java对称加密（DES）
/** * DESHelper.java * cn.com.songjy.test * * Function： TODO* * ver date author * ────────────────────────────────── * 2012-6-29 songjianyong * * Copyright (c) 2012, TNT All Rights Reserved. */package cn.com.songjy.test;import java.security.SecureRandom;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;/** * ClassName:DESHelper ** @author songjianyong * @version 1.0 * @since v1.0 * @Date 2012-6-29 下午1:36:05 */public class DESHelper {/** * @method main * @param args * @throws * @since v1.0 */public static void main(String[] args) {try {// 明文String str = "mobile:13757352769|type:w|content:测试";// 密钥(客户拥有)String password = "01010101";String desc = DESHelper.DoDES(str, password, 0);System.out.println("密文：" + desc);// 解密str = DESHelper.DoDES(desc, password, 1);System.out.println("明文：" + str);} catch (Exception e1) {e1.printStackTrace();}}/** ** @method DoDES * @param data * 需要加密解密的数据 * @param password * 密钥 必须8位字节 * @param flag * 加密解密标志 0：加密 ，1：解密 * @return * @throws * @since v1.0 */public static String DoDES(String data, String password, int flag) {try {SecureRandom random = new SecureRandom();DESKeySpec desKey = new DESKeySpec(password.getBytes());SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");SecretKey securekey = keyFactory.generateSecret(desKey);Cipher cipher = Cipher.getInstance("DES");if (flag == 0) {BASE64Encoder base64encoder = new BASE64Encoder();cipher.init(Cipher.ENCRYPT_MODE, securekey, random);return base64encoder.encode(cipher.doFinal(data.getBytes("UTF-8")));} else {BASE64Decoder base64decoder = new BASE64Decoder();byte[] encodeByte = base64decoder.decodeBuffer(data);cipher.init(Cipher.DECRYPT_MODE, securekey, random);byte[] decoder = cipher.doFinal(encodeByte);return new String(decoder, "UTF-8");}} catch (Exception e) {e.printStackTrace();}return null;}}测试效果：
密文：r0N21ttXuQY3yAsf2S+5M16WSltXCx2B9U4e53su+Q08Ep5D1Wgcla1qiLT6N4M9
明文：mobile:13757352769|type:w|content:测试
引自：http://www.linuxidc.com/Linux/2011-04/34990.htm
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