java读properties的通用类，兼容linux和windows

1.前言。
  如题。
2.代码。

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;

/**
 * 读取Properties综合类
 * @author lijn
 * 2014-02-25
 */
public class PropertiesUtil {
	/**
	 * 得到某一个类的路径
	 * 
	 * @param name
	 * @return
	 */
	public static 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;
	}
	/**
	 * 读取所有的property
	 * @param filename properties文件路径
	 * @return 所有的property的集合(map形式)
	 */
	@SuppressWarnings("unchecked")
	public static Map<String, String> getPropties(String filename) {
		if (null == filename) {
			return null;
		}
		String filePath = getPath(PropertiesUtil.class) + filename;
		Properties props = new Properties();
		InputStream in = null;
		try {
			in = new BufferedInputStream(new FileInputStream(filePath));
			props.load(in);
			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;
			// 关闭资源
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				in.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return null;
	}
	/**
	 * 获取某个property的值
	 * @param filename 文件名
	 * @param key  property的key
	 * @return property的value
	 */
	public static String getProp(String filename, String key) {
		if (null == filename || null == key) {
			return null;
		}
		String filePath = getPath(PropertiesUtil.class) + filename;
		Properties props = new Properties();
		InputStream in = null;
		try {
			in = new BufferedInputStream(new FileInputStream(filePath));
			props.load(in);
			return props.getProperty(key);
			// 关闭资源
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				in.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return null;
	}
}