AES加密和解密

package com.jn;

import java.net.URLDecoder;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;



import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class AESUtil {

public static final String DEFAULT_KEY = "123!@#abcs59aYGM";
/**
 * 加密--把加密后的byte数组先进行二进制转16进制在进行base64编码
 * 
 * @param sSrc
 * @param sKey
 * @return
 * @throws Exception
 */
public static String encrypt(String sSrc, String sKey) throws Exception {
if (sKey == null) {
throw new IllegalArgumentException("Argument sKey is null.");
}
if (sKey.length() != 16) {
throw new IllegalArgumentException(
"Argument sKey'length is not 16.");
}
byte[] raw = sKey.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);

byte[] encrypted = cipher.doFinal(sSrc.getBytes("UTF-8"));
String tempStr = parseByte2HexStr(encrypted);

BASE64Encoder encoder = new BASE64Encoder();
return encoder.encode(tempStr.getBytes("UTF-8"));
}

/**
 * 解密--先 进行base64解码，在进行16进制转为2进制然后再解码
 * 
 * @param sSrc
 * @param sKey
 * @return
 * @throws Exception
 */
public static String decrypt(String sSrc, String sKey) throws Exception {

if (sKey == null) {
throw new IllegalArgumentException("499");
}
if (sKey.length() != 16) {
throw new IllegalArgumentException("498");
}

byte[] raw = sKey.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");

Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);

BASE64Decoder encoder = new BASE64Decoder();
byte[] encrypted1 = encoder.decodeBuffer(sSrc);

String tempStr = new String(encrypted1, "utf-8");
encrypted1 = parseHexStr2Byte(tempStr);
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original, "utf-8");
return originalString;
}

/**
 * 将二进制转换成16进制
 * 
 * @param buf
 * @return
 */
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}

/**
 * 将16进制转换为二进制
 * 
 * @param hexStr
 * @return
 */
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1)
return null;
byte[] result = new byte[hexStr.length() / 2];
for (int i = 0; i < hexStr.length() / 2; i++) {
int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2),
16);
result[i] = (byte) (high * 16 + low);
}
return result;
}



public static void main(String[] args) throws Exception {
//String te = "action=register#mobile=13168766551#giftID=2707#workID=lengDeng#url=http://www.163.com/";
String te = "action=regist";
String decString =AESUtil.encrypt(te,DEFAULT_KEY);
System.out.println("加密 : "+decString);
//decString = URLDecoder.decode(decString, "GBK");
//System.err.println(decString);
String s = AESUtil.decrypt(decString, DEFAULT_KEY);
System.out.println("解密 : " + s);

}
}