diaryservlet.java

仿校内网站

/*
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 * and open the template in the editor.
 */

package servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import myTools.DataBase;
import java.sql.*;
import myTools.TimeMaker;
/**
 *
 * @author Administrator
 */
public class DiaryServlet extends HttpServlet {
   
    /** 
    * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
    * @param request servlet request
    * @param response servlet response
    */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        String operation = (String)request.getParameter("operation");
        System.out.println(operation);
        DataBase db = new DataBase();
        ResultSet rs = null;
        db.connectToDB();
        try {
            if(operation == null){
                System.out.println("The Diary Control Is Wrong");
            }else if(operation.equals("add_diary")){
                String user_id = request.getParameter("user_id");
                String content = new String(request.getParameter("diarycontent").getBytes("ISO-8859-1"),"GB2312");
                String title = new String(request.getParameter("new_diary_title").getBytes("ISO-8859-1"),"GB2312");
                String time = TimeMaker.getTime();
                String sql = "insert into diary(diarymaker_id, diary_title, diary_date, diary_content) values ('" 
                        + user_id + "', '" + title + "', '" + time + "', '" + content + "')";
                db.executeUpdate(sql);
                response.sendRedirect("diarys.jsp");
            }
        } finally { 
            db.close();
        }
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet 方法。单击左侧的 + 号以编辑代码。">
    /** 
    * Handles the HTTP <code>GET</code> 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 <code>POST</code> 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";
    }// </editor-fold>

}