package servlet;

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 FirstServlet extends HttpServlet {

    /**

     * Constructor of the object.

     */

    public FirstServlet() {

        super();

    }

    /**

     * Destruction of the servlet. <br>

     */

    public void destroy() {

        super.destroy(); // Just puts "destroy" string in log

        // Put your code here

    }

    /**

     * The doGet method of the servlet. <br>

     *

     * This method is called when a form has its tag value method equals to get.

     *

     * @param request the request send by the client to the server

     * @param response the response send by the server to the client

     * @throws ServletException if an error occurred

     * @throws IOException if an error occurred

     */

    public void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        this.execute(request,response);

    }

    /**

     * The doPost method of the servlet. <br>

     *

     * This method is called when a form has its tag value method equals to post.

     *

     * @param request the request send by the client to the server

     * @param response the response send by the server to the client

     * @throws ServletException if an error occurred

     * @throws IOException if an error occurred

     */

    public void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        this.execute(request,response);

    }

    /**

     * Initialization of the servlet. <br>

     *

     * @throws ServletException if an error occurs

     */

    public void execute(HttpServletRequest request,HttpServletResponse response)

        throws ServletException,IOException

    {

        this.log("则行doget方法");

        response.setCharacterEncoding("UTF-8");

        request.setCharacterEncoding("UTF-8");

        String requestURI=request.getRequestURI();

        String method=request.getMethod();

        String param=request.getParameter("param");

        response.setContentType("text/html");

        PrintWriter out = response.getWriter();

        out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");

        out.println("<HTML>");

        out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");

        out.println("  <BODY>");

        out.println(method+"方式访问该页面。取到的para参数是"+param+"<br/>");

        out.println("<form action='"+requestURI+"'method='post'><input type='text' name='qqq' value='param string'><input type='submit' value='用post方式查询"+requestURI+"'></form>");

        out.println("<script>document.write('本页面最后更新时间'+document.lastModified);</script>");

        out.println("  </BODY>");

        out.println("</HTML>");

        out.flush();

        out.close();

    }

    public void init() throws ServletException {

        // Put your code here

    }

}