运行jar包读取外部配置文件

测试路径：

	public static void main(String[] args) {
		String path1 = System.getProperty("user.home");//当前登录用户目录
		String path2 = System.getProperty("user.dir");//jar包所在目录名
		System.out.println(path1+"=="+path2);
	}

 使用列子：

 public static void main(String[] args) {
        try {
            PropContainer pro = PropContainer.getInstance(System
                    .getProperty("user.dir")
                    + File.separator
                    + "config.properties");
            InitExcelData.init(pro.getProperty("excelPath"));

            String sourcePath = pro.getProperty("sourcePath");
            String tempPath = pro.getProperty("tempPath");
            String destPath = pro.getProperty("destPath");
            String errorPath = pro.getProperty("errorPath");
            String bakPath = pro.getProperty("bakPath");
            String isBak = pro.getProperty("isBak");
       } catch (Exception e) {
            log.info(e.getMessage());
            e.printStackTrace();
        }

    }

public class PropContainer {
    private static final Logger log = Logger.getLogger(PropContainer.class);

    private Properties properties;

    private static String charset = "UTF-8";

    private static Map<String, PropContainer> map = new HashMap<String, PropContainer>();

    private PropContainer(String propertiesWay) {
        initConfig(propertiesWay);
    }

    public static PropContainer getInstance(String propertiesWay) {
        if (map.containsKey(propertiesWay)) {
            return map.get(propertiesWay);
        }
        PropContainer p = new PropContainer(propertiesWay);
        map.put(propertiesWay, p);
        return p;
    }

    private void initConfig(String propertiesWay) {
        properties = new Properties();
        try (InputStreamReader in = new InputStreamReader(new FileInputStream(
                propertiesWay), charset)) {
            properties.load(in);
        } catch (Exception e) {
            log.error("", e);
        }
    }

    public String getProperty(String key, String defaultValue) {
        if (properties == null) {
            return defaultValue;
        }
        return properties.getProperty(key, defaultValue);
    }
    
    public String getProperty(String key) throws RuntimeException{
        String tmp = properties.getProperty(key);
        if(StringUtils.isBlank(tmp)){
            throw new RuntimeException("属性为空！"+key);
        }
        return tmp;
    }

    public int getInt(String key, int defaultValue) {
        String prop = getProperty(key, "");
        if ("".equals(prop) || !NumberUtils.isDigits(prop)) {
            return defaultValue;
        }
        return Integer.parseInt(prop);
    }

    public boolean containsKey(String key) {
        if (properties != null && properties.containsKey(key)) {
            return true;
        }
        return false;
    }
}