des加密解密数据
1、加密数据，返回string类型的数据：
public static String encrypt(String data) { //对string进行BASE64Encoder转换
byte[] bt = encryptByKey(data.getBytes(), password);
BASE64Encoder base64en = new BASE64Encoder();
String strs = new String(base64en.encode(bt));
return strs;
}
2、解密数据，返回string类型的数据：
public static String decryptor(String data) throws Exception { //对string进行BASE64Encoder转换
sun.misc.BASE64Decoder base64en = new sun.misc.BASE64Decoder();
byte[] bt = decrypt(base64en.decodeBuffer(data), password);
String strs = new String(bt);
return strs;
}
3、加密:
private static byte[] encryptByKey(byte[] datasource, String key) {
try{
SecureRandom random = new SecureRandom();
DESKeySpec desKey = new DESKeySpec(key.getBytes());
//创建一个密匙工厂，然后用它把DESKeySpec转换成
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(desKey);
//Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance("DES");
//用密匙初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
//现在，获取数据并加密
//正式执行加密操作
return cipher.doFinal(datasource);
}catch(Throwable e){
e.printStackTrace();
}
return null;
}
4、解密:
private static byte[] decrypt(byte[] src, String key) throws Exception {
// DES算法要求有一个可信任的随机数源
SecureRandom random = new SecureRandom();
// 创建一个DESKeySpec对象
DESKeySpec desKey = new DESKeySpec(key.getBytes());
// 创建一个密匙工厂
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
// 将DESKeySpec对象转换成SecretKey对象
SecretKey securekey = keyFactory.generateSecret(desKey);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance("DES");
// 用密匙初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, random);
// 真正开始解密操作
return cipher.doFinal(src);
}
5、测试：
private static String password = "9588888888880288";
//测试
public static void main(String args[]) {
//待加密内容
String str = "12";
String result = DESUtil.encrypt(str);
BASE64Encoder base64en = new BASE64Encoder();
// String strs = new String(base64en.encode(result));
System.out.println("加密后："+result);
//直接将如上内容解密
try {
String decryResult = DESUtil.decryptor(result);
System.out.println("解密后："+new String(decryResult));
} catch (Exception e1) {
e1.printStackTrace();
}
}
6、显示结果:
