AES対称暗号化および復号化コードJava

package demo.security;
 
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.Base64;
import java.util.Scanner;
 
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
 
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
 
/*
 * AES对称加密和解密
 */
public class SymmetricEncoder {
 /*
  * 加密
  * 1.构造密钥生成器
  * 2.根据ecnodeRules规则初始化密钥生成器
  * 3.产生密钥
  * 4.创建和初始化密码器
  * 5.内容加密
  * 6.返回字符串
  */
  public static String AESEncode(String encodeRules,String content){
    try {
      //1.构造密钥生成器，指定为AES算法,不区分大小写
      KeyGenerator keygen=KeyGenerator.getInstance("AES");
      //2.根据ecnodeRules规则初始化密钥生成器
      //生成一个128位的随机源,根据传入的字节数组
      keygen.init(128, new SecureRandom(encodeRules.getBytes()));
       //3.产生原始对称密钥
      SecretKey original_key=keygen.generateKey();
       //4.获得原始对称密钥的字节数组
      byte [] raw=original_key.getEncoded();
      //5.根据字节数组生成AES密钥
      SecretKey key=new SecretKeySpec(raw, "AES");
       //6.根据指定算法AES自成密码器
      Cipher cipher=Cipher.getInstance("AES");
       //7.初始化密码器，第一个参数为加密(Encrypt_mode)或者解密解密(Decrypt_mode)操作，第二个参数为使用的KEY
      cipher.init(Cipher.ENCRYPT_MODE, key);
      //8.获取加密内容的字节数组(这里要设置为utf-8)不然内容中如果有中文和英文混合中文就会解密为乱码
      byte [] byte_encode=content.getBytes("utf-8");
      //9.根据密码器的初始化方式--加密：将数据加密
      byte [] byte_AES=cipher.doFinal(byte_encode);
     //10.将加密后的数据转换为字符串
      //这里用Base64Encoder中会找不到包
      //解决办法：
      //在项目的Build path中先移除JRE System Library，再添加库JRE System Library，重新编译后就一切正常了。
      String AES_encode=new String(new BASE64Encoder().encode(byte_AES));
     //11.将字符串返回
      return AES_encode;
    } 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();
    } catch (UnsupportedEncodingException e) {
      e.printStackTrace();
    }
    
    //如果有错就返加nulll
    return null;    
  }
  /*
   * 解密
   * 解密过程：
   * 1.同加密1-4步
   * 2.将加密后的字符串反纺成byte[]数组
   * 3.将加密内容解密
   */
  public static String AESDncode(String encodeRules,String content){
    try {
      //1.构造密钥生成器，指定为AES算法,不区分大小写
      KeyGenerator keygen=KeyGenerator.getInstance("AES");
      //2.根据ecnodeRules规则初始化密钥生成器
      //生成一个128位的随机源,根据传入的字节数组
      keygen.init(128, new SecureRandom(encodeRules.getBytes()));
       //3.产生原始对称密钥
      SecretKey original_key=keygen.generateKey();
       //4.获得原始对称密钥的字节数组
      byte [] raw=original_key.getEncoded();
      //5.根据字节数组生成AES密钥
      SecretKey key=new SecretKeySpec(raw, "AES");
       //6.根据指定算法AES自成密码器
      Cipher cipher=Cipher.getInstance("AES");
       //7.初始化密码器，第一个参数为加密(Encrypt_mode)或者解密(Decrypt_mode)操作，第二个参数为使用的KEY
      cipher.init(Cipher.DECRYPT_MODE, key);
      //8.将加密并编码后的内容解码成字节数组
      byte [] byte_content= new BASE64Decoder().decodeBuffer(content);
      /*
       * 解密
       */
      byte [] byte_decode=cipher.doFinal(byte_content);
      String AES_decode=new String(byte_decode,"utf-8");
      return AES_decode;
    } catch (NoSuchAlgorithmException e) {
      e.printStackTrace();
    } catch (NoSuchPaddingException e) {
      e.printStackTrace();
    } catch (InvalidKeyException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
      e.printStackTrace();
    } catch (BadPaddingException e) {
      e.printStackTrace();
    }
    
    //如果有错就返加nulll
    return null;    
  }
  
  public static void main(String[] args) {
    SymmetricEncoder se=new SymmetricEncoder();
    Scanner scanner=new Scanner(System.in);
    /*
     * 加密
     */
    System.out.println("使用AES对称加密，请输入加密的规则");
    String encodeRules=scanner.next();
    System.out.println("请输入要加密的内容:");
    String content = scanner.next();
    System.out.println("根据输入的规则"+encodeRules+"加密后的密文是:"+se.AESEncode(encodeRules, content));
    
    /*
     * 解密
     */
    System.out.println("使用AES对称解密，请输入加密的规则：(须与加密相同)");
     encodeRules=scanner.next();
    System.out.println("请输入要解密的内容（密文）:");
     content = scanner.next();
    System.out.println("根据输入的规则"+encodeRules+"解密后的明文是:"+se.AESDncode(encodeRules, content));
  }
 
}

元のリンクhttp://www.zzvips.com/article/72485.html

    private static final String ENCRY_ALGORITHM = "AES";
    /**
     * 加密算法/加密模式/填充类型
     */
    private static final String CIPHER_MODE = "AES/ECB/PKCS5Padding";
    /**
     * 设置 iv 偏移量
     */
    private static final String IV_ = null;
/**
 * 设置加密字符集
 */
private static final String CHARACTER = "UTF-8";
    /**
     * 设置加密密码处理长度。
     */
    private static final int PWD_SIZE = 16;
    /**
     * 加密
     */
    public static String encryptHex(String text, String password) {
        try {
            byte[] cipherTextBytes = encrypt(text.getBytes(CHARACTER),
                    pwdHandler(password));
            String cipherText = byte2hex(cipherTextBytes);
            return cipherText;
        } catch (Exception e) {
//            log.warn("[AESUtil] encrypt exception, text:" + text, e);
        }
        return null;
    }
    public static byte[] encrypt(byte[] clearTextBytes, byte[] pwdBytes)
            throws Exception {
        SecretKeySpec keySpec = new SecretKeySpec(pwdBytes,
                ENCRY_ALGORITHM);
        Cipher cipher = Cipher.getInstance(CIPHER_MODE);
        cipher.init(Cipher.ENCRYPT_MODE, keySpec);
        byte[] cipherTextBytes = cipher.doFinal(clearTextBytes);
        return cipherTextBytes;
    }
    /**
     * 密码处理方法
     */
    private static byte[] pwdHandler(String password) throws
            UnsupportedEncodingException {
        byte[] data = null;
        if (password == null) {
            password = "";
        }
        StringBuffer sb = new StringBuffer(PWD_SIZE);
        sb.append(password);
        while (sb.length() < PWD_SIZE) {

            sb.append("0");
        }
        if (sb.length() > PWD_SIZE) {
            sb.setLength(PWD_SIZE);
        }
        data = sb.toString().getBytes("UTF-8");
        return data;
    }
    public static String byte2hex(byte[] bytes) {
        StringBuffer sb = new StringBuffer(bytes.length * 2);
        String tmp = "";
        for (int n = 0; n < bytes.length; n++) {
            tmp = (java.lang.Integer.toHexString(bytes[n] & 0XFF));
            if (tmp.length() == 1) {
                sb.append("0");
            }
            sb.append(tmp);
        }
        return sb.toString().toUpperCase();
    }

    public static void main(String[] args) {
        String test = encryptHex("47718", new Date().getTime()+"");
        System.out.println(test);
    }