Updating an existing .jar file

I have downloaded the .class files of servlet2.3 . I have successfully archived the .class files which is under javax.servlet.* package.However, i am unable to understand how do i add the .class files which are under javax.servlet.http. package to the same archive.
Where do i place the already created .jar file. Please give me the exact syntax.
I placed my .jar file under http folder and ran the command jar cvfu Servlet.jar *.class but it did not work.
Thanks!
Jayashree

I assume that there is :
- a jar file that you wanna update with a newer class file
- a class file that you wanna use to update the jar file
you must copy the yourjarfile.jar in your home directory :
cp anydirectory/yourjarfile.jar /home/yourdirectory/
then you must uncompress it by :
cd /home/yourdirectory
jar -xf yourjarfile.jar
then you must copy the newer class file that you have compiled in the good subdirectory that has been created while uncompressing yourjafile.jar
cp directorywhereyouclassfileis/yourclassfile.class subdirectorycreatedwhileuncompressing/
then you can update you jar file by :
jar -uf directorycreatedwhileuncompressing/yourclassfile.class yourjarfile.jar
You can then verify that is has just been updated by :
jar -tvf yourjarfile.jar -->verify the date/time to check
hope it helps...
bye

Similar Messages

How to set new value for the existing jar file

Help:
I am wondering if there is a simple to update value for Manifest-Version in a existing jar file?
Thanks!

The jar command's -u option is about as easy as I know.
See the jar command documentation for the details.

How do i update an existing XML File?

Hello, I have the following xml file gps.xml:<?xml version="1.0"?>
<!DOCTYPE gps SYSTEM "gps.dtd">
<gps>
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Hi, I already have this following code. I would just like to add a method to it to update the existing XML file with different lat/lon coordinates. Could you please help me out with it? thanks
import java.io.*;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.*;
public class Gps implements java.io.Serializable {
    private double latitude_;
    private double longitude_;
    public Gps(Document doc) {
        setup(doc.getDocumentElement());
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        setup(doc.getDocumentElement());
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        if (parent instanceof Document) {
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        makeElement(doc);
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     // something???
    public final void updateXmlFile(double latitude, double longitude) {
        this.latitude_ = latitude;
        this.longitude_ = longitude;
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Modifying existing jar file, how?

Hi there,
I have a problem trying to modify an existing jar file. When I want to create a jar file, I use something like:
REM build the application on windows, assuming the java/bin
REM directory is in the path environment variable
REM application is just the directory I am using
SET cp = c:\application\TestApp
javac -classpath %cp% TestApp.java
REM ****************************************
REM do packaging and adding manifest
REM ****************************************
jar cvfm App.jar manifest.mf TestApp*.class
REM ****************************************
REM run the jar file
REM ****************************************
javaw -jar App.jar
But now, I have an existing jar file (swingall.jar) and I want to modify a class within that file. So, I modified the .java file, and compiled it to get my new class file.
And the question is, how do I modify the existing file, so that I keep everything the same, except the modified class?
Thanks
Fernando

I have just found out that I can't use "u". It seemsthat's only
possible with older versions of jar.Huh? I'm using the 1.4.2-b28 jdk, it's still there,
and I don't see how it could ever possibly be
removed.
Type:
jar
with no arguments to see all the options to jar.I already did, to double check it, and this is what I got:
C:\Documents and Settings\Fernando Sanz>jar
Usage: jar {ctx}[vfm0M] [jar-file] [manifest-file] files ...
Options:
-c create new archive
-t list table of contents for archive
-x extract named (or all) files from archive
-v generate verbose output on standard error
-f specify archive file name
-m include manifest information from specified manifest file
-0 store only; use no ZIP compression
-M Do not create a manifest file for the entries
If any file is a directory then it is processed recursively.
The manifest file name and the archive file name needs to be specified
in the same order the 'm' and 'f' flags are specified.
Example: to archive two class files into an archive called classes.jar:
jar cvf classes.jar Foo.class Bar.class
Note: use the '0' option to create a jar file that can be put in your CLASSPATH
Thanks for trying with jdk 1.4, I don't have it installed in my computer right now, so I'll try tomorrow with another computer at Uni.
Thanks!

Updating an existing xml file in java

Hi,
i need to update an existing xml file with new nodes. But i don.t know how to do that. i can read and write a new xml file . But updaton seems too difficult for me.
my xml structure is like this
<main_node>
<node1>
<name> name1</name1>
<id>ID</id>
</node1>
<node2>
<name2> name2</name2.
<id>ID</id>
</node2.
</main_node>
i want to insert node3 in this structure.
please help, it,s urgent;
Thanks in Advance

here is the code if ur using dom..
Node node4 = doc.createTextNode(name3);
Element element4=doc.createElement("name3");
element4.append(node4);
c one thing that u should take care here is that u have created and is reflected on ly in ur document object and not in xml..for that u have to write some more code like this
// This method writes a DOM document to a file
public static void writeXmlFile(Document doc, String filename) {
try {
// Prepare the DOM document for writing
Source source = new DOMSource(doc);
// Prepare the output file
File file = new File(filename);
Result result = new StreamResult(file);
// Write the DOM document to the file
Transformer xformer = TransformerFactory.newInstance().newTransformer();
xformer.transform(source, result);
} catch (TransformerConfigurationException e) {
} catch (TransformerException e) {
look this code..that will help u
regards
[email protected]

How to append existed jar file?

do existed jar file be append again?
example:
a.jar // existed jar file
xyz // forlder that want append to a.jar

you mean you want to add a directory full of class files to the existing .jar file?
check the .jar file usage options.
c:\> jar -helpDiablo

Updating an EJB jar file on WL7.0

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accessing the old ejb.
From my understanding, if the server is running in development mode I should be
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overwriting old jar file) and be able to access the udated ejb.

Hello Ron,
An alternative would be to modify a REDEPLOY file if your application is deployed
in exploded directory format. However, updating the EJB JAR should also do the
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file after copying over the new JAR file. Let us know if any errors appear.
Best regards,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
"Ron Turner" <[email protected]> wrote:
>
Hi
Iam attempting to update an EBJ jar file without taking down my WL7.0
server.
When I copy the jar file to the applications directory, I see the server
accepting
the update but when I run my client the update is not visible! Iseem
to be still
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From my understanding, if the server is running in development mode I
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bye.
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org.w3c.dom.Document d = parseXmlFile("D:/www/Detailcache/detail.xml", false);
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He folks!
Here is what i want to:
1.
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2.
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greetings
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Updating a running JAR file without using JDK

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I had similar requirement, except that, i used a war file.
Had a client.war file in JBoss deploy directory, and i needed to update client.jnlp file present in it.
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How can I update an existing .dot file (created long ago in Word)?

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When we update an existing pdf file occurence of " /Count" increases.

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Adding JAR file to project

Hi All
How can i add jar to my project environment.
Actually what i did was.
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and put the jar file into this folder and wrote a test class which is importing some classes from the jar file.
how to use jar ? Please someone help me.
Thanks in advance
Shan

`man jar`
jar(1) jar(1)
NAME
jar - Java archive tool
SYNOPSIS
jar [ -C ] [ c ] [ f ] [ i ] [ M ] [ m ] [ O ] [ t ] [ u ]
[ v ]
[ x file ] [ manifest-file ] destination input-file
[ input-files ]
DESCRIPTION
The jar tool is a Java application that combines multiple
files into a single JAR archive file. It is also a gen-
eral-purpose archiving and compression tool, based on ZIP
and the ZLIB compression format. However, jar was
designed mainly to facilitate the packaging of Java
applets or applications into a single archive. When the
components of an applet or application (.class files,
images and sounds) are combined into a single archive,
they can be downloaded by a Java agent (like a browser) in
a single HTTP transaction, rather than require a new con-
nection for each piece. This dramatically improves down-
load time. The jar tool also compresses files, which fur-
ther improves download time. In addition, it allows indi-
vidual entries in a file to be signed by the applet author
so that their origins can be authenticated. The syntax
for the jar tool is almost identical to the syntax for the
tar(1) command. A jar archive can be used as a class path
entry, whether or not it is compressed.
The three types of input files for the jar tool are:
o Manifest file (optional)
o Destination jar file
o Files to be archived
Typical usage is:
example% jar cf myjarfile *.class
In this example, all the class files in the current direc-
tory are placed in the file named myjarfile. A manifest
file is automatically generated by the jar tool and is
always the first entry in the jar file. By default, it is
named META-INF/MANIFEST.MF. The manifest file is the
place where any meta-information about the archive is
stored. Refer to the Manifest Format in the SEE ALSO sec-
tion for details about how meta-information is stored in
the manifest file.
To use a pre-existing manifest file to create a new jar
archive, specify the old manifest file with the m option:
example% jar cmf myManifestFile myJarFile *.class
When you specify cfm instead of cmf (that is, you invert
the order of the m and f options), you need to specify the
name of the jar archive first, followed by the name of the
manifest file:
example% jar cfm myJarFile myManifestFile *.class
The manifest uses RFC822 ASCII format, so it is easy to
view and process manifest-file contents.
OPTIONS
The following options are supported:
-C Changes directories during execution of the jar com-
mand. For example:
example% jar uf foo.jar -C classes *
c Creates a new or empty archive on the standard out-
put.
f The second argument specifies a jar file to process.
In the case of creation, this refers to the name of
the jar file to be created (instead of on stdout).
For table or xtract, the second argument identifies
the jar file to be listed or extracted.
i Generates index information for the specified jar
file and its dependent jar files. For example,
example% jar i foo.jar
would generate an INDEX.LIST file in foo.jar which con-
tains location information for each package in foo.jar and
all the jar files specified in foo.jar's Class-Path
attribute.
M Does not create a manifest file for the entries.
m Includes manifest information from specified pre-
existing manifest file. Example use:
example% jar cmf myManifestFile myJarFile *.class
You can add special-purpose name-value attribute
headers to the manifest file that are not contained
in the default manifest. Examples of such headers
are those for vendor information, version informa-
tion, package sealing, and headers to make JAR-bun-
dled applications executable. See the JAR Files
trail in the Java Tutorial and the JRE Notes for
Developers web page for examples of using the m
option.
O Stores only, without using ZIP compression.
t Lists the table of contents from standard output.
u Updates an existing JAR file by adding files or
changing the manifest. For example:
example% jar uf foo.jar foo.class
adds the file foo.class to the existing JAR file
foo.jar, and
example% jar umf foo.jar
updates foo.jar's manifest with the information in
manifest.
v Generates verbose output on stderr.
x file
Extracts all files, or just the named files, from
standard input. If file is omitted, then all files
are extracted; otherwise, only the specified file or
files are extracted.
If any of the files is a directory, then that direc-
tory is processed recursively.
EXAMPLES
To add all of the files in a particular directory to an
archive:
example% ls
0.au 3.au 6.au 9.au at_work.gif
1.au 4.au 7.au Animator.class monkey.jpg
e.au 5.au 8.au Wave.class spacemusic.au
example% jar cvf bundle.jar *
adding: 0.au
adding: 1.au
adding: 2.au
adding: 3.au
adding: 4.au
adding: 5.au
adding: 6.au
adding: 7.au
adding: 8.au
adding: 9.au
adding: Animator.class
adding: Wave.class
adding: at_work.gif
adding: monkey.jpg
adding: spacemusic.au
example%
If you already have subdirectories for images, audio
files, and classes that already exist in an HTML direc-
tory, use jar to archive each directory to a single jar
file:
example% ls
audio classes images
example% jar cvf bundle.jar audio classes images
adding: audio/1.au
adding: audio/2.au
adding: audio/3.au
adding: audio/spacemusic.au
adding: classes/Animator.class
adding: classes/Wave.class
adding: images/monkey.jpg
adding: images/at_work.gif
example% ls -l
total 142
drwxr-xr-x 2 brown green 512 Aug 1 22:33 audio
-rw-r--r-- 1 brown green 68677 Aug 1 22:36 bundle.jar
drwxr-xr-x 2 brown green 512 Aug 1 22:26 classes
drwxr-xr-x 2 brown green 512 Aug 1 22:25 images
example%
To see the entry names in the jar file using the jar tool
and the t option:
example% ls
audio bundle.jar classes images
example% jar tf bundle.jar
META-INF/MANIFEST.MF
audio/1.au
audio/2.au
audio/3.au
audio/spacemusic.au
classes/Animator.class
classes/Wave.class
images/monkey.jpg
images/at_work.gif
example%
To display more information about the files in the
archive, such as their size and last modified date, use
the v option:
example% jar tvf bundle.jar
145 Thu Aug 01 22:27:00 PDT 1996 META-INF/MANIFEST.MF
946 Thu Aug 01 22:24:22 PDT 1996 audio/1.au
1039 Thu Aug 01 22:24:22 PDT 1996 audio/2.au
993 Thu Aug 01 22:24:22 PDT 1996 audio/3.au
48072 Thu Aug 01 22:24:23 PDT 1996 audio/spacemusic.au
16711 Thu Aug 01 22:25:50 PDT 1996 classes/Animator.class
3368 Thu Aug 01 22:26:02 PDT 1996 classes/Wave.class
12809 Thu Aug 01 22:24:48 PDT 1996 images/monkey.jpg
527 Thu Aug 01 22:25:20 PDT 1996 images/at_work.gif
example%
If you bundled a stock trade application (applet) into the
following jar files,
main.jar buy.jar sell.jar other.jar
and you specified the Class-Path attribute in main.jar's
manifest as
Class-Path: buy.jar sell.jar other.jar
then you can use the i option to speed up your applica-
tion's class loading time:
example$ jar i main.jar
An INDEX.LIST file is inserted in the META-INF directory
which will enable the application class loader to download
the right jar files when it is searching for classes or
resources.
SEE ALSO
keytool(1)
JAR Files @
http://java.sun.com/docs/books/tutorial/jar/
JRE Notes @
http://java.sun.com/j2se/1.3/runtime.html#exam-
ple
JAR Guide @
http://java.sun.com/j2se/1.3/docs/guide/jar/index.html
For information on related topics, use the search link @
http://java.sun.com/
13 June 2000 jar(1)

Error while updating a jar file

I am trying to update a jar file using teh following command
jar -uf project.jar fileMy.prop
however while doing that i get the following error
java.io.IOException: Error in writing existing jar file
at sun.tools.jar.Main.run(Main.java:179)
at sun.tools.jar.Main.main(Main.java:904)

Perhaps some process (your java program perhaps) is still running that has the file open still? You'll need to shut down the process(es) that have it open. Or you don't have proper rights to the directory/file. Not a java issue.

Error in updating jar file in windows

Hi...
I am updating a jar file using Runtime.exec() by passing a batch file in it.
While updating the jar file I am getting error like this:
java.io.IOException: Error in writing existing jar file
at sun.tools.jar.Main.run(Main.java:198)
at sun.tools.jar.Main.main(Main.java:1022)
The batch file (upgradejar.bat) is like this:
echo IQuinox NextGen Upgrade Management
cd shared/upgrade/upgrade/IQfullversion/classes
jar uf ../../../../../../jars/ng.jar ./qlc/postmaster/PMStartup.class ./qlc/postmaster/wpm/admin/scheduler/others/OthersScheduleServlet.class
The java code is like this:
Process p=Runtime.getRuntime.exec( "cmd /C start "+upgradejar.bat);
if (p.waitFor() != 0) {
System.err.println("exit value = " +p.exitValue());
Thanks.

I am using the jar file in my program. the jar file name is " _ng.jar_ " which is mentioned in the batch file.
The batch file is here :
echo IQuinox NextGen Upgrade Management
cd shared/upgrade/upgrade/IQfullversion/classes
jar uf ../../../../../../jars/ng.jar ./qlc/postmaster/PMStartup.class ./qlc/postmaster/wpm/admin/scheduler/others/OthersScheduleServlet.class

Updating an existing .jar file

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