java 如何从Java中的资源目录加载文件
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How to load file from resources directory in Java
提问by AP01
I am trying to load a properties file directly from the resources directory of my Java project and am getting a null pointer exception. Can someone pl explain how to do it?
我试图直接从我的 Java 项目的资源目录加载一个属性文件，但出现空指针异常。有人可以解释一下怎么做吗？
Code-
代码-
String resourceName = "config-values.properties";
Properties props = new Properties();
try(InputStream resourceStream = getClass().getClassLoader().getResourceAsStream(resourceName)) {
props.load(resourceStream);
}
My folder structure is - /src/packageName and /src/resources/
我的文件夹结构是 - /src/packageName 和 /src/resources/
回答by
Following code expects that the resource, you are trying to access, exists in your class path.
以下代码期望您尝试访问的资源存在于您的类路径中。
getClassLoader().getResourceAsStream(resourceName))
Assuming that your file exists in src/resources: You may add src/resources/in your classpath. I don't know which IDE are you using but here are some ways to add a directory in the classpath:
假设您的文件存在于 src/resources 中：您可以在类路径中添加src/resources/。我不知道您使用的是哪个 IDE，但这里有一些在类路径中添加目录的方法：
- Intelli J: how to add directory to classpath in an application run profile in intellij idea?
- Eclipse: How do I add a directory to the eclipse classpath?
- At run time: Can a directory be added to the class path at runtime?
- At command line: http://javarevisited.blogspot.com/2012/10/5-ways-to-add-multiple-jar-to-classpath-java.html
回答by Sagar Gangwal
InputStream resourceStream =
getClass().getResourceAsStream("/package/folder/foo.properties");
Try above code.
试试上面的代码。
Hope this will helps.
希望这会有所帮助。
回答by gorbysbm
Adding another way to do it without stream
添加另一种没有流的方法
File ourFile = new File(getClass().getClassLoader().getResource("yourFile.txt").getFile());
and then you can do things like
然后你可以做这样的事情
ourFile.getAbsolutePath()
