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“;?//加密算法類型，可設(shè)置為DES、DESede、AES等字符串
		int?keyLength?=?112;?//設(shè)置密鑰長(zhǎng)度
		try
		{
			//獲取密鑰生成器
			KeyGenerator?keyGen=KeyGenerator.getInstance（cipherType）;
			//初始化密鑰生成器，不同的加密算法其密鑰長(zhǎng)度可能不同
			keyGen.init（keyLength）;
			//生成密鑰
			SecretKey?key=keyGen.generateKey（）;
	
			//得到密鑰字節(jié)碼
			byte[]?keyByte=key.getEncoded（）;
			//輸出密鑰的字節(jié)碼
			System.out.println（“密鑰是：“）;
			for（int?i=0;i			{
				System.out.print（keyByte[i]+““）;
			}
			System.out.println（““）;
			//創(chuàng)建密碼器
			Cipher?cp=Cipher.getInstance（cipherType）;?
			//初始化密碼器
			cp.init（Cipher.ENCRYPT_MODEkey）;
			System.out.println（“要加密的字符串是：“+?codeStringBegin）;
			byte[]?codeStringByte=codeStringBegin.getBytes（“UTF8“）;
			System.out.println（“要加密的字符串對(duì)應(yīng)的字節(jié)碼是：“）;
			for（int?i=0;i			{
				System.out.print（codeStringByte[i]+““）;
			}
			System.out.println（““）;
			//開始加密
			byte[]?codeStringByteEnd=cp.doFinal（codeStringByte）;
			System.out.println（“加密后的字符串對(duì)應(yīng)的字節(jié)碼是：“）;
			for（int?i=0;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（““）;
			//重新初始化密碼器
			cp.init（Cipher.DECRYPT_MODEkey）;
			//開始解密
			byte[]?decodeStringByteEnd=cp.doFinal（codeStringByteEnd）;
			System.out.println（“解密后的字符串對(duì)應(yīng)的字節(jié)碼是：“）;
			for（int?i=0;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（）;
		}
	}???
}
?

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????2819??2011-11-17?20:36??例子--劉偉\Chapter?04?Simple?Factory\DESEncrypt.class

?????文件???????2331??2011-11-17?20:35??例子--劉偉\Chapter?04?Simple?Factory\DESEncrypt.java

?????文件????????888??2011-11-15?21:31??例子--劉偉\Chapter?04?Simple?Factory\sample01\Client.class

?????文件????????354??2010-07-10?13:51??例子--劉偉\Chapter?04?Simple?Factory\sample01\Client.java

?????文件?????????71??2011-11-15?21:31??例子--劉偉\Chapter?04?Simple?Factory\sample01\configTV.xml

?????文件????????499??2010-07-08?15:24??例子--劉偉\Chapter?04?Simple?Factory\sample01\HaierTV.class

?????文件????????118??2010-07-08?15:21??例子--劉偉\Chapter?04?Simple?Factory\sample01\HaierTV.java

?????文件????????505??2010-07-08?23:35??例子--劉偉\Chapter?04?Simple?Factory\sample01\HisenseTV.class

?????文件????????121??2010-07-08?23:35??例子--劉偉\Chapter?04?Simple?Factory\sample01\HisenseTV.java

?????文件????????106??2011-10-16?12:53??例子--劉偉\Chapter?04?Simple?Factory\sample01\TV.class

?????文件?????????47??2010-07-10?13:58??例子--劉偉\Chapter?04?Simple?Factory\sample01\TV.java

?????文件????????956??2010-07-10?13:51??例子--劉偉\Chapter?04?Simple?Factory\sample01\TVFactory.class

?????文件????????442??2010-07-10?13:50??例子--劉偉\Chapter?04?Simple?Factory\sample01\TVFactory.java

?????文件???????1526??2010-07-08?15:38??例子--劉偉\Chapter?04?Simple?Factory\sample01\xmlUtilTV.class

?????文件????????875??2010-07-08?15:38??例子--劉偉\Chapter?04?Simple?Factory\sample01\xmlUtilTV.java

?????文件????????565??2010-08-04?15:12??例子--劉偉\Chapter?04?Simple?Factory\sample02\Administrator.class

?????文件????????219??2010-08-04?15:12??例子--劉偉\Chapter?04?Simple?Factory\sample02\Administrator.java

?????文件???????1026??2011-11-15?21:41??例子--劉偉\Chapter?04?Simple?Factory\sample02\Client.class

?????文件????????464??2010-07-09?00:09??例子--劉偉\Chapter?04?Simple?Factory\sample02\Client.java

?????文件????????535??2010-08-04?15:12??例子--劉偉\Chapter?04?Simple?Factory\sample02\Employee.class

?????文件????????199??2010-08-04?15:11??例子--劉偉\Chapter?04?Simple?Factory\sample02\Employee.java

?????文件????????541??2010-08-04?15:12??例子--劉偉\Chapter?04?Simple?Factory\sample02\Manager.class

?????文件????????203??2010-08-04?15:12??例子--劉偉\Chapter?04?Simple?Factory\sample02\Manager.java

?????文件????????504??2010-08-04?15:18??例子--劉偉\Chapter?04?Simple?Factory\sample02\User.class

?????文件????????160??2010-08-04?15:18??例子--劉偉\Chapter?04?Simple?Factory\sample02\User.java

?????文件????????503??2011-11-15?21:41??例子--劉偉\Chapter?04?Simple?Factory\sample02\UserDAO.class

?????文件????????243??2011-11-15?21:41??例子--劉偉\Chapter?04?Simple?Factory\sample02\UserDAO.java

?????文件????????506??2010-07-09?00:05??例子--劉偉\Chapter?04?Simple?Factory\sample02\UserFactory.class

?????文件????????306??2010-07-09?00:04??例子--劉偉\Chapter?04?Simple?Factory\sample02\UserFactory.java

?????文件????????882??2011-11-17?19:04??例子--劉偉\Chapter?05?Factory?Method\sample01\Client.class

............此處省略554個(gè)文件信息