CODEWITHSUNDEEP
jsp
Sandy
Sandy

Reputation: 55

deleting rows from sql through jsp

I developed a small web page which allows a user to register as a user and login. I have a admin login too wherein the admin can see all the users in the database and is able to delete or edit a user. So, I created two jsps one which is redirected when admin logs in and the other when he clicks delete. But due to some reason I am not getting directed to delete page from admin page.

admin.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@page import="java.sql.*" import="com.javadbproject.util.DBConnectionManager" import="javax.servlet.http.HttpServlet"%>
<%@ page language="java" contentType="text/html; charset=US-ASCII"
         pageEncoding="US-ASCII"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
        <title>Home Page</title>

        <link rel="stylesheet" type="text/css" href="<c:url value='/loginstyle.css'/>"> 

    </head>
    <body>
        <%
            PreparedStatement ps = null;
            ResultSet rs = null;


            Connection con = (Connection) getServletContext().getAttribute("DBConnection");
            ps = con.prepareStatement("select * from Users");
            rs = ps.executeQuery();
            while (rs.next()) {
        %>
        <table><tr><td>NAME : <%=rs.getString(1)%></td></tr>
            <tr><td>EMAIL :<%=rs.getString(2)%></td></tr>

            <tr><td><a href = "delete.jsp">Delete</a></td></tr>
        </table>

        <%
            }
            rs.close();
            ps.close();
            con.close();
        %>
        <form action="Logout" method="post">
            <input type="submit" value="Logout" >

        </form>
    </body>
</html>

delete.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@page import="java.sql.*" import="com.javadbproject.util.DBConnectionManager"%>
<%@ page language="java" contentType="text/html; charset=US-ASCII"
         pageEncoding="US-ASCII"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Delete Page</title>
    </head>
    <body>
        <%
            PreparedStatement ps = null;
            ResultSet rs = null;
            Connection con = (Connection) getServletContext().getAttribute("DBConnection");
            String name = rs.getString(1);
            ps = con.prepareStatement("delete from Users where email=?");
            ps.setString(1, name);
            rs = ps.executeQuery();
        %>
    </body>
</html>

I am new to web programming so can someone let me know where I am doing wrong.

Upvotes: 0

Views: 194

Answers (1)

blamonet
blamonet

Reputation: 680

You'll need to pass a value to delete.jsp (i.e. [email protected]) in admin.jsp and then in delete.jsp obtain this value using request.getParameter("email").

I don't have a way to test this, but you might also need to URL encode the email value, otherwise it might break your web application.

Upvotes: 1

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