WeixinControllerSupport.java

package com.github.sd4324530.fastweixin.servlet;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * 微信公众平台交互操作基类，提供几乎所有微信公众平台交互方式
 * 基于springmvc框架，方便使用此框架的项目集成
 *
 * @author peiyu
 */
@Controller
public abstract class WeixinControllerSupport extends WeixinSupport {
	
    /**
     * 绑定微信服务器
     *
     * @param request 请求
     * @return 响应内容
     */
    @RequestMapping(method = RequestMethod.GET)
    @ResponseBody
    protected final String bind(HttpServletRequest request) {
        if (isLegal(request)) {
            //绑定微信服务器成功
            return request.getParameter("echostr");
        } else {
            //绑定微信服务器失败
            return "";
        }
    }

    /**
     * 微信消息交互处理
     *
     * @param request http 请求对象
     * @param response http 响应对象
     * @throws ServletException 异常
     * @throws IOException      IO异常
     */
    @RequestMapping(method = RequestMethod.POST)
    protected final void process(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        if (isLegal(request)) {
            String result = processRequest(request);
            //设置正确的 content-type 以防止中文乱码
            response.setContentType("text/xml;charset=UTF-8");
            PrintWriter writer = response.getWriter();
            writer.write(result);
            writer.close();
        }
    }
}