java使用ASM字节码工具调用类方法和实例方法，asm字节码,调用静态方法：//int

java使用ASM字节码工具调用类方法和实例方法，asm字节码,调用静态方法：//int

调用静态方法：

//int c=sample.InvokeMethod.add(2,3);mv.visitInsn(ICONST_2); //arg1mv.visitInsn(ICONST_3); //arg2mv.visitMethodInsn(INVOKESTATIC,    "sample/InvokeMethod", //class name   "add", //static method name  "(II)I"); //return type is integer

调用实例方法：

//obj.cal(4,5);mv.visitVarInsn(ALOAD, 2); //load object from stackmv.visitInsn(ICONST_4); //arg1mv.visitInsn(ICONST_5); //arg2mv.visitMethodInsn(INVOKEVIRTUAL, "sample/InvokeMethod", "cal", "(II)V");

实例化对象，即调用构造函数：

//sample.InvokeMethod obj=new sample.InvokeMethod(6,7);mv.visitTypeInsn(NEW, "sample/InvokeMethod");mv.visitInsn(DUP);mv.visitIntInsn(BIPUSH, 6);mv.visitIntInsn(BIPUSH, 7);mv.visitMethodInsn(INVOKESPECIAL, "sample/InvokeMethod", "<init>", "()V");mv.visitVarInsn(ASTORE, 4);