?????????????????????????????????????????Щ??final?????????????????????????λ?????????????????????????google???????ps??????????google?????????????????ASM??????????????????????????????????о?????????????????У?????????????????????????MethodVisitor??????????????????????????????????FieldNode????MethodNode??????????????class?????????????????????′???

    /**
         * @param args
         * @author lihzh
         * @date 2012-4-21 ????10:17:22
         */
        public static void main(String[] args) {
            try {
                ClassReader reader = new ClassReader(
                        "cn.home.practice.bean.ForReadClass");
                ClassNode cn = new ClassNode();
                reader.accept(cn?? 0);
                List<MethodNode> methodList = cn.methods;
                for (MethodNode md : methodList) {
                    System.out.println(md.name);
                    System.out.println(md.access);
                    System.out.println(md.desc);
                    System.out.println(md.signature);
                    List<LocalVariableNode> lvNodeList = md.localVariables;
                    for (LocalVariableNode lvn : lvNodeList) {
                        System.out.println("Local name: " + lvn.name);
                        System.out.println("Local name: " + lvn.start.getLabel());
                        System.out.println("Local name: " + lvn.desc);
                        System.out.println("Local name: " + lvn.signature);
                    }
                    Iterator<AbstractInsnNode> instraIter = md.instructions.iterator();
                    while (instraIter.hasNext()) {
                        AbstractInsnNode abi = instraIter.next();
                        if (abi instanceof LdcInsnNode) {
                            LdcInsnNode ldcI = (LdcInsnNode) abi;
                            System.out.println("LDC node value: " + ldcI.cst);
                        }
                    }
                }
                MethodVisitor mv = cn.visitMethod(Opcodes.AALOAD?? "<init>"?? Type
                        .getType(String.class).toString()?? null?? null);
                mv.visitFieldInsn(Opcodes.GETFIELD?? Type.getInternalName(String.class)?? "str"?? Type
                        .getType(String.class).toString());
                System.out.println(cn.name);
                List<FieldNode> fieldList = cn.fields;
                for (FieldNode fieldNode : fieldList) {
                    System.out.println("Field name: " + fieldNode.name);
                    System.out.println("Field desc: " + fieldNode.desc);
                    System.out.println("Filed value: " + fieldNode.value);
                    System.out.println("Filed access: " + fieldNode.access);
                    if (fieldNode.visibleAnnotations != null) {
                        for (AnnotationNode anNode : fieldNode.visibleAnnotations) {
                            System.out.println(anNode.desc);
                        }
                    }
                }
            } catch (IOException e) {
                e.printStackTrace();
            } catch (SecurityException e) {
                e.printStackTrace();
            } catch (IllegalArgumentException e) {
                e.printStackTrace();
            }
        }

??????AbstractInsnNode?У?????????????????????????

????--------------------------------------------------------------------------------

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