java实现AES可逆加密算法

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如题：

package com.hdu.encode;import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;/*** AES 是一种可逆加密算法，对用户的敏感信息加密处理 对原始数据进行AES加密后，在进行Base64编码转化；*/
public class AESOperator {/** 加密用的Key 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式，key需要为16位。*/
//	a0b891c2d563e4f7private String sKey = "abcdef0123456789";private String ivParameter = "0123456789abcdef";private static AESOperator instance = null;private AESOperator() {}public static AESOperator getInstance() {if (instance == null)instance = new AESOperator();return instance;}// 加密public String encrypt(String sSrc){String result = "";try {Cipher cipher;cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");byte[] raw = sKey.getBytes();SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));result = new BASE64Encoder().encode(encrypted);} catch (Exception e) {e.printStackTrace();} // 此处使用BASE64做转码。return result;}// 解密public String decrypt(String sSrc){try {byte[] raw = sKey.getBytes("ASCII");SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密byte[] original = cipher.doFinal(encrypted1);String originalString = new String(original, "utf-8");return originalString;} catch (Exception ex) {ex.printStackTrace();return null;}}public static void main(String[] args){// 需要加密的字串String cSrc = "测试";System.out.println(cSrc + "  长度为" + cSrc.length());// 加密long lStart = System.currentTimeMillis();String enString = AESOperator.getInstance().encrypt(cSrc);System.out.println("加密后的字串是：" + enString + "长度为" + enString.length());long lUseTime = System.currentTimeMillis() - lStart;System.out.println("加密耗时：" + lUseTime + "毫秒");// 解密lStart = System.currentTimeMillis();String DeString = AESOperator.getInstance().decrypt(enString);System.out.println("解密后的字串是：" + DeString);lUseTime = System.currentTimeMillis() - lStart;System.out.println("解密耗时：" + lUseTime + "毫秒");}
}

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