访问JAR文件中的资源 [英] Accessing resources within a JAR file

问题描述

我正在尝试访问嵌入在JAR文件中的资源.需要访问文件的类是:

I'm trying to access resources that I have embedded in a JAR file. The class that needs to access a file is:

/worldEntities/factories/RoomFactory.class

并尝试访问:

/map-data/roomDescriptions.xml

为此，我将以下代码添加到RoomFactory.class:

To do this, I have added the following code to RoomFactory.class:

Document doc = docBuilder.parse(this.getClass().getResourceAsStream("/map-data" + File.separator + "roomDescriptions.xml"));

当我在NetBeans中执行项目时，它运行正常，没有错误.但是，当我尝试从命令行运行代码时，请输入

When I execute the project in NetBeans, it works fine with no errors. However, when I attempt to run the code from the command line, by entering

java -jar Program.jar

我得到一个java.lang.IllegalArgumentException:InputStream不能为null，它指向我上面描述的代码.

I get a java.lang.IllegalArgumentException: InputStream cannot be null, and it points the code that I describe above.

在此先感谢您的帮助，

托马斯

推荐答案

1. 具有"-" char的名称不是有效的Java软件包名称.因此"map-data"不是有效的程序包名称.

1. Name with "-" char are not valid Java package name. So "map-data" is not a valid package name.

然后，File.separator在不同平台上可能会有所不同.在代码中使用"/"，以确保使用有效的软件包分隔符.

Then File.separator could be different on different platforms. Use "/" in your code to be sure to use the valid package separator.

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