Write inputStream to file

Hi,
who could give me a short sample code how to write an inputStream or a Reader to a file.
Thanks for your help
Bye

This will help u
http://web2.java.sun.com/docs/books/tutorial/essential/io/filestreams.html

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Using Swing applet to write data to file on SERVER

Hello,
I'm in the process of writing an applet using Swing (SDK v1.4.2). Here's the deal. The JApplet calls a JPanel, which will be used by customers on my site to enter data. I'm adding a <Save> button to the "form" which is supposed to write data to a file on the server (in order to preserve the customer's preferences).
Please note that I am NOT attempting to write data to the customer's hard disk. That requires digital certificates, etc. which I am trying to avoid for now.
Instead, I am using the URL class to access the file:
URL page = new URL("http://www.whatever.com/mycustomers/preferences.txt")
I then use the URLConnection class to establish the connection:
URLConnection conn = this.page.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.connect();
etc...
I've created a text file (preferences.txt) on my web site. Using the classes InputStreamReader, BufferedStreamReader, and StringBuffer, I can successfully read the file into a JOptionPane in my applet.
The problem comes when I try to write data TO this file. I know the file exists because the applet can read it. I've set the permissions on the file to 666. I've got all of the appropriate syntax within a try statment that catches an IOException. I also have JOptionPanes all over the place to let me know where the program is. I've tried different combinations of output streams like BufferedWriter, BufferedOutputStream, StringWriter, but the file does not get updated. When the applet runs, it does not throw any exceptions, not even when I change the URL from "HTTP://www.whatever.com/prefs.txt" to "HTTP:/www.whatever.com/prefs.txt" (only one slash on HTTP, shouldn't I get a MalformedURLException?)
I apologize for all the background, but I thought you might need it. The bottom line is:
1) Can an applet write to a file on a remote server (not local hard disk)?
2) If so, what (if any) caveats are there?
3) Is there a way to check for file existence or be able to create a new file?
4) I'm using the HTTP protocol - is there some restriction that prevents an applet from writing to a file using that protocol? If so, is there a workaround?
5) Assuming that creating/writing a file using the method I've described is possible, what would be the appropriate output streams to use? (Currently, I'm using OutputStreamWriter with BufferedWriter).
I've been struggling with this for a while. Any help/suggestions would be appreciated.
Thanks
P.S. I also posted this message on the Applet development forum, but I've received no response as of yet.

Http servers support PUT as a mechanism to upload data to a specified URL. Get on the other hand which is what most people are familiar with is how you retrieve that data. The basic URLConnection is an abstraction of the Http connection which can be used for GET and POST operations by default based on doInput(true|false).. If you which to use any of the http methods other than GET|POST you will have to cast the URLConnection to HttpURLConnection so you can gain access to the specific Http functionaility that could not be abstracted.
Since you are using a hosting service the chances are that you won't be able to use HTTP PUT on their server. Most servers do not support HTTP PUT without configuring them todo so. Now Apache allows localized config through the .htacess file. It might be possible (keep in mind I am not an apache expert) to configure a particular directory to allow HTTP PUT using this .htacess file it may not be possible. You will have to consult the Apache web server documentation for that answer.
But regardless you can use the HttpURLConnection and the PUT method to send data from your applet to the server. In fact that is the preferred way to do this. If you can not configure your web server to support that method then you will have to develop a Servlet to do it. A servlet has several methods such as doGet(), doPost(), and doPut(). You would override the doPut() method get the URI path create a file and a FileOutputStream to that file, get from the request the inputstream, possibly skip the http headers, and then write byte for byte the incoming data to your OutputStream until you reach the end at which point you would close the OutputStream and send an Http Response of some sort. Typically in HTTP it would be 200 OK plus some web content. You content can be empty so long as your applet recognizes that is what it should expect...
And away you go...

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I my java class, I need to an OutputStream or a Writer to write in a file. The problem is that I am in a webapp.
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InputStream is = this.getClass().getResourceAsStream("RELATIVE_PATH_IN_WEBAPP");
But it doesn't exist a correspondance for the outputstream.
With this code :
Writer writer = new FileWriter("RELATIVE�_PATH_IN_WEBAPP");
I cannot find the file because it looks for my application server relative path.

Ok but I think it doesn't help me.
To explain : I have a servlet that calls a service in a Java class :
public class MyServlet extends HttpServlet{
public void init(){
MyService service = new MyService();
String file = "RELATIVE_PATH_IN_WEBAPP//myfile.xml";
service.createFile(file);
In MyService class :
public void createFile(String file){
XMLWriter writer = new XMLWriter( //dom4j API
new FileWriter(file) );
writer.write( document );
But this doesn't looks for my file in the relative path of the webapp.

How to write data to file Java ME cldc 1.1 midp 2.0?

I newly in java me, please help me.
I make project in NetBeans 7.0.1. and use cldc 1.1 midp 2.0.
I want to write data to the file.
How can I do it?
I try to use FileOutputStream. But it don't exists in java.io
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ByteArrayInputStream, ByteArrayOutputStream, DataInput, DataInputStream, DataOutput, DataOutputStream, InputStream, InputStreamReader, OutputStream, OutputStreamWriter, PrintStream, Reader, Writer.
Why it so short?
And how I can write data to file?
Data can be array of bytes (byte[]) or Object it better.

You must use JSR 75: FileConnection. Please check the following article "Getting Started with the FileConnection APIs":
http://developers.sun.com/mobility/apis/articles/fileconnection/
Be sure to use FileSystemRegistry.listRoots().
And welcome to Java ME development. :)

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Hello, I have to write in a file using the FileConnection API (JME).
So far, I could write it, but I could not find out how to append in the file.
Here is the code:
FileConnection fc = (FileConnection)
Connector.open("file:///test.txt");
OutputStream os = fc.Open(OutputStream);
OutputStreamWriter osw = new OutputStreamWriter(os);
osw.write("test");
How can I add new data at the end of the file?

Well, I really can't find a method I could use, so I read the file and put it in a buffer, then I write it all.
I will let the code for anyone who needs:
+try {+
FileConnection fc = (FileConnection) Connector.open("file:///j9/test.txt");
if (!fc.exists())
fc.create();
InputStream is = fc.openInputStream();
InputStreamReader isr = new InputStreamReader(is);
+char[] c = new char[(int) fc.fileSize()];+
isr.read(c);
OutputStream os = fc.openOutputStream();
String str = textField.getString() ',' + textField1.getString() + '\n';+
os.write(new String(c).getBytes());
os.write(str.getBytes());
os.close();
is.close();
isr.close();
fc.close();
stringItem1.setText("It works");
+}+
+catch (Exception ex) {+
stringItem1.setText("It doesn't work");
+}+

How to create and write in a file

Hello Gurus,
I am creating a file based on the date and time and writing into that. But, I am still getting exception error and all. Kindly, please let me know.
thanks for all the help...j
Error:-
C:\Usage\JavaFiles>java filename "abc"
Exception in thread "main" java.io.FileNotFoundException:Detail09-2003-
03:28:04.doc (The system cannot find the file specified)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:176)
at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
at TowerDetail.main(TowerDetail.java:30)
Code sample:-
import java.io.*;
import java.util.*;
import java.lang.*;
import java.sql.*;
import java.text.*;
public class TowerDetail{
public static void main (String[] args) throws IOException{
String userName = "user";
String passwd = "pwd";
String con_db = "jdbc:odbc:datasource";
String ssn = args[0];
Vector results = new Vector();
Connection con = null;
CallableStatement cstmt = null;
java.util.TimeZone tz = java.util.TimeZone.getTimeZone("EST");
java.util.Date now = new java.util.Date();
DateFormat df = new SimpleDateFormat("MM-dd-yyyy-hh:mm:ss");
df.setTimeZone(tz);
String result = df.format(now);
String fileName = "Detail"+result+".doc";
File inputFile = new File(fileName);
FileOutputStream fos = new FileOutputStream(inputFile);
PrintWriter pw = new PrintWriter(fos);
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}catch (Exception e) {
System.out.println("JDBC Error: "+e.getMessage());
return;
try{
con = DriverManager.getConnection(con_db, userName, passwd);
cstmt = con.prepareCall("{call dbo.sp_usage_detail(?)}");
cstmt.setString(1, ssn.trim());
ResultSet rs = cstmt.executeQuery();
pw.println("Report "+result);
pw.println("------------------------------------------------------------------------------------
while(rs.next()){
.... write in the file...
pw.println("------------------------------------------------------------------------------------
pw.close();
System.out.println("Your file Detail"+result+".doc is ready!!!");
cstmt.close();
con.close();
}catch(SQLException ex){
System.out.println("SQLException: ");
System.out.println(ex.getMessage());
}catch(NullPointerException e){
System.out.println("Null Pointer Exception: ");
System.out.println(e.getMessage());

Now, I got out of the command prompt and reentered. I didn't set any classpath or anything. I have created a subdir \archive in the C:\ and writing an output file [DetailTower.....doc")into that.
The DetailTower.class is in C:\Detail\ProjectClass dirctory.
Now at,
C:\Detail\ProjectClass\java -classpath . DetailTower "abc"
I am getting this error:-
C:\Detail\ProjectClass>java -classpath . DetailTower "999999"
Exception in thread "main" java.io.FileNotFoundException: c:\archive\DetailTower09-10-2003-06:23:40.doc (The system cannot find the file specified)at java.io.FileOutputStream.open(Native Method)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:176)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
        at Detail.main(DetailTower.java:32)

Write to spreadsheet file.vi is storing data in one row only.

The 8 points of data is going into one column in the spreadsheet. In the "Write to spreadsheet file string.vi" how do I write the 8 points to one row for each cycle?
I got this VI from NI's web a couple of years ago and forgot how to modify this part. I usume it is within the write file.vi.
Thank you in advance
Skip

I just reread your original post and the way the "Write to Spreadsheet File.vi" that ships with LV works by default is to put 1D arrays into rows. I read your post backwards and told you how to put the data in a column. Sorry.
In any case, perhaps you need to make sure the Transpose input ISN'T true, and that the delimiter IS a tab.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

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Please help me in solving this problem.
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Jimmy,
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exception
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Hi guys,
I would like some help with saving data in labview 2010 SP1 (base development system). I am using a "Write to measurement fil express VI" inside a while loop and the data out from the DAQmn Read is wired to the signal in of the "Write to measurement fil express VI".
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Raj

Robert,
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WIN7 x64 Home Basic, 0x80070013 when I trying to write or delete files. When I trying to format I can see a message that disk is write protected.
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See 'SignedAppletDemo.java'
http://developer.java.sun.com/developer/technicalArticles/Security/Signed/

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Parallel operations in LabVIEW are very simple. Just code it in parallel and it will work.
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hi,
i have some problem with writing the values into excel file...if \ found then the values after will write the values in next rows...
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Attachments:
Mod 1.vi ‏23 KB
Untitled.png ‏135 KB

The Write to Spreadsheet File is not the same as writing to Excel -- for that, you should use the Report Generation Toolkit (and there have been a number of posts here, as well as examples that ship with LabVIEW).
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ERROR [01S00] [Microsoft][ODBC Excel Driver]Invalid connection string attribute Trusted_Connection
Please help

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Hi am trying to save Data into a write to measurement file vi using a NI PXI 1042Q and DAQ NI PXI-6229 with a real time mode but it is not working but when i run it without uploading it into the PXI it save in to the file please find attached my vi
Attachments:
PWMs.vi ‏130 KB

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Write inputStream to file

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