java -AES 加密、解密

package com.jscz.common.utils;

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

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

public class AesEncryptUtils {

    //可配置到Constant中，並讀取配置文件注入
    private static final String KEY = "abcdef0123456789";

    //參數分別表明 算法名稱/加密模式/數據填充方式
    private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";

    /**
     * 加密
     * @param content 加密的字符串
     * @param encryptKey key值
     * @return
     * @throws Exception
     */
    public static String encrypt(String content, String encryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));
        byte[] b = cipher.doFinal(content.getBytes("utf-8"));
        return Base64.encodeBase64String(b);
    }

    /**
     * 解密
     * @param encryptStr 解密的字符串
     * @param decryptKey 解密的key值
     * @return
     * @throws Exception
     */
    public static String decrypt(String encryptStr, String decryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
        byte[] encryptBytes = Base64.decodeBase64(encryptStr);
        byte[] decryptBytes = cipher.doFinal(encryptBytes);
        return new String(decryptBytes);
    }

    public static String encrypt(String content) throws Exception {
        return encrypt(content, KEY);
    }
    public static String decrypt(String encryptStr) throws Exception {
        return decrypt(encryptStr, KEY);
    }

    public static void main(String[] args) throws Exception {
        String content = "派大星";
        System.out.println("加密前：" + content);

        String encrypt = encrypt(content, KEY);
        System.out.println("加密後：" + encrypt);

        String decrypt = decrypt(encrypt, KEY);         System.out.println("解密後：" + decrypt);     } }