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Santosh
using insert and delete in a single page in jsp
2 Answer(s)      3 years and 5 months ago
Posted in : JSP-Servlet


I am using the following code in jsp to declare two javascript functions to insert and delete in a single jsp page but insert function doesn't works only delete function works even if the insert button is clicked.. So what is wrong with the code?.. If there is some other way than please tell me.

function insert()
        {
          <%
        Connection con = null;
        cat=request.getParameter("cat");
    code=request.getParameter("code");
        det=request.getParameter("det");
        charge=request.getParameter("charge");
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
        con = DriverManager.getConnection("jdbc:odbc:Hospital","Santosh"," ");

 PreparedStatement psadd=null;
    String sqladdRecord=null;


    try
    {
        sqladdRecord="insert into wards values(?,?,?,?)";
        psadd=con.prepareStatement(sqladdRecord);
        psadd.setString(1,cat);
  psadd.setString(2,code);
  psadd.setString(3,det);
  psadd.setString(4,charge);
        psadd.executeUpdate();
    }
    catch(Exception e)
    {
      response.sendRedirect("Wards.jsp");

    }

    try{
      if(psadd!=null)
      {
       psadd.close();
      }

      if(con!=null)
      {
       con.close();
      }
    }
    catch(Exception e)
    {
      e.printStackTrace(); 
    }
%>
function Delete()
        {
          <%
        Connection conn = null;
        cat=request.getParameter("cat");
    code=request.getParameter("code");
 Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
    con = DriverManager.getConnection("jdbc:odbc:Hospital","Santosh"," ");

    PreparedStatement psdel=null;
    String sqldelRecord=null;


    try
    {
        sqldelRecord="delete from wards where category='"+cat+"' and code='"+code+"'";
        psdel=con.prepareStatement(sqldelRecord);

        psdel.executeUpdate();
    }
    catch(Exception e)
    {
      response.sendRedirect("Wards.jsp");

    }

    try{
      if(psdel!=null)
      {
       psdel.close();
      }

      if(conn!=null)
      {
       conn.close();
      }
    }
    catch(Exception e)
    {
      e.printStackTrace(); 
    }

%>  

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View Answers

February 18, 2011 at 11:15 AM


JSP Insert and Delete in single page

1)application.jsp:

<%@ page import="java.sql.*" %>
<html>
<head>
<script language="javascript">
function editRecord(id){
    var f=document.form;
    f.method="post";
    f.action='edit.jsp?id='+id;
    f.submit();
}
function deleteRecord(id){
    var f=document.form;
    f.method="post";
    f.action='delete.jsp?id='+id;
    f.submit();
}
</script>
</head>
<body>

<br><br>
<form method="post" name="form">
<table border="1">
<tr><th>Name</th><th>Address</th><th>Contact No</th><th>Email</th></tr>
<%
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "test";
String driver = "com.mysql.jdbc.Driver";
String userName ="root";
String password="root";

int sumcount=0;
Statement st;
try{
Class.forName(driver).newInstance();
con = DriverManager.getConnection(url+db,userName,password);
String query = "select * from employee";
st = con.createStatement();
ResultSet rs = st.executeQuery(query);
%>

<%
while(rs.next()){
%>
<tr><td><%=rs.getString(2)%></td>
<td><%=rs.getString(3)%></td>
<td><%=rs.getString(4)%></td>
<td><%=rs.getString(5)%></td>
<td><input type="button" name="edit" value="Edit" style="background-color:#49743D;font-weight:bold;color:#ffffff;" onclick="editRecord(<%=rs.getString(1)%>);" ></td>
<td><input type="button" name="delete" value="Delete" style="background-color:#ff0000;font-weight:bold;color:#ffffff;" onclick="deleteRecord(<%=rs.getString(1)%>);" ></td>
</tr>
<%
}
%>
<%
}
catch(Exception e){
e.printStackTrace();
}
%>
</table>
</form>
</body>
</html>

2)edit.jsp:

<%@page language="java"%>
<%@page import="java.sql.*"%>
<form method="post" action="update.jsp">
<table border="1">
<tr><th>Name</th><th>Address</th><th>Contact No</th><th>Email</th></tr>
<%
String id=request.getParameter("id");
int no=Integer.parseInt(id);
int sumcount=0;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
String query = "select * from employee where id='"+no+"'";
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery(query);
while(rs.next()){
%>
<tr>
<td><input type="text" name="name" value="<%=rs.getString("name")%>"></td>
<td><input type="text" name="address" value="<%=rs.getString("address")%>"></td>
<td><input type="text" name="contact" value="<%=rs.getInt("contactNo")%>"></td>
<td><input type="text" name="email" value="<%=rs.getString("email")%>"></td>
<td><input type="hidden" name="id" value="<%=rs.getString(1)%>"></td>
</tr>
<tr>
<td><input type="submit" name="Submit" value="Update" style="background-color:#49743D;font-weight:bold;color:#ffffff;"></td>
</tr>
<%
}
}
catch(Exception e){}
%>
</table>
</form>
</form>


February 18, 2011 at 11:16 AM


continue..

3)update.jsp:

<%@page import="java.sql.*"%>

<%
String ide=request.getParameter("id");
int num=Integer.parseInt(ide);
String name=request.getParameter("name");
String address=request.getParameter("address");
int contact=Integer.parseInt(request.getParameter("contact"));
String email=request.getParameter("email");
try{
Connection conn = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root", "root");
Statement st=null;
st=conn.createStatement();
st.executeUpdate("update employee set name='"+name+"',address='"+address+"',contactNo="+contact+",email='"+email+"' where id='"+num+"'");
response.sendRedirect("/examples/jsp/application.jsp");
}
catch(Exception e){
System.out.println(e);
    }
%>

4)delete.jsp:

<%@page import="java.sql.*"%>
<%

String id=request.getParameter("id");
int no=Integer.parseInt(id);
int sumcount=0;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
Statement st = conn.createStatement();
st.executeUpdate("DELETE FROM employee WHERE id = '"+no+"'");
response.sendRedirect("application.jsp");
}
catch(Exception e){}
%>


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