Re: pdf in java Viewing... Not a good experience
- From: Bill Tschumy <bill@xxxxxxxxxxxxxxxxxxx>
- Date: Fri, 10 Jun 2005 16:12:42 GMT
On Thu, 9 Jun 2005 22:53:33 -0500, gbruno wrote
(in article <1118375613.406186.201980@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>):
> I want to display pdf files from within java
>
> 1) I can use getruntime().exec
> BUT I need to know the external pdf viewers name
>
> 2) I can use the java viewer from Adobe 1998
> This crashed wanting com.apple.mrj
> So I paid $26 to Limeware to get the MRJ stubs
> And I get an internal viewer
> BUT it shows an initial Adobe licence screen every time,
> its very slow
> it crashed one time with java heap error
> everytime it closes it tries to write a profile,
> fails and displays an error
> NOT a pleasant experience.
> (if you do want those MRJ stubs, email me, I will send them to you
> dont pay $26 to Limeware)
>
> If I choose option 1, On Windows I must delve into the registry to find
> the default pdf viewer [this seems retrograde, not truly
> WriteOnceRunAnyware]
>
> If Linux How do I find the default pdf handler from within Java?
>
> I personally believe its a waste of time. Better to let the user click
> on pdf files in an external fileviewer.
> But my manager wants my program to show pdfs, and he pays my wage.
>
> Is there an easy way?
> cheers
> gbruno
>
You are going about it the hard way. Look at:
< http://www.javaworld.com/javaworld/javatips/jw-javatip66.html>
This code is austensibly to open a url in a browser, but on Windows it will
open any file type using the application registered for that file type
(including PDF!!).
I have augmented the code to work on Mac OS X. Here is the final version:
import java.io.*;
import java.net.*;
/**
* A simple, static class to display a URL in the system browser.
*
*
*
* Under Unix, the system browser is hard-coded to be 'netscape'.
* Netscape must be in your PATH for this to work. This has been
* tested with the following platforms: AIX, HP-UX and Solaris.
*
*
*
* Under Windows, this will bring up the default browser under windows,
* usually either Netscape or Microsoft IE. The default browser is
* determined by the OS. This has been tested under Windows 95/98/NT.
*
*
*
* Examples:
*
*
* BrowserControl.displayURL("http://www.javaworld.com";)
*
* BrowserControl.displayURL("file://c:\\docs\\index.html")
*
* BrowserContorl.displayURL("file:///user/joe/index.html");
*
*
* Note - you must include the url type -- either "http://"; or "file://".
*
* Taken from JavaWorld Tip #66 by Steven Spencer
*
*/
public class BrowserControl
{
// Used to identify the windows platform.
private static final String WIN_ID = "Windows";
// Used to identify the mac platform.
private static final String MAC_ID = "Mac";
// The default system browser under windows.
private static final String WIN_PATH = "rundll32";
// The flag to display a url.
private static final String WIN_FLAG = "url.dll,FileProtocolHandler";
// The default browser under unix.
private static final String UNIX_PATH = "netscape";
// The flag to display a url.
private static final String UNIX_FLAG = "-remote openURL";
/**
* Display a file in the system browser. If you want to display a
* file, you must include the absolute path name.
*
* @param url the file's url (the url must start with either "http://"; or
* "file://").
*/
public static void displayURL(String url)
{
boolean windows = isWindowsPlatform();
boolean mac = isMacPlatform();
String cmd = null;
// Different OS's and Java versions pass different things as the
// file: url. We need to get it in the form of file:/// for it to
// launch correctly on all platforms.
if (url.indexOf("file:///") == 0)
{
//everything is fine
}
else if (url.indexOf("file://") == 0)
url = Utility.replaceAll("file://", "file:///", url);
else if (url.indexOf("file:/") == 0)
url = Utility.replaceAll("file:/", "file:///", url);
else if (url.indexOf("file:") == 0)
url = Utility.replaceAll("file:", "file:///", url);
if (isMacPlatform())
{
url = Utility.replaceAll(" ", "%20", url);
}
if (url.startsWith("file:"))
url = Utility.replaceAll("?", "%3F", url);
//System.out.println("displaying: " + url);
try
{
if (windows)
{
// cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
cmd = WIN_PATH + " " + WIN_FLAG + " " + url;
Process p = Runtime.getRuntime().exec(cmd);
}
else if (mac)
{
Runtime.getRuntime().exec(new String[] {"open", url });
}
else
{
String browser = System.getProperty("BrowserCmd");
if (browser != null)
{
Runtime.getRuntime().exec(new String[] {(String) browser,
url });
}
else
{
// Under Unix, Netscape has to be running for the
"-remote"
// command to work. So, we try sending the command and
// check for an exit value. If the exit command is 0,
// it worked, otherwise we need to start the browser.
// cmd = 'netscape -remote
openURL(http://www.javaworld.com)'
cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + url + ")";
Process p = Runtime.getRuntime().exec(cmd);
try
{
// wait for exit code -- if it's 0, command worked,
// otherwise we need to start the browser up.
int exitCode = p.waitFor();
if (exitCode != 0)
{
// Command failed, start up the browser
// cmd = 'netscape http://www.javaworld.com'
cmd = UNIX_PATH + " " + url;
p = Runtime.getRuntime().exec(cmd);
}
}
catch(InterruptedException e)
{
System.err.println("Error bringing up browser, cmd='"
+
cmd + "'");
System.err.println("Caught: " + e);
}
}
}
}
catch (IOException e)
{
// couldn't exec browser
System.err.println("Could not invoke browser, command=" + cmd);
System.err.println("Caught: " + e);
}
}
/**
* Try to determine whether this application is running under Windows
* or some other platform by examing the "os.name" property.
*
* @return true if this application is running under a Windows OS
*/
public static boolean isWindowsPlatform()
{
String os = System.getProperty("os.name");
if ( os != null && os.startsWith(WIN_ID))
return true;
else
return false;
}
public static boolean isMacPlatform()
{
String os = System.getProperty("os.name");
if ( os != null && os.startsWith(MAC_ID))
return true;
else
return false;
}
/**
* Simple example.
*/
public static void main(String[] args)
{
displayURL("http://www.javaworld.com";);
}
}
--
Bill Tschumy
Otherwise -- Austin, TX
http://www.otherwise.com
.
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- From: gbruno
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