创建包含外部文件的Runnable Jar

本文介绍了创建包含外部文件的Runnable Jar的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想在java中构建一个可运行的jar。我需要在jar中包含一些文件，这样当我执行jar时，文件会自动从java类中读取。因此，我在项目中创建了一个文件夹，并从项目中引用了这些文件。我在一些教程后创建了jar文件，但我无法将这些外部文件包含在我的jar文件中。请告诉我有关使用外部文件创建可运行jar的信息。

I want to build a runnable jar in java. I need to include some of the files in the jar so that when I execute jar the files are automatically read from the java class. Hence I created a folder in the project and referred these files from the project. I created jar file following some tutorial but I could not able to include these external files in my jar file. Please let me about creating runnable jar with external files.

我的文件结构是

Test | | -------src | | | default package | | | | | test1.java | -------FileFOlder | | | | | abc.txt

我在 test1中访问 abc.txt .java 类。 我的代码是，

I am accessing abc.txt in test1.java class. My code is,

public class test1 { public static void main(String[] args) throws IOException { char [] read = new char[20]; String path = new File(".").getCanonicalPath(); path = path+"\\Newfolder\\abc.txt"; System.out.println(path); File nF = new File(path); FileReader fR = new FileReader(nF); fR.read(read); for(char c : read){ System.out.print(c); } fR.close(); System.out.println(" Hi..This is test program "); } }

当我使用eclipse创建可执行jar时导出选项，我无法在jar中看到FileFolder目录。请给我一些有关此事的信息。

When I create executable jar using eclipse export option, I am unable to see FileFolder directory inside the jar. Please give me some information regarding this.

推荐答案

以下是您应该做的事情：

Here's what you should do instead:

放置该文件在你的jar文件中 in 。使用 class.getResourceAsStream（）来读取它而不是文件和 FileReader 。以下是如何执行此操作的说明：如何真的从Java中的classpath读取文本文件

Put that file back in your jar file. Use class.getResourceAsStream() to read it instead of File and FileReader. Here is an explanation of how to do that: How to really read text file from classpath in Java