java解析properties配置文件

/**
* @author 林延涛
* @param filePath properties文件地址
* @param key properties中的key
* @return String
*/
public String readValue(String filePath,String key) {
 Properties props = new Properties();
       try {
        InputStream in = this.getClass().getResourceAsStream(filePath);
        props.load(in);
        String value =new String(props.getProperty(key).getBytes("ISO-8859-1"),"UTF-8");
        return value;
       } catch (Exception e) {
        e.printStackTrace();
        return null;
       }
}
    
    public static void main(String[] args) {
    InitialLise il=new InitialLise();
    System.out.println(il.readValue("/config/softicloud/generic/upload/uploadConfig.properties","userName"));
     }