java加密工具类，可设置对应的加解密key

public class AesEncryptUtil {

//使用AES-128-CBC加密模式，key需要为16位,key和iv可以相同！
private static String KEY ="whshenke20180606";

private static String IV ="whshenke20180606";
/**
* 加密方法
* @param data  要加密的数据
* @param key 加密key
* @param iv 加密iv
* @return 加密的结果
* @throws Exception
*/
public static String encrypt(String data, String key, String iv) throws Exception {
try {

Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");//"算法/模式/补码方式"
int blockSize = cipher.getBlockSize();

byte[] dataBytes = data.getBytes();
int plaintextLength = dataBytes.length;
if (plaintextLength % blockSize != 0) {
plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
}

byte[] plaintext = new byte[plaintextLength];
System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);

SecretKeySpec keyspec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
byte[] encrypted = cipher.doFinal(plaintext);

return Base64Util.encode(encrypted);

} catch (Exception e) {
e.printStackTrace();
return null;
}
}

/**
* 解密方法
* @param data 要解密的数据
* @param key  解密key
* @param iv 解密iv
* @return 解密的结果
* @throws Exception whshenke20180606
*/
public static String desEncrypt(String data, String key, String iv)  {
try {
byte[] encrypted1 = Base64Util.decode(data);

Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);

byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original, "UTF-8");
return originalString;
} catch (Exception e) {
//e.printStackTrace();
return null;
}

}

/**
* 使用默认的key和iv加密
* @param data
* @return
* @throws Exception
*/
public static String encrypt(String data) throws Exception {
return encrypt(data, KEY, IV);
}

/**
* 使用默认的key和iv解密
* @param data
* @return
* @throws Exception
*/
public static String desEncrypt(String data){
return desEncrypt(data, KEY, IV);
}

/**
* 测试
*/
public static void main(String args[]) throws Exception {
//KNnAbiCvFxispeG+wS01jA==
//KNnAbiCvFxispeG+wS01jA==
//KNnAbiCvFxispeG+wS01jA==
String test = "测试";

String data = null;
String key = "dufy20170329java";
String iv = "dufy20170329java";

//    data = encrypt(test, key, iv);
//KNnAbiCvFxispeG+wS01jA==

System.out.println(data);
System.out.println(desEncrypt("8XguKV2aprVwg4UqEie7f9gkr7xDaSKrGZZD7x1J3uISWkvQAtpq8hpkskwi V+8bJmRcmQWIZ4sRom37GB7w7O4AH+HjH5ixViJ7k6bx+oEFVWSmIqKEj4e5 lMcyXgcXpTB8IGnt1WKS2p7Qnn+cjA==", key, iv));
}

}