java - 用Java读取属性文件

Question

我有以下代码试图读取属性文件:

Properties prop = new Properties();
ClassLoader loader = Thread.currentThread().getContextClassLoader();           
InputStream stream = loader.getResourceAsStream("myProp.properties");
prop.load(stream);

最后一行出现异常。具体来说:

Exception in thread "main" java.lang.NullPointerException
at java.util.Properties$LineReader.readLine(Properties.java:418)
at java.util.Properties.load0(Properties.java:337)
at java.util.Properties.load(Properties.java:325)
at Assignment1.BaseStation.readPropertyFile(BaseStation.java:46)
at Assignment1.BaseStation.main(BaseStation.java:87)

谢谢，尼科斯

Answer 1

根据您的异常，InputStream 为空，这意味着类加载器未找到您的属性文件。我猜 myProp.properties 在你的项目的根目录中，如果是这样，你需要一个前面的斜杠:

InputStream stream = loader.getResourceAsStream("/myProp.properties");