所需的RegId：java.io.FileNotFoundException：GCMRegId.txt（系统找不到指定的文件）

Question

I have written a program to implement Google Cloud Messaging in android using jsp . 我编写了一个程序，使用jsp在android中实现Google Cloud Messaging。 Got the reference from here ( http://javapapers.com/android/google-cloud-messaging-gcm-for-android-and-push-notifications/ ) I am not able to run on server when i try to run program in my eclipse it gives me GCMRegId.txt missing error. 从这里获得了参考（ http://javapapers.com/android/google-cloud-messaging-gcm-for-android-and-push-notifications/ ）当我尝试在Windows中运行程序时，我无法在服务器上运行我的日食给了我GCMRegId.txt丢失的错误。 Here are the code: 这是代码：

 GCMNotification.java

@WebServlet("/GCMNotification")
public class GCMNotification extends HttpServlet {

private static final String GOOGLE_SERVER_KEY = "AIzaSyDA5dlLInMsasJEUTIHV0u7maB82MCasdU";
static final String MESSAGE_KEY = "message";    

public GCMNotification() {
    super();
}

protected void doGet(HttpServletRequest request,
        HttpServletResponse response) throws ServletException, IOException {
    doPost(request, response);

}

protected void doPost(HttpServletRequest request,
        HttpServletResponse response) throws ServletException, IOException {


    Result result = null;

    String share = request.getParameter("shareRegId");

    // GCM RedgId of Android device to send push notification
    String regId = "APA91bG6cLX8OYyZDRypuRq6uodZ9PuMfiql9k6K66i9hZFnS5xr-QmT13nRozGQ10KXNmcMqbsLCVUIS9joGiOPasdfghjklp_AmH2iNs1YVqY3IYzgHoQ";
    if (share != null && !share.isEmpty()) {
        regId = request.getParameter("regId");
        PrintWriter writer = new PrintWriter("GCMRegId.txt");
        writer.println(regId);
        writer.close();
        request.setAttribute("pushStatus", "GCM RegId Received.");
        request.getRequestDispatcher("index.jsp")
                .forward(request, response);
    } else {

        try {
            BufferedReader br = new BufferedReader(new FileReader(
                    "GCMRegId.txt"));
            regId = br.readLine();
            br.close();
            String userMessage = request.getParameter("message");
            Sender sender = new Sender(GOOGLE_SERVER_KEY);
            Message message = new Message.Builder().timeToLive(30)
                    .delayWhileIdle(true).addData(MESSAGE_KEY, userMessage).build();
            System.out.println("regId: " + regId);
            result = sender.send(message, regId, 1);
            request.setAttribute("pushStatus", result.toString());
        } catch (IOException ioe) {
            ioe.printStackTrace();
            request.setAttribute("pushStatus",
                    "RegId required: " + ioe.toString());
        } catch (Exception e) {
            e.printStackTrace();
            request.setAttribute("pushStatus", e.toString());
        }
        request.getRequestDispatcher("index.jsp")
                .forward(request, response);
    }
}

JSP page: index.jsp JSP页面：index.jsp

  <head>
 </head>
 <body>

<h1>Google Cloud Messaging (GCM) Server in Java</h1>
 <%
String pushStatus = "";
Object pushStatusObj = request.getAttribute("pushStatus");

if (pushStatusObj != null) {
    pushStatus = pushStatusObj.toString();
}
 %>
<form action="GCMNotification" method="post">

    <div>
          <textarea rows="2" name="message" cols="23"
          placeholder="Message to transmit via GCM"></textarea>
    </div>
    <div>
        <input type="submit" value="Send Push Notification via GCM" />
    </div>
</form>
<p>
    <h3>
        <%=pushStatus%>
    </h3>
</p>

It always gives me error like RegId required: java.io.FileNotFoundException: GCMRegId.txt (The system cannot find the file specified) how can i resolve that error??? 它总是给我类似所需的RegId的错误：java.io.FileNotFoundException：GCMRegId.txt（系统找不到指定的文件）我该如何解决该错误？

Answer 1

Hey Guys i solved that problem. 嗨，我解决了这个问题。 GCMRegId.txt file generate automatically. GCMRegId.txt文件自动生成。 Does not make manually that file. 不手动制作该文件。

Or if you dont want to make GCMRegId.txt file simply remove from your code and and pass the DeviceId to the regID(string) and remove unused code. 或者，如果您不想制作GCMRegId.txt文件，只需从代码中删除，然后将DeviceId传递给regID（string）并删除未使用的代码。

you will get your output. 您将获得输出。 thanks. 谢谢。

所需的RegId：java.io.FileNotFoundException：GCMRegId.txt（系统找不到指定的文件）

问题描述

1 个解决方案

解决方案1
0 已采纳 2015-11-27 09:36:01

所需的RegId：java.io.FileNotFoundException：GCMRegId.txt（系统找不到指定的文件）

问题描述

1 个解决方案

解决方案1 0 已采纳 2015-11-27 09:36:01

解决方案1
0 已采纳 2015-11-27 09:36:01