如何从Java中的资源目录加载文件

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属性文件,并获得空指针异常。有人可以解释怎么做吗?

Code-

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 /

2 个解决方案

#1

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 /。我不知道你使用的是哪个IDE,但是这里有一些方法可以在类路径中添加目录:

Intelli J : how to add directory to classpath in an application run profile in intellij idea?

Intelli J:如何在intellij idea中的应用程序运行配置文件中将目录添加到类路径?

Eclipse : How do I add a directory to the eclipse classpath?

Eclipse:如何将目录添加到eclipse类路径?

At run time : Can a directory be added to the class path at runtime?

在运行时:可以在运行时将目录添加到类路径吗?

At command line : http://javarevisited.blogspot.com/2012/10/5-ways-to-add-multiple-jar-to-classpath-java.html

在命令行:http://javarevisited.blogspot.com/2012/10/5-ways-to-add-multiple-jar-to-classpath-java.html

#2

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。

#1