How to write results to a text file ????? [Archive]

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yna54

February 5th, 2002, 02:56 PM

I am trying to append the results like this :

to a text file, here is what I wrote :

........
System.out.println("Type " + connection.getContentType());
save("Type " + connection.getContentType());
System.out.println("Length " + connection.getContentLength());
save("Length " + connection.getContentLength());
System.out.println("Length " + connection.getHeaderField(1));
save("Length " + connection.getHeaderField(1));
System.out.println("Length " + connection.getHeaderField(2));

System.out.println("Length " + connection.getHeaderField(3));

System.out.println("Length " + connection.getHeaderField(4));
}

public static void save(String data) {
try {
//String text = textField.getText();
byte b[] = data.getBytes();
String outputFileName = "text.txt";
FileOutputStream out = new FileOutputStream(outputFileName);
out.write(b);
out.close();
} catch(java.io.IOException e) {
System.out.println("Cannot write to text.txt");
}

}
....

but it does not append.

Norm

February 5th, 2002, 06:26 PM

What is supposed to be appended to what? I don't know from your program comments what the code is supposed to do.

Why do you expect data to be written to a file to be appended to an existing file vs creating a new file?
Does your documentation say that?

Read the doc for the classes that do file ouput and you'll find one that has a constructor with a second argument that specifies that the output is to be appended.

Norm

yna54

February 6th, 2002, 09:50 AM

Here is the result of my program :

C:\>javac MajidPortScanner4.java

C:\>java MajidPortScanner4
Test for ip 155.108.117.068 .......................................
current port scanning is :80
HTTP/1.1 400 Bad Request
Server: Microsoft-IIS/5.0
Date: Wed, 06 Feb 2002 14:39:50 GMT
Content-Type: text/html
Content-Length: 87

<html><head><title>Error</title></head><body>The parameter is incorrect. </body>
</html>
A server is listening on port 80 of dev-gisg.statestr.com
current port scanning is :8080
The remote host dev-gisg.statestr.com is not listening on this port

Test for ip 155.108.117.012 ..........................................
current port scanning is :80
HTTP/1.1 400 Bad Request
Server: Microsoft-IIS/5.0
Date: Wed, 06 Feb 2002 14:39:51 GMT
Content-Type: text/html
Content-Length: 87

<html><head><title>Error</title></head><body>The parameter is incorrect. </body>
</html>
A server is listening on port 80 of MIL2WWDS40
current port scanning is :8080
The remote host MIL2WWDS40 is not listening on this port

Test for ip 155.108.117.82 ................................................
current port scanning is :80
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<HTML><HEAD>
<TITLE>400 Bad Request</TITLE>
</HEAD><BODY>
<H1>Bad Request</H1>
Your browser sent a request that this server could not understand.<P>
Invalid URI in request GET HTTP/1.0
<P>
<HR>
<ADDRESS>Apache/1.3.22 Server at mil2wwds011 Port 80</ADDRESS>
</BODY></HTML>
A server is listening on port 80 of MIL2WWDS011
current port scanning is :8080
The remote host MIL2WWDS011 is not listening on this port

Test for ip 155.108.117.064 .................................................
current port scanning is :80
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<HTML><HEAD>
<TITLE>400 Bad Request</TITLE>
</HEAD><BODY>
<H1>Bad Request</H1>
Your browser sent a request that this server could not understand.<P>
Invalid URI in request GET HTTP/1.0
<P>
<HR>
<ADDRESS>Apache/1.3.22 Server at MIL2WWDS13.statestr.com Port 80</ADDRESS>
</BODY></HTML>
A server is listening on port 80 of MIL2WWDS13.statestr.com
current port scanning is :8080
HTTP/1.0 404 Not Found
Content-Type: text/html
Content-Length: 163
Servlet-Engine: Tomcat Web Server/3.2.3 (JSP 1.1; Servlet 2.2; Java 1.3.0_02; Wi
ndows 2000 5.0 x86; java.vendor=Sun Microsystems Inc.)

<head><title>Not Found (404)</title></head>
<body><h1>Not Found (404)</h1>
<b>Original request:</b> HTTP/1.0

<b>Not found request:</b> HTTP/1.0</body>
A server is listening on port 8080 of MIL2WWDS13.statestr.com
C:\>

AND here is where I disply this data to the console and in the same time to a file :

...........
String fname = "zfile.txt";
try {
......
FileWriter writer = new FileWriter(fname);
while ((theLine = br.readLine()) != null) {
System.out.println(theLine);
writer.write(theLine, 0, theLine.length());
//writer.close();
}
writer.close();
}
catch (MalformedURLException e) {
System.out.println( " not a valid URL");
}
catch (IOException e) {
System.out.println(e);
}
.........

BUT when I checked the text file zfile.txt I only found this :

HTTP/1.0 404 Not FoundContent-Type: text/htmlContent-Length: 163Servlet-Engine: Tomcat Web Server/3.2.3 (JSP 1.1; Servlet 2.2; Java 1.3.0_02; Windows 2000 5.0 x86; java.vendor=Sun Microsystems Inc.)<head><title>Not Found (404)</title></head><body><h1>Not Found (404)</h1><b>Original request:</b> HTTP/1.0

<b>Not found request:</b> HTTP/1.0</body>

Where is the other data ??

Norm

February 6th, 2002, 06:07 PM

Is it possible that your program calls the code shown more than once? Each time it is executed it will create a new version of the file.

To see how to use a class like FileWriter, I suggest that you write a small standalone program that you can make changes to until you understand how to use it. Then move that code to your program.

Norm