Åbne Browser med Java!

Du kan bruge følgende klasse til det:

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class BrowserLauncher {
    private static int jvm;
    private static Object browser;
    private static boolean loadedWithoutErrors;
    private static Class mrjFileUtilsClass;
    private static Class mrjOSTypeClass;
    private static Class macOSErrorClass;
    /** The com.apple.MacOS.AEDesc class */
    private static Class aeDescClass;
    /** The <init>(int) method of com.apple.MacOS.AETarget */
    private static Constructor aeTargetConstructor;
    /** The <init>(int, int, int) method of com.apple.MacOS.AppleEvent */
    private static Constructor appleEventConstructor;
    /** The <init>(String) method of com.apple.MacOS.AEDesc */
    private static Constructor aeDescConstructor;
    /** The findFolder method of com.apple.mrj.MRJFileUtils */
    private static Method findFolder;
    /** The getFileType method of com.apple.mrj.MRJOSType */
    private static Method getFileType;
    /** The makeOSType method of com.apple.MacOS.OSUtils */
    private static Method makeOSType;
    /** The putParameter method of com.apple.MacOS.AppleEvent */
    private static Method putParameter;
    /** The sendNoReply method of com.apple.MacOS.AppleEvent */
    private static Method sendNoReply;
    /** Actually an MRJOSType pointing to the System Folder on a Macintosh */
    private static Object kSystemFolderType;
    /** The keyDirectObject AppleEvent parameter type */
    private static Integer keyDirectObject;
    /** The kAutoGenerateReturnID AppleEvent code */
    private static Integer kAutoGenerateReturnID;
    /** The kAnyTransactionID AppleEvent code */
    private static Integer kAnyTransactionID;
    /** JVM constant for MRJ 2.0 */
    private static final int MRJ_2_0 = 0;
    /** JVM constant for MRJ 2.1 or later */
    private static final int MRJ_2_1 = 1;
    /** JVM constant for any Windows NT JVM */
    private static final int WINDOWS_NT = 2;
    /** JVM constant for any Windows 9x JVM */
    private static final int WINDOWS_9x = 3;
    /** JVM constant for any other platform */
    private static final int OTHER = -1;
    /**
    * The file type of the Finder on a Macintosh.  Hardcoding "Finder" would keep non-U.S. English
    * systems from working properly.
    */
    private static final String FINDER_TYPE = "FNDR";
    /**
    * The creator code of the Finder on a Macintosh, which is needed to send AppleEvents to the
    * application.
    */
    private static final String FINDER_CREATOR = "MACS";
    /** The name for the AppleEvent type corresponding to a GetURL event. */
    private static final String GURL_EVENT = "GURL";
    /**
    * The first parameter that needs to be passed into Runtime.exec() to open the default web
    * browser on Windows.
    */
    private static final String FIRST_WINDOWS_PARAMETER = "/c";
    /** The second parameter for Runtime.exec() on Windows. */
    private static final String SECOND_WINDOWS_PARAMETER = "start";
    /**
    * The shell parameters for Netscape that opens a given URL in an already-open copy of Netscape
    * on many command-line systems.
    */
    private static final String NETSCAPE_OPEN_PARAMETER_START = " -remote 'openURL(";
    private static final String NETSCAPE_OPEN_PARAMETER_END = ")'";
    /**
    * The message from any exception thrown throughout the initialization process.
    */
    private static String errorMessage;
    /**
    * An initialization block that determines the operating system and loads the necessary
    * runtime data.
    */
    static {
        loadedWithoutErrors = true;
        String osName = System.getProperty("os.name");
        if ("Mac OS".equals(osName)) {
            String mrjVersion = System.getProperty("mrj.version");
            String majorMRJVersion = mrjVersion.substring(0, 3);
            try {
                double version = Double.valueOf(majorMRJVersion).doubleValue();
                if (version == 2) {
                    jvm = MRJ_2_0;
                } else if (version >= 2.1) {
                    // For the time being, assume that all post-2.0 versions of MRJ work the same
                    jvm = MRJ_2_1;
                } else {
                    loadedWithoutErrors = false;
                    errorMessage = "Unsupported MRJ version: " + version;
                }
            } catch (NumberFormatException nfe) {
                loadedWithoutErrors = false;
                errorMessage = "Invalid MRJ version: " + mrjVersion;
            }
        } else if (osName.startsWith("Windows")) {
            if (osName.indexOf("9") != -1) {
                jvm = WINDOWS_9x;
            } else {
                jvm = WINDOWS_NT;
            }
        } else {
            jvm = OTHER;
        }

        if (loadedWithoutErrors) {    // if we haven't hit any errors yet
            loadedWithoutErrors = loadClasses();
        }
    }

    /**
    * This class should never be instantiated; this just ensures so.
    */
    private BrowserLauncher() { }

    /**
    * Called by a static initializer to load any classes, fields, and methods required at runtime
    * to locate the user's web browser.
    * @return <code>true</code> if all intialization succeeded
    *            <code>false</code> if any portion of the initialization failed
    */
    private static boolean loadClasses() {
        switch (jvm) {
            case MRJ_2_0:
                try {
                    Class aeTargetClass = Class.forName("com.apple.MacOS.AETarget");
                    macOSErrorClass = Class.forName("com.apple.MacOS.MacOSError");
                    Class osUtilsClass = Class.forName("com.apple.MacOS.OSUtils");
                    Class appleEventClass = Class.forName("com.apple.MacOS.AppleEvent");
                    Class aeClass = Class.forName("com.apple.MacOS.ae");
                    aeDescClass = Class.forName("com.apple.MacOS.AEDesc");

                    aeTargetConstructor = aeTargetClass.getDeclaredConstructor(new Class [] { int.class });
                    appleEventConstructor = appleEventClass.getDeclaredConstructor(new Class[] { int.class, int.class, aeTargetClass, int.class, int.class });
                    aeDescConstructor = aeDescClass.getDeclaredConstructor(new Class[] { String.class });

                    makeOSType = osUtilsClass.getDeclaredMethod("makeOSType", new Class [] { String.class });
                    putParameter = appleEventClass.getDeclaredMethod("putParameter", new Class[] { int.class, aeDescClass });
                    sendNoReply = appleEventClass.getDeclaredMethod("sendNoReply", new Class[] { });

                    Field keyDirectObjectField = aeClass.getDeclaredField("keyDirectObject");
                    keyDirectObject = (Integer) keyDirectObjectField.get(null);
                    Field autoGenerateReturnIDField = appleEventClass.getDeclaredField("kAutoGenerateReturnID");
                    kAutoGenerateReturnID = (Integer) autoGenerateReturnIDField.get(null);
                    Field anyTransactionIDField = appleEventClass.getDeclaredField("kAnyTransactionID");
                    kAnyTransactionID = (Integer) anyTransactionIDField.get(null);
                } catch (ClassNotFoundException cnfe) {
                    errorMessage = cnfe.getMessage();
                    return false;
                } catch (NoSuchMethodException nsme) {
                    errorMessage = nsme.getMessage();
                    return false;
                } catch (NoSuchFieldException nsfe) {
                    errorMessage = nsfe.getMessage();
                    return false;
                } catch (IllegalAccessException iae) {
                    errorMessage = iae.getMessage();
                    return false;
                }
                break;
            case MRJ_2_1:
                try {
                    mrjFileUtilsClass = Class.forName("com.apple.mrj.MRJFileUtils");
                    mrjOSTypeClass = Class.forName("com.apple.mrj.MRJOSType");
                    Field systemFolderField = mrjFileUtilsClass.getDeclaredField("kSystemFolderType");
                    kSystemFolderType = systemFolderField.get(null);
                    findFolder = mrjFileUtilsClass.getDeclaredMethod("findFolder", new Class[] { mrjOSTypeClass });
                    getFileType = mrjFileUtilsClass.getDeclaredMethod("getFileType", new Class[] { File.class });
                } catch (ClassNotFoundException cnfe) {
                    errorMessage = cnfe.getMessage();
                    return false;
                } catch (NoSuchFieldException nsfe) {
                    errorMessage = nsfe.getMessage();
                    return false;
                } catch (NoSuchMethodException nsme) {
                    errorMessage = nsme.getMessage();
                    return false;
                } catch (SecurityException se) {
                    errorMessage = se.getMessage();
                    return false;
                } catch (IllegalAccessException iae) {
                    errorMessage = iae.getMessage();
                    return false;
                }
                break;
        }
        return true;
    }

    /**
    * Attempts to locate the default web browser on the local system.  Caches results so it
    * only locates the browser once for each use of this class per JVM instance.
    * @return The browser for the system.  Note that this may not be what you would consider
    *            to be a standard web browser; instead, it's the application that gets called to
    *            open the default web browser.  In some cases, this will be a non-String object
    *            that provides the means of calling the default browser.
    */
    private static Object locateBrowser() {
        if (browser != null) {
            return browser;
        }
        switch (jvm) {
            case MRJ_2_0:
                try {
                    Integer finderCreatorCode = (Integer) makeOSType.invoke(null, new Object[] { FINDER_CREATOR });
                    Object aeTarget = aeTargetConstructor.newInstance(new Object[] { finderCreatorCode });
                    Integer gurlType = (Integer) makeOSType.invoke(null, new Object[] { GURL_EVENT });
                    Object appleEvent = appleEventConstructor.newInstance(new Object[] { gurlType, gurlType, aeTarget, kAutoGenerateReturnID, kAnyTransactionID });
                    // Don't set browser = appleEvent because then the next time we call
                    // locateBrowser(), we'll get the same AppleEvent, to which we'll already have
                    // added the relevant parameter. Instead, regenerate the AppleEvent every time.
                    // There's probably a way to do this better; if any has any ideas, please let
                    // me know.
                    return appleEvent;
                } catch (IllegalAccessException iae) {
                    browser = null;
                    errorMessage = iae.getMessage();
                    return browser;
                } catch (InstantiationException ie) {
                    browser = null;
                    errorMessage = ie.getMessage();
                    return browser;
                } catch (InvocationTargetException ite) {
                    browser = null;
                    errorMessage = ite.getMessage();
                    return browser;
                }
            case MRJ_2_1:
                File systemFolder;
                try {
                    systemFolder = (File) findFolder.invoke(null, new Object[] { kSystemFolderType });
                } catch (IllegalArgumentException iare) {
                    browser = null;
                    errorMessage = iare.getMessage();
                    return browser;
                } catch (IllegalAccessException iae) {
                    browser = null;
                    errorMessage = iae.getMessage();
                    return browser;
                } catch (InvocationTargetException ite) {
                    browser = null;
                    errorMessage = ite.getTargetException().getClass() + ": " + ite.getTargetException().getMessage();
                    return browser;
                }
                String[] systemFolderFiles = systemFolder.list();
                // Avoid a FilenameFilter because that can't be stopped mid-list
                for(int i = 0; i < systemFolderFiles.length; i++) {
                    try {
                        File file = new File(systemFolder, systemFolderFiles[i]);
                        if (!file.isFile()) {
                            continue;
                        }
                        Object fileType = getFileType.invoke(null, new Object[] { file });
                        if (FINDER_TYPE.equals(fileType.toString())) {
                            browser = file.toString();    // Actually the Finder, but that's OK
                            return browser;
                        }
                    } catch (IllegalArgumentException iare) {
                        browser = browser;
                        errorMessage = iare.getMessage();
                        return null;
                    } catch (IllegalAccessException iae) {
                        browser = null;
                        errorMessage = iae.getMessage();
                        return browser;
                    } catch (InvocationTargetException ite) {
                        browser = null;
                        errorMessage = ite.getTargetException().getClass() + ": " + ite.getTargetException().getMessage();
                        return browser;
                    }
                }
                browser = null;
                break;
            case WINDOWS_NT:
                browser = "cmd.exe";
                break;
            case WINDOWS_9x:
                browser = "command.com";
                break;
            case OTHER:
            default:
                browser = "netscape";
                break;
        }
        return browser;
    }

    /**
    * Attempts to open the default web browser to the given URL.
    * @param url The URL to open
    * @throws IOException If the web browser could not be located or does not run
    */
    public static void openURL(String url) throws IOException {
        if (!loadedWithoutErrors) {
            throw new IOException("Exception in finding browser: " + errorMessage);
        }
        Object browser = locateBrowser();
        if (browser == null) {
            throw new IOException("Unable to locate browser: " + errorMessage);
        }
        switch (jvm) {
            case MRJ_2_0:
                Object aeDesc = null;
                try {
                    aeDesc = aeDescConstructor.newInstance(new Object[] { url });
                    putParameter.invoke(browser, new Object[] { keyDirectObject, aeDesc });
                    sendNoReply.invoke(browser, new Object[] { });
                } catch (InvocationTargetException ite) {
                    throw new IOException("InvocationTargetException while creating AEDesc: " + ite.getMessage());
                } catch (IllegalAccessException iae) {
                    throw new IOException("IllegalAccessException while building AppleEvent: " + iae.getMessage());
                } catch (InstantiationException ie) {
                    throw new IOException("InstantiationException while creating AEDesc: " + ie.getMessage());
                } finally {
                    aeDesc = null;    // Encourage it to get disposed if it was created
                    browser = null;    // Ditto
                }
                break;
            case MRJ_2_1:
                Runtime.getRuntime().exec(new String[] { (String) browser, url } );
                break;
            case WINDOWS_NT:
            case WINDOWS_9x:
                Runtime.getRuntime().exec(new String[] { (String) browser, FIRST_WINDOWS_PARAMETER,
                                                                    SECOND_WINDOWS_PARAMETER, url });
                break;
            case OTHER:
                // Assume that we're on Unix and that Netscape is installed

                // First, attempt to open the URL in a currently running session of Netscape
                Process process = Runtime.getRuntime().exec((String) browser +
                                                            NETSCAPE_OPEN_PARAMETER_START +    url +
                                                            NETSCAPE_OPEN_PARAMETER_END);
                try {
                    int exitCode = process.waitFor();
                    if (exitCode != 0) {    // if Netscape was not open
                        Runtime.getRuntime().exec(new String[] { (String) browser, url });
                    }
                } catch (InterruptedException ie) {
                    throw new IOException("InterruptedException while launching browser: " + ie.getMessage());
                }
                break;
            default:
                // This should never occur, but if it does, we'll try the simplest thing possible
                Runtime.getRuntime().exec(new String[] { (String) browser, url });
                break;
        }
    }
}


Du kan så åbne en side med:
try{
  BrowserLauncher.openURL(textfieldSite.getText());
  //BrowserLauncher.openURL("http://www.exp.dk");
  }
catch(Exception e){System.out.println(e);}

Ok, jeg har delvist selv løst det med følgende kode:

try {     
                String[] cmd = new String[3];

                cmd[0] = "cmd.exe" ;
                cmd[1] = "/C" ;
                cmd[2] = "C:\\Program Files\\Internet Explorer\\IEXPLORE.exe";
                Runtime.getRuntime().exec(cmd);
            }
            catch (IOException ex) {
            }

hvordan får jeg den så til at åbne en bestemt URL?

/Niles

Den bruger default browseren på den pågældende computer.

Håber det kan bruges, mvh
Torben

niels>

Du kan angive URL efter IEXPLORE.EXE

Men overvej torbens forslag, fordi folk kan bruge andet en IE eller de kan bare
bruge en dansk windows så den ligger et andet sted !

... Det er nok at skyde gråspurve med kanoner.. fine klasser, der tager højde for lidt af hvert, men i min applikation ved jeg godt, at IEXPLORER ligger hvor den gør, og skal bare lige kaste en eller anden URL-parameter efter min browser...

leder pt. efter det i dine klasser.. :-)

/Nilez

String[] cmd = new String[4];
                cmd[0] = "cmd.exe" ;
                cmd[1] = "/C" ;
                cmd[2] = "C:\\Program Files\\Internet Explorer\\IEXPLORE.exe";
                cmd[3] = url;

ok, jeg kigger på Torbens forslag, som ser fint ud.. Indtil videre skal applikationen kun køre på en maskine, men det er jo ikke dumt at fremtidssikre sit program lidt..

Tak for hjælpen, begge to! Go' info!

poster lige koden, hvis andre skulle ha' brug for samme:

try {     
                String[] cmd = new String[4];

                cmd[0] = "cmd.exe" ;
                cmd[1] = "/C" ;
                cmd[2] = "C:\\Program Files\\Internet Explorer\\IEXPLORE.exe";
                cmd[3] = "http:\\\\zulu.dk\\bingo";
                Runtime.getRuntime().exec(cmd);
            }
            catch (IOException ex) {
            }



/Niles

På windows kan man bruge kommandoen start i cmd(NT)/command(95/98) til at åbne et dokument med dens tilknyttede program:

class Ex
{
    public static void main( String[] args )
        throws java.io.IOException
    {
        String cmd = "cmd /C start http:\\\\zulu.dk\\bingo";
        Runtime.getRuntime().exec(cmd);
    }
}

Wow, det er sku smart!

trp79--> Der sker ikke en skid, når jeg forsøger at acceptere dit svar, men jeg prøver da bare igen i morgen

Sjovt, trp79's svar ser ellers Accepteret ud for mig ;-)

Jo tak nielyng jeg har fået points. Ja den klasse er meget smart, så stor ros til hvem end der så har lavet den. Jeg fik den selv da jeg oprettede et spørgsmål lignende dit.

Mvh
Torben