Example of reading and writing files in JSP

Example of reading a file
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<% @ Page contenttype = "text/html; charset = gb2312" %>
<%
// Variable Declaration/
Java. Lang. String strfilename; // file name
Java. Io. File objfile; // file object
Java. Io. filereader objfilereader; // read object
Char [] chrbuffer = new char [10]; // Buffer
Int intlength; // number of characters actually read (a Chinese character is a character)

// Set the file name to be read
Strfilename = "D: // test.txt ";

// Create a file object
Objfile = new java. Io. File (strfilename );

// Determine whether a file exists
If (objfile. exists () {// The object exists.
// Create a read object
Objfilereader = new java. Io. filereader (objfile );

// Read the file content
While (intlength = objfilereader. Read (chrbuffer ))! =-1 ){
// Output
Out. Write (chrbuffer, 0, intlength );
}

// Close the read object
Objfilereader. Close ();
}
Else {// the file does not exist
Out. println ("the following file does not exist:" + strfilename );
}
%>
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Example of file writing
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Use the printwriter object to write the text file.

See the following example:

<% @ Page import = "Java. Io. *" %>
<%
String STR = "Print me ";
// Always give the path from root. This way it almost always works.
String nameoftextfile = "/usr/Anil/imp.txt ";
Try {
Printwriter PW = new printwriter (New fileoutputstream (nameoftextfile ));
PW. println (STR );
// Clean up
PW. Close ();
} Catch (ioexception e ){
Out. println (E. getmessage ());
}
%>

Now, open imp.txt to check whether the string "Print me" has been written.

There is another way to mark the file tag of the library with in16, refer to http://sourceforge.net/project? Group_id = 1282.
The syntax of the example is as follows:
<Ext: file action = "Write | append | create | copy | move | Delete | rename | read" from = "<% = myfilename %>">