how to use bean to retrieve data from database

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how to use bean to retrieve data from database
2 Answer(s)      6 years and 4 months ago
Posted in : JDBC

how to use bean to retrieve data from database

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May 2, 2011 at 11:11 AM


1)EmpBean.java:

package form;
import java.sql.*;
import java.util.*;
public class EmpBean {

public List dataList(){
ArrayList list=new ArrayList();
try{
     Class.forName("com.mysql.jdbc.Driver");
           Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
           Statement st=con.createStatement();
           ResultSet rs=st.executeQuery("select * from employee");
           while(rs.next()){
               list.add(rs.getString("name"));
               list.add(rs.getString("address"));
               list.add(rs.getString("contactNo"));
               list.add(rs.getString("email"));

}
}
catch(Exception e){}
return list;

}
}

2)BeanInServlet.java:

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

public class BeanInServlet extends HttpServlet{
    protected void doGet(HttpServletRequest req, HttpServletResponse res)
        throws ServletException, IOException{
        form.EmpBean p = new form.EmpBean();
        List list=p.dataList();

        req.setAttribute("data", list);
        RequestDispatcher rd = req.getRequestDispatcher("/jsp/beandata.jsp");
        rd.forward(req, res);
    }
}

3)beandata.jsp:

<[email protected] language="java" import="java.util.*" %>
<html>
<body> 
<table border="1" width="303">
<tr>
<td width="119"><b>Name</b></td>
<td width="168"><b>Address</b></td>
<td width="119"><b>Contact no</b></td>
<td width="168"><b>Email</b></td>
</tr>
<%Iterator itr;%>
<% List data= (List)request.getAttribute("data");
for (itr=data.iterator(); itr.hasNext(); ){
%>
<tr>
<td width="119"><%=itr.next()%></td>
<td width="168"><%=itr.next()%></td>
<td width="168"><%=itr.next()%></td>
<td width="168"><%=itr.next()%></td>
</tr>
<%}%>
</table>
</body>
</html>


April 13, 2012 at 7:12 PM


**I am pradeep kundu. I am making program in struts in which i want to insert, delete & search data. I can delete data but i am not getting any response**.


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