public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 微信加密签名
String signature = request.getParameter("signature");
// 时间戳
String timestamp = request.getParameter("timestamp");
// 随机数
String nonce = request.getParameter("nonce");
// 随机字符串
String echostr = request.getParameter("echostr");
PrintWriter out = response.getWriter();
// 请求校验，若校验成功则原样返回 echostr，表示接入成功，否则接入失败
if (SignUtil.checkSignature(signature, timestamp, nonce)) {
out.print(echostr);
}
out.close();
out = null;
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 将请求、响应的编码均设置为 UTF-8 (防止中文乱码)
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
// 接收参数：微信加密签名、时间戳、随机数
String signature = request.getParameter("signature");
String timestamp = request.getParameter("timestamp");
String nonce = request.getParameter("nonce");
PrintWriter out = response.getWriter();
// 请求校验
if (SignUtil.checkSignature(signature, timestamp, nonce)) {
// 调用核心服务类接收处理请求
String respXml = CoreService.processRequest(request);
out.print(respXml);
}
out.close();
out = null;
}