package com.baidu.wallet.bdwallet.utils;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;
public class Test {
   private static final String AES="AES";
   private static final String UTF8="UTF-8";
    /**
    * AES加密
    * @param content
    * @param pkey
    * @return
    * @throws DecoderException
    */
    private static byte[] encrypt(String content, String pkey) throws DecoderException {
      try {
        String private_key=pkey;
        byte[] encodeFormat=null;
        try {
          //秘钥 Hex解码为什么秘钥要进行解码，因为秘钥是某个秘钥明文进行了Hex编码后的值，所以在使用的时候要进行解码
          encodeFormat = Hex.decodeHex(private_key.toCharArray());
        } catch (DecoderException e) {
          e.printStackTrace();
        }
        SecretKeySpec key = new SecretKeySpec(encodeFormat, AES);
        // Cipher对象实际完成加密操作
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        // 加密内容进行编码
        byte[] byteContent = content.getBytes(UTF8);
        // 用密匙初始化Cipher对象
        cipher.init(Cipher.ENCRYPT_MODE, key);
        // 正式执行加密操作
        byte[] result = cipher.doFinal(byteContent);
        return result;
      } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
      } catch (NoSuchPaddingException e) {
        e.printStackTrace();
      } catch (InvalidKeyException e) {
        e.printStackTrace();
      } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
      } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
      } catch (BadPaddingException e) {
        e.printStackTrace();
      }
      return null;
    }
    /**
     * AES解密
     * @param contents
     * @param password
     * @return
     * @throws DecoderException
     */
    private static byte[] decrypt(String contents, String password) throws DecoderException {
      try {
        //密文使用Hex解码
        byte[]content = Hex.decodeHex(contents.toCharArray());
        //秘钥 Hex解码为什么秘钥要进行解码，因为秘钥是某个秘钥明文进行了Hex编码后的值，所以在使用的时候要进行解码
        byte[] encodeFormat = Hex.decodeHex(password.toCharArray());
        SecretKeySpec key = new SecretKeySpec(encodeFormat, AES);
        // Cipher对象实际完成加密操作
        Cipher cipher = Cipher.getInstance(AES);
        // 用密匙初始化Cipher对象
        cipher.init(Cipher.DECRYPT_MODE, key);
        // 正式执行解密操作
        byte[] result = cipher.doFinal(content);
        return result;
      } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
      } catch (NoSuchPaddingException e) {
        e.printStackTrace();
      } catch (InvalidKeyException e) {
        e.printStackTrace();
      } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
      } catch (BadPaddingException e) {
        e.printStackTrace();
      }
      return null;
    }
    /**
     * Aes加密
     * @param context 明文
     * @param private_key 秘钥
     * @return
     * @throws DecoderException
     */
    public static String encryption(String context,String private_key) throws DecoderException{
      //加密后的明文也就变成了密文
      byte[] encryptResult = encrypt(context, private_key);
      //密码文Hex编码
      String encryptResultStr = Hex.encodeHexString(encryptResult);
      return encryptResultStr;
    }
    /**
    * Aes解密
    * @param context 密文
    * @param private_key 秘钥
    * @return
    * @throws DecoderException
    * @throws UnsupportedEncodingException
    */
    public static String decryption(String context,String private_key) throws DecoderException, UnsupportedEncodingException{
     //这里的密文解密前先进行了Hex解码
      byte[] decryptResult = decrypt(context, private_key);
      String result = new String(decryptResult, UTF8);
      return result;
    }
    public static void main(String[] args) throws UnsupportedEncodingException, DecoderException {
      //加密内容
      String content = "123456787654321";
      //AES加密解密秘钥
      String password = "这个值一般都是给定的，双发都知道";
      // 加密
      System.out.println("加密前：" + content);
      // 调用加密方法
      String encryptResultStr = encryption(content, password);
      System.out.println("加密后：" + encryptResultStr);
      // 调用解密方法
      String result = decryption(encryptResultStr, password);
      // 解密内容进行解码
      System.out.println("解密后：" + result);
    }
}

<dependency>
  <groupId>commons-codec</groupId>
  <artifactId>commons-codec</artifactId>
  <version>1.4</version>
</dependency>