Reading Java Properties file without escaping values

configuration-files, java, properties

Solution

Why not simply extend the properties class to incorporate stripping of double forward slashes. A good feature of this will be that through the rest of your program you can still use the original `Properties` class.

public class PropertiesEx extends Properties {
    public void load(FileInputStream fis) throws IOException {
        Scanner in = new Scanner(fis);
        ByteArrayOutputStream out = new ByteArrayOutputStream();

        while(in.hasNext()) {
            out.write(in.nextLine().replace("\\","\\\\").getBytes());
            out.write("\n".getBytes());
        }

        InputStream is = new ByteArrayInputStream(out.toByteArray());
        super.load(is);
    }
}

Using the new class is a simple as:

PropertiesEx p = new PropertiesEx();
p.load(new FileInputStream("C:\\temp\\demo.properties"));
p.list(System.out);

The stripping code could also be improved upon but the general principle is there.

Problem

My application needs to use a .properties file for configuration. In the properties files, users are allow to specify paths. Problem Properties files need values to be escaped, eg ``` dir = c:\\mydir ``` Needed I need some way to accept a properties file where the values are not escaped, so that the users can specify: ``` dir = c:\mydir ```

Original source