我尝试从我的Android应用程序访问我的localhost服务器中的jsp页面获得404响应

Question

我有一个主要活动的android项目。 我希望它访问我的localhost服务器中的JSP页面。

我的电脑里有一个tomcat 7，在/ webapps /我有一个名为JSPyDB的文件夹，我的ejemplo.jsp页面存放在那里。（我可以从浏览器访问jsp页面，这样我就可以看到服务器运行完美了） 。

所以这是我的MainMenuActivity：

public class MainMenuActivity extends Activity implements OnClickListener{

private static String DEBUG_TAG1 = "MainMenuA";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 
    setContentView(R.layout.mainmenu);
    findViewById(R.id.my_space_button).setOnClickListener(this);

}
@Override
public void onClick(View v) {
    switch(v.getId()) {
        case R.id.my_space_button:
            ConnectivityManager cM = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo infoNet = cM.getActiveNetworkInfo();
            String url = "http://10.0.2.2:8080/JSPYDB/ejemplo.jsp";
            if(infoNet != null && infoNet.isConnected()){
                //fetch data
                new Task().execute(url);
                Log.d(DEBUG_TAG1,"Able to connect to network ");
            }
            else{
                //error to connect
                Log.d(DEBUG_TAG1,"fail to connect to network ");
            }

            break;
    }
} 
private class Task extends AsyncTask <String, Void, String>{
    @Override
    protected String doInBackground(String... urls){
        try {
            Log.d(DEBUG_TAG1,"do in background download url ");
            return downloadUrl(urls[0]);
            //return "Retrieve page";
        } catch (Exception e) {
            return "Unable to retrieve page";
        }
    }
    @Override
    protected void onPostExecute(String result){
    }

}
private String downloadUrl(String myurl) throws IOException {
    InputStream is = null;
    Log.d(DEBUG_TAG1,"download url: " + myurl);
    // Only display the first 500 characters of the retrieved
    // web page content.
    int len = 500;

    try {
        URL url = new URL(myurl);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        Log.d(DEBUG_TAG1,"create connection to: " + url);
        conn.setReadTimeout(10000 /* milliseconds */);
        conn.setConnectTimeout(15000 /* milliseconds */);
        conn.setRequestMethod("GET");
        conn.setDoInput(true);
        // Starts the query
        conn.connect();
        Log.d(DEBUG_TAG1,"connect()");
        int response = conn.getResponseCode();
        Log.d(DEBUG_TAG1, "The response is: " + response);
        is = conn.getInputStream();

        // Convert the InputStream into a string
        String contentAsString = readIt(is, len);
        return contentAsString;

    // Makes sure that the InputStream is closed after the app is
    // finished using it.
    } finally {
        if (is != null) {
            is.close();
        } 
    }
}
// Reads an InputStream and converts it to a String.
public String readIt(InputStream stream, int len) throws IOException, UnsupportedEncodingException {
    Reader reader = null;
    reader = new InputStreamReader(stream, "UTF-8");        
    char[] buffer = new char[len];
    reader.read(buffer);
    return new String(buffer);
}

}

我得到的回应是404 ......

我在我的网络192.68.1.12尝试了其他网址，比如我的电脑的IP地址。 但仍有404回应。

如果我甚至无法得到好的回应，我在这里失踪了什么？

编辑：这是一个愚蠢的事情。 我的文件夹是JSPyDB，使用JSPYDB时url是错误的。 错字错误。

Answer 1

这是一个愚蠢的事情。 我的文件夹是JSPyDB，使用JSPYDB时url是错误的。

错字错误。