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);

}

}

原文：https://www.cnblogs.com/chen-lhx/p/5817161.html