标签：var1 CGLIB var10000 Object 代理 public cglib java final

cglib使用

1.引入依赖

     <!-- 添加cglib依赖 -->
            <dependency>
                <groupId>cglib</groupId>
                <artifactId>cglib</artifactId>
                <version>3.3.0</version>
            </dependency>

2.创建被代理类

public interface TestTransactionDao {
    public void processStudent();

    public void processStudent2();
}

public class TestTransactionDaoImpl implements TestTransactionDao {


    @Override
    public void processStudent() {

    }

    @Override
    public void processStudent2() {
        
    }
}

增强实现

public class ProcessStudentHandle implements MethodInterceptor {

    @Override
    public Object intercept(Object o, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {
        System.out.println("Before method: " + method.getName());
        Object result = methodProxy.invokeSuper(o, args);
        System.out.println("After method: " + method.getName());
        return result;
    }
}

3.cglib生成代理

  public static void main(String[] args) {
        //将cglib动态生成的class输出到项目根目录
        System.setProperty(DebuggingClassWriter.DEBUG_LOCATION_PROPERTY, "./cglib");
        Enhancer enhancer = new Enhancer();
        enhancer.setSuperclass(TestTransactionDaoImpl.class);
        enhancer.setCallback(new ProcessStudentHandle());
        TestTransactionDao dao = (TestTransactionDao) enhancer.create();
        dao.processStudent();
    }

5.使用在线反编译

https://jdec.app

6.动态生成的源码

/* Decompiler 2161ms, total 3467ms, lines 283 */
package com.example.sampleaop.dao;

import java.lang.reflect.Method;
import net.sf.cglib.core.ReflectUtils;
import net.sf.cglib.core.Signature;
import net.sf.cglib.proxy.Callback;
import net.sf.cglib.proxy.Factory;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

//通过继承实现
public class TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7 extends TestTransactionDaoImpl implements Factory {
   private boolean CGLIB$BOUND;
   public static Object CGLIB$FACTORY_DATA;
   private static final ThreadLocal CGLIB$THREAD_CALLBACKS;
   private static final Callback[] CGLIB$STATIC_CALLBACKS;
   //自定义增强实现
   private MethodInterceptor CGLIB$CALLBACK_0;
   private static Object CGLIB$CALLBACK_FILTER;
   private static final Method CGLIB$processStudent2$0$Method;
   private static final MethodProxy CGLIB$processStudent2$0$Proxy;
   private static final Object[] CGLIB$emptyArgs;
   private static final Method CGLIB$processStudent$1$Method;
   private static final MethodProxy CGLIB$processStudent$1$Proxy;
   private static final Method CGLIB$equals$2$Method;
   private static final MethodProxy CGLIB$equals$2$Proxy;
   private static final Method CGLIB$toString$3$Method;
   private static final MethodProxy CGLIB$toString$3$Proxy;
   private static final Method CGLIB$hashCode$4$Method;
   private static final MethodProxy CGLIB$hashCode$4$Proxy;
   private static final Method CGLIB$clone$5$Method;
   private static final MethodProxy CGLIB$clone$5$Proxy;

   static void CGLIB$STATICHOOK1() {
      CGLIB$THREAD_CALLBACKS = new ThreadLocal();
      CGLIB$emptyArgs = new Object[0];
      Class var0 = Class.forName("com.example.sampleaop.dao.TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7");
      Class var1;
      //objct的基础方法
      Method[] var10000 = ReflectUtils.findMethods(new String[]{"equals", "(Ljava/lang/Object;)Z", "toString", "()Ljava/lang/String;", "hashCode", "()I", "clone", "()Ljava/lang/Object;"}, (var1 = Class.forName("java.lang.Object")).getDeclaredMethods());
      CGLIB$equals$2$Method = var10000[0];
      CGLIB$equals$2$Proxy = MethodProxy.create(var1, var0, "(Ljava/lang/Object;)Z", "equals", "CGLIB$equals$2");
      CGLIB$toString$3$Method = var10000[1];
      CGLIB$toString$3$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/String;", "toString", "CGLIB$toString$3");
      CGLIB$hashCode$4$Method = var10000[2];
      CGLIB$hashCode$4$Proxy = MethodProxy.create(var1, var0, "()I", "hashCode", "CGLIB$hashCode$4");
      CGLIB$clone$5$Method = var10000[3];
      CGLIB$clone$5$Proxy = MethodProxy.create(var1, var0, "()Ljava/lang/Object;", "clone", "CGLIB$clone$5");
      //被代理类的方法
      var10000 = ReflectUtils.findMethods(new String[]{"processStudent2", "()V", "processStudent", "()V"}, (var1 = Class.forName("com.example.sampleaop.dao.TestTransactionDaoImpl")).getDeclaredMethods());
      CGLIB$processStudent2$0$Method = var10000[0];
      CGLIB$processStudent2$0$Proxy = MethodProxy.create(var1, var0, "()V", "processStudent2", "CGLIB$processStudent2$0");
      CGLIB$processStudent$1$Method = var10000[1];
      CGLIB$processStudent$1$Proxy = MethodProxy.create(var1, var0, "()V", "processStudent", "CGLIB$processStudent$1");
   }

   final void CGLIB$processStudent2$0() {
      super.processStudent2();
   }

   public final void processStudent2() {
      MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
      if (var10000 == null) {
         CGLIB$BIND_CALLBACKS(this);
         var10000 = this.CGLIB$CALLBACK_0;
      }

      if (var10000 != null) {
         //调用我们的增强实现 传入
         var10000.intercept(this, CGLIB$processStudent2$0$Method, CGLIB$emptyArgs, CGLIB$processStudent2$0$Proxy);
      } else {
         super.processStudent2();
      }
   }

   final void CGLIB$processStudent$1() {
      super.processStudent();
   }

   public final void processStudent() {
      MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
      if (var10000 == null) {
         CGLIB$BIND_CALLBACKS(this);
         var10000 = this.CGLIB$CALLBACK_0;
      }

      if (var10000 != null) {
         var10000.intercept(this, CGLIB$processStudent$1$Method, CGLIB$emptyArgs, CGLIB$processStudent$1$Proxy);
      } else {
         super.processStudent();
      }
   }

   final boolean CGLIB$equals$2(Object var1) {
      return super.equals(var1);
   }

   public final boolean equals(Object var1) {
      MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
      if (var10000 == null) {
         CGLIB$BIND_CALLBACKS(this);
         var10000 = this.CGLIB$CALLBACK_0;
      }

      if (var10000 != null) {
         Object var2 = var10000.intercept(this, CGLIB$equals$2$Method, new Object[]{var1}, CGLIB$equals$2$Proxy);
         return var2 == null ? false : (Boolean)var2;
      } else {
         return super.equals(var1);
      }
   }

   final String CGLIB$toString$3() {
      return super.toString();
   }

   public final String toString() {
      MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
      if (var10000 == null) {
         CGLIB$BIND_CALLBACKS(this);
         var10000 = this.CGLIB$CALLBACK_0;
      }

      return var10000 != null ? (String)var10000.intercept(this, CGLIB$toString$3$Method, CGLIB$emptyArgs, CGLIB$toString$3$Proxy) : super.toString();
   }

   final int CGLIB$hashCode$4() {
      return super.hashCode();
   }

   public final int hashCode() {
      MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
      if (var10000 == null) {
         CGLIB$BIND_CALLBACKS(this);
         var10000 = this.CGLIB$CALLBACK_0;
      }

      if (var10000 != null) {
         Object var1 = var10000.intercept(this, CGLIB$hashCode$4$Method, CGLIB$emptyArgs, CGLIB$hashCode$4$Proxy);
         return var1 == null ? 0 : ((Number)var1).intValue();
      } else {
         return super.hashCode();
      }
   }

   final Object CGLIB$clone$5() throws CloneNotSupportedException {
      return super.clone();
   }

   protected final Object clone() throws CloneNotSupportedException {
      MethodInterceptor var10000 = this.CGLIB$CALLBACK_0;
      if (var10000 == null) {
         CGLIB$BIND_CALLBACKS(this);
         var10000 = this.CGLIB$CALLBACK_0;
      }

      return var10000 != null ? var10000.intercept(this, CGLIB$clone$5$Method, CGLIB$emptyArgs, CGLIB$clone$5$Proxy) : super.clone();
   }

   public static MethodProxy CGLIB$findMethodProxy(Signature var0) {
      String var10000 = var0.toString();
      switch(var10000.hashCode()) {
      case -1229936855:
         if (var10000.equals("processStudent()V")) {
            return CGLIB$processStudent$1$Proxy;
         }
         break;
      case -508378822:
         if (var10000.equals("clone()Ljava/lang/Object;")) {
            return CGLIB$clone$5$Proxy;
         }
         break;
      case 526958799:
         if (var10000.equals("processStudent2()V")) {
            return CGLIB$processStudent2$0$Proxy;
         }
         break;
      case 1826985398:
         if (var10000.equals("equals(Ljava/lang/Object;)Z")) {
            return CGLIB$equals$2$Proxy;
         }
         break;
      case 1913648695:
         if (var10000.equals("toString()Ljava/lang/String;")) {
            return CGLIB$toString$3$Proxy;
         }
         break;
      case 1984935277:
         if (var10000.equals("hashCode()I")) {
            return CGLIB$hashCode$4$Proxy;
         }
      }

      return null;
   }

   public TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7() {
      CGLIB$BIND_CALLBACKS(this);
   }

   public static void CGLIB$SET_THREAD_CALLBACKS(Callback[] var0) {
      CGLIB$THREAD_CALLBACKS.set(var0);
   }

   public static void CGLIB$SET_STATIC_CALLBACKS(Callback[] var0) {
      CGLIB$STATIC_CALLBACKS = var0;
   }

   private static final void CGLIB$BIND_CALLBACKS(Object var0) {
      TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7 var1 = (TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7)var0;
      if (!var1.CGLIB$BOUND) {
         var1.CGLIB$BOUND = true;
         Object var10000 = CGLIB$THREAD_CALLBACKS.get();
         if (var10000 == null) {
            var10000 = CGLIB$STATIC_CALLBACKS;
            if (var10000 == null) {
               return;
            }
         }

         var1.CGLIB$CALLBACK_0 = (MethodInterceptor)((Callback[])var10000)[0];
      }

   }

   public Object newInstance(Callback[] var1) {
      CGLIB$SET_THREAD_CALLBACKS(var1);
      TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7 var10000 = new TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7();
      CGLIB$SET_THREAD_CALLBACKS((Callback[])null);
      return var10000;
   }

   public Object newInstance(Callback var1) {
      CGLIB$SET_THREAD_CALLBACKS(new Callback[]{var1});
      TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7 var10000 = new TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7();
      CGLIB$SET_THREAD_CALLBACKS((Callback[])null);
      return var10000;
   }

   public Object newInstance(Class[] var1, Object[] var2, Callback[] var3) {
      CGLIB$SET_THREAD_CALLBACKS(var3);
      TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7 var10000 = new TestTransactionDaoImpl$$EnhancerByCGLIB$$b6b704c7;
      switch(var1.length) {
      case 0:
         var10000.<init>();
         CGLIB$SET_THREAD_CALLBACKS((Callback[])null);
         return var10000;
      default:
         throw new IllegalArgumentException("Constructor not found");
      }
   }

   public Callback getCallback(int var1) {
      CGLIB$BIND_CALLBACKS(this);
      MethodInterceptor var10000;
      switch(var1) {
      case 0:
         var10000 = this.CGLIB$CALLBACK_0;
         break;
      default:
         var10000 = null;
      }

      return var10000;
   }

   public void setCallback(int var1, Callback var2) {
      switch(var1) {
      case 0:
         this.CGLIB$CALLBACK_0 = (MethodInterceptor)var2;
      default:
      }
   }

   public Callback[] getCallbacks() {
      CGLIB$BIND_CALLBACKS(this);
      return new Callback[]{this.CGLIB$CALLBACK_0};
   }

   public void setCallbacks(Callback[] var1) {
      this.CGLIB$CALLBACK_0 = (MethodInterceptor)var1[0];
   }

   static {
      CGLIB$STATICHOOK1();
   }
}

标签：var1,CGLIB,var10000,Object,代理,public,cglib,java,final
From： https://www.cnblogs.com/LQBlog/p/18317130

java-cglib动态代理原理

cglib使用

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