java往服务器写文件失败,将文件上传到服务器，java.net.ProtocolException：读取响应后无法写入请求主体...

服务器写文件失败,将文件上传到服务器，java.net.ProtocolException：读取响应后无法写入请求主体..."/>

java往服务器写文件失败,将文件上传到服务器，java.net.ProtocolException：读取响应后无法写入请求主体...

我想从Android应用上传文件到服务器。我尝试这个，但仍然无法上传文件到服务器。在我的java中有一个错误。将文件上传到服务器，java.ProtocolException：读取响应后无法写入请求主体

public class UploadFileActivity extends AppCompatActivity implements View.OnClickListener{

private static final int PICK_FILE_REQUEST = 1;

private static final String TAG = MainActivity.class.getSimpleName();

private String selectedFilePath;

private String SERVER_URL = ".php";

ImageView ivAttachment;

Button bUpload;

TextView tvFileName;

ProgressDialog dialog;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.activity_upload_file);

ivAttachment = (ImageView) findViewById(R.id.ivAttachment);

bUpload = (Button) findViewById(R.id.b_upload);

tvFileName = (TextView) findViewById(R.id.tv_file_name);

ivAttachment.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

showFileChooser();

}

});

bUpload.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

if(selectedFilePath != null){

dialog = ProgressDialog.show(UploadFileActivity.this,"","Uploading File...",true);

new Thread(new Runnable() {

@Override

public void run() {

uploadFile(selectedFilePath);

}

}).start();

}else{

Toast.makeText(UploadFileActivity.this,"Please choose a File First",Toast.LENGTH_SHORT).show();

}

}

});

}

@Override

public void onClick(View v) {

}

private void showFileChooser() {

Intent intent = new Intent();

intent.setType("*/*");

intent.setAction(Intent.ACTION_GET_CONTENT);

startActivityForResult(Intent.createChooser(intent,"Choose File to Upload.."),PICK_FILE_REQUEST);

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

if(resultCode == Activity.RESULT_OK){

if(requestCode == PICK_FILE_REQUEST){

if(data == null){

//no data present

return;

}

Uri selectedFileUri = data.getData();

if(Build.VERSION.SDK_INT >= 19) {

selectedFilePath = FilePath.getPath(this, selectedFileUri);

} else {

selectedFilePath = FilePath.getSmartFilePath(this, selectedFileUri);

}

Log.i(TAG,"Selected File Path:" + selectedFilePath);

if(selectedFilePath != null && !selectedFilePath.equals("")){

tvFileName.setText(selectedFilePath);

}else{

Toast.makeText(this,"Cannot upload file to server",Toast.LENGTH_SHORT).show();

}

}

}

}

public int uploadFile(final String selectedFilePath){

int serverResponseCode = 0;

HttpURLConnection connection;

DataOutputStream dataOutputStream;

String lineEnd = "\r\n";

String twoHyphens = "--";

final String boundary = "*****";

int bytesRead,bytesAvailable,bufferSize;

byte[] buffer;

int maxBufferSize = 1 * 1024 * 1024;

File selectedFile = new File(selectedFilePath);

String[] parts = selectedFilePath.split("/");

String fileName = parts[parts.length-1];

String[] separate = fileName.split(Pattern.quote("."));

final String fileNameDoang = separate[0];

final String fileType = separate[1];

if (!selectedFile.isFile()){

dialog.dismiss();

runOnUiThread(new Runnable() {

@Override

public void run() {

tvFileName.setText("Source File Doesn't Exist: " + selectedFilePath);

}

});

return 0;

}else{

try{

FileInputStream fileInputStream = new FileInputStream(selectedFile);

URL url = new URL(SERVER_URL);

connection = (HttpURLConnection) url.openConnection();

connection.setDoInput(true);//Allow Inputs

connection.setDoOutput(true);//Allow Outputs

connection.setUseCaches(false);//Don't use a cached Copy

connection.setRequestMethod("POST");

connection.setRequestProperty("Connection", "Keep-Alive");

connection.setRequestProperty("ENCTYPE", "multipart/form-data");

connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);

connection.setRequestProperty("uploaded_file",selectedFilePath);

int sizeFile = connection.getContentLength();

dataOutputStream = new DataOutputStream(connection.getOutputStream());

dataOutputStream.writeBytes(twoHyphens + boundary + lineEnd);

dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""

+ selectedFilePath + "\"" + lineEnd);

dataOutputStream.writeBytes(lineEnd);

bytesAvailable = fileInputStream.available();

bufferSize = Math.min(bytesAvailable,maxBufferSize);

buffer = new byte[bufferSize];

bytesRead = fileInputStream.read(buffer,0,bufferSize);

while (bytesRead > 0){

//write the bytes read from inputstream

dataOutputStream.write(buffer,0,bufferSize);

bytesAvailable = fileInputStream.available();

bufferSize = Math.min(bytesAvailable,maxBufferSize);

bytesRead = fileInputStream.read(buffer,0,bufferSize);

}

dataOutputStream.writeBytes(lineEnd);

dataOutputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

serverResponseCode = connection.getResponseCode();

String serverResponseMessage = connection.getResponseMessage();

Log.i(TAG, "Server Response is: " + serverResponseMessage + ": " + serverResponseCode);

if(serverResponseCode == 200){

runOnUiThread(new Runnable() {

@Override

public void run() {

tvFileName.setText("File Upload completed.\n\n File Name : \n\n" + fileNameDoang + "File Type" + fileType);

}

});

}

fileInputStream.close();

dataOutputStream.flush();

dataOutputStream.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

runOnUiThread(new Runnable() {

@Override

public void run() {

Toast.makeText(UploadFileActivity.this,"File Not Found",Toast.LENGTH_SHORT).show();

}

});

} catch (MalformedURLException e) {

e.printStackTrace();

Toast.makeText(UploadFileActivity.this, "URL error!", Toast.LENGTH_SHORT).show();

} catch (IOException e) {

e.printStackTrace();

Toast.makeText(UploadFileActivity.this, "Cannot Read/Write File!", Toast.LENGTH_SHORT).show();

}

dialog.dismiss();

return serverResponseCode;

}

}

}

获取filepath我把另一个java放进去。这是警告和错误：

09-30 20:44:50.766 9855-10872/com.sintask.android W/System.err: java.ProtocolException: cannot write request body after response has been read

09-30 20:44:50.766 9855-10872/com.sintask.android W/System.err: at com.android.okhttp.internal.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:223)

09-30 20:44:50.766 9855-10872/com.sintask.android W/System.err: at com.sintask.android.ui.UploadFileActivity.uploadFile(UploadFileActivity.java:195)

09-30 20:44:50.766 9855-10872/com.sintask.android W/System.err: at com.sintask.android.ui.UploadFileActivity$2$1.run(UploadFileActivity.java:66)

09-30 20:44:50.766 9855-10872/com.sintask.android W/System.err: at java.lang.Thread.run(Thread.java:818)

09-30 20:44:50.766 9855-10872/com.sintask.android E/AndroidRuntime: FATAL EXCEPTION: Thread-5234

Process: com.sintask.android, PID: 9855

java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

at android.os.Handler.(Handler.java:200)

2016-09-30

wee.ryo

+0

@MWeisner编辑被拒绝。这里的问题不是如何处理它，而是如何防止它。 –