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