jsp+java类+servlet实现文件读取、写入的功能(二)

发布: 2007-7-01 18:47 | 作者: admin | 来源: | 查看: 29次 | 进入软件测试论坛讨论

本文是根据tomcat平台下实现而做，文件目录为：

tom_home\webapps\news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
        out.println("");
        out.println("");
        out.println("");
        out.println("");
        out.println("");
        out.println("Hello");
        out.println(sc.getRealPath("/"));
        FileMan fm=new FileMan();
try
{
fm.WriteFile(sc.getRealPath("/")+"/html/test.htm","asf");
out.println(fm.ReadFile(sc.getRealPath("/")+"/html/test.htm"));
}
catch(FileNotFoundException e){}
        out.println("");
        out.println("");
        // */
        out.close();
    }

    /** Handles the HTTP GET method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** Handles the HTTP POST method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** Returns a short description of the servlet.
     */
    public String getServletInfo() {
        return "Short description";
    }

}