JAVA讀取classess下的.properties配置檔案封裝類，linux和windows上都可以使用

http://hi.baidu.com/myzhijie/item/3f73e988aef52bd85e0ec131import java.io.BufferedInputStream;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

/**
 * 讀取Properties綜合類
 * @author
 */
public class PropertiesUtil {
   
    /**
     * 配置檔案物件
     */
    private Properties props=null;
   
    /**
     * 建構函式
     * @param fileName 配置檔名稱
     */
    public PropertiesUtil(String fileName){
        String filePath=getPath(PropertiesUtil.class) + fileName;
        props = new Properties();
        try {
            InputStream in = new BufferedInputStream(new FileInputStream(filePath));
            props.load(in);
            //關閉資源
            in.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
   
    /**
     * 根據key值讀取配置的值
     * Jun 26, 2010 9:15:43 PM
     * @author 朱志傑
     * @param key key值
     * @return key 鍵對應的值
     * @throws IOException
     */
    public String readValue(String key) throws IOException {
        return  props.getProperty(key);
    }
   
    /**
     * 讀取properties的全部資訊
     * Jun 26, 2010 9:21:01 PM
     * @author 朱志傑
     * @throws FileNotFoundException 配置檔案沒有找到
     * @throws IOException 關閉資原始檔，或者載入配置檔案錯誤
     *
     */
    public Map<String,String> readAllProperties() throws FileNotFoundException,IOException  {
        //儲存所有的鍵值
        Map<String,String> map=new HashMap<String,String>();
        Enumeration en = props.propertyNames();
        while (en.hasMoreElements()) {
            String key = (String) en.nextElement();
            String Property = props.getProperty(key);
            map.put(key, Property);
        }
        return map;
    }

    /**
     * 得到某一個類的路徑
     * @param name
     * @return
     */
    private String getPath(Class name) {
        String strResult = null;
        if (System.getProperty("os.name").toLowerCase().indexOf("window") > -1) {
            strResult = name.getResource("/").toString().replace("file:/", "")
                    .replace("%20", " ");
        } else {
            strResult = name.getResource("/").toString().replace("file:", "")
                    .replace("%20", " ");
        }
        return strResult;
    }
}