NetBeans 中的 Java 相对路径
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Java relative path in NetBeans
提问by Keshan
I am developing a NetBeans module where I have a Java package called testand another package called test.templates. I want to read a text file which is in the test.templatespackage from a Java file in the test package. I tried in several ways, but it gives a FileNotFoundExceptionexception:
我正在开发一个 NetBeans 模块，其中有一个名为 Java 的包test和另一个名为test.templates. 我想test.templates从测试包中的 Java 文件中读取包中的文本文件。我尝试了几种方法，但它给出了一个FileNotFoundException例外：
BufferedReader br = new BufferedReader(new FileReader("templates/test.txt"));
BufferedReader br = new BufferedReader(new FileReader("/test/templates/test.txt"));
BufferedReader br = new BufferedReader(new FileReader("src/test/templates/test.txt"));
But none of these worked.. I want to use the relative path, not the absolute path. What should I do?
但这些都不起作用..我想使用相对路径，而不是绝对路径。我该怎么办？
回答by Ray Toal
You will want to use getResourceor getResourceAsStream.
您将要使用getResource或getResourceAsStream。
Example on java2s.com:
java2s.com 上的示例：
http://www.java2s.com/Code/Java/Development-Class/Loadresourcefilerelativetotheclasslocation.htm
http://www.java2s.com/Code/Java/Development-Class/Loadresourcefilerelativetotheclasslocation.htm
回答by V? H?ng K?
You should note somethings about relative path (Netbeans):
您应该注意有关相对路径（Netbeans）的一些内容：
+ File: Default is project folder, means outside of srcfolder.
If you save to test.txt, it will generate: project/test.txt.
If you save to data/test.txt, ... project/data/test.txt
So if you want to load file, you just do it conversely. Like this, you should put your files in project/data/filename.txt. Then when code, you get path: data/filename.txt.
+ 文件：默认为项目文件夹，表示src文件夹外。
如果保存到test.txt，它将生成：project/test.txt。
如果你保存到data/test.txt, ...project/data/test.txt
所以如果你想加载文件，你只需反过来做。像这样，你应该把你的文件放在 project/data/filename.txt 中。然后在编写代码时，您会得到 path: data/filename.txt。
+ ImageIcon: I will share later if can.
+ Image(SplashScreen): I will share later.
+ ImageIcon：如果可以，我稍后会分享。
+ 图片（SplashScreen）：我稍后会分享。
回答by Megatron
getResource()returns a URL, so to extract the filename, you can try calling getFile().
getResource()返回一个 URL，因此要提取文件名，您可以尝试调用getFile().
The filepath you pass to getResource will be based on your netbeans package. Use a leading slash to denote the root of the classpath.
您传递给 getResource 的文件路径将基于您的 netbeans 包。使用前导斜杠表示类路径的根。
Example:
例子：
getResource(/db_files/table.csv).getFile()
回答by Joyal Augustine
try
{
BufferedReader br = new BufferedReader(new FileReader(getClass().getResource("/test/templates/test.txt").toString().substring(6)));
}
catch(Exception ee)
{
JOptionPane.showMessageDialog(this, ee);
}
