欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  微信小程序

JAVA微信开发新手必看的接入指南介绍

程序员文章站 2022-04-13 21:45:46
...
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:

JAVA微信开发新手必看的接入指南介绍

3. 创建一个微信应用接入Servlet类

JAVA微信开发新手必看的接入指南介绍

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

JAVA微信开发新手必看的接入指南介绍

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:

JAVA微信开发新手必看的接入指南介绍

以上就是JAVA微信开发新手必看的接入指南介绍的详细内容,更多请关注其它相关文章!

相关标签: JAVA微信开发