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   源码介绍

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这是一个微信服务端收发消息接口示例

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;

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

import demo.process.WechatProcess;
/**
 * 微信服务端收发消息接口
 *
 * @author pamchen-1
 *
 */
public class WechatServlet extends HttpServlet {

    /**
     * The doGet method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to get.
     *
     * @param request
     *            the request send by the client to the server
     * @param response
     *            the response send by the server to the client
     * @throws ServletException
     *             if an error occurred
     * @throws IOException
     *             if an error occurred
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");

        /** 读取接收到的xml消息 */
        StringBuffer sb = new StringBuffer();
        InputStream is = request.getInputStream();
        InputStreamReader isr = new InputStreamReader(is, "UTF-8");
        BufferedReader br = new BufferedReader(isr);
        String s = "";
        while ((s = br.readLine()) != null) {
            sb.append(s);
        }
        String xml = sb.toString();    //次即为接收到微信端发送过来的xml数据

        String result = "";
        /** 判断是否是微信接入激活验证，只有首次接入验证时才会收到echostr参数，此时需要把它直接返回 */
        String echostr = request.getParameter("echostr");
        if (echostr != null && echostr.length() > 1) {
            result = echostr;
        } else {
            //正常的微信处理流程
            result = new WechatProcess().processWechatMag(xml);
        }

        try {
            OutputStream os = response.getOutputStream();
            os.write(result.getBytes("UTF-8"));
            os.flush();
            os.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * The doPost method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to
     * post.
     *
     * @param request
     *            the request send by the client to the server
     * @param response
     *            the response send by the server to the client
     * @throws ServletException
     *             if an error occurred
     * @throws IOException
     *             if an error occurred
     */
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }

}