jsp第六次作业

<%@page import="java.nio.channels.SeekableByteChannel"%>
<%@ page language="java" contentType="text/html" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<html>
<head>
<title>www.school.com</title>
</head>
<body>
    <%!public static final String DBDRIVER = "com.mysql.jdbc.Driver";
    public static final String DBURL = "jdbc:mysql://localhost:3306/jspwork";
    public static final String DBUSER = "root";
    public static final String DBPASS = "root";%>
    <%
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        boolean flag = false;
        String name = null;
    %>
    <%
        try {
            Class.forName(DBDRIVER);
            conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);
            String sql = "SELECT uname FROM num_one WHERE uid=? AND upwd=?";
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, request.getParameter("id"));
            pstmt.setString(2, request.getParameter("password"));
         
            rs = pstmt.executeQuery();
            if (rs.next()) {
                name = rs.getString(1);
                flag = true;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (rs != null)
                    rs.close();
                if (pstmt != null)
                    pstmt.close();
                if (conn != null)
                    conn.close();
                if (flag) {
                 request.getSession().setAttribute("uname",name);
                 request.getRequestDispatcher("ok.jsp").forward(request,response);
                 
                   // request.getRequestDispatcher("ok.jsp").forward(request, response);
                } else {
                    response.sendRedirect("no.jsp");
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    %>
 
</body>
</html>

<%@page import="java.nio.channels.SeekableByteChannel"%>
<%@ page language="java" contentType="text/html" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<html>
<head>
<title>www.school.com</title>
</head>
<body>
    <%!public static final String DBDRIVER = "com.mysql.jdbc.Driver";
    public static final String DBURL = "jdbc:mysql://localhost:3306/jspwork";
    public static final String DBUSER = "root";
    public static final String DBPASS = "root";%>
    <%
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        boolean flag = false;
        String name = null;
    %>
    <%
        try {
            Class.forName(DBDRIVER);
            conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);
            String sql = "SELECT uname FROM num_one WHERE uid=? AND upwd=?";
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, request.getParameter("id"));
            pstmt.setString(2, request.getParameter("password"));
         
            rs = pstmt.executeQuery();
            if (rs.next()) {
                name = rs.getString(1);
                flag = true;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (rs != null)
                    rs.close();
                if (pstmt != null)
                    pstmt.close();
                if (conn != null)
                    conn.close();
                if (flag) {
                 request.getSession().setAttribute("uname",name);
                 request.getRequestDispatcher("ok.jsp").forward(request,response);
                 
                   // request.getRequestDispatcher("ok.jsp").forward(request, response);
                } else {
                    response.sendRedirect("no.jsp");
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    %>
 
</body>
</html>

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原文地址：https://www.cnblogs.com/zxp-0101/p/14649682.html