Java：如何在测试中打开 src/main/resources 中的文本文件？
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Java: How do I open a text file in test that is in src/main/resources?
提问by daydreamer
my project struture looks like
我的项目结构看起来像
project/
src/main/
java/ ...
resources/
definitions.txt
test/
CurrentTest.java
resources/ ...
In my test I need to open the definitions.txt
在我的测试中，我需要打开 definitions.txt
I do
我做
@Test
public void testReadDesiredDefinitions() throws PersistenceException, IOException {
final Properties definitions = new Properties();
definitions.load(new ResourceService("/").getStream("desiredDefinitions"));
System.out.println(definitions);
}
When I run this, I get
当我运行这个时，我得到
java.lang.NullPointerException
at java.util.Properties$LineReader.readLine(Properties.java:418)
at java.util.Properties.load0(Properties.java:337)
at java.util.Properties.load(Properties.java:325)
How can I read this text file?
我怎样才能阅读这个文本文件？
Thanks
谢谢
回答by Bohemian
The "current directory" of unit tests is usually the project directory, so use this:
单元测试的“当前目录”通常是项目目录，所以使用这个：
File file = new File("src/main/resources/definitions.txt");
and load the properties from the file:
并从文件加载属性：
definitions.load(new FileInputStream(file));
If this doesn't work, or you want to check what the current directory is, just print out the path and it will be obvious what the current directory is:
如果这不起作用，或者您想检查当前目录是什么，只需打印出路径，就会很明显当前目录是什么：
System.out.println(file.getAbsolutePath());
回答by FThompson
You can make use of Class#getResourceAsStreamto easily create a stream to a resource file.
您可以使用Class#getResourceAsStream轻松创建到资源文件的流。
definitions.load(getClass().getResourceAsStream("/main/java/resources/definitions.txt"));
The location parameter should be the relative file path with regards to your project base (my guess was main).
location 参数应该是与您的项目库相关的相对文件路径（我的猜测是主要的）。
回答by tux23
File file = new File("../src/main/resources/definitions.txt");
File file = new File("../src/main/resources/definitions.txt");
回答by Alex
If your resourcesdirectory is a source folder, you can use /resources/definitions.txtas a correct path.
如果您的resources目录是源文件夹，则可以/resources/definitions.txt用作正确的路径。
I don't know about ResourceServicebut this should work:
我不知道，ResourceService但这应该有效：
final Properties definitions = new Properties();
definitions.load(getClass().getResourceAsStream("/resources/definitions.txt"))
