在java类中读取properties文件，可以这样一个类：

public class FetchHeaderImage {
  public String getImage(String providerName){
    String imageName = "ed_header_top_logos.jpg";
    try{  
        InputStream in = getClass().getResourceAsStream("headerImage.properties");
        Properties p = new Properties();
        p.load(in);
        imageName = p.get(providerName).toString();
    }catch(Exception e){      
      System.out.println("There is a exception");
      e.printStackTrace();
    }
    return imageName;
  }
  public static void main(String[] args){
    FetchHeaderImage hi = new FetchHeaderImage();
    String imageName = hi.getImage("dddd");
    System.out.println("imageName=" + imageName);
  }
}