How to get system path of web application java

public String getPath() throws UnsupportedEncodingException {
  String path = this.getClass().getClassLoader().getResource("").getPath();
  String fullPath = URLDecoder.decode(path, "UTF-8");
  String pathArr[] = fullPath.split("/WEB-INF/classes/");
  System.out.println(fullPath);
  System.out.println(pathArr[0]);
  fullPath = pathArr[0];
  
  String reponsePath = "";
// to read a file from webcontent
  reponsePath = new File(fullPath).getPath() + File.separatorChar + "newfile.txt";
  return reponsePath;
 }