jsp+java类+servlet实现文件读取、写入的功能(二)

本文是根据tomcat平台下实现而做，文件目录为：
 tom_homewebapps ews下:
└html
└WEB-INF
└classes
    └com
      └FileMan.class
      └FileServlet.class
 └web.xml
接着我们先实现servlet:FileServlet .java
/*
 * FileServlet.java
 *
 * Created on 2005年6月19日, 下午3:03
 */
package com;
import java.io.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.PageContext;
/**
 *
 * @author  淘特网
 * @version
 */
public class FileServlet extends HttpServlet {

    ServletContext sc;
    /** Initializes the servlet.
     */
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        sc=config.getServletContext();

    }

    /** Destroys the servlet.
     */
    public void destroy() {

    }

    /** Processes requests for both HTTP GET and POST methods.
     * @param request servlet request
     * @param response servlet response
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        //* TODO output your page here