init

Author: quanke

.gitignore

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+*.class

Chapter 04 Simple Factory/DESEncrypt.java

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+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

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+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

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

Chapter 04 Simple Factory/sample01/HisenseTV.java

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

Chapter 04 Simple Factory/sample01/TV.java

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+public interface TV
+{
+	public void play();
+}

Chapter 04 Simple Factory/sample01/TVFactory.java

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+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

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+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

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+<?xml version="1.0"?>
+<config>
+	<brandName>TCL</brandName>
+</config>

Chapter 04 Simple Factory/sample02/Administrator.java

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+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！");
+	}
+}

Chapter 04 Simple Factory/sample02/Client.java

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+public class Client
+{
+	public static void main(String args[])
+	{
+         try
+         {
+         	User user;
+         	UserDAO userDao=new UserDAO();
+         	int permission=userDao.findPermission("zhangsan","123456");
+         	user=UserFactory.getUser(permission);
+         	user.sameOperation();
+         	user.diffOperation();
+         }
+         catch(Exception e)
+         {
+         	System.out.println(e.getMessage());
+         }
+	}
+}

Chapter 04 Simple Factory/sample02/Employee.java

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+public class Employee extends User
+{
+	public Employee()
+	{
+		System.out.println("创建员工对象！");
+	}
+	
+	public void diffOperation()
+	{
+		System.out.println("员工拥有创建假条权限！");
+	}
+}

Chapter 04 Simple Factory/sample02/Manager.java

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+public class Manager extends User
+{
+	public Manager()
+	{
+		System.out.println("创建经理对象！");
+	}
+	
+	public void diffOperation()
+	{
+		System.out.println("经理拥有创建和审批假条权限！");
+	}
+}

Chapter 04 Simple Factory/sample02/User.java

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+public abstract class User
+{
+	public void sameOperation()
+	{
+        System.out.println("Ð޸ĸöÈË×ÊÁÏ£¡");
+	}
+	
+	public abstract void diffOperation();
+}

Chapter 04 Simple Factory/sample02/UserDAO.java

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+public class UserDAO
+{
+    public int findPermission(String userName,String userPassword)
+    {
+    	if("zhangsan"==userName&&"123456"==userPassword)
+    	{
+    		return 2;
+    	}
+    	else
+    	{
+    		return -1;
+    	}
+    }
+}

Chapter 04 Simple Factory/sample02/UserFactory.java

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+public class UserFactory
+{
+	public static User getUser(int permission)
+	{
+		if(0==permission)
+		{
+			return new Employee();
+		}
+		else if(1==permission)
+		{
+			return new Manager();
+		}
+		else if(2==permission)
+		{
+			return new Administrator();
+		}
+		else
+		{
+			return null;
+		}
+	}
+}

Chapter 05 Factory Method/sample01/Client.java

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+public class Client
+{
+	public static void main(String args[])
+	{
+         try
+         {
+         	TV tv;
+         	TVFactory factory;
+         	factory=(TVFactory)XMLUtil.getBean();
+         	tv=factory.produceTV();
+         	tv.play();
+         }
+         catch(Exception e)
+         {
+         	System.out.println(e.getMessage());
+         }
+	}
+}

Chapter 05 Factory Method/sample01/HaierTV.java

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

Chapter 05 Factory Method/sample01/HaierTVFactory.java

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+public class HaierTVFactory implements TVFactory
+{
+    public TV produceTV()
+    {
+    	System.out.println("海尔电视机工厂生产海尔电视机。");
+    	return new HaierTV();
+    }
+}

Chapter 05 Factory Method/sample01/HisenseTV.java

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

Chapter 05 Factory Method/sample01/HisenseTVFactory.java

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+public class HisenseTVFactory implements TVFactory
+{
+    public TV produceTV()
+    {
+    	System.out.println("海信电视机工厂生产海信电视机。");
+    	return new HisenseTV();
+    }
+}

Chapter 05 Factory Method/sample01/TV.java

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+public interface TV
+{
+	public void play();
+}

Chapter 05 Factory Method/sample01/TVFactory.java

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+public interface TVFactory
+{
+    public TV produceTV();
+}

Chapter 05 Factory Method/sample01/XMLUtil.java

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+import javax.xml.parsers.*;
+import org.w3c.dom.*;
+import org.xml.sax.SAXException;
+import java.io.*;
+public class XMLUtil
+{
+//该方法用于从XML配置文件中提取具体类类名，并返回一个实例对象
+	public static Object getBean()
+	{
+		try
+		{
+			//创建文档对象
+			DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();
+			DocumentBuilder builder = dFactory.newDocumentBuilder();
+			Document doc;							
+			doc = builder.parse(new File("config.xml")); 
+		
+			//获取包含类名的文本节点
+			NodeList nl = doc.getElementsByTagName("className");
+            Node classNode=nl.item(0).getFirstChild();
+            String cName=classNode.getNodeValue();
+            
+            //通过类名生成实例对象并将其返回
+            Class c=Class.forName(cName);
+	  	    Object obj=c.newInstance();
+            return obj;
+           }   
+           	catch(Exception e)
+           	{
+           		e.printStackTrace();
+           		return null;
+           	}
+		}
+}