2.第一个小程序（微信公众号开发实战）

来源：互联网发布：ubuntu 17.04 163源编辑：程序博客网时间：2024/05/17 08:30

项目结构

这里写图片描述

导入jar包：

dom4j-1.6.1.jar
xstream-1.3.1.jar

话不多说，直接上代码。

TextMessage

package com.jiuzhouchedai.po;public class TextMessage {    private String ToUserName;  //开发者微信号    private String FromUserName;    //发送方帐号（一个OpenID）    private long CreateTime;    //消息创建时间 （整型）    private String MsgType; //text    private String Content; //文本消息内容    private String MsgId;   //消息id，64位整型    public String getToUserName() {        return ToUserName;    }    public void setToUserName(String toUserName) {        ToUserName = toUserName;    }    public String getFromUserName() {        return FromUserName;    }    public void setFromUserName(String fromUserName) {        FromUserName = fromUserName;    }    public long getCreateTime() {        return CreateTime;    }    public void setCreateTime(long createTime) {        CreateTime = createTime;    }    public String getMsgType() {        return MsgType;    }    public void setMsgType(String msgType) {        MsgType = msgType;    }    public String getContent() {        return Content;    }    public void setContent(String content) {        Content = content;    }    public String getMsgId() {        return MsgId;    }    public void setMsgId(String msgId) {        MsgId = msgId;    }}

weixinServlet

package com.jiuzhouchedai.servlet;public class weixinServlet extends HttpServlet {    public void doGet(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");        PrintWriter out=response.getWriter();        if (CheckUtil.checkSignature(signature, timestamp, nonce)) {            out.write(echostr);        }    }    public void doPost(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        request.setCharacterEncoding("UTF-8");        response.setCharacterEncoding("UTF-8");        PrintWriter out=response.getWriter();           try {            Map<String, String> map=MessageUtil.xmlToMap(request);            String toUserName=map.get("ToUserName");            String fromUserName= map.get("FromUserName");            String msgType=map.get("MsgType");            String content=map.get("Content");            String message=null;            if("text".equals(msgType)){                TextMessage  text=new TextMessage();                text.setFromUserName(toUserName);                text.setToUserName(fromUserName);                text.setMsgType("text");                text.setCreateTime(new Date().getTime());                text.setContent("您输入的内容为："+content);                message=MessageUtil.textMessageToXml(text);            }            out.print(message);        } catch (Exception e) {            e.printStackTrace();        }finally{            out.close();        }    }}

CheckUtil

package com.jiuzhouchedai.util;public class CheckUtil {    public static final String token="xxxxx";    public static boolean checkSignature(String signature,String timestamp,String nonce){        String[] arr=new String[]{token, timestamp, nonce};        //字典排序        Arrays.sort(arr);        //生成字符串        StringBuffer content=new StringBuffer();        for (int i = 0; i < arr.length; i++) {            content.append(arr[i]);        }        //sha1加密        String temp = getSha1(content.toString());        return temp.equals(signature);    }      public static String getSha1(String str){            if(str==null||str.length()==0){                return null;            }            char hexDigits[] = {'0','1','2','3','4','5','6','7','8','9',                    'a','b','c','d','e','f'};            try {                MessageDigest mdTemp = MessageDigest.getInstance("SHA1");                mdTemp.update(str.getBytes("UTF-8"));                byte[] md = mdTemp.digest();                int j = md.length;                char buf[] = new char[j*2];                int k = 0;                for (int i = 0; i < j; i++) {                    byte byte0 = md[i];                    buf[k++] = hexDigits[byte0 >>> 4 & 0xf];                    buf[k++] = hexDigits[byte0 & 0xf];                      }                return new String(buf);            } catch (Exception e) {                // TODO: handle exception                return null;            }        }}

MessageUtil

package com.jiuzhouchedai.util;public class MessageUtil {    public static Map<String, String> xmlToMap(HttpServletRequest request) throws Exception{        Map<String, String> map=new HashMap<String, String>();        SAXReader reader=new SAXReader();        InputStream ins = request.getInputStream();        Document doc = reader.read(ins);        Element root = doc.getRootElement();        List<Element> list = root.elements();        for (Element e : list) {            map.put(e.getName(), e.getText());        }        ins.close();        return map;    }    public static String textMessageToXml(TextMessage textMessage){        XStream stream=new XStream();        stream.alias("xml", textMessage.getClass());        return stream.toXML(textMessage);    }}

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">  <display-name>weixintest</display-name>  <servlet>    <description>This is the description of my J2EE component</description>    <display-name>This is the display name of my J2EE component</display-name>    <servlet-name>weixinServlet</servlet-name>    <servlet-class>com.jiuzhouchedai.servlet.weixinServlet</servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>weixinServlet</servlet-name>    <url-pattern>/wx.do</url-pattern>  </servlet-mapping>  <welcome-file-list>    <welcome-file>index.html</welcome-file>    <welcome-file>index.htm</welcome-file>    <welcome-file>index.jsp</welcome-file>    <welcome-file>default.html</welcome-file>    <welcome-file>default.htm</welcome-file>    <welcome-file>default.jsp</welcome-file>  </welcome-file-list></web-app>

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