DES加密: des是对称加密,加密和解密需要相同的秘钥,它的密码最长56位,必须是8的倍数,秘钥越长,越安全.
package com.trm.util.encrypt;import java.security.SecureRandom;import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;/**
* <p>加密/解密
* <p>
* @author
*
*/
public class Encryption { /**
* DES密钥
* 注意:DES加密和解密过程中,密钥长度都必须是8的倍数,最长为56位
*/
private static final String key = "12345678"; /**
* DES加密
* @param str
* @return
*/
@SuppressWarnings("restriction")
public static String encrypt(String str) {
String encryptStr = "";
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
encryptStr = new sun.misc.BASE64Encoder().encode(cipher.doFinal(str.getBytes()));
}catch(Throwable e){
e.printStackTrace();
}
return encryptStr;
} /**
* DES解密
* @param str
* @return
*/
@SuppressWarnings("restriction")
public static String decrypt(String str) {
String decryptStr = "";
try {
// 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
decryptStr = new String(cipher.doFinal(new sun.misc.BASE64Decoder().decodeBuffer(str)));
} catch (Exception e) {
throw new RuntimeException("解密错误,错误信息:", e);
}
return decryptStr;
} public static void main(String[] args) {
String jdbcPassword = "123"; //String password = decrypt(jdbcPassword);
System.out.println(encrypt(jdbcPassword));
}}