package com.wetuo.util; import java.security.MessageDigest; /** * 数据加密工具类 * @author wzp * */ public class DataUtil { public static String md5(String str) { StringBuffer buffer = new StringBuffer(); char[] chars = { ‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘, ‘A‘, ‘B‘, ‘C‘, ‘D‘, ‘E‘, ‘F‘ }; byte[] input = str.getBytes(); try { MessageDigest md = MessageDigest.getInstance("MD5"); byte[] bytes = md.digest(input); for (byte b : bytes) { // 高四位后移 按位与 0000 1111 buffer.append(chars[(b >> 4) & 0x0F]); // 低四位直接 按位与 0000 1111 buffer.append(chars[b & 0x0f]); } return buffer.toString(); } catch (Exception e) { // TODO: handle exception } return null; } }
java MD5数据加密工具类
时间: 2024-10-25 11:00:43