1:确保填写的URL可以成功访问

2:在对应的接口填写如下代码


/**
* @description 微信公众号服务器配置校验token
* @author: liyinlong
* @date 2019-05-09 9:38
* @return
*/
@ApiOperation("微信公众号服务器配置校验token")
@RequestMapping("/checkToken")
public void checkToken(HttpServletRequest request,HttpServletResponse response){
//token验证代码段
try{
log.info("请求已到达,开始校验token");
if (StringUtils.isNotBlank(request.getParameter("signature"))) {
String signature = request.getParameter("signature");
String timestamp = request.getParameter("timestamp");
String nonce = request.getParameter("nonce");
String echostr = request.getParameter("echostr");
log.info("signature[{}], timestamp[{}], nonce[{}], echostr[{}]", signature, timestamp, nonce, echostr);
if (SignUtil.checkSignature(signature, timestamp, nonce)) {
log.info("数据源为微信后台,将echostr[{}]返回!", echostr);
response.getOutputStream().println(echostr);
}
}
}catch (IOException e){
log.error("校验出错");
e.printStackTrace();
}
}

SignUtil:

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;

public class SignUtil {
private static String token = "demo20190509";

/**
* 校验签名
* @param signature 签名
* @param timestamp 时间戳
* @param nonce 随机数
* @return 布尔值
*/
public static boolean checkSignature(String signature,String timestamp,String nonce){
String checktext = null;
if (null != signature) {
//对ToKen,timestamp,nonce 按字典排序
String[] paramArr = new String[]{token,timestamp,nonce};
Arrays.sort(paramArr);
//将排序后的结果拼成一个字符串
String content = paramArr[0].concat(paramArr[1]).concat(paramArr[2]);

try {
MessageDigest md = MessageDigest.getInstance("SHA-1");
//对接后的字符串进行sha1加密
byte[] digest = md.digest(content.toString().getBytes());
checktext = byteToStr(digest);
} catch (NoSuchAlgorithmException e){
e.printStackTrace();
}
}
//将加密后的字符串与signature进行对比
return checktext !=null ? checktext.equals(signature.toUpperCase()) : false;
}

/**
* 将字节数组转化我16进制字符串
* @param byteArrays 字符数组
* @return 字符串
*/
private static String byteToStr(byte[] byteArrays){
String str = "";
for (int i = 0; i < byteArrays.length; i++) {
str += byteToHexStr(byteArrays[i]);
}
return str;
}

/**
* 将字节转化为十六进制字符串
* @param myByte 字节
* @return 字符串
*/
private static String byteToHexStr(byte myByte) {
char[] Digit = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
char[] tampArr = new char[2];
tampArr[0] = Digit[(myByte >>> 4) & 0X0F];
tampArr[1] = Digit[myByte & 0X0F];
String str = new String(tampArr);
return str;
}

}

源码可参考:​​https://github.com/LongYil/wxutils/​