- 用到的工具 arthas
工具快速入门:https://arthas.aliyun.com/doc/quick-start.html - 详细步骤
Microsoft Windows [版本 10.0.22000.434]
(c) Microsoft Corporation。保留所有权利。
C:\WINDOWS\system32>cd /d D:\Users\uniz\Desktop\temp
D:\Users\uniz\Desktop\temp>java -jar arthas-boot.jar
[INFO] arthas-boot version: 3.5.3
[INFO] Found existing java process, please choose one and input the serial number of the process, eg : 1. Then hit ENTER.
* [1]: 17288 org.codehaus.plexus.classworlds.launcher.Launcher
1
[INFO] arthas home: C:\Users\uniz\.arthas\lib\3.5.5\arthas
[INFO] Try to attach process 17288
[INFO] Found java home from System Env JAVA_HOME: D:\FA\tools\Java\jdk1.7.0_80
[INFO] Attach process 17288 success.
[INFO] arthas-client connect 127.0.0.1 3658
,---. ,------. ,--------.,--. ,--. ,---. ,---.
/ O \ | .--. ''--. .--'| '--' | / O \ ' .-'
| .-. || '--'.' | | | .--. || .-. |`. `-.
| | | || |\ \ | | | | | || | | |.-' |
`--' `--'`--' '--' `--' `--' `--'`--' `--'`-----'
wiki https://arthas.aliyun.com/doc
tutorials https://arthas.aliyun.com/doc/arthas-tutorials.html
version 3.5.5
main_class
pid 17288
time 2022-01-24 17:34:39
[arthas@17288]$ sc com.sun.proxy.$Proxy91
com.sun.proxy.$Proxy91
Affect(row-cnt:1) cost in 53 ms.
[arthas@17288]$ jad com.sun.proxy.$Proxy91
ClassLoader:
ssRealm[plugin>org.codehaus.mojo:tomcat-maven-plugin:1.1, parent: sun.misc.Launcher$AppClassLoader@6521f956]
+-ClassRealm[plugin>org.codehaus.mojo:tomcat-maven-plugin:1.1, parent: sun.misc.Launcher$AppClassLoader@6521f956]
Location:
核心操作步骤：
1、进入arthas-boot.jar所在目录
cd /d D:\Users\uniz\Desktop\temp
2、启动arthas
java -jar arthas-boot.jar
3、启动后，选择java线程前面的序号，我这里只启动了一个java web项目，选择1，然后回车即可
4、debug 代码，获取类名
DemoService service = AppContext.getBean(DemoService.class);
System.out.println(service.getClass().getName());// com.sun.proxy.$Proxy91
5、查看jvm是否加载
sc com.sun.proxy.$Proxy91
6、反编译获取源码
jad com.sun.proxy.$Proxy91
反编译得到的java源码：
/*
* Decompiled with CFR.
*
* Could not load the following classes:
* com.uniz.manager.exceptions.ManagerException
* com.uniz.service.DemoService
* org.aopalliance.aop.Advice
* org.springframework.aop.Advisor
* org.springframework.aop.SpringProxy
* org.springframework.aop.TargetSource
* org.springframework.aop.framework.Advised
* org.springframework.aop.framework.AopConfigException
*/
package com.sun.proxy;
import com.uniz.manager.exceptions.ManagerException;
import com.uniz.service.DemoService;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.lang.reflect.UndeclaredThrowableException;
import org.aopalliance.aop.Advice;
import org.springframework.aop.Advisor;
import org.springframework.aop.SpringProxy;
import org.springframework.aop.TargetSource;
import org.springframework.aop.framework.Advised;
import org.springframework.aop.framework.AopConfigException;
public final class $Proxy91
extends Proxy
implements DemoService,
SpringProxy,
Advised {
private static Method m21;
private static Method m3;
private static Method m12;
private static Method m6;
private static Method m2;
private static Method m15;
private static Method m18;
private static Method m13;
private static Method m4;
private static Method m26;
private static Method m10;
private static Method m9;
private static Method m7;
private static Method m8;
private static Method m19;
private static Method m25;
private static Method m17;
private static Method m5;
private static Method m14;
private static Method m22;
private static Method m1;
private static Method m16;
private static Method m24;
private static Method m20;
private static Method m0;
private static Method m11;
private static Method m23;
public $Proxy91(InvocationHandler invocationHandler) {
super(invocationHandler);
}
static {
try {
m21 = Class.forName("org.springframework.aop.framework.Advised").getMethod("isPreFiltered", new Class[0]);
m3 = Class.forName("com.uniz.service.DemoService").getMethod("updateComments", Class.forName("java.lang.String"), Class.forName("java.lang.String"));
m12 = Class.forName("org.springframework.aop.framework.Advised").getMethod("isProxyTargetClass", new Class[0]);
m6 = Class.forName("org.springframework.aop.framework.Advised").getMethod("isFrozen", new Class[0]);
m2 = Class.forName("java.lang.Object").getMethod("toString", new Class[0]);
m15 = Class.forName("org.springframework.aop.framework.Advised").getMethod("removeAdvice", Class.forName("org.aopalliance.aop.Advice"));
m18 = Class.forName("org.springframework.aop.framework.Advised").getMethod("removeAdvisor", Class.forName("org.springframework.aop.Advisor"));
m13 = Class.forName("org.springframework.aop.framework.Advised").getMethod("setExposeProxy", Boolean.TYPE);
m4 = Class.forName("org.springframework.aop.framework.Advised").getMethod("indexOf", Class.forName("org.springframework.aop.Advisor"));
m26 = Class.forName("org.springframework.aop.framework.Advised").getMethod("getTargetClass", new Class[0]);
m10 = Class.forName("org.springframework.aop.framework.Advised").getMethod("getTargetSource", new Class[0]);
m9 = Class.forName("org.springframework.aop.framework.Advised").getMethod("addAdvisor", Integer.TYPE, Class.forName("org.springframework.aop.Advisor"));
m7 = Class.forName("org.springframework.aop.framework.Advised").getMethod("isExposeProxy", new Class[0]);
m8 = Class.forName("org.springframework.aop.framework.Advised").getMethod("addAdvisor", Class.forName("org.springframework.aop.Advisor"));
m19 = Class.forName("org.springframework.aop.framework.Advised").getMethod("addAdvice", Integer.TYPE, Class.forName("org.aopalliance.aop.Advice"));
m25 = Class.forName("org.springframework.aop.framework.Advised").getMethod("getProxiedInterfaces", new Class[0]);
m17 = Class.forName("org.springframework.aop.framework.Advised").getMethod("removeAdvisor", Integer.TYPE);
m5 = Class.forName("org.springframework.aop.framework.Advised").getMethod("indexOf", Class.forName("org.aopalliance.aop.Advice"));
m14 = Class.forName("org.springframework.aop.framework.Advised").getMethod("setPreFiltered", Boolean.TYPE);
m22 = Class.forName("org.springframework.aop.framework.Advised").getMethod("replaceAdvisor", Class.forName("org.springframework.aop.Advisor"), Class.forName("org.springframework.aop.Advisor"));
m1 = Class.forName("java.lang.Object").getMethod("equals", Class.forName("java.lang.Object"));
m16 = Class.forName("org.springframework.aop.framework.Advised").getMethod("getAdvisors", new Class[0]);
m24 = Class.forName("org.springframework.aop.framework.Advised").getMethod("isInterfaceProxied", Class.forName("java.lang.Class"));
m20 = Class.forName("org.springframework.aop.framework.Advised").getMethod("addAdvice", Class.forName("org.aopalliance.aop.Advice"));
m0 = Class.forName("java.lang.Object").getMethod("hashCode", new Class[0]);
m11 = Class.forName("org.springframework.aop.framework.Advised").getMethod("setTargetSource", Class.forName("org.springframework.aop.TargetSource"));
m23 = Class.forName("org.springframework.aop.framework.Advised").getMethod("toProxyConfigString", new Class[0]);
return;
}
catch (NoSuchMethodException noSuchMethodException) {
throw new NoSuchMethodError(noSuchMethodException.getMessage());
}
catch (ClassNotFoundException classNotFoundException) {
throw new NoClassDefFoundError(classNotFoundException.getMessage());
}
}
public final boolean equals(Object object) {
try {
return (Boolean)this.h.invoke(this, m1, new Object[]{object});
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final String toString() {
try {
return (String)this.h.invoke(this, m2, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final int hashCode() {
try {
return (Integer)this.h.invoke(this, m0, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final int indexOf(Advisor advisor) {
try {
return (Integer)this.h.invoke(this, m4, new Object[]{advisor});
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final int indexOf(Advice advice) {
try {
return (Integer)this.h.invoke(this, m5, new Object[]{advice});
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final boolean isFrozen() {
try {
return (Boolean)this.h.invoke(this, m6, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final boolean isExposeProxy() {
try {
return (Boolean)this.h.invoke(this, m7, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final void addAdvisor(int n, Advisor advisor) throws AopConfigException {
try {
this.h.invoke(this, m9, new Object[]{n, advisor});
return;
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final void addAdvisor(Advisor advisor) throws AopConfigException {
try {
this.h.invoke(this, m8, new Object[]{advisor});
return;
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final TargetSource getTargetSource() {
try {
return (TargetSource)this.h.invoke(this, m10, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final void setTargetSource(TargetSource targetSource) {
try {
this.h.invoke(this, m11, new Object[]{targetSource});
return;
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final boolean isProxyTargetClass() {
try {
return (Boolean)this.h.invoke(this, m12, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final void setExposeProxy(boolean bl) {
try {
this.h.invoke(this, m13, new Object[]{bl});
return;
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final void setPreFiltered(boolean bl) {
try {
this.h.invoke(this, m14, new Object[]{bl});
return;
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final Class getTargetClass() {
try {
return (Class)this.h.invoke(this, m26, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final boolean removeAdvice(Advice advice) {
try {
return (Boolean)this.h.invoke(this, m15, new Object[]{advice});
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final Advisor[] getAdvisors() {
try {
return (Advisor[])this.h.invoke(this, m16, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final void removeAdvisor(int n) throws AopConfigException {
try {
this.h.invoke(this, m17, new Object[]{n});
return;
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final boolean removeAdvisor(Advisor advisor) {
try {
return (Boolean)this.h.invoke(this, m18, new Object[]{advisor});
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final void addAdvice(Advice advice) throws AopConfigException {
try {
this.h.invoke(this, m20, new Object[]{advice});
return;
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final void addAdvice(int n, Advice advice) throws AopConfigException {
try {
this.h.invoke(this, m19, new Object[]{n, advice});
return;
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final boolean isPreFiltered() {
try {
return (Boolean)this.h.invoke(this, m21, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final boolean replaceAdvisor(Advisor advisor, Advisor advisor2) throws AopConfigException {
try {
return (Boolean)this.h.invoke(this, m22, new Object[]{advisor, advisor2});
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final String toProxyConfigString() {
try {
return (String)this.h.invoke(this, m23, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final boolean isInterfaceProxied(Class clazz) {
try {
return (Boolean)this.h.invoke(this, m24, new Object[]{clazz});
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final Class[] getProxiedInterfaces() {
try {
return (Class[])this.h.invoke(this, m25, null);
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
public final void updateComments(String string, String string2) throws ManagerException {
try {
this.h.invoke(this, m3, new Object[]{string, string2});
return;
}
catch (Error | RuntimeException throwable) {
throw throwable;
}
catch (Throwable throwable) {
throw new UndeclaredThrowableException(throwable);
}
}
}
原DemoService实现类源码
package com.uniz.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.mycim.dao.wip.lot.DemoDao;
@Service
@Transactional
public class DemoServiceImpl implements DemoService {
@Autowired
protected DemoDao dao;
@Override
public void updateComments(String id, String comments) {
dao.updateComments(id, comments);
}
}
注意：动态生成的代理类必须被jvm加载后才能通过sc命令查看到，也才能够用jad命令进行反编译。项目启动，代理类并未生成，也没有被jvm加载，可以先执行一下相关方法。
总结：从反编译源码可以看出，此处就是基于jdk的动态代理实现的