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📄 authority.java

📁 这是和jspcourseware相对应的案例。希望大家通过这个案例的学习能够系统的掌握jsp编程的思想。
💻 JAVA
字号:
🔍 
/*
 * Authority.java
 *
 * Created on 2007年4月25日, 上午9:54
 */

package servlet;

import java.io.*;
import java.sql.*;

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

/**
 *
 * @author hyl
 * @version
 */
public class Authority extends HttpServlet {
    
    /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     */
    
        private Connection con = null;
    
    public void init(ServletConfig config) throws ServletException{
        super.init(config);
        try{
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            con = DriverManager.getConnection("jdbc:odbc:school");
        }catch(ClassNotFoundException e){
            e.printStackTrace();;
        }catch(SQLException e){
            e.printStackTrace();
        }
    }
    
    public void destroy(){
        try{
            if(con != null)
                con.close();
        }catch(SQLException ignored){
            ignored.printStackTrace();
        }
    }
    
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=gb2312");
        PrintWriter out = response.getWriter();
        
//        request.setCharacterEncoding("GB2312");
        String passwordStr = request.getParameter("password");
        String nameStr1 = request.getParameter("name");
        String nameStr2 = myGB2312code.GB2312toUnicode(nameStr1,"ISO8859_1");
        String sql = "select * from manager where 密码=" + 
                passwordStr + "and 姓名=" + "'" + nameStr1 + "'" + ";";
        
        
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Locate</title>");
        out.println("</head>");
        out.println("<body>");
        
        try{
            Statement statement = con.createStatement();
            ResultSet rs = statement.executeQuery(sql);
            boolean flag = false;
            HttpSession session = request.getSession(true);
            session.setAttribute("loginState","false");
            while(rs.next())
                flag = true;
            if(flag){
                session.setAttribute("loginState","true");
                out.println("验证成功！！");
                out.println(nameStr2 + "欢迎光临本系统");
                out.println(" ");
                out.println("<p><a href =");
                out.println("'http://localhost:8084/student/ShowStudent'");
                out.println(">输出学生基本数据</a></p>");
            }else{
                out.println("验证失败");
            }
        }catch(SQLException e){
            e.getMessage();
        }
        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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