this.getClass（）。getClassLoader（）。getResource（“...”）和NullPointerException(this.getClass().getClassLoader().getResource(“…”) and NullPointerException)

 我在eclipse helios中创建了一个包含单个子模块的最小maven项目。 
 
 在src / test / resources文件夹中，我放了一个文件“install.xml”。 在文件夹src / test / java中，我创建了一个包含单个类的单个包： 
 
  @Test
  public void doit() throws Exception {
    URL url = this.getClass().getClassLoader().getResource("install.xml");
    System.out.println(url.getPath());

  }
 
 但是当我运行代码作为junit 4单元测试时，我只是得到一个NullPointerException。 以前，这已经有一百万次了。 有任何想法吗？ 
 
 我遵循了本指南： 
 
 http://www.fuyun.org/2009/11/how-to-read-input-files-in-maven-junit/ 
 
 但仍然得到相同的错误。 

I have created a minimal maven project with a single child module in eclipse helios.
 
In the src/test/resources folder I have put a single file "install.xml". In the folder src/test/java I have created a single package with a single class that does:
 
  @Test
  public void doit() throws Exception {
    URL url = this.getClass().getClassLoader().getResource("install.xml");
    System.out.println(url.getPath());

  }
 
but when I run the code as a junit 4 unit test I just get a NullPointerException. This has worked fine a million of times before. Any ideas?
 
I have followed this guide:
 
http://www.fuyun.org/2009/11/how-to-read-input-files-in-maven-junit/
 
but still get the same error.

原文：https://stackoverflow.com/questions/3803326