Android HttpURLConnect輸入流和文件寫入

我正在工作的Android 1.6應用程序不工作，我正在聯繫RESTful服務器來下載JSON對象以將數據導入到應用程序。
清單文件有用戶權限對於互聯網和寫入外部存儲。
雖然我不確定我的權限是否正常。
需要發生的事情是PUT請求需要通過對象控件的JSON字符串轉到服務器。服務器更新控制對象並將其傳回。
我需要從控制對象中取出一個字段並將其保存到SD卡上的文件中。我做了什麼錯，或者我在哪裏可以找到更好的辦法？
網絡代碼是從Java應用程序中移植出來的，我認爲它在線路InputStream in = conn.getInputStream();處死去。Android HttpURLConnect輸入流和文件寫入

Gson gson = new Gson(); 

    try{ 
     String uriAddress = "serveraddress"; 
     URI uri = new URI(uriAddress); 
     URL url = uri.toURL(); 
     HttpURLConnection conn = (HttpURLConnection)url.openConnection(); 
     conn.setDoOutput(true); 
     conn.setRequestMethod("PUT"); 
     conn.setRequestProperty("Content-Type", "application/json"); 
     OutputStream out = conn.getOutputStream(); 
     ObjectOutputStream objOut = new ObjectOutputStream(out); 
     String putRequest = gson.toJson(control); 
     objOut.writeObject(putRequest); 
     out.flush(); 
     int x = conn.getResponseCode(); 
     out.close(); 
     InputStream in = conn.getInputStream(); 
     ObjectInputStream objIn = new ObjectInputStream(in); 
     String jsonString = (String) objIn.readObject(); 
     control = gson.fromJson(jsonString, WordToPictureMatchingDataTransferControl.class); 
    }catch(Exception e){ 
     Log.e("Net", e.getMessage()); 
    } 

    try { 
     FileOutputStream fOut = openFileOutput("/sdcard/CAT/wtpm/wtpm.dat", MODE_WORLD_READABLE); 
     OutputStreamWriter osw = new OutputStreamWriter(fOut); 
     //osw.write(gson.toJson(control.getWtpmdtArray())); 
     osw.write("It Worked"); 
     osw.close(); 
     fOut.close(); 
    } catch (Exception e){ 
     Log.e("File", e.getMessage()); 
    }

下面是從執行棧跟蹤

03-16 23:01:15.105: ERROR/Net(23700): six8a.rdg.ac.uk/192.100.154.8:8080 - Connection refused 
03-16 23:01:15.105: ERROR/Net(23700): six8a.rdg.ac.uk/192.100.154.8:8080 - Connection refused 
03-16 23:01:15.105: WARN/System.err(23700): java.net.ConnectException: six8a.rdg.ac.uk/192.100.154.8:8080 - Connection refused 
03-16 23:01:15.115: WARN/System.err(23700):  at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:254) 
03-16 23:01:15.115: WARN/System.err(23700):  at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:533) 
03-16 23:01:15.115: WARN/System.err(23700):  at java.net.Socket.connect(Socket.java:1055) 
03-16 23:01:15.115: WARN/System.err(23700):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:62) 
03-16 23:01:15.115: WARN/System.err(23700):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionPool.get(HttpConnectionPool.java:88) 
03-16 23:01:15.115: WARN/System.err(23700):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getHTTPConnection(HttpURLConnectionImpl.java:927) 
03-16 23:01:15.115: WARN/System.err(23700):  at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:909) 
03-16 23:01:15.126: WARN/System.err(23700):  at uk.ac.reading.sse.mz014227.cat.CAT.updateExercises(CAT.java:123) 
03-16 23:01:15.126: WARN/System.err(23700):  at uk.ac.reading.sse.mz014227.cat.CAT.onOptionsItemSelected(CAT.java:92) 
03-16 23:01:15.126: WARN/System.err(23700):  at android.app.Activity.onMenuItemSelected(Activity.java:2202) 
03-16 23:01:15.126: WARN/System.err(23700):  at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:739) 
03-16 23:01:15.126: WARN/System.err(23700):  at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:158) 
03-16 23:01:15.126: WARN/System.err(23700):  at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855) 
03-16 23:01:15.126: WARN/System.err(23700):  at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:545) 
03-16 23:01:15.126: WARN/System.err(23700):  at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122) 
03-16 23:01:15.126: WARN/System.err(23700):  at android.view.View$PerformClick.run(View.java:8817) 
03-16 23:01:15.126: WARN/System.err(23700):  at android.os.Handler.handleCallback(Handler.java:587) 
03-16 23:01:15.126: WARN/System.err(23700):  at android.os.Handler.dispatchMessage(Handler.java:92) 
03-16 23:01:15.126: WARN/System.err(23700):  at android.os.Looper.loop(Looper.java:144) 
03-16 23:01:15.126: WARN/System.err(23700):  at android.app.ActivityThread.main(ActivityThread.java:4937) 
03-16 23:01:15.126: WARN/System.err(23700):  at java.lang.reflect.Method.invokeNative(Native Method) 
03-16 23:01:15.135: WARN/System.err(23700):  at java.lang.reflect.Method.invoke(Method.java:521) 
03-16 23:01:15.135: WARN/System.err(23700):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
03-16 23:01:15.135: WARN/System.err(23700):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
03-16 23:01:15.135: WARN/System.err(23700):  at dalvik.system.NativeStart.main(Native Method) 
03-16 23:01:15.135: ERROR/File(23700): File /sdcard/CAT/wtpm/wtpm.dat contains a path separator 
03-16 23:01:15.135: ERROR/File(23700): File /sdcard/CAT/wtpm/wtpm.dat contains a path separator 
03-16 23:01:15.135: WARN/System.err(23700): java.lang.IllegalArgumentException: File /sdcard/CAT/wtpm/wtpm.dat contains a path separator 
03-16 23:01:15.135: WARN/System.err(23700):  at android.app.ContextImpl.makeFilename(ContextImpl.java:1641) 
03-16 23:01:15.135: WARN/System.err(23700):  at android.app.ContextImpl.openFileOutput(ContextImpl.java:415) 
03-16 23:01:15.135: WARN/System.err(23700):  at android.content.ContextWrapper.openFileOutput(ContextWrapper.java:158) 
03-16 23:01:15.135: WARN/System.err(23700):  at uk.ac.reading.sse.mz014227.cat.CAT.updateExercises(CAT.java:147) 
03-16 23:01:15.146: WARN/System.err(23700):  at uk.ac.reading.sse.mz014227.cat.CAT.onOptionsItemSelected(CAT.java:92) 
03-16 23:01:15.146: WARN/System.err(23700):  at android.app.Activity.onMenuItemSelected(Activity.java:2202) 
03-16 23:01:15.146: WARN/System.err(23700):  at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:739) 
03-16 23:01:15.146: WARN/System.err(23700):  at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:158) 
03-16 23:01:15.146: WARN/System.err(23700):  at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855) 
03-16 23:01:15.146: WARN/System.err(23700):  at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:545) 
03-16 23:01:15.146: WARN/System.err(23700):  at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122) 
03-16 23:01:15.146: WARN/System.err(23700):  at android.view.View$PerformClick.run(View.java:8817) 
03-16 23:01:15.146: WARN/System.err(23700):  at android.os.Handler.handleCallback(Handler.java:587) 
03-16 23:01:15.146: WARN/System.err(23700):  at android.os.Handler.dispatchMessage(Handler.java:92) 
03-16 23:01:15.146: WARN/System.err(23700):  at android.os.Looper.loop(Looper.java:144) 
03-16 23:01:15.146: WARN/System.err(23700):  at android.app.ActivityThread.main(ActivityThread.java:4937) 
03-16 23:01:15.146: WARN/System.err(23700):  at java.lang.reflect.Method.invokeNative(Native Method) 
03-16 23:01:15.146: WARN/System.err(23700):  at java.lang.reflect.Method.invoke(Method.java:521) 
03-16 23:01:15.146: WARN/System.err(23700):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
03-16 23:01:15.146: WARN/System.err(23700):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
03-16 23:01:15.146: WARN/System.err(23700):  at dalvik.system.NativeStart.main(Native Method)

校正碼是

Gson gson = new Gson(); 

    String jsonString = ""; 
    String encoding = "UTF-8"; 

    try{ 
     String uriAddress = "address"; 
     URI uri = new URI(uriAddress); 
     URL url = uri.toURL(); 
     HttpURLConnection conn = (HttpURLConnection)url.openConnection(); 
     conn.setDoOutput(true); 
     conn.setRequestMethod("PUT"); 
     conn.setRequestProperty("Content-Type", "application/json"); 
     OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream()); 
     String putRequest = gson.toJson(control); 
     Log.d("Gson", gson.toJson(control)); 
     out.write(putRequest); 
     out.flush(); 
     int x = conn.getResponseCode(); 
     Log.d("Repsonse Code", "" + x); 
     out.close(); 
     InputStream in = conn.getInputStream(); 
     StringWriter writer = new StringWriter(); 
     IOUtils.copy(in, writer, encoding); 
     jsonString = writer.toString(); 
    }catch(Exception e){ 
     Log.e("Net", e.getMessage()); 
     Log.e("Net", e.getLocalizedMessage()); 
     e.printStackTrace(); 
    } 
    Log.e("Gson2", jsonString); 
    control = gson.fromJson(jsonString, WordToPictureMatchingDataTransferControl.class); 

    File file = new File("/sdcard/CAT/wtpm.dat"); 

    FileOutputStream binOutFile; 
    ObjectOutputStream objOut; 

    // initialise FileOutputStream 
    try { 
     binOutFile = new FileOutputStream(file); 
     objOut = new ObjectOutputStream(binOutFile); 
     objOut.writeObject(control.getWtpmdtArray()); 
     objOut.close(); 
     binOutFile.close(); 
    } catch (Exception e) { 
     // if exception warn and return 
     Log.e("File", e.getLocalizedMessage()); 
     Log.e("File", e.getMessage()); 
     e.printStackTrace(); 
    } 

}

來源

2011-03-16 Thaddeus Aid

當你說「我認爲這是垂死在該行的InputStream在= conn.getInputStream（）;」你什麼意思？應用程序部隊是否關閉？或者只是不按預期行事？如果是強制關閉，如果您發佈logcat的輸出，我們將更容易提供幫助。 – FoamyGuy 2011-03-16 21:08:53

logcat不發佈任何內容。我不得不逐行強制進行佈局更改，以顯示它有多遠。我可以在該行之前進行佈局更改，如果在該行後面進行佈局更改，則不會更改佈局。所以我認爲它正在拋出一個異常，而不是logcat，但我找不出原因。 – 2011-03-16 21:19:21

似乎glassfish RESTful服務器拒絕連接 – 2011-03-16 23:11:48

GSON GSON =新GSON（）;

String jsonString = ""; 
String encoding = "UTF-8"; 

try{ 
    String uriAddress = "address"; 
    URI uri = new URI(uriAddress); 
    URL url = uri.toURL(); 
    HttpURLConnection conn = (HttpURLConnection)url.openConnection(); 
    conn.setDoOutput(true); 
    conn.setRequestMethod("PUT"); 
    conn.setRequestProperty("Content-Type", "application/json"); 
    OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream()); 
    String putRequest = gson.toJson(control); 
    Log.d("Gson", gson.toJson(control)); 
    out.write(putRequest); 
    out.flush(); 
    int x = conn.getResponseCode(); 
    Log.d("Repsonse Code", "" + x); 
    out.close(); 
    InputStream in = conn.getInputStream(); 
    StringWriter writer = new StringWriter(); 
    IOUtils.copy(in, writer, encoding); 
    jsonString = writer.toString(); 
}catch(Exception e){ 
    Log.e("Net", e.getMessage()); 
    Log.e("Net", e.getLocalizedMessage()); 
    e.printStackTrace(); 
} 
Log.e("Gson2", jsonString); 
control = gson.fromJson(jsonString, WordToPictureMatchingDataTransferControl.class); 

File file = new File("/sdcard/CAT/wtpm.dat"); 

FileOutputStream binOutFile; 
ObjectOutputStream objOut; 

// initialise FileOutputStream 
try { 
    binOutFile = new FileOutputStream(file); 
    objOut = new ObjectOutputStream(binOutFile); 
    objOut.writeObject(control.getWtpmdtArray()); 
    objOut.close(); 
    binOutFile.close(); 
} catch (Exception e) { 
    // if exception warn and return 
    Log.e("File", e.getLocalizedMessage()); 
    Log.e("File", e.getMessage()); 
    e.printStackTrace(); 
}

}

來源

2016-03-04 00:42:48

Android HttpURLConnect輸入流和文件寫入

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