configutil.java

封装了SQL、Socket、WAP、MIME等功能的通用组件

package org.lazybug.util;

import java.util.Properties;
import java.io.*;


/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: www.lazybug.com Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author 刘学
 * @version 1.0
 */

public class ConfigUtil
{
    public static String WEB_PATH = "";
    public static String APP_CONFIGPATH = "";
    public static String APP_PATH = "";
    private static long lastModify = 0;
    private static Properties Config = new Properties();

    public static void setPath(String path)
    {
        int i;
        if( ( i=path.lastIndexOf("bin") ) != -1 )
        {
            APP_PATH = path.substring(0, i);
        }
        else
        {
            APP_PATH = path;
        }
        APP_CONFIGPATH = APP_PATH + "config/config.properties";

        loadConfig();
    }

    private static void loadConfig()
    {
        try
        {
            File fobj = new File(APP_CONFIGPATH);
            if (fobj.exists())
            {
                FileInputStream fis = new FileInputStream(fobj);
                Config.load(fis);
                fis.close();
                lastModify = fobj.lastModified();
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    public static int getInteger(String id)
    {
        String result;
        if (id == null)
        {
            return 0;
        }
        if (Config.size() == 0)
        {
            loadConfig();
        }
        else
        {
            File file = new File(APP_CONFIGPATH);
            if(file.lastModified() > lastModify)
            {
                lastModify = file.lastModified();
                loadConfig();
            }
        }
        result = Config.getProperty(id,id);
        if( result.equals(id))
        {
            result = "-1";
        }
        return Integer.parseInt(result);
    }

    public static void setString(String id, String value)
    {
        if (id == null || value == null || id.equals("") || value.equals(""))
        {
            return;
        }

        if (Config.size() == 0)
        {
            loadConfig();
        }

        Config.setProperty(id, value);
    }
    /*
     * Read the information from Config table
     */
    public static String getString(String id)
    {
        String result;
        if (id == null)
        {
            return "";
        }
        if (Config.size() == 0)
        {
            loadConfig();
        }
        else
        {
            File file = new File(APP_CONFIGPATH);
            if(file.lastModified() > lastModify)
            {
                lastModify = file.lastModified();
                loadConfig();
            }
        }
        result = Config.getProperty(id, "");

        return result;
    }
}