читаем проперти в utf8

gistfile1.java

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.Properties;

public class Toster {
    public static void main(String[] args) throws IOException {
        Properties p = new Properties();
        p.load(new InputStreamReader(new FileInputStream("D:\\tmp\\test.properties"), Charset.forName("UTF8")));
        System.out.println(p);
    }
}