java版，微信公众平台新手入门第一节

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java版，微信公众平台新手入门第一节

java版微信公众平台开发

配置开发者中心

完成关注时内容回复

配置开发者中心然后启用配置

新建项目配置一个servlet进行接收微信发的消息

web.xml

复制代码

WechatServlet.java

public void doGet(HttpServletRequest request, HttpServletResponseresponse)throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
String encryptType = request.getParameter("encrypt_type");
/** 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(); //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 {
if("".equals(xml)){
request.getRequestDispatcher("res.jsp").forward(request,response);
return;
}
//解析微信发来的xml数据
System.out.println("自己的业务逻辑处理");
}
try {
OutputStream os = response.getOutputStream();
os.write(result.getBytes("UTF-8"));
os.flush();
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public void doPost(HttpServletRequest request, HttpServletResponseresponse)
throws ServletException, IOException {
doGet(request, response);
}

复制代码

WeChatProcess.java

/**
* 解析处理xml
*/
public String processWechatMag(String xml){
/** 解析xml数据 */
ReceiveXmlEntity xmlEntity = new ReceiveXmlProcess().getMsgEntity(xml);
String result = "";
//点击事件
if("event".equals(xmlEntity.getMsgType())){
//点击关注
if("subscribe".equals(xmlEntity.getEvent())){
result = "欢迎关注";
}
//取消关注
if("unsubscribe".equals(xmlEntity.getEvent())){
result = "取消关注";
}
}
result = newFormatXmlProcess().formatXmlAnswer(xmlEntity.getFromUserName(),xmlEntity.getToUserName(), result);
return result;
}

复制代码

FormatXmlProcess.java

/**
* 封装文字类的返回消息
* @param to
* @param from
* @param content
* @return
*/
public String formatXmlAnswer(String to, String from, Stringcontent) {
StringBuffer sb = new StringBuffer();
Date date = new Date();
sb.append("<xml><ToUserName><![CDATA[");
sb.append(to);
sb.append("]]></ToUserName><FromUserName><![CDATA[");
sb.append(from);
sb.append("]]></FromUserName><CreateTime>");
sb.append(date.getTime());
sb.append("</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[");
sb.append(content);
sb.append("]]></Content><FuncFlag>0</FuncFlag></xml>");
return sb.toString();
}