init

Author: quanke

.gitignore

@@ -0,0 +1 @@
+*.class

Chapter 04 Simple Factory/DESEncrypt.java

@@ -0,0 +1,74 @@
+import javax.crypto.Cipher;
+import javax.crypto.KeyGenerator;
+import javax.crypto.SecretKey;
+
+public class DESEncrypt {
+	public static void main(String args[])
+	{
+		String codeStringBegin="Sunny Liu";  //要加密的明文
+		String codeStringEnd=null;             //加密后的密文
+		String decodeString=null;              //密文解密后得到的明文
+		String cipherType = "DESede"; //加密算法类型，可设置为DES、DESede、AES等字符串
+		int keyLength = 112; //设置密钥长度
+		try
+		{
+			//获取密钥生成器
+			KeyGenerator keyGen=KeyGenerator.getInstance(cipherType);
+			//初始化密钥生成器，不同的加密算法其密钥长度可能不同
+			keyGen.init(keyLength);
+			//生成密钥
+			SecretKey key=keyGen.generateKey();
+	
+			//得到密钥字节码
+			byte[] keyByte=key.getEncoded();
+			//输出密钥的字节码
+			System.out.println("密钥是：");
+			for(int i=0;i<keyByte.length;i++)
+			{
+				System.out.print(keyByte[i]+",");
+			}
+			System.out.println("");
+			//创建密码器
+			Cipher cp=Cipher.getInstance(cipherType); 
+			//初始化密码器
+			cp.init(Cipher.ENCRYPT_MODE,key);
+			System.out.println("要加密的字符串是："+ codeStringBegin);
+			byte[] codeStringByte=codeStringBegin.getBytes("UTF8");
+			System.out.println("要加密的字符串对应的字节码是：");
+			for(int i=0;i<codeStringByte.length;i++)
+			{
+				System.out.print(codeStringByte[i]+",");
+			}
+			System.out.println("");
+			//开始加密
+			byte[] codeStringByteEnd=cp.doFinal(codeStringByte);
+			System.out.println("加密后的字符串对应的字节码是：");
+			for(int i=0;i<codeStringByteEnd.length;i++)
+			{
+				System.out.print(codeStringByteEnd[i]+",");
+			}
+			System.out.println("");
+			codeStringEnd=new String(codeStringByteEnd);
+			System.out.println("加密后的字符串是：" + codeStringEnd);
+			System.out.println("");
+			//重新初始化密码器
+			cp.init(Cipher.DECRYPT_MODE,key);
+			//开始解密
+			byte[] decodeStringByteEnd=cp.doFinal(codeStringByteEnd);
+			System.out.println("解密后的字符串对应的字节码是：");
+			for(int i=0;i<decodeStringByteEnd.length;i++)
+			{
+				System.out.print(decodeStringByteEnd[i]+",");
+			}
+			System.out.println("");
+			decodeString=new String(decodeStringByteEnd);
+			System.out.println("解密后的字符串是：" + decodeString);
+			System.out.println("");
+		} 
+		catch(Exception e)
+		{
+			e.printStackTrace();
+		}
+	}   
+}
+ 

Chapter 04 Simple Factory/sample01/Client.java

@@ -0,0 +1,17 @@
+public class Client
+{
+	public static void main(String args[])
+	{
+         try
+         {
+         	TV tv;
+         	String brandName=XMLUtilTV.getBrandName();
+         	tv=TVFactory.produceTV(brandName);
+         	tv.play();
+         }
+         catch(Exception e)
+         {
+         	System.out.println(e.getMessage());
+         }
+	}
+}

Chapter 04 Simple Factory/sample01/HaierTV.java

@@ -0,0 +1,7 @@
+public class HaierTV implements TV
+{
+	public void play()
+	{
+		System.out.println("º£¶ûµçÊÓ»ú²¥·ÅÖÐ......");
+	}
+}

Chapter 04 Simple Factory/sample01/HisenseTV.java

@@ -0,0 +1,7 @@
+public class HisenseTV implements TV
+{
+	public void play()
+	{
+		System.out.println("º£ÐŵçÊÓ»ú²¥·ÅÖÐ......");
+	}	
+}

Chapter 04 Simple Factory/sample01/TV.java

@@ -0,0 +1,4 @@
+public interface TV
+{
+	public void play();
+}

Chapter 04 Simple Factory/sample01/TVFactory.java

@@ -0,0 +1,20 @@
+public class TVFactory
+{
+	public static TV produceTV(String brand) throws Exception
+	{
+		if(brand.equalsIgnoreCase("Haier"))
+		{
+			System.out.println("电视机工厂生产海尔电视机！");
+			return new HaierTV();
+		}
+		else if(brand.equalsIgnoreCase("Hisense"))
+		{
+			System.out.println("电视机工厂生产海信电视机！");
+			return new HisenseTV();
+		}
+		else
+		{
+			throw new Exception("对不起，暂不能生产该品牌电视机！");
+		}
+	}
+}

Chapter 04 Simple Factory/sample01/XMLUtilTV.java

@@ -0,0 +1,30 @@
+import javax.xml.parsers.*;
+import org.w3c.dom.*;
+import org.xml.sax.SAXException;
+import java.io.*;
+public class XMLUtilTV
+{
+    //该方法用于从XML配置文件中提取品牌名称，并返回该品牌名称
+	public static String getBrandName()
+	{
+		try
+		{
+			//创建文档对象
+			DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();
+			DocumentBuilder builder = dFactory.newDocumentBuilder();
+			Document doc;							
+			doc = builder.parse(new File("configTV.xml")); 
+		
+			//获取包含品牌名称的文本节点
+			NodeList nl = doc.getElementsByTagName("brandName");
+            Node classNode=nl.item(0).getFirstChild();
+            String brandName=classNode.getNodeValue().trim();
+            return brandName;
+           }   
+           	catch(Exception e)
+           	{
+           		e.printStackTrace();
+           		return null;
+           	}
+		}
+}

Chapter 04 Simple Factory/sample01/configTV.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0"?>
+<config>
+	<brandName>TCL</brandName>
+</config>

Chapter 04 Simple Factory/sample02/Administrator.java

@@ -0,0 +1,12 @@
+public class Administrator extends User
+{
+	public Administrator()
+	{
+		System.out.println("创建管理员对象！");
+	}
+	
+	public void diffOperation()
+	{
+		System.out.println("管理员拥有创建和管理假条权限！");
+	}
+}