关于java:加解密工具类

package com.JUtils.encrypt;

import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

/**
 * DES 加解密工具类
 *
 * @Author:chenssy
 * @date:2016 年 5 月 20 日 下午 5:19:00
 *
 */
class DESUtils {
    /** 默认 key */
    protected final static String KEY = "ScAKC0XhadTHT3Al0QIDAQAB";
    
    /**
     * DES 加密
     * 
     * @author : chenssy
     * @date : 2016 年 5 月 20 日 下午 5:51:37
     *
     * @param data
     *                 待加密字符串
     * @param key
     *                 校验位
     * @return
     */
    @SuppressWarnings("restriction")
    protected static String encrypt(String data,String key) {  
        String encryptedData = null;  
        try {  
            // DES 算法要求有一个可信赖的随机数源  
            SecureRandom sr = new SecureRandom();  
            DESKeySpec deskey = new DESKeySpec(key.getBytes());  
            // 创立一个密匙工厂，而后用它把 DESKeySpec 转换成一个 SecretKey 对象  
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");  
            SecretKey secretKey = keyFactory.generateSecret(deskey);  
            // 加密对象  
            Cipher cipher = Cipher.getInstance("DES");  
            cipher.init(Cipher.ENCRYPT_MODE, secretKey, sr);  
            // 加密，并把字节数组编码成字符串  
            encryptedData = new sun.misc.BASE64Encoder().encode(cipher.doFinal(data.getBytes()));  
        } catch (Exception e) {throw new RuntimeException("加密谬误，错误信息：", e);  
        }  
        return encryptedData;  
    }  
    
    /**
     * DES 解密
     * 
     * @author : chenssy
     * @date : 2016 年 5 月 20 日 下午 5:52:23
     *
     * @param cryptData
     *                         待解密密文
     * @param key
     *                         校验位
     * @return
     */
    @SuppressWarnings("restriction")
    protected static String decrypt(String cryptData,String key) {  
        String decryptedData = null;  
        try {  
            // DES 算法要求有一个可信赖的随机数源  
            SecureRandom sr = new SecureRandom();  
            DESKeySpec deskey = new DESKeySpec(key.getBytes());  
            // 创立一个密匙工厂，而后用它把 DESKeySpec 转换成一个 SecretKey 对象  
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");  
            SecretKey secretKey = keyFactory.generateSecret(deskey);  
            // 解密对象  
            Cipher cipher = Cipher.getInstance("DES");  
            cipher.init(Cipher.DECRYPT_MODE, secretKey, sr);  
            // 把字符串解码为字节数组，并解密  
            decryptedData = new String(cipher.doFinal(new sun.misc.BASE64Decoder().decodeBuffer(cryptData)));  
        } catch (Exception e) {throw new RuntimeException("解密谬误，错误信息：", e);  
        }  
        return decryptedData;  
    }  
         
}

package com.JUtils.encrypt;

import java.security.SecureRandom;

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


/**
 * AES 加解密
 *
 * @Author:chenssy
 * @date:2016 年 5 月 21 日 上午 9:01:41
 */
class AESUtils {
    /** 默认秘钥 */
    protected static final String KEY = "NOPO3nzMD3dndwS0MccuMeXCHgVlGOoYyFwLdS24Im2e7YyhB0wrUsyYf0";
    
    /**
     *  AES 解密
     *
     * @author:chenssy
     * @date : 2016 年 5 月 21 日 上午 9:48:12
     *
     * @param encryptValue
     *                         待解密内容
     * @param key
     *                         秘钥
     * @return
     * @throws Exception
     */
    protected static String decrypt(String encryptValue, String key) throws Exception {return aesDecryptByBytes(base64Decode(encryptValue), key);  
    }
    
    /**
     * AES 加密 
     *
     * @author:chenssy
     * @date : 2016 年 5 月 21 日 上午 9:48:42
     *
     * @param value
     *                     待加密内容
     * @param key
     *                     秘钥
     * @return
     * @throws Exception
     */
    protected static String encrypt(String value, String key) throws Exception {return base64Encode(aesEncryptToBytes(value, key));  
    }  
    
    private static String base64Encode(byte[] bytes){return Base64Utils.encrypt(bytes);  
    }  
      
    @SuppressWarnings("static-access")
    private static byte[] base64Decode(String base64Code) throws Exception{return base64Code == null ? null : new Base64Utils().decrypt(base64Code);  
    }  
      
    private static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {KeyGenerator kgen = KeyGenerator.getInstance("AES");  
        kgen.init(128, new SecureRandom(encryptKey.getBytes()));  
  
        Cipher cipher = Cipher.getInstance("AES");  
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));  
          
        return cipher.doFinal(content.getBytes("utf-8"));  
    }  
      
    private static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {KeyGenerator kgen = KeyGenerator.getInstance("AES");  
        kgen.init(128, new SecureRandom(decryptKey.getBytes()));  
          
        Cipher cipher = Cipher.getInstance("AES");  
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));  
        byte[] decryptBytes = cipher.doFinal(encryptBytes);  
          
        return new String(decryptBytes);  
    }  
    
}