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JAVA微信开发-新手接入指南

相信很多人对微信开发已经不那么陌生,我也是从一个微信开发的菜鸟经过各种问题的折磨,然后去搜索引擎搜索各种文章阅读,但是基本都是零散的资料,没有一个统一、系统的阐述微信应用如何开发。作者结合自己的实际开发经验,归纳整理出来分享给微信开发的入门者或正在研究的开发者。

这篇文章主要阐述如何搭建一个微信开发平台。古人云:“磨刀不负砍才工”。我们开发应用也需要准备一些必要的条件。

 

 准备工作

 

 1.  下载 Jdk1.7  安装

 2.  下载 Tomcat 7.0

 3.  下载 Myeclipse 6.5

 4.  下载 Json-lib第三方jar . 

 

 

1.      申请一个公网IP地址,发布自己的应用。

例如: 192.168.1.102

 

2.      打开myeclipse 创建一个工程

如下图所示:

  

 

 

 

 

3.  创建一个微信应用接入Servlet类

 

 

 

JAVA实现类 :WeixinServlet  

 

package com.wx.servlet;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.util.Arrays;import java.util.logging.Logger;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import net.sf.json.JSONObject;import net.sf.json.xml.XMLSerializer; /** * @author haibing.xiao * @since jdk1.6 * @version 1.0 */public class WeixinServlet extends HttpServlet{    private Logger log =Logger.getLogger(this.getClass().getName());    private static final long serialVersionUID = 1L;    private   String Token;    private   String echostr;    @Override    protected void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {         connect(request,response);    }    @Override    protected void doPost(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        message(request,response);    }             /**     *@author haibing.xiao     *@return       *@exception      *@param     *      * <p>接入连接生效验证</p>     */    private void connect(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{        log.info("RemoteAddr: "+ request.getRemoteAddr());        log.info("QueryString: "+ request.getQueryString());         if(!accessing(request, response)){             log.info("服务器接入失败.......");             return ;         }        String echostr=getEchostr();        if(echostr!=null && !"".equals(echostr)){                log.info("服务器接入生效..........");                response.getWriter().print(echostr);//完成相互认证        }    }    /**     * @author haibing.xiao     * Date 2013-05-29     * @return boolean     * @exception ServletException, IOException     * @param     *     *<p>用来接收微信公众平台的验证</p>      */    private boolean accessing(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {        String signature = request.getParameter("signature");        String timestamp = request.getParameter("timestamp");        String nonce = request.getParameter("nonce");        String echostr = request.getParameter("echostr");        if( isEmpty(signature)){            return false;        }        if(isEmpty(timestamp)){            return false;        }        if(isEmpty(nonce)){            return false;        }        if(isEmpty(echostr)){            return false;        }        String[] ArrTmp = { Token, timestamp, nonce };        Arrays.sort(ArrTmp);        StringBuffer sb = new StringBuffer();        for (int i = 0; i < ArrTmp.length; i++) {            sb.append(ArrTmp[i]);        }        String pwd = Encrypt(sb.toString());                 log.info("signature:"+signature+"timestamp:"+timestamp+"nonce:"+nonce+"pwd:"+pwd+"echostr:"+echostr);                if(trim(pwd).equals(trim(signature))){            this.echostr =echostr;            return true;        }else{            return false;        }    }    private String Encrypt(String strSrc) {        MessageDigest md = null;        String strDes = null;        byte[] bt = strSrc.getBytes();        try {            md = MessageDigest.getInstance("SHA-1");            md.update(bt);            strDes = bytes2Hex(md.digest()); //to HexString        } catch (NoSuchAlgorithmException e) {            System.out.println("Invalid algorithm.");            return null;        }        return strDes;    }    public String bytes2Hex(byte[] bts) {        String des = "";        String tmp = null;        for (int i = 0; i < bts.length; i++) {            tmp = (Integer.toHexString(bts[i] & 0xFF));            if (tmp.length() == 1) {                des += "0";            }            des += tmp;        }        return des;    }             public String getEchostr(){        return echostr;    }    /**     *@author haibing.xiao     *@return       *@exception ServletException, IOException     *@param     *      * <p>XML组装组件</p>     */     private void message(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{                     InputStream is = request.getInputStream();            // 取HTTP请求流长度            int size = request.getContentLength();            // 用于缓存每次读取的数据            byte[] buffer = new byte[size];            // 用于存放结果的数组            byte[] xmldataByte = new byte[size];            int count = 0;            int rbyte = 0;            // 循环读取            while (count < size) {                 // 每次实际读取长度存于rbyte中                rbyte = is.read(buffer);                 for(int i=0;i<rbyte;i++) {                    xmldataByte[count + i] = buffer[i];                }                count += rbyte;            }            is.close();            String requestStr = new String(xmldataByte, "UTF-8");                                    try{                manageMessage(requestStr,request,response);            }catch(Exception e){                e.printStackTrace();            }                    }          /**     * @author haibing.xiao     * @return      * @exception ServletException, IOException     * @param     *      * <p>业务转发组件</p>     *      */      private void  manageMessage(String requestStr,HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{                        String responseStr;                       try {                 XMLSerializer xmlSerializer=new XMLSerializer();                 JSONObject jsonObject =(JSONObject) xmlSerializer.read(requestStr);                 String event =jsonObject.getString("Event");                 String msgtype =jsonObject.getString("MsgType");                 if("CLICK".equals(event) && "event".equals(msgtype)){ //菜单click事件                     String eventkey =jsonObject.getString("EventKey");                     if("hytd_001".equals(eventkey)){ // hytd_001 这是好友团队按钮的标志值                         jsonObject.put("Content", "欢迎使用好友团队菜单click按钮.");                     }                                     }                 responseStr =creatRevertText(jsonObject);//创建XML                 log.info("responseStr:"+responseStr);                 OutputStream os =response.getOutputStream();                 os.write(responseStr.getBytes("UTF-8"));            }   catch (Exception e) {                e.printStackTrace();            }                }    private String creatRevertText(JSONObject jsonObject){            StringBuffer revert =new StringBuffer();            revert.append("<xml>");            revert.append("<ToUserName><![CDATA["+jsonObject.get("ToUserName")+"]]></ToUserName>");            revert.append("<FromUserName><![CDATA["+jsonObject.get("FromUserName")+"]]></FromUserName>");            revert.append("<CreateTime>"+jsonObject.get("CreateTime")+"</CreateTime>");            revert.append("<MsgType><![CDATA[text]]></MsgType>");            revert.append("<Content><![CDATA["+jsonObject.get("Content")+"]]></Content>");            revert.append("<FuncFlag>0</FuncFlag>");            revert.append("</xml>");            return revert.toString();        }    @Override    public void init() throws ServletException {        Token="test123";    }         private boolean isEmpty(String str){        return null ==str || "".equals(str) ? true :false;    }    private String trim(String str){        return null !=str  ? str.trim() : str;    }    }


4.   本地部署应用  访问http://localhost:端口号/上下文/wenxin  

 

 

 

5  .申请成为开发者

 

 

访问 http://mp.weixin.qq.com   ,开启开发者模式。填入URL和taken,申请成功,如下所示:

 

 

填入URL:http://外网IP/TestWeixin/weixin 【必须80端】

填入token :  test123【需要与代码中的token保持一致,Token的长度是有限制的,根据笔者的经验最好不超过10个字符。】

 

 

JAVA微信开发-新手接入指南