微信公众平台Token验证

package com.zjn.util; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.Arrays; import com.zjn.constants.Constant; /** * 请求校验工具类 * */ public class SignUtil { /** * 验证签名 * * @param signature * @param timestamp * @param nonce * @return */ public static boolean checkSignature(String signature, String timestamp, String nonce) { String[] arr = new String[] { Constant.TOKEN, timestamp, nonce }; // 将token、timestamp、nonce三个参数进行字典序排序 Arrays.sort(arr); StringBuilder content = new StringBuilder(); for (int i = 0; i < arr.length; i++) { content.append(arr[i]); } MessageDigest md = null; String tmpStr = null; try { md = MessageDigest.getInstance("SHA-1"); // 将三个参数字符串拼接成一个字符串进行sha1加密 byte[] digest = md.digest(content.toString().getBytes()); tmpStr = byteToStr(digest); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } content = null; // 将sha1加密后的字符串可与signature对比，标识该请求来源于微信 return tmpStr != null ? tmpStr.equals(signature.toUpperCase()) : false; } /** * 将字节数组转换为十六进制字符串 * * @param byteArray * @return */ private static String byteToStr(byte[] byteArray) { String strDigest = ""; for (int i = 0; i < byteArray.length; i++) { strDigest += byteToHexStr(byteArray[i]); } return strDigest; } /** * 将字节转换为十六进制字符串 * * @param mByte * @return */ private static String byteToHexStr(byte mByte) { char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; char[] tempArr = new char[2]; tempArr[0] = Digit[(mByte >>> 4) & 0X0F]; tempArr[1] = Digit[mByte & 0X0F]; String s = new String(tempArr); return s; } }