AES-128-CBC加密模式

import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

import javax.crypto.Cipher;

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 = "abcdefg123456789";

private static String IV = "abcdefg123456789";


/**
 * 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(), "AES");
        IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

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

        return new Base64().encodeToString(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
 */
public static String desEncrypt(String data, String key, String iv) throws Exception {
    try {
        byte[] encrypted1 = new Base64().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);
        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) throws Exception {
    return desEncrypt(data, KEY, IV);
}



/**
 * 测试
 */
public static void main(String args[]) throws Exception {

    String test = "test123";

    String data = null;
    String key = "abcdefg123456789";
    String iv = "abcdefg123456789";

    data = encrypt(test, key, iv);

    System.out.println(data);
    System.out.println(desEncrypt(data, key, iv));
}

}