小程序开发与公众号用户关联推送消息(五)+ 10月更文挑战第20天

package weixin.util.wxservlet;

import java.io.IOException;
import java.io.PrintWriter;

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

public class WxServlet extends HttpServlet{

public WxServlet() {
    // TODO Auto-generated constructor stub
}

/* (non-Javadoc)
 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
 */
@Override
protected 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();  
    // 通过检验signature对请求进行校验，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;  
}

/* (non-Javadoc)
 * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
 */
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    // TODO Auto-generated method stub
    super.doPost(req, resp);
}

}