blocks|key|1272748|text|您可以使用jar的u选项|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1272749|来自Java教程：|1272750|jar+uf+jar-file+input-file(s)|code-block|syntax|javascript|1272751|“存档中已存在的任何文件与要添加的文件具有相同路径名的文件都将被覆盖。”|1272752|参见Updating+a+JAR+File。|1272753|这比把整个罐子重新做一遍要好得多。从你的程序中调用它听起来也是可能的。试试Running+Command+Line+in+Java|1272754|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/tutorial/deployment/jar/update.html|1|https://stackoverflow.com/questions/8496494/running-command-line-in-java^0|5|3|9|1|0|0|0|0|2|J|0|0|11|S|1|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|17|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|18|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|19|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|1A|8|@]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|Q|3|R|5|6|7|1E|8|@]|D|@$9|1F|A|1G|1|1H]]|E|$]]|$1|S|3|-4|5|6|7|1I|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]|10|$5|V|W|X|E|$Y|11]]]]

You can use the <code>u</code> option for <code>jar</code>

From the Java Tutorials:

<pre><code>jar uf jar-file input-file(s)
</code></pre>

"Any files already in the archive having the same pathname as a file being added will be overwritten."

See <a href="http://docs.oracle.com/javase/tutorial/deployment/jar/update.html" rel="noreferrer">Updating a JAR File</a>.

Much better than making the whole jar all over again. Invoking this from within your program sounds possible too. Try <a href="https://stackoverflow.com/questions/8496494/running-command-line-in-java">Running Command Line in Java</a>

blocks|key|1487444|text|您可以使用Vim：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1487445|vim+my.jar|offset|length|style|CODE|1487446|如果您的环境中有unzip，Vim可以编辑压缩的文本文件。|1487447|entityMap^0|0|0|A|0|8|5|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@$D|Q|E|R|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|K|$]]

You can use Vim:

<code>vim my.jar</code>

Vim is able to edit compressed text files, given you have <code>unzip</code> in your environment.

blocks|key|1487189|text|Java+jar文件与zip文件的格式相同-因此，如果您有一个zip文件实用程序，可以让您修改归档文件，那么您就大功告成了。第二个问题是，如果您想重新编译一个类或其他东西，可能只需要重新构建jar；但是文本文件或其他文件(例如xml)应该可以很容易地进行修改。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1487190|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Java jar files are the same format as zip files - so if you have a zip file utility that would let you modify an archive, you have your foot in the door. Second problem is, if you want to recompile a class or something, you probably will just have to re-build the jar; but a text file or something (xml, for instance) should be easily enough modified.

blocks|key|1487309|text|正如许多人所说的那样，如果不重新扫描JAR，就不能更改JAR中的文件。使用Launch4J更糟糕，一旦更改了JAR文件，就必须重新构建可执行文件。所以不要走这条路。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1487310|将配置文件放在JAR中通常不是一个好主意。这是我的建议。在一些预先确定的位置(如主目录、\Program+Files\等)中搜索配置文件。如果找到配置文件，请使用它。否则，使用JAR中的那个作为回退。如果你这样做，你只需要把配置文件写在预定的位置，程序就会取走它。|1487311|这种方法的另一个好处是，如果升级软件，修改后的配置文件不会被覆盖。|1487312|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

As many have said, you can't change a file in a JAR without recanning the JAR. It's even worse with Launch4J, you have to rebuild the EXE once you change the JAR. So don't go this route.

It's generally bad idea to put configuration files in the JAR. Here is my suggestion. Search for your configuration file in some pre-determined locations (like home directory, \Program Files\ etc). If you find a configuration file, use it. Otherwise, use the one in the JAR as fallback. If you do this, you just need to write the configuration file in the pre-determined location and the program will pick it up.

Another benefit of this approach is that the modified configuration file doesn't get overwritten if you upgrade your software.

blocks|key|1487257|text|这可能比您在短期内要处理的工作量更多，但我怀疑从长远来看，考虑使用Ant+(或Maven，甚至Bazel)而不是手动构建jar将非常有益。这样，您只需单击ant文件(如果您使用Eclipse)并重新构建jar即可。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1487258|或者，您可能根本不想在jar中包含这些配置文件-如果您希望定期替换这些文件，或者如果它被分发给多方，那么配置文件就不应该是jar的一部分。|1487259|entityMap|0|LINK|mutability|MUTABLE|url|http://ant.apache.org/|1|https://maven.apache.org/|2|http://bazel.io/^0|X|3|0|13|5|1|1B|5|2|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]|$A|V|B|W|1|X]|$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|12|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]|P|$5|I|J|K|C|$L|Q]]]]

This may be more work than you're looking to deal with in the short term, but I suspect in the long term it would be very beneficial for you to look into using <a href="http://ant.apache.org/" rel="nofollow noreferrer">Ant</a> (or <a href="https://maven.apache.org/" rel="nofollow noreferrer">Maven</a>, or even <a href="http://bazel.io/" rel="nofollow noreferrer">Bazel</a>) instead of building jar's manually. That way you can just click on the ant file (if you use Eclipse) and rebuild the jar.

Alternatively, you may want to actually not have these config files in the jar at all - if you're expecting to need to replace these files regularly, or if it's supposed to be distributed to multiple parties, the config file should not be part of the jar at all.

blocks|key|1487330|text|是的，您可以使用SQLite从jar文件中读取或写入数据库，这样您就不必提取它，然后重新压缩它，请关注我的帖子http://shoaibinamdar.in/blog/?p=313|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1487331|使用语法"jdbc:sqlite::resource:“，您将能够从jar文件中读取和写入数据库|1487332|entityMap|0|LINK|mutability|MUTABLE|url|http://shoaibinamdar.in/blog/?p=313^0|1J|Z|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Yes you can, using SQLite you can read from or write to a database from within the jar file, so that you won't have to extract and then re jar it, follow my post <a href="http://shoaibinamdar.in/blog/?p=313" rel="nofollow">http://shoaibinamdar.in/blog/?p=313</a>

using the syntax "jdbc:sqlite::resource:" you would be able to read and write to a database from within the jar file

blocks|key|1272714|text|查看TrueZip。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1272715|它通过一个虚拟文件系统API执行您想要的操作(编辑jar文件中的内联文件)。它还支持嵌套归档(jar中的jar)。|1272716|entityMap|0|LINK|mutability|MUTABLE|url|http://truezip.java.net/^0|2|7|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Check out <a href="http://truezip.java.net/" rel="nofollow">TrueZip</a>.

It does exactly what you want (to edit files inline inside a jar file), through a virtual file system API. It also supports nested archives (jar inside a jar) as well.

blocks|key|1487154|text|只要这个文件不是.class，即资源文件或清单文件，你就可以。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1487155|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

As long as this file isn't .class, i.e. resource file or manifest file - you can.

I would like to modify a file inside my jar. Is it possible to do this without extracting and re jarring, from within my application?

File i want to modify are configuration files, mostly xml based.

The reason i am interested in not un jarring is that the application is wrapped with launch4j if i unjar it i can't create the .exe file again.

Modifying a file inside a jar

文件系统

数据库

Eclipse

SQLite

Java

我想在我的jar中修改一个文件。在我的应用程序中，有没有可能做到这一点，而不需要提取和重新处理呢？我想修改的文件是配置文件，主要是基于xml的。我之所以对不解压jarring感兴趣，是因为应用程序是用launch4j包装的，如果我解压它，就不能再次创建.exe文件。

问修改jar中的文件
EN

回答 8

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问修改jar中的文件EN

回答 8

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问修改jar中的文件
EN