????}
????????@afterthrowing(value?=?"pointcut()",throwing?=?"e")
????public?void?afterthrowing(joinpoint?joinpoint,exception?e){
????????string?classname?=?joinpoint.gettarget().getclass().getname();
????????string?methodname?=?joinpoint.getsignature().getname();
????????system.out.println("classname?is?:?"?+?classname?+?".?methodname?is?:?"?+?methodname);
????????system.out.println("afterthrowing?excute········"?+?e.getmessage());
????????e.printstacktrace();
????}
}

失效場(chǎng)景二：如果使用了 @around(“”)，在執(zhí)行 joinpoint.proceed()方法時(shí)，捕獲了異常，會(huì)導(dǎo)致全局異常處理無(wú)法收到異常，因此失效。

@around("pointcut()")
public?void?around(proceedingjoinpoint?joinpoint)?throws?throwable?{
????string?classname?=?joinpoint.gettarget().getclass().getname();
????string?methodname?=?joinpoint.getsignature().getname();
????system.out.println("classname?is?:?"?+?classname?+?".?methodname?is?:?"?+?methodname);
????system.out.println("around?excute?before?········");
????object?obj?=?null;
????try?{
????????obj?=?joinpoint.proceed();
????}?catch?(throwable?e)?{
????????system.out.println("我捕獲了異常");
????}
????system.out.println("obj?對(duì)象：?"?+?obj);
????system.out.println("around?excute?after?········");
}

解決方案：不要進(jìn)行異常捕獲，或者捕獲后重新拋出異常。

@around("pointcut()")
public?void?around(proceedingjoinpoint?joinpoint)?throws?throwable?{
????string?classname?=?joinpoint.gettarget().getclass().getname();
????string?methodname?=?joinpoint.getsignature().getname();
????system.out.println("classname?is?:?"?+?classname?+?".?methodname?is?:?"?+?methodname);
????system.out.println("around?excute?before?········");
????object?obj?=?null;
????try?{
????????obj?=?joinpoint.proceed();
????}?catch?(throwable?e)?{
????????system.out.println("我捕獲了異常");
????????throw?new?runtimeexception("執(zhí)行失敗",e);
????}
????system.out.println("obj?對(duì)象：?"?+?obj);
????system.out.println("around?excute?after?········");
}

4、測(cè)試全部代碼

package?com.nowcoder.community.aspect;
import?org.aspectj.lang.joinpoint;
import?org.aspectj.lang.proceedingjoinpoint;
import?org.aspectj.lang.annotation.*;
import?org.springframework.core.ordered;
import?org.springframework.stereotype.component;
import?org.springframework.web.context.request.requestattributes;
import?org.springframework.web.context.request.requestcontextholder;
import?org.springframework.web.context.request.servletrequestattributes;
/**
?*?@description?aop?日志記錄
?*/
@component
@aspect
public?class?logaspecttest?implements?ordered?{
????/**
?????*?定義執(zhí)行順序的優(yōu)先級(jí)，值越小，優(yōu)先級(jí)越高
?????*?@return
?????*/
????@override
????public?int?getorder()?{
????????return?1;
????}
????/**
?????*?定義切點(diǎn)（織入點(diǎn)）
?????*??execution(*?com.nowcoder.community.controller.*.*(..))
?????*??????-?第一個(gè)?*?表示?支持任意類型返回值的方法
?????*??????-?com.nowcoder.community.controller?表示這個(gè)包下的類
?????*??????-?第二個(gè)?*?表示?controller包下的任意類
?????*??????-?第三個(gè)?*?表示?類中的任意方法
?????*??????-?(..)?表示方法可以擁有任意參數(shù)
?????*???可以根據(jù)自己的需求替換。
?????*
?????*/
????@pointcut("execution(*?com.nowcoder.community.controller.*.*(..))")
????public?void?pointcut(){
????}
????/**
?????*?定義?advice?通知
?????*????-?1.?@before?目標(biāo)方法執(zhí)行之前
?????*????-?2.?@after??目標(biāo)方法執(zhí)行之后
?????*????-?3.?@afterreturning?目標(biāo)方法返回執(zhí)行結(jié)果之后
?????*????-?4.?@afterthrowing?目標(biāo)方法拋出異常后
?????*????-?5.?@around?可以使用proceedingjoinpoint?joinpoint，獲取目標(biāo)對(duì)象，通過(guò)動(dòng)態(tài)代理，代理目標(biāo)類執(zhí)行，在目標(biāo)對(duì)象執(zhí)行前后均可
?????*/
????@before("pointcut()")
????public?void?before(joinpoint?joinpoint){
????????string?classname?=?joinpoint.gettarget().getclass().getname();
????????string?methodname?=?joinpoint.getsignature().getname();
????????servletrequestattributes?attributes?=?(servletrequestattributes)requestcontextholder.getrequestattributes();
????????if?(attributes?==?null){
????????????return;
????????}
????????//?請(qǐng)求ip
????????string?ip?=?attributes.getrequest().getremotehost();
????????//?請(qǐng)求路徑
????????string?requesturi?=?attributes.getrequest().getrequesturi();
????????//?請(qǐng)求方法
????????string?requestmethod?=?attributes.getrequest().getmethod();
????????system.out.println(string.format("用戶：?[%s]?的請(qǐng)求路徑為：[%s],?請(qǐng)求方式為：?[%s],請(qǐng)求類名為：?[%s],?請(qǐng)求方法名為：?[%s]",?ip,requesturi,
????????????????requestmethod,classname,methodname));
????????system.out.println("before?excute········");
????}
????@after("pointcut()")
????public?void?after(joinpoint?joinpoint){
????????string?classname?=?joinpoint.gettarget().getclass().getname();
????????string?methodname?=?joinpoint.getsignature().getname();
????????servletrequestattributes?attributes?=?(servletrequestattributes)requestcontextholder.getrequestattributes();
????????if?(attributes?==?null){
????????????return;
????????}
????????//?請(qǐng)求ip
????????string?ip?=?attributes.getrequest().getremotehost();
????????//?請(qǐng)求路徑
????????string?requesturi?=?attributes.getrequest().getrequesturi();
????????//?請(qǐng)求方法
????????string?requestmethod?=?attributes.getrequest().getmethod();
????????system.out.println(string.format("用戶：?[%s]?的請(qǐng)求路徑為：[%s],?請(qǐng)求方式為：?[%s],請(qǐng)求類名為：?[%s],?請(qǐng)求方法名為：?[%s]",?ip,requesturi,
?????????????????????????????????????????requestmethod,classname,methodname));
????????system.out.println("after?excute········");
????}
????@afterreturning("pointcut()")
????public?void?afterreturning(joinpoint?joinpoint){
????????string?classname?=?joinpoint.gettarget().getclass().getname();
????????string?methodname?=?joinpoint.getsignature().getname();
????????servletrequestattributes?attributes?=?(servletrequestattributes)requestcontextholder.getrequestattributes();
????????if?(attributes?==?null){
????????????return;
????????}
????????//?請(qǐng)求ip
????????string?ip?=?attributes.getrequest().getremotehost();
????????//?請(qǐng)求路徑
????????string?requesturi?=?attributes.getrequest().getrequesturi();
????????//?請(qǐng)求方法
????????string?requestmethod?=?attributes.getrequest().getmethod();
????????system.out.println(string.format("用戶：?[%s]?的請(qǐng)求路徑為：[%s],?請(qǐng)求方式為：?[%s],請(qǐng)求類名為：?[%s],?請(qǐng)求方法名為：?[%s]",?ip,requesturi,
?????????????????????????????????????????requestmethod,classname,methodname));
????????system.out.println("afterreturning?excute········");
????}
????@afterthrowing(value?=?"pointcut()",throwing?=?"e")
????public?void?afterthrowing(joinpoint?joinpoint,exception?e){
????????string?classname?=?joinpoint.gettarget().getclass().getname();
????????string?methodname?=?joinpoint.getsignature().getname();
????????servletrequestattributes?attributes?=?(servletrequestattributes)requestcontextholder.getrequestattributes();
????????if?(attributes?==?null){
????????????return;
????????}
????????//?請(qǐng)求ip
????????string?ip?=?attributes.getrequest().getremotehost();
????????//?請(qǐng)求路徑
????????string?requesturi?=?attributes.getrequest().getrequesturi();
????????//?請(qǐng)求方法
????????string?requestmethod?=?attributes.getrequest().getmethod();
????????system.out.println(string.format("用戶：?[%s]?的請(qǐng)求路徑為：[%s],?請(qǐng)求方式為：?[%s],請(qǐng)求類名為：?[%s],?請(qǐng)求方法名為：?[%s],請(qǐng)求失敗原因：?[%s]",?ip,
?????????????????????????????????????????requesturi,?requestmethod,classname,methodname,e.getmessage()+e.getcause()));
????????system.out.println("afterthrowing?excute········"?+?e.getmessage());
????????e.printstacktrace();
????}
????@around("pointcut()")
????public?void?around(proceedingjoinpoint?joinpoint)?throws?throwable?{
????????string?classname?=?joinpoint.gettarget().getclass().getname();
????????string?methodname?=?joinpoint.getsignature().getname();
????????system.out.println("classname?is?:?"?+?classname?+?".?methodname?is?:?"?+?methodname);
????????servletrequestattributes?attributes?=?(servletrequestattributes)requestcontextholder.getrequestattributes();
????????if?(attributes?==?null){
????????????return;
????????}
????????//?請(qǐng)求ip
????????string?ip?=?attributes.getrequest().getremotehost();
????????//?請(qǐng)求路徑
????????string?requesturi?=?attributes.getrequest().getrequesturi();
????????//?請(qǐng)求方法
????????string?requestmethod?=?attributes.getrequest().getmethod();
????????system.out.println(string.format("用戶：?[%s]?的請(qǐng)求路徑為：[%s],?請(qǐng)求方式為：?[%s],請(qǐng)求類名為：?[%s],?請(qǐng)求方法名為：?[%s]",?ip,requesturi,
?????????????????????????????????????????requestmethod,classname,methodname));
????????object?obj?=?null;
????????try?{
????????????obj?=?joinpoint.proceed();
????????}?catch?(throwable?e)?{
????????????system.out.println("我捕獲了異常");
????????????throw?new?runtimeexception("執(zhí)行失敗",e);
????????}
????????system.out.println(string.format("用戶：?[%s]?的請(qǐng)求路徑為：[%s],?請(qǐng)求方式為：?[%s],請(qǐng)求類名為：?[%s],?請(qǐng)求方法名為：?[%s]",?ip,requesturi,
?????????????????????????????????????????requestmethod,classname,methodname));
????????system.out.println("around?excute?after?········");
????}
}

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