微信小程序配置服务器提示验证token失败的解决方法

package com.base.action;

import java.io.PrintWriter;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@RequestMapping("/wechat")
@Controller
public class WechatController {
 private static Logger logger = Logger.getLogger(WechatController.class);
 
 private static String token = "xuejp";
 
 @RequestMapping(value = "/wx.do")
 public void get(HttpServletRequest request, HttpServletResponse response) throws Exception {
 System.out.println("========WechatController========= ");
 logger.info("-----来自微信的请求----");
 
 Enumeration pNames = request.getParameterNames();
 while (pNames.hasMoreElements()) {
 String name = (String) pNames.nextElement();
 String value = request.getParameter(name);
 //查看微信的请求都带了哪些参数
 String log = "name =" + name + " value =" + value;
 logger.error(log);
 }
 
 String signature = request.getParameter("signature");/// 微信加密签名
 String timestamp = request.getParameter("timestamp");/// 时间戳
 String nonce = request.getParameter("nonce"); /// 随机数
 String echostr = request.getParameter("echostr"); // 随机字符串
 PrintWriter out = response.getWriter();
 
 if (checkSignature(signature, timestamp, nonce)) {
 out.print(echostr);
 }
 
 out.print(token);
 
 out.close();
 out = null;
 
 }
 
 /**
 * 校验签名
 */
 public static boolean checkSignature(String signature, String timestamp, String nonce) {
 System.out.println("signature:" + signature + "timestamp:" + timestamp + "nonc:" + nonce);
 String[] arr = new String[] { 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
 System.out.println(tmpStr.equals(signature.toUpperCase()));
 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;
 }
}