Load Properties file in java

Question

I am not able to load property file using below snippet

    URL configURL = null;
    URLConnection configURLConn = null;
    InputStream configInputStream = null;
    currConfigProperties = new Properties();
    try {
        String configPropertiesFile = getParameter("propertiesFile");
        if (configPropertiesFile == null) {
            configPropertiesFile = "com/abc/applet/Configuration.properties";
        }
        System.out.println("configPropertiesFile :"+configPropertiesFile);
        configURL = new URL(getCodeBase(), configPropertiesFile);
        configURLConn = configURL.openConnection();
        configInputStream = configURLConn.getInputStream();
        currConfigProperties.load(configInputStream);
    } catch (MalformedURLException e) {
        System.out.println(
            "Creating configURL: " + e);
    } catch (IOException e) {
        System.out.println(
            "IOException opening configURLConn: "
                + e);
    }

Getting java.io.FileNotFoundException exception.

I guess this will work => configPropertiesFile = "src/com/abc/applet/Configuration.properties" — Juvanis
– Juvanis, Commented Mar 19, 2013 at 11:24
Presumably this is an applet loading from a remote server? Or are you trying to read from the classpath? Either way, try the ClassLoader.getResourceAsStream method. — Boris the Spider
– Boris the Spider, Commented Mar 19, 2013 at 11:25

pbespechnyi · Accepted Answer · 2013-03-19 11:43:45Z

3

In case when your properties file in the same place with your class:

Properties properties = new Properties();
try {
    properties.load(getClass().getResourceAsStream("properties.properties"));
} catch (IOException e) { /*File Not Found or something like this*/}

I case when your properties is in the root folder of your class files:

Properties properties = new Properties();
try {
    properties.load(getClass().getClassLoader().getResourceAsStream("properties.properties"));
} catch (IOException e) { /*File Not Found or something like this*/}

Also you can pass the pass to your properties file with -DmyPropertiesFile=./../../properties.properties and then get it System.getProperty("myPropertiesFile").

edited Mar 19, 2013 at 11:43

answered Mar 19, 2013 at 11:34

pbespechnyi

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Comments

Rahul · Accepted Answer · 2013-03-19 11:27:23Z

1

You can load your properties file in java class in this way:-

InputStream fileStream = new FileInputStream(configPropertiesFile);
currConfigProperties.load(fileStream);

Also, change your property file path to src/com/abc/applet/Configuration.properties

Also you can use this to load it from the classpath:-

currConfigProperties.load(this.getClass().getResourceAsStream(configPropertiesFile));

answered Mar 19, 2013 at 11:27

Rahul

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Boris the Spider · Accepted Answer · 2013-03-19 11:30:11Z

0

From the OP's comment loading is from the class path. So the ClassLoader needs to be used,

public void load() {
    getClass().getResourceAsStream("my/resource");
}

public static void loadStatic() {
    Thread.currentThread().getContextClassLoader().getResourceAsStream("my/resource");
}

The first method needs to be in an instance context, the second will work from a static context.

answered Mar 19, 2013 at 11:30

Boris the Spider

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Du-Lacoste · Accepted Answer · 2019-03-19 03:29:24Z

0

You can try this as well.

public static void loadPropertiesToMemory() {
    Properties prop = new Properties();
    InputStream input = null;
    String filePathPropFile = "configuration.properties";
    try {
        input = App.class.getClassLoader().getResourceAsStream(filePathPropFile);
        prop.load(input);
    } catch (IOException ex) {
        ex.printStackTrace();
    } 
}

App is the class where you have the above method implemented.

answered Mar 19, 2019 at 3:29

Du-Lacoste

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