web应用读取webRoot中的文件

private String getTxT(HttpServlet servlet, String fileName){String result = "";try {// D:\apache-tomcat-6.0.18\webapps\web_pro_name\  String projectPath = servlet.getServletContext().getRealPath("/");  String filePath = projectPath+fileName;FileReader reader;reader = new FileReader(filePath);BufferedReader br = new BufferedReader(reader);String s = null;while ((s = br.readLine()) != null) {result += s;}br.close();reader.close();} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}return result;}