Update Design Patterns

doc/source/patterns/index.rst

@@ -5,4 +5,5 @@ Design Patterns
     :maxdepth: 2
     :numbered: 0
 
-    designPatternsPrinciple
+    designPatternsPrinciple
+    designPatterns23

patterns/README.md

@@ -8,6 +8,22 @@
     - [接口隔离原则](../doc/source/patterns/designPatternsPrinciple.md#接口隔离原则)
     - [迪米特法则](../doc/source/patterns/designPatternsPrinciple.md#迪米特法则)
     - [开闭原则](../doc/source/patterns/designPatternsPrinciple.md#开闭原则)
+- [23种设计模式](../doc/source/patterns/designPatterns23.md)
+    - [单例模式](../doc/source/patterns/designPatterns23.md#单例模式)
+    - [工厂方法模式](../doc/source/patterns/designPatterns23.md#工厂方法模式)
+    - [抽象工厂模式](../doc/source/patterns/designPatterns23.md#抽象工厂模式)
+    - [模板方法模式](../doc/source/patterns/designPatterns23.md#模板方法模式)
+    - [建造者模式](../doc/source/patterns/designPatterns23.md#建造者模式)
+    - [原型模式](../doc/source/patterns/designPatterns23.md#原型模式)
+    - [中介者模式](../doc/source/patterns/designPatterns23.md#中介者模式)
+    - [命令模式](../doc/source/patterns/designPatterns23.md#命令模式)
+    - [责任链模式](../doc/source/patterns/designPatterns23.md#责任链模式)
+    - [策略模式](../doc/source/patterns/designPatterns23.md#策略模式)
+    - [迭代器模式](../doc/source/patterns/designPatterns23.md#迭代器模式)
+    - [观察者模式](../doc/source/patterns/designPatterns23.md#观察者模式)
+    - [备忘录模式](../doc/source/patterns/designPatterns23.md#备忘录模式)
+    - [访问者模式](../doc/source/patterns/designPatterns23.md#访问者模式)
+    - [解释器模式](../doc/source/patterns/designPatterns23.md#解释器模式)
 
 ## Runtime Environment
 - [Java 7](http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html)

patterns/src/main/java/t5750/patterns/singleton/DemandHolderSingleton.java

@@ -0,0 +1,14 @@
+package t5750.patterns.singleton;
+
+/**
+ * Initialization on Demand Holder
+ */
+public class DemandHolderSingleton {
+	private static class SingletonHolder {
+		public final static DemandHolderSingleton instance = new DemandHolderSingleton();
+	}
+
+	public static DemandHolderSingleton getInstance() {
+		return SingletonHolder.instance;
+	}
+}

patterns/src/main/java/t5750/patterns/singleton/DoubleCheckedSingleton.java

@@ -0,0 +1,22 @@
+package t5750.patterns.singleton;
+
+/**
+ * 双重检查锁（Double-Checked Lock）
+ */
+public final class DoubleCheckedSingleton {
+	private static DoubleCheckedSingleton singObj = null;
+
+	private DoubleCheckedSingleton() {
+	}
+
+	public static DoubleCheckedSingleton getSingleInstance() {
+		if (null == singObj) {
+			synchronized (DoubleCheckedSingleton.class) {
+				if (null == singObj) {
+					singObj = new DoubleCheckedSingleton();
+				}
+			}
+		}
+		return singObj;
+	}
+}

patterns/src/main/java/t5750/patterns/singleton/EagerSingleton.java

@@ -0,0 +1,15 @@
+package t5750.patterns.singleton;
+
+/**
+ * 饿汉模式
+ */
+public final class EagerSingleton {
+	private static EagerSingleton singObj = new EagerSingleton();
+
+	private EagerSingleton() {
+	}
+
+	public static EagerSingleton getSingleInstance() {
+		return singObj;
+	}
+}

patterns/src/main/java/t5750/patterns/singleton/LazySingleton.java

@@ -0,0 +1,18 @@
+package t5750.patterns.singleton;
+
+/**
+ * 懒汉模式
+ */
+public final class LazySingleton {
+	private static LazySingleton singObj = null;
+
+	private LazySingleton() {
+	}
+
+	public static LazySingleton getSingleInstance() {
+		if (null == singObj) {
+			singObj = new LazySingleton();
+		}
+		return singObj;
+	}
+}

patterns/src/main/java/t5750/patterns/singleton/ThreadSafeSingleton.java

@@ -0,0 +1,18 @@
+package t5750.patterns.singleton;
+
+/**
+ * 线程安全
+ */
+public final class ThreadSafeSingleton {
+	private static ThreadSafeSingleton singObj = null;
+
+	private ThreadSafeSingleton() {
+	}
+
+	public static synchronized ThreadSafeSingleton getSingleInstance() {
+		if (null == singObj) {
+			singObj = new ThreadSafeSingleton();
+		}
+		return singObj;
+	}
+}

patterns/src/main/java/singleton/ibm/example1/Singleton.java → patterns/src/main/java/t5750/patterns/singleton/ibm/example1/Singleton.java

@@ -1,4 +1,4 @@
-package singleton.ibm.example1;
+package t5750.patterns.singleton.ibm.example1;
 
 //https://www.ibm.com/developerworks/cn/java/designpattern/singleton/index.html
 public class Singleton {

patterns/src/main/java/singleton/ibm/example2/SingletonTest.java → patterns/src/main/java/t5750/patterns/singleton/ibm/example2/SingletonTest.java

@@ -1,4 +1,4 @@
-package singleton.ibm.example2;
+package t5750.patterns.singleton.ibm.example2;
 
 class SingletonException extends RuntimeException {
 	public SingletonException(String s) {

patterns/src/main/java/singleton/javaworld/example1/ClassicSingleton.java → patterns/src/main/java/t5750/patterns/singleton/javaworld/example1/ClassicSingleton.java

@@ -1,4 +1,4 @@
-package singleton.javaworld.example1;
+package t5750.patterns.singleton.javaworld.example1;
 
 //http://www.javaworld.com/article/2073352/core-java/simply-singleton.html
 public class ClassicSingleton {

patterns/src/main/java/singleton/javaworld/example1/SingletonTest.java → patterns/src/main/java/t5750/patterns/singleton/javaworld/example1/SingletonTest.java

@@ -1,4 +1,4 @@
-package singleton.javaworld.example1;
+package t5750.patterns.singleton.javaworld.example1;
 
 import org.apache.log4j.Logger;
 

patterns/src/main/java/singleton/javaworld/example2/Singleton.java → patterns/src/main/java/t5750/patterns/singleton/javaworld/example2/Singleton.java

@@ -1,4 +1,4 @@
-package singleton.javaworld.example2;
+package t5750.patterns.singleton.javaworld.example2;
 
 import org.apache.log4j.Logger;
 

patterns/src/main/java/singleton/javaworld/example2/SingletonTest.java → patterns/src/main/java/t5750/patterns/singleton/javaworld/example2/SingletonTest.java

@@ -1,4 +1,4 @@
-package singleton.javaworld.example2;
+package t5750.patterns.singleton.javaworld.example2;
 
 import org.apache.log4j.Logger;
 

patterns/src/main/java/singleton/javaworld/example3/Singleton.java → patterns/src/main/java/t5750/patterns/singleton/javaworld/example3/Singleton.java

@@ -1,4 +1,4 @@
-package singleton.javaworld.example3;
+package t5750.patterns.singleton.javaworld.example3;
 
 public class Singleton implements java.io.Serializable {
 	public static Singleton INSTANCE = new Singleton();

patterns/src/main/java/singleton/javaworld/example3/SingletonTest.java → patterns/src/main/java/t5750/patterns/singleton/javaworld/example3/SingletonTest.java

@@ -1,4 +1,4 @@
-package singleton.javaworld.example3;
+package t5750.patterns.singleton.javaworld.example3;
 
 import java.io.*;
 

patterns/src/main/java/singleton/tutorialspoint/ClassicSingleton.java → patterns/src/main/java/t5750/patterns/singleton/tutorialspoint/ClassicSingleton.java

@@ -1,4 +1,4 @@
-package singleton.tutorialspoint;
+package t5750.patterns.singleton.tutorialspoint;
 
 //https://www.tutorialspoint.com/java/java_using_singleton.htm
 public class ClassicSingleton {

patterns/src/main/java/singleton/tutorialspoint/Singleton.java → patterns/src/main/java/t5750/patterns/singleton/tutorialspoint/Singleton.java

@@ -1,4 +1,4 @@
-package singleton.tutorialspoint;
+package t5750.patterns.singleton.tutorialspoint;
 
 //https://www.tutorialspoint.com/java/java_using_singleton.htm
 // File Name: Singleton.java

patterns/src/main/java/singleton/tutorialspoint/SingletonDemo.java → patterns/src/main/java/t5750/patterns/singleton/tutorialspoint/SingletonDemo.java

@@ -1,4 +1,4 @@
-package singleton.tutorialspoint;
+package t5750.patterns.singleton.tutorialspoint;
 
 //https://www.tutorialspoint.com/java/java_using_singleton.htm
 // File Name: SingletonDemo.java