Java类中国际化的读取

/**
 * 
 * 国际化文件的读取
 * <功能详细描述>
 * @author  zengqiang
 * @version  [版本号, 2009-8-18]
 * @see  [相关类/方法]
 */
public class Internationalization
{  
    private static Map<String, String> languageMap = new HashMap<String, String>();
    
    private static String PATH = null;
    
    /**
     * 初始化PATH
     */
    @SuppressWarnings("static-access")
    public Internationalization(String projectName)
    {
        this.PATH =
            PortalHelper.getInstance().getURL("dpf_dms") == null ? System.getProperty("catalina.home")
                + File.separatorChar + "webapps" + projectName + File.separatorChar + "WEB-INF" + File.separatorChar
                + "classes" + File.separatorChar : PortalHelper.getInstance().getURL("dpf_dms") + File.separatorChar
                + "WEB-INF" + File.separatorChar + "classes" + File.separatorChar;
    }
    
    /** 读取国际化文件
     * @param language 语种
     * @throws IOException 
     */
    public static String getProperties(String language, String key)
        throws IOException
    {
        DebugLogger.inf("getProperties  method param language:" + language + "  param key:" + key);
        if (null != languageMap.get("language"))
        {
            if (language.equals(languageMap.put("language", language)))
            {
                Properties propertys;
                try
                {
                    propertys = Tools.loadProperties(PATH + "dpf_" + language + ".properties");
                    if (null != key)
                    {
                        return propertys.getProperty(key);
                    }
                }
                catch (InitException e1)
                {
                    DebugLogger.err("loadProperties  to  Exception", e1);
                    e1.printStackTrace();
                }
            }
            else
            {
                languageMap.put("language", language);
            }
        }
        else
        {
            languageMap.put("language", language);
        }
        return null;
    }  
    /**
     * 根据国际化名称得到值
     */
    public static String getProperty(String key)
    {
        DebugLogger.inf("getProperty  method  param key:" + key);
        try
        {
            return getProperties(languageMap.get("language"), key);
        }
        catch (IOException e)
        {
            DebugLogger.err("getProperty  to  Exception", e);
            e.printStackTrace();
        }
        return "Key_Error";
    }    
}
public final class Tools{
     public static Properties loadProperties(String fileURL)
        throws InitException
    {
        Properties prop = new Properties();
        FileInputStream in = null;
        try
        {
            File f = new File(fileURL);
            if (!f.exists())
            {
                throw new InitException("Can't find  properties file from  URL [" + f.getAbsolutePath() + "].");
            }
            in = new FileInputStream(f);
            prop.load(in);
        }      
        catch (IOException e)
        {
            
        }
    }
}