利用3DES实现加密解密的Java代码
采用ECB，补位模式为：PKCS5
import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; /** * 项目名称：**** * 类名称：ThreeDES * 类描述： 3des 加密工具类 * @version 1.0 * */ public class ThreeDES { //key 根据实际情况对应的修改 private final byte[] keybyte="123456788765432112345678".getBytes(); //keybyte为加密密钥，长度为24字节 private static final String Algorithm = "DESede"; //定义 加密算法,可用 DES,DESede,Blowfish private SecretKey deskey; ///生成密钥 public ThreeDES(){ deskey = new SecretKeySpec(keybyte, Algorithm); } //加密 public byte[] encrypt(byte[] data){ try { Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, deskey); return cipher.doFinal(data); } catch (Exception ex) { //加密失败，打日志 ex.printStackTrace(); } return null; } //解密 public byte[] decrypt(byte[] data){ try { Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE,deskey); return cipher.doFinal(data); } catch (Exception ex) { //解密失败，打日志 ex.printStackTrace(); } return null; } public static void main(String[] args) throws Exception { ThreeDES des=new ThreeDES(); String req ="135|一二|10100001|410883198501285014|||||1|2|"; // String req1 ="<?xml version=\"1.0\" encoding=\"UTF-8\"?><service><head><field name=\"spdtrancode\">11111</field><field name=\"spdtranserno\">CM0172061308908f4dc995222321f6ecb888</field><field name=\"spdressys\">2001</field><field name=\"spdresdate\">20141223</field><field name=\"spdrestime\">153606</field><field name=\"spdtranstate\">S</field><field name=\"spderrocode\"></field><field name=\"spderrormsg\"></field></head><body><field name=\"spdcheckrslt\">000000</field></body></service>"; String toreq =toHexString(req); System.err.println("十六进制报文===="+toreq); byte [] srcData=req.toString().getBytes("GBK"); byte[] encryptData=des.encrypt(srcData); System.out.println("密文："); if(encryptData!=null){ for(int i=0;i<encryptData.length;i++){ String hex=Integer.toHexString(encryptData[i]); if(hex.length()>1) System.out.print(hex.substring(hex.length()-2)+" "); else System.out.print("0"+hex+" "); } } System.out.println(""); System.out.println("明文："); } // 转化字符串为十六进制编码 public static String toHexString(String s) { String str = ""; for (int i = 0; i < s.length(); i++) { int ch = (int) s.charAt(i); String s4 = Integer.toHexString(ch); str = str + s4; } return str; } }