Convert Text File to String in java

Question

i have a written a code to send a text file by converting it into string and sending it into a web service. Please can someone tell me other available methods for sending the string as stream to Web Service.

public class MainActivity extends Activity { Button b1; String s; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); b1=(Button)findViewById(R.id.button1); b1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { File upfile=new File("sdcard/text/testfile.txt"); try { FileInputStream fin=new FileInputStream(upfile); byte[] buffer= new byte[(int)upfile.length()]; new DataInputStream(fin).readFully(buffer); fin.close(); s=new String(buffer,"UTF-8"); System.out.print(buffer); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } // TODO Auto-generated method stub Toast.makeText(MainActivity.this, s, 20).show(); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; } }

Dipak Keshariya · Accepted Answer · 2012-11-21 07:49:57Z

try this.

public void mReadJsonData() { try { File f = new File("sdcard/text/testfile.txt"); FileInputStream is = new FileInputStream(f); int size = is.available(); byte[] buffer = new byte[size]; is.read(buffer); is.close(); String text = new String(buffer); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }

Hulk · Accepted Answer · 2012-11-21 07:39:41Z

Use this code to read the data from file and get it into string and do your process ahead according to your need--

File upfile=new File("sdcard/text/testfile.txt"); try { final BufferedReader reader = new BufferedReader(new FileReader(upfile)); String encoded = ""; try { String line; while ((line = reader.readLine()) != null) { encoded += line; } } finally { reader.close(); } System.out.print(encoded); } catch (final Exception e) { }

You should use StringBuilder instead of string concatenation inside loops.
I am taking a text file and sending it to web service,Hence is it fine send the value like this
The file encoding is that of the current platform; better use, as you did, an InputStreamReader(FileInputStream, "UTF-8"). Also encoded += line + "\n"; or so, as readLine strips the line ending. Better use from Apache commons io FileUtils.readFileToString if possible.

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