jsp开发微信公众平台

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page import="java.security.MessageDigest" %>
<%@ page import="java.util.Arrays" %>

<%
    String token = "YOUR_TOKEN"; // 替换为你的Token
    String signature = request.getParameter("signature");
    String timestamp = request.getParameter("timestamp");
    String nonce = request.getParameter("nonce");
    String echostr = request.getParameter("echostr");

    // 将token、timestamp、nonce三个参数进行字典序排序
    String[] arr = new String[]{token, timestamp, nonce};
    Arrays.sort(arr);

    // 将三个参数字符串拼接成一个字符串进行sha1加密
    StringBuilder content = new StringBuilder();
    for (String s : arr) {
        content.append(s);
    }
    MessageDigest md = MessageDigest.getInstance("SHA-1");
    byte[] digest = md.digest(content.toString().getBytes());

    // 将字节数组转换为十六进制字符串
    StringBuffer hexstr = new StringBuffer();
    for (byte b : digest) {
        hexstr.append(String.format("%02x", b & 0xff));
    }

    // 验证签名
    if (hexstr.toString().equals(signature)) {
        out.print(echostr); // 验证成功，返回echostr
    } else {
        out.print(""); // 验证失败
    }
%>