获取tomcat上properties文件的内容——方便文件存储位置的修改，解耦和详解编程语言

filePath=E:/file

String dir = System.getProperty("user.dir");  //获得tomcat所在的工作路径   
        System.out.println(dir); 
         
        //获取到存储了文件存储位置的filedir.properties 文件路径 
        String dir2 = dir.substring(0, dir.length()-4) + File.separator +"webapps" + File.separator + "NGBOSSmonitor" +File.separator + "WEB-INF" 
                      + File.separator + "classes" + File.separator + "META-INF" + File.separator + "config" + File.separator + "filedir.properties";

/** 
     * 获取filePath路径【properities文件】中key对应的值， 
     * @param filePath properities文件路径【包含properities文件】 
     * @param key 要查找的key值 
     * @return key对应的value 
     */ 
     public  String GetValueByKey(String filePath, String key) { 
                 Properties pps = new Properties(); 
                 try { 
                      InputStream in = new BufferedInputStream (new FileInputStream(filePath));   
                      pps.load(in); 
                     String value = pps.getProperty(key); 
                     //System.out.println(key + " = " + value); 
                     in.close(); 
                     return value; 
                      
                 }catch (IOException e) { 
                     e.printStackTrace(); 
                     return null; 
                 } 
             }