DES加密解密Java工具

package com.lirongyun.master.Desi.util; import com.sun.org.apache.xml.internal.security.utils.Base64; import javax.crypto.Cipher; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import javax.crypto.spec.IvParameterSpec; import java.security.Key; import java.security.spec.AlgorithmParameterSpec; /** * @author Samuel * @email h_yu0126@163.com * @date 2018年7月18日 * @QQ 879600310 */ public class DESEncrypt { /** * 加密 * * @param key * @param data * @return * @throws Exception */ public static String encode(String key, String data) { try { DESKeySpec dks = new DESKeySpec(key.getBytes()); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); // key的长度不能够小于8位字 Key secretKey = keyFactory.generateSecret(dks); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(key.getBytes());// 向量 AlgorithmParameterSpec paramSpec = iv; cipher.init(Cipher.ENCRYPT_MODE, secretKey, paramSpec); byte[] bytes = cipher.doFinal(data.getBytes("utf-8")); String s = Base64.encode(bytes); return s; } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); return ""; } } /** * 解密 * * @param key * @param xml * @return * @throws Exception */ public static byte[] decode(String key, byte[] data) throws Exception { try { DESKeySpec dks = new DESKeySpec(key.getBytes()); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); // key的长度不能够小于8位字节 Key secretKey = keyFactory.generateSecret(dks); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(key.getBytes()); AlgorithmParameterSpec paramSpec = iv; cipher.init(Cipher.DECRYPT_MODE, secretKey, paramSpec); byte[] bs = cipher.doFinal(data); return bs; } catch (Exception e) { throw new Exception(e); } } /** * 获取编码后的utf-8 * * @param key * @param data * @return * @throws Exception */ public static String decodeValueUTf8(String key, String data) { byte[] datas; String value = null; try { data = data.replaceAll(" ", "+"); datas = decode(key, Base64.decode(data)); value = new String(datas, "utf-8"); } catch (Exception e) { e.printStackTrace(); return "error"; } return value; } }