Urgent, but I haven't points...[How can I write a file on the server side using JSP??]

I need a physical file on my server...the following statement can write within the buffer (I thnik) then display from the buffer.

If JSP cannot write file in the server side, any good suggestion??
I need the *.txt file to plot a generic chart.


String path = request.getRealPath(".");
FileWriter fw = new FileWriter(path + "temp.txt");
BufferedWriter bw = new BufferedWriter(fw);

bw.write("110,120,102,130,25000");
bw.newLine();
bw.write("120,130,120,170,26000");
bw.newLine();
bw.write("130,120,102,130,25000");
bw.newLine();
bw.write("140,130,120,170,26000");
bw.newLine();
bw.write("150,120,102,130,25000");
bw.newLine();
bw.write("160,130,120,170,26000");
bw.newLine();

bw.flush();
bw.close();
fw.close();

FileReader fr = new FileReader(path + "temp.txt");
BufferedReader br = new BufferedReader(fr);
String Line = br.readLine();

while(Line != null){
out.println(Line + "<BR>");
Line = br.readLine();
}

<applet
    code=AStockChart.class
     archive="AStockChart.jar"
    name=cchart
    width=460
    height=400 >
    <param name="file" value="temp.txt"  <----------------This need a physical file on harddisk
     <param name="img" value="backgrnd.gif">
     <param name="nbpoint" value="15">
    <PARAM NAME="FONTNAME" VALUE="Arial">
    <PARAM NAME="FONTSIZE" VALUE="10">
    <PARAM NAME="AP" VALUE="l">
</applet>