[英]Create .jar files in java without using IDE
I am trying to create .jar files in java which can be used by including it in other projects. 我正在尝试在Java中创建.jar文件,可以通过将其包含在其他项目中来使用该文件。 It doesn't contain any main but only classes and methods.
它不包含任何主要类,而仅包含类和方法。 I am using th following command to create .jar file from command line
我正在使用以下命令从命令行创建.jar文件
jar cf firstjar.jar *
I am including the jar file in my project but still the class is not available in the project. 我在项目中包含jar文件,但该类在项目中仍然不可用。 What's the problem in this.
这有什么问题。
My guess is that you've got a problem with the directory structure. 我的猜测是您的目录结构有问题。
Suppose you have a class like this: 假设您有一个像这样的课程:
package org.foo;
public class Bar {}
There should be Bar.class
flie in a directory org/foo
. org/foo
目录中应该有Bar.class
。 That structure has to be in the jar file as well - so you should go to the directory containing org
and run: 该结构也必须在jar文件中-因此,您应该转到包含
org
的目录并运行:
jar cf firstjar.jar org
(Or whatever your top-level package name is.) (或者您的顶级软件包名称是什么。)
If you just include the classfiles from the foo
directory then Java's expectations of where to find things will be invalid. 如果仅包含
foo
目录中的类文件,那么Java对在哪里找到对象的期望将是无效的。
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