如何在JUnit测试中从src / main / resources中读取文件？

Question

I have a junit testcase and a file that I want to load during that test. The file is placed under src/main/resources , whereas the packages are named same as the java testfile:

src/test/java/my/path/to/FileTest.java
src/test/resource/my/path/to/test.txt

Usage:

public class FileTest {
    @Test
    public void testRead() {
        String content = IOUtils.toString(this.getClass().getResourceAsStream("test.txt"), Charset.defaultCharset());
        System.out.println(content);
    }
}

Exception when running the testcase in IDE:

java.lang.NullPointerException
    at java.io.Reader.<init>(Reader.java:78)
    at java.io.InputStreamReader.<init>(InputStreamReader.java:113)
    at org.apache.commons.io.IOUtils.copy(IOUtils.java:2272)
    at org.apache.commons.io.IOUtils.toString(IOUtils.java:1041)

What might be wrong here?

Answer 1

我结束了将testfiles直接放入/src/main/resources而没有子包，并使用。

PropertiesLoaderUtils.loadProperties(new ClassPathResource(filename));