AESUtils.java

package com.vcredit.framework.utils;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AESUtils {

private static final Logger LOGGER = LoggerFactory.getLogger(AESUtils.class);

// 加密
public static String Encrypt(String sSrc, String sKey) throws Exception {
if (sKey == null) {
LOGGER.error("AES加密失败！--密钥为null");
return null;
}
// 判断Key是否为16位
if (sKey.length() != 16) {
LOGGER.error("AES加密失败！--密钥只能为16位字符串");
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) {
LOGGER.error("AES加密失败！--密钥为null");
return null;
}
// 判断Key是否为16位
if (sKey.length() != 16) {
LOGGER.error("AES加密失败！--密钥只能为16位字符串");
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) {
LOGGER.error("AES加密失败！", ex);
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";
String cKey = "activityzhounian";
// 需要加密的字串
String cSrc = "12313123";
System.out.println(cSrc);
// 加密
String enString = AESUtils.Encrypt(cSrc, cKey);
System.out.println("加密后的字串是：" + enString);

// 解密
String DeString = AESUtils.Decrypt(enString, cKey);
System.out.println("解密后的字串是：" + DeString);
}
}