📄 articleservlet.java

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/*
 * ArticleServlet.java
 *
 * Created on 2008��1��11��, ����1:16
 */

package ArticleSharing;

import java.io.*;
import java.net.*;
import java.text.SimpleDateFormat;
import java.util.Locale;

import javax.servlet.*;
import javax.servlet.http.*;

/**
 *
 * @author Snow
 * @version
 */
public class ArticleServlet 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 {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        DBTools db = new DBTools();
        String command = request.getParameter("command");
        
        if ("insert".equals(command)) {
            String title = request.getParameter("title");
            String author = request.getParameter("author");
            String article = request.getParameter("article");
            title = DBTools.changeCharset(title, "ISO-8859-1", "utf-8");
            author = DBTools.changeCharset(author, "ISO-8859-1", "utf-8");
            article = DBTools.changeCharset(article, "ISO-8859-1", "utf-8");   // �ַ��ת��
            
            String date = new SimpleDateFormat("yyyy-MM-dd",Locale.SIMPLIFIED_CHINESE).format(new java.util.Date());
            
            String sql = "insert into posts(post_title, post_content, post_date, poster_name) values('" + title + "','"
                       + article + "','" + date + "','" + author + "')";
            db.excuteUpdate(sql);
            
            response.sendRedirect("articlelist.jsp");
        }
        
        if ("modify".equals(command)) {
            String id = request.getParameter("id");
            String title = request.getParameter("title");
            String author = request.getParameter("author");
            String article = request.getParameter("article");
            title = DBTools.changeCharset(title, "ISO-8859-1", "utf-82");
            author = DBTools.changeCharset(author, "ISO-8859-1", "utf-8");
            article = DBTools.changeCharset(article, "ISO-8859-1", "utf-8");   // �ַ��ת��
            
            String date = new SimpleDateFormat("yyyy-MM-dd",Locale.SIMPLIFIED_CHINESE).format(new java.util.Date());
            
            String sql = "update posts set post_title='" + title + "',poster_name='" + author + "', post_content='" + article
                       + "', post_date='" + date + "' where post_id='" + id + "'";
            db.excuteUpdate(sql);
            
            response.sendRedirect("managerArticle.jsp");
        }
        
        if ("delete".equals(command)) {
            String id = request.getParameter("id");
            
            // ɾ������
            String sql = "delete from posts where post_id='" + id + "'";
            db.excuteUpdate(sql);
            
            // ɾ������µ�����
            sql = "delete from responses where post_id='" + id + "'";
            db.excuteUpdate(sql);
            
            response.sendRedirect("managerArticle.jsp");
        }
        /* TODO output your page here
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Servlet ArticleServlet</title>");
        out.println("</head>");
        out.println("<body>");
        out.println("<h1>Servlet ArticleServlet at " + request.getContextPath () + "</h1>");
        out.println("</body>");
        out.println("</html>");
         */
        out.close();
    }
    
    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 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>
}
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