Java 将代理类序列化为文件
我有一个代理（作为JDKProxy或CGLIB生成），它是在JVM运行时生成的。我想知道是否有办法将这个类的内容（看起来像com.sun.proxy$Proxy123.class）写入一个文件，这样我就可以使用类似JDEclipse的反编译器来查看生成的代码类型。由于该类存在于JVM中，我想知道是否有一种方法可以让类加载器向实际的类提供一个InputStream/URL，然后可以使用该类将内容写入磁盘，并且可以使用jd eclipse或javap读取磁盘上的该文件。我知道这不是一个生产用例，但我很想看看这个动态生成的类的内容 谢谢 您可以使用重新传输功能，并请求代理类的重新传输。然后，在transformer中，您可以使用组成类的字节数组。将数组保存到类文件后，只需返回未经修改的数组，即可让JVM不受影响地继续运行 但我不确定你对这些课程的期望是什么。它们是直接实现的，不会带来任何意外。下面是在使用Oracle的jdk1.7.0\U 40生成的Java 将代理类序列化为文件,java,proxy-classes,cglib,Java,Proxy Classes,Cglib,我有一个代理（作为JDKProxy或CGLIB生成），它是在JVM运行时生成的。我想知道是否有办法将这个类的内容（看起来像com.sun.proxy$Proxy123.class）写入一个文件，这样我就可以使用类似JDEclipse的反编译器来查看生成的代码类型。由于该类存在于JVM中，我想知道是否有一种方法可以让类加载器向实际的类提供一个InputStream/URL，然后可以使用该类将内容写入磁盘，并且可以使用jd eclipse或javap读取磁盘上的该文件。我知道这不是一个生产用例，但我
java.lang.Runnable代理javappublic final class com.sun.proxy.$Proxy0 extends java.lang.reflect.Proxy implements java.lang.Runnable {
private static java.lang.reflect.Method m1;
private static java.lang.reflect.Method m3;
private static java.lang.reflect.Method m0;
private static java.lang.reflect.Method m2;
public com.sun.proxy.$Proxy0(java.lang.reflect.InvocationHandler);
Code:
0: aload_0
1: aload_1
2: invokespecial #8 // Method java/lang/reflect/Proxy."<init>":(Ljava/lang/reflect/InvocationHandler;)V
5: return
public final int hashCode();
Code:
0: aload_0
1: getfield #16 // Field java/lang/reflect/Proxy.h:Ljava/lang/reflect/InvocationHandler;
4: aload_0
5: getstatic #55 // Field m0:Ljava/lang/reflect/Method;
8: aconst_null
9: invokeinterface #28, 4 // InterfaceMethod java/lang/reflect/InvocationHandler.invoke:(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;
14: checkcast #57 // class java/lang/Integer
17: invokevirtual #60 // Method java/lang/Integer.intValue:()I
20: ireturn
21: athrow
22: astore_1
23: new #42 // class java/lang/reflect/UndeclaredThrowableException
26: dup
27: aload_1
28: invokespecial #45 // Method java/lang/reflect/UndeclaredThrowableException."<init>":(Ljava/lang/Throwable;)V
31: athrow
Exception table:
from to target type
0 21 21 Class java/lang/Error
0 21 21 Class java/lang/RuntimeException
0 21 22 Class java/lang/Throwable
public final boolean equals(java.lang.Object);
Code:
0: aload_0
1: getfield #16 // Field java/lang/reflect/Proxy.h:Ljava/lang/reflect/InvocationHandler;
4: aload_0
5: getstatic #20 // Field m1:Ljava/lang/reflect/Method;
8: iconst_1
9: anewarray #22 // class java/lang/Object
12: dup
13: iconst_0
14: aload_1
15: aastore
16: invokeinterface #28, 4 // InterfaceMethod java/lang/reflect/InvocationHandler.invoke:(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;
21: checkcast #30 // class java/lang/Boolean
24: invokevirtual #34 // Method java/lang/Boolean.booleanValue:()Z
27: ireturn
28: athrow
29: astore_2
30: new #42 // class java/lang/reflect/UndeclaredThrowableException
33: dup
34: aload_2
35: invokespecial #45 // Method java/lang/reflect/UndeclaredThrowableException."<init>":(Ljava/lang/Throwable;)V
38: athrow
Exception table:
from to target type
0 28 28 Class java/lang/Error
0 28 28 Class java/lang/RuntimeException
0 28 29 Class java/lang/Throwable
public final java.lang.String toString();
Code:
0: aload_0
1: getfield #16 // Field java/lang/reflect/Proxy.h:Ljava/lang/reflect/InvocationHandler;
4: aload_0
5: getstatic #65 // Field m2:Ljava/lang/reflect/Method;
8: aconst_null
9: invokeinterface #28, 4 // InterfaceMethod java/lang/reflect/InvocationHandler.invoke:(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;
14: checkcast #67 // class java/lang/String
17: areturn
18: athrow
19: astore_1
20: new #42 // class java/lang/reflect/UndeclaredThrowableException
23: dup
24: aload_1
25: invokespecial #45 // Method java/lang/reflect/UndeclaredThrowableException."<init>":(Ljava/lang/Throwable;)V
28: athrow
Exception table:
from to target type
0 18 18 Class java/lang/Error
0 18 18 Class java/lang/RuntimeException
0 18 19 Class java/lang/Throwable
static {};
Code:
0: ldc #70 // String java.lang.Object
2: invokestatic #76 // Method java/lang/Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
5: ldc #77 // String equals
7: iconst_1
8: anewarray #72 // class java/lang/Class
11: dup
12: iconst_0
13: ldc #70 // String java.lang.Object
15: invokestatic #76 // Method java/lang/Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
18: aastore
19: invokevirtual #81 // Method java/lang/Class.getMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
22: putstatic #20 // Field m1:Ljava/lang/reflect/Method;
25: ldc #83 // String java.lang.Runnable
27: invokestatic #76 // Method java/lang/Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
30: ldc #84 // String run
32: iconst_0
33: anewarray #72 // class java/lang/Class
36: invokevirtual #81 // Method java/lang/Class.getMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
39: putstatic #50 // Field m3:Ljava/lang/reflect/Method;
42: ldc #70 // String java.lang.Object
44: invokestatic #76 // Method java/lang/Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
47: ldc #85 // String hashCode
49: iconst_0
50: anewarray #72 // class java/lang/Class
53: invokevirtual #81 // Method java/lang/Class.getMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
56: putstatic #55 // Field m0:Ljava/lang/reflect/Method;
59: ldc #70 // String java.lang.Object
61: invokestatic #76 // Method java/lang/Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
64: ldc #86 // String toString
66: iconst_0
67: anewarray #72 // class java/lang/Class
70: invokevirtual #81 // Method java/lang/Class.getMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
73: putstatic #65 // Field m2:Ljava/lang/reflect/Method;
76: return
77: astore_1
78: new #90 // class java/lang/NoSuchMethodError
81: dup
82: aload_1
83: invokevirtual #93 // Method java/lang/Throwable.getMessage:()Ljava/lang/String;
86: invokespecial #96 // Method java/lang/NoSuchMethodError."<init>":(Ljava/lang/String;)V
89: athrow
90: astore_1
91: new #100 // class java/lang/NoClassDefFoundError
94: dup
95: aload_1
96: invokevirtual #93 // Method java/lang/Throwable.getMessage:()Ljava/lang/String;
99: invokespecial #101 // Method java/lang/NoClassDefFoundError."<init>":(Ljava/lang/String;)V
102: athrow
Exception table:
from to target type
0 77 77 Class java/lang/NoSuchMethodException
0 77 90 Class java/lang/ClassNotFoundException
public final void run();
Code:
0: aload_0
1: getfield #16 // Field java/lang/reflect/Proxy.h:Ljava/lang/reflect/InvocationHandler;
4: aload_0
5: getstatic #50 // Field m3:Ljava/lang/reflect/Method;
8: aconst_null
9: invokeinterface #28, 4 // InterfaceMethod java/lang/reflect/InvocationHandler.invoke:(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;
14: pop
15: return
16: athrow
17: astore_1
18: new #42 // class java/lang/reflect/UndeclaredThrowableException
21: dup
22: aload_1
23: invokespecial #45 // Method java/lang/reflect/UndeclaredThrowableException."<init>":(Ljava/lang/Throwable;)V
26: athrow
Exception table:
from to target type
0 16 16 Class java/lang/Error
0 16 16 Class java/lang/RuntimeException
0 16 17 Class java/lang/Throwable
}
public final class com.sun.proxy.$Proxy0扩展java.lang.reflect.proxy实现java.lang.Runnable{
私有静态java.lang.reflect.Method m1；
私有静态java.lang.reflect.Method m3；
私有静态java.lang.reflect.Method m0；
私有静态java.lang.reflect.Method m2；
public com.sun.proxy.$Proxy0（java.lang.reflect.InvocationHandler）；
代码：
0:aload_0
1:aload_1
2:invokespecial#8//方法java/lang/reflect/Proxy.“：（Ljava/lang/reflect/InvocationHandler；）V
5：返回
公共final int hashCode（）；
代码：
0:aload_0
1:getfield#16//Field java/lang/reflect/Proxy.h:Ljava/lang/reflect/InvocationHandler；
4:aload_0
5:getstatic#55//字段m0:Ljava/lang/reflect/Method；
8:aconst_null
9:invokeinterface#28，4//InterfaceMethod java/lang/reflect/InvocationHandler.invoke:（Ljava/lang/Object；Ljava/lang/reflect/Method；[Ljava/lang/Object；）Ljava/lang/Object；
14:checkcast#57//class java/lang/Integer
17:invokevirtual#60//方法java/lang/Integer.intValue:（）I
20：我轮到你了
21:athrow
22:astore_1
23:new#42//class java/lang/reflect/UndeclaredThrowableException
26:dup
27:aload_1
28:invokespecial#45//方法java/lang/reflect/UndeclaredThrowableException。”：（Ljava/lang/Throwable；）V
31:athrow
例外情况表：
从到目标类型
0 21类java/lang/Error
0 21类java/lang/RuntimeException
0 21 22类java/lang/Throwable
公共最终布尔值等于（java.lang.Object）；
代码：
0:aload_0
1:getfield#16//Field java/lang/reflect/Proxy.h:Ljava/lang/reflect/InvocationHandler；
4:aload_0
5:getstatic#20//字段m1:Ljava/lang/reflect/Method；
8:iconst_1
9:anewarray#22//类java/lang/Object
12:dup
13:iconst_0
14:aload_1
15:aastore
16:invokeinterface#28，4//InterfaceMethod java/lang/reflect/InvocationHandler.invoke:（Ljava/lang/Object；Ljava/lang/reflect/Method；[Ljava/lang/Object；）Ljava/lang/Object；
21:checkcast#30//class java/lang/Boolean
24:invokevirtual#34//方法java/lang/Boolean.booleanValue:（）Z
27:我轮到你了
28:athrow
29:astore_2
30:new#42//class java/lang/reflect/UndeclaredThrowableException
33:dup
34:aload_2
35:invokespecial#45//方法java/lang/reflect/UndeclaredThrowableException。”：（Ljava/lang/Throwable；）V
38:athrow
例外情况表：
从到目标类型
0 28类java/lang/Error
0 28类java/lang/RuntimeException
0 28 29类java/lang/Throwable
public final java.lang.String toString（）；
代码：
0:aload_0
1:getfield#16//Field java/lang/reflect/Proxy.h:Ljava/lang/reflect/InvocationHandler；
4:aload_0
5:getstatic#65//字段m2:Ljava/lang/reflect/Method；
8:aconst_null
9:invokeinterface#28，4//InterfaceMethod java/lang/reflect/InvocationHandler.invoke:（Ljava/lang/Object；Ljava/lang/reflect/Method；[Ljava/lang/Object；）Ljava/lang/Object；
14:checkcast#67//class java/lang/String
17：轮到你了
18:athrow
19:astore_1
20:new#42//类java/lang/reflect/UndeclaredThrowableException
23:dup
24:aload_1
25:invokespecial#45//方法java/lang/reflect/UndeclaredThrowableException。”：（Ljava/lang/Throwable；）V
28:athrow
例外情况表：
从到目标类型
0 18类java/lang/Error
0 18类java/lang/RuntimeException
0 18 19类java/lang/Throwable
静态{}；
代码：
0:ldc#70//String java.lang.Object
2:invokestatic#76//方法
Foo f = (Foo) proxyClass.
getConstructor(new Class[] { InvocationHandler.class }).
newInstance(new Object[] { handler });