package com.mhb;

 import java.io.BufferedReader;

 import java.io.File;

 import java.io.FileReader;

 import java.io.IOException;

 import java.io.PrintWriter;

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 public class FileRead extends HttpServlet {

 public void init() throws ServletException {

 }

 public void doGet(HttpServletRequest request, HttpServletResponse response)

 throws ServletException, IOException {

 response.setContentType("text/html");     //设置响应内容格式

 response.setCharacterEncoding("gb2312");    //设置响应内容编码

 PrintWriter out = response.getWriter();     //获得out对象

 String fileName = "content.txt";     //指定文件名称

 String realPath = request.getRealPath(fileName);

 File file = new File(realPath);

 if(file.exists()){

 FileReader reader = new FileReader(file);    //获得输入流

 BufferedReader bufferReader = new BufferedReader(reader); //使用缓冲流

 String line = null;     //每行数据

 while ((line = bufferReader.readLine()) != null){    //循环读取

 out.print(line +"<br />");     //输出文件内容

 }

 }else{

 out.print("文件不存在！");

 }

 }

 public void doPost(HttpServletRequest request, HttpServletResponse response)

 throws ServletException, IOException {

 }

 public void destroy() {

 super.destroy();

 }

 }

Java编程

C++编程

C#编程