From b507f4e478644f60d8fa9fd112fe6c0745339303 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?F=E5=98=89=E9=98=B3?= <fjy8018@qq.com>
Date: Mon, 24 Sep 2018 16:33:46 +0800
Subject: [PATCH] =?UTF-8?q?=E5=BA=8F=E5=88=97=E5=8C=96=E6=94=BB=E5=87=BB?=
 =?UTF-8?q?=E8=A1=A5=E5=85=85?=
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---
 .../pattern/creational/singleton/HungrySingleton.java  |  8 ++++++++
 .../singleton/HungrySingletonSerializableImprove.java  | 10 ++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/main/java/top/fjy8018/designpattern/pattern/creational/singleton/HungrySingleton.java b/src/main/java/top/fjy8018/designpattern/pattern/creational/singleton/HungrySingleton.java
index dcd62fc..4cf6d76 100644
--- a/src/main/java/top/fjy8018/designpattern/pattern/creational/singleton/HungrySingleton.java
+++ b/src/main/java/top/fjy8018/designpattern/pattern/creational/singleton/HungrySingleton.java
@@ -1,5 +1,7 @@
 package top.fjy8018.designpattern.pattern.creational.singleton;
 
+import lombok.extern.slf4j.Slf4j;
+
 import java.io.Serializable;
 
 /**
@@ -10,6 +12,7 @@ import java.io.Serializable;
  * @author F嘉阳
  * @date 2018-09-24 15:38
  */
+@Slf4j
 public class HungrySingleton implements Serializable {
     /**
      * 类加载时初始化
@@ -18,10 +21,15 @@ public class HungrySingleton implements Serializable {
     private static final HungrySingleton HUNGRYSINGLETON;
 
     static {
+        log.debug(HungrySingleton.class.getSimpleName() + "静态块实例化");
         HUNGRYSINGLETON = new HungrySingleton();
     }
 
+    /**
+     * 该构造器会在反射攻击时调用
+     */
     private HungrySingleton() {
+        log.debug(HungrySingleton.class.getSimpleName() + "构造器实例化");
     }
 
     public static HungrySingleton getInstance() {
diff --git a/src/main/java/top/fjy8018/designpattern/pattern/creational/singleton/HungrySingletonSerializableImprove.java b/src/main/java/top/fjy8018/designpattern/pattern/creational/singleton/HungrySingletonSerializableImprove.java
index 307bce2..fb962fc 100644
--- a/src/main/java/top/fjy8018/designpattern/pattern/creational/singleton/HungrySingletonSerializableImprove.java
+++ b/src/main/java/top/fjy8018/designpattern/pattern/creational/singleton/HungrySingletonSerializableImprove.java
@@ -1,5 +1,7 @@
 package top.fjy8018.designpattern.pattern.creational.singleton;
 
+import lombok.extern.slf4j.Slf4j;
+
 import java.io.ObjectInputStream;
 import java.io.ObjectStreamClass;
 import java.io.Serializable;
@@ -13,21 +15,24 @@ import java.io.Serializable;
  * 返回true后序列化过程通过反射机制实例化该类
  * <p>
  * 改进方法：在{@link ObjectInputStream#readOrdinaryObject(boolean)} 2071行会检测内部方法
- * 在{@link ObjectStreamClass#hasReadResolveMethod()} 中，判断是否存在名为readResolve的方法，方法名定义在522行
- * 若有该方法，则用该方法返回的对象写入
+ * 在{@link ObjectStreamClass#hasReadResolveMethod()} 中，此时已经实例化了一个新对象，之后判断是否存在名为readResolve的方法，方法名定义在522行
+ * 若有该方法，则用该方法返回的对象替换之前实例化的新对象
  *
  * @author F嘉阳
  * @date 2018-09-24 15:38
  */
+@Slf4j
 public class HungrySingletonSerializableImprove implements Serializable {
 
     private static final HungrySingletonSerializableImprove HUNGRYSINGLETON;
 
     static {
+        log.debug(HungrySingletonSerializableImprove.class.getSimpleName() + "实例化");
         HUNGRYSINGLETON = new HungrySingletonSerializableImprove();
     }
 
     private HungrySingletonSerializableImprove() {
+        log.debug(HungrySingletonSerializableImprove.class.getSimpleName() + "实例化");
     }
 
     public static HungrySingletonSerializableImprove getInstance() {
@@ -40,6 +45,7 @@ public class HungrySingletonSerializableImprove implements Serializable {
      * @return
      */
     private Object readResolve() {
+        log.debug("序列化获取对象");
         return HUNGRYSINGLETON;
     }