带有属性文件的 FileNotFoundException [英] FileNotFoundException with properties file

问题描述

我正在尝试从 backupData.properties 读取一些道具.它位于WEB-INF/classes/.我就是这样做的:

I'm trying to read some props from backupData.properties. It locates in WEB-INF/classes/. This is how I do:

public class Configures {

    private static final String INPUT_FILE = "WEB-INF//classes//backupData.properties"; 


    public static String getMail() {
        Properties prop = new Properties();
        try {
            //load a properties file
            prop.load(new FileInputStream(INPUT_FILE));

            //get the property value
            return prop.getProperty("mail");

        } catch (IOException ex) {
            ex.printStackTrace();
        }
        return null;
    }
}

INPUT_FILE 应该包含什么?我试图把它放在 src 中，比如 src//backupData.properties，但它抛出 FileNotFoundException.我用谷歌搜索该文件应该位于 CLASSPATH(据我所知在 WEB-INF/classes 中).怎么了?

What INPUT_FILE should contain? I was trying to put it in src, like src//backupData.properties, but it throws FileNotFoundException. I googled that file should locate in CLASSPATH(in WEB-INF/classes as I understood). What is wrong?

附注.我正在使用 Spring.

推荐答案

这与 Spring 无关.如果您正在部署 Web 应用程序，WEB-INF/classes 中的所有内容都将从类路径的根目录开始显示.

This has nothing to do with Spring. If you are deploying a web application, everything in WEB-INF/classes will appear starting at the root of the classpath.

您可以使用

InputStream in = Configures.class.getResourceAsStream("/backupData.properties");
prop.load(in);

由于 Web 应用程序并不总是从其 .war 文件中提取，因此实际的属性文件可能仅作为 zip 条目存在.因此，您不能(也不应该)使用 FileInputStream 检索它.

Since a web application is not always extracted from its .war file, the actual properties file might only exist as a zip entry. As such, you can't (and shouldn't) retrieve it with FileInputStream.

这是 javadoc.

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