package?aes;

import?java.security.Key;
import?java.security.NoSuchAlgorithmException;
import?javax.crypto.Cipher;
import?javax.crypto.KeyGenerator;
import?javax.crypto.SecretKey;
import?javax.crypto.spec.SecretKeySpec;

public?class?AESCoder?{

???private?static?final?String?KEY_ALGORITHM?=?“AES“;
???private?static?final?String?DEFAULT_CIPHER_ALGORITHM?=?“AES/ECB/PKCS5Padding“;//默認的加密算法

???public?static?byte[]?initSecretKey（）?{

???????//返回生成指定算法密鑰生成器的?KeyGenerator?對象
???????KeyGenerator?kg?=?null;
???????try?{
???????????kg?=?KeyGenerator.getInstance（KEY_ALGORITHM）;
???????}?catch?（NoSuchAlgorithmException?e）?{
???????????e.printStackTrace（）;
???????????return?new?byte[0];
???????}
???????//初始化此密鑰生成器，使其具有確定的密鑰大小
???????//AES?要求密鑰長度為?128
???????kg.init（128）;
???????//生成一個密鑰
???????SecretKey??secretKey?=?kg.generateKey（）;
???????return?secretKey.getEncoded（）;
???}

???private?static?Key?toKey（byte[]?key）{
???????//生成密鑰
???????return?new?SecretKeySpec（key?KEY_ALGORITHM）;
???}

???public?static?byte[]?encrypt（byte[]?dataString?k）?throws?Exception{
???????return?encrypt（data?k）;
???}

???public?static?byte[]?encrypt（byte[]?databyte[]?key）?throws?Exception{
???????return?encrypt（data?keyDEFAULT_CIPHER_ALGORITHM）;
???}

???public?static?byte[]?encrypt（byte[]?databyte[]?keyString?cipherAlgorithm）?throws?Exception{
???????//還原密鑰
???????Key?k?=?toKey（key）;
???????return?encrypt（data?k?cipherAlgorithm）;
???}

???public?static?byte[]?encrypt（byte[]?dataKey?keyString?cipherAlgorithm）?throws?Exception{
???????//實例化
???????Cipher?cipher?=?Cipher.getInstance（cipherAlgorithm）;
???????//使用密鑰初始化，設置為加密模式
???????cipher.init（Cipher.ENCRYPT_MODE?key）;
???????//執行操作
???????return?cipher.doFinal（data）;
???}

???public?static?byte[]?decrypt（byte[]?dataString?k）?throws?Exception{
???????return?decrypt（data?k）;
???}

???public?static?byte[]?decrypt（byte[]?dataKey?key）?throws?Exception{
???????return?decrypt（data?keyDEFAULT_CIPHER_ALGORITHM）;
???}

???public?static?byte[]?decrypt（byte[]?databyte[]?keyString?cipherAlgorithm）?throws?Exception{
???????//還原密鑰
???????Key?k?=?toKey（key）;
???????return?decrypt（data?k?cipherAlgorithm）;
???}

???public?static?byte[]?decrypt（byte[]?dataKey?keyString?cipherAlgorithm）?throws?Exception{
???????//實例化
???????Cipher?cipher?=?Cipher.getInstance（cipherAlgorithm）;
???????//使用密鑰初始化，設置為解密模式
???????cipher.init（Cipher.DECRYPT_MODE?key）;
???????//執行操作
???????return?cipher.doFinal（data）;
???}

???private?static?String??showByteArray（byte[]?data）{
???????if（null?==?data）{
???????????return?null;
???????}
???????StringBuilder?sb?=?new?StringBuilder（“{“）;
???????for（byte?b:data）{
???????????sb.append（b）.append（““）;
???????}
???????sb.deleteCharAt（sb.length（）-1）;
???????sb.append（“}“）;
???????return?sb.toString（）;
???}

???public?static?void?main（String[]?args）?throws?Exception?{
???????byte[]?key?=?initSecretKey（）;
???????System.out.println（“key：“+showByteArray（key））;
???????String?k?=?“0f1571c947d9e8590cb7add6af7f6798“;?//

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-07-25?22:18??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\
?????文件??????634368??2018-07-25?22:18??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\des瀹為獙鎶ュ憡.doc
?????目錄???????????0??2018-07-25?22:19??__MACOSX\
?????目錄???????????0??2018-07-25?22:19??__MACOSX\des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\
?????文件?????????187??2018-07-25?22:18??__MACOSX\des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\._des瀹為獙鎶ュ憡.doc
?????文件??????408772??2018-07-08?15:41??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1.war
?????文件??????????86??2018-07-08?16:03??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\婕旂ず閾炬帴-瀹為獙2.txt
?????目錄???????????0??2018-07-25?22:18??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\
?????目錄???????????0??2018-07-08?16:16??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\WebContent\
?????文件?????????967??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\WebContent\Stein.jsp
?????目錄???????????0??2018-07-08?16:16??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\WebContent\meta-INF\
?????文件??????????39??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\WebContent\meta-INF\MANIFEST.MF
?????目錄???????????0??2018-07-08?16:16??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\WebContent\WEB-INF\
?????目錄???????????0??2018-07-08?16:18??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\WebContent\WEB-INF\lib\
?????文件????????1599??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\WebContent\rsa.jsp
?????文件????????1377??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\WebContent\des.jsp
?????文件?????????829??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.classpath
?????文件???????????8??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.gitignore
?????目錄???????????0??2018-07-08?16:16??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.settings\
?????文件??????????49??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件?????????357??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.settings\org.eclipse.jdt.core.prefs
?????文件?????????555??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.settings\.jsdtscope
?????文件?????????471??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.settings\org.eclipse.wst.common.component
?????文件???????????6??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????文件?????????335??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.settings\org.eclipse.wst.common.project.facet.core.xml
?????文件?????????878??2018-07-08?16:13??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\.project
?????目錄???????????0??2018-07-25?22:18??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\build\
?????目錄???????????0??2018-07-25?22:18??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\build\classes\
?????目錄???????????0??2018-07-08?16:18??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\build\classes\servlet\
?????目錄???????????0??2018-07-08?16:18??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\build\classes\tools\
?????目錄???????????0??2018-07-08?16:18??des瀹為獙鎶ュ憡+婕旂ず紼嬪簭\net_test1\build\classes\des\
............此處省略23個文件信息