import javax.crypto.Cipher; 
import javax.crypto.spec.SecretKeySpec; 
import org.apache.commons.codec.binary.Base64; 
/** 
* 
* @author Administrator 
* 
*/ 
public class AES { 
// 加密 
public static String Encrypt(String sSrc, String sKey) throws Exception { 
if (sKey == null) { 
System.out.print("Key为空null"); 
return null; 
} 
// 判断Key是否为16位 
if (sKey.length() != 16) { 
System.out.print("Key长度不是16位"); 
return null; 
} 
byte[] raw = sKey.getBytes("utf-8"); 
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); 
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式" 
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec); 
byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8")); 
return new Base64().encodeToString(encrypted);//此处使用BASE64做转码功能，同时能起到2次加密的作用。 
    } 
// 解密 
public static String Decrypt(String sSrc, String sKey) throws Exception { 
try { 
// 判断Key是否正确 
if (sKey == null) { 
System.out.print("Key为空null"); 
return null; 
} 
// 判断Key是否为16位 
if (sKey.length() != 16) { 
System.out.print("Key长度不是16位"); 
return null; 
} 
byte[] raw = sKey.getBytes("utf-8"); 
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); 
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"); 
cipher.init(Cipher.DECRYPT_MODE, skeySpec); 
byte[] encrypted1 = new Base64().decode(sSrc);//先用base64解密 
try { 
byte[] original = cipher.doFinal(encrypted1); 
String originalString = new String(original,"utf-8"); 
return originalString; 
} catch (Exception e) { 
System.out.println(e.toString()); 
return null; 
} 
} catch (Exception ex) { 
System.out.println(ex.toString()); 
return null; 
} 
} 
public static void main(String[] args) throws Exception { 
/* 
* 此处使用AES-128-ECB加密模式，key需要为16位。 
*/ 
String cKey = "1234567890123456"; 
// 需要加密的字串 
String cSrc = "www.gowhere.so"; 
System.out.println(cSrc); 
// 加密 
String enString = AES.Encrypt(cSrc, cKey); 
System.out.println("加密后的字串是：" + enString); 
// 解密 
String DeString = AES.Decrypt(enString, cKey); 
System.out.println("解密后的字串是：" + DeString); 
} 
} 
//源代码片段来自云代码http://yuncode.net