JAVA工具类-DES加密解密

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import java.security.SecureRandom;

/**
 * @author yunfeng
 * @version V1.0
 * @date 2018-06-07 22:13
 */
public class DesUtil {
    private final static Logger logger = LoggerFactory.getLogger(DesUtil.class);

    /**
     * 加密
     *
     * @param datasource byte[]
     * @param password   String
     * @return byte[]
     */
    public static byte[] encrypt(byte[] datasource, String password) {
        try {
            SecureRandom random = new SecureRandom();
            DESKeySpec desKey = new DESKeySpec(password.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,ENCRYPT_MODE用于将 Cipher 初始化为加密模式的常量
            cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
            //现在，获取数据并加密 正式执行加密操作
            //按单部分操作加密或解密数据，或者结束一个多部分操作
            return cipher.doFinal(datasource);
        } catch (Throwable e) {
            logger.error("DES 加密异常，详情：" + e.toString());
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 解密
     *
     * @param src      byte[]
     * @param password String
     * @return byte[]
     * @throws Exception
     */
    public static byte[] decrypt(byte[] src, String password) 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(password.getBytes());
        // 创建一个密匙工厂
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");//返回实现指定转换的 Cipher 对象
        // 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);
    }

}