如何在Java中创建类似于jar -uf的函数？

Question

Using the standard Java API (ie the user doesn't need the JDK to run it), how do you make a function similar to jar -uf in Java? I have an idea that it will use the Zip library, unzip the .jar file, change the contents, and then rezip it, but I'm a newbie at Java, so I cannot really make it. Could you give an example or a function?

Thanks!

Edit: I think I found the answer here: How to use JarOutputStream to create a JAR file? I'll see if it works.

Answer 1

Take a look at JarInputStream , JarOutputStream , ZipInputStream , and ZipOutputStream . They are a part of the JDK, so external libraries are not required. Pay attention that unlike other streams these require you to care about current entry. You can find a lot of examples of how to use the java zip API.