如何从资源文件夹加载文件? [英] How do I load a file from resource folder?
本文介绍了如何从资源文件夹加载文件?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
我的项目具有以下结构:
My project has the following structure:
/src/main/java/
/src/main/resources/
/src/test/java/
/src/test/resources/
我在 /src/test/resources/test.csv
中有一个文件,我想从 /src/test/java/MyTest.java 中的单元测试加载文件
I have a file in /src/test/resources/test.csv
and I want to load the file from a unit test in /src/test/java/MyTest.java
我有这个无效的代码.它抱怨没有这样的文件或目录".
I have this code which didn't work. It complains "No such file or directory".
BufferedReader br = new BufferedReader (new FileReader(test.csv))
我也试过这个
InputStream is = (InputStream) MyTest.class.getResourcesAsStream(test.csv))
这也不起作用.它返回 null
.我正在使用 Maven 来构建我的项目.
This also doesn't work. It returns null
. I am using Maven to build my project.
推荐答案
尝试下一个:
ClassLoader classloader = Thread.currentThread().getContextClassLoader();
InputStream is = classloader.getResourceAsStream("test.csv");
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如果以上都不行,各种项目都添加了以下类:ClassLoaderUtil
1(代码这里).2
以下是如何使用该类的一些示例:
Here are some examples of how that class is used:
srcmainjavacomcompany estYourCallingClass.java
srcmainjavacomopensymphonyxwork2utilClassLoaderUtil.java
srcmain
esources est.csv
// java.net.URL
URL url = ClassLoaderUtil.getResource("test.csv", YourCallingClass.class);
Path path = Paths.get(url.toURI());
List<String> lines = Files.readAllLines(path, StandardCharsets.UTF_8);
// java.io.InputStream
InputStream inputStream = ClassLoaderUtil.getResourceAsStream("test.csv", YourCallingClass.class);
InputStreamReader streamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
BufferedReader reader = new BufferedReader(streamReader);
for (String line; (line = reader.readLine()) != null;) {
// Process line
}
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