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megha singhal
insert data in the database using checkbox
2 Answer(s)      2 years and 11 months ago
Posted in : JSP-Servlet


i am fetching data from the database using servlet on the jsp page and there is checkbox corresponding each row but the problem is that i am not fetching data in any textboxes so how should i insert only checked data into database on submission.


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April 17, 2012 at 4:02 PM


We are providing you the code where we have specified only three fields bookid,author and title in the database. Follow these steps to update these fields:

1) Create book.jsp

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

<form name=myname method=post action="edit.jsp">
<table border="1">
<tr><td></td>
<td><b><u>bookid</u></b></td>
<td><b><u>Author</u></b></td>
<td><b><u>title</u></b></td>
</tr>
<%try{

Connection conn = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://192.168.10.112:3306/mysql","root";, "root");
ResultSet rs = null;
Statement st=null;
st=conn.createStatement();
rs = st.executeQuery("select * from book");
int i=0; while(rs.next()){ %>
<tr><td><input type="checkbox" name="check<%=i%>" value=<%= rs.getString("bookid") %>></td>
<td><%= rs.getString("bookid") %></td>
<td><%= rs.getString("author") %></td>
<td><%= rs.getString("title") %></td>
</tr><%
i++;
}
}catch(SQLException e){ System.out.println(e.getMessage()); } %>
</table>
<input type="submit">
</form>

2) Create edit.jsp

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

<%String id[]= new String[10];
for(int i=0;i<10;i++){
id[i]=request.getParameter("check"+i);
out.println(id[i]);
}
%>

<form name=myname method=post action="update.jsp">
<table border="1">
<tr>
<td><b><u>bookid</u></b></td>
<td><b><u>Author</u></b></td>
<td><b><u>title</u></b></td>
</tr>
<%try{

Connection conn = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://192.168.10.112:3306/mysql","root", "root");
ResultSet rs = null;
Statement st=null;
st=conn.createStatement();
for(int a=0;a<10;a++){
rs = st.executeQuery("select * from book where bookid='"+id[a]+"'");
while(rs.next()){ %>
<tr>
<td><input type="text" name="bid" value="<%= rs.getString("bookid") %>"></td>
<td><input type="text" name="auth" value="<%= rs.getString("author") %>"></td>
<td><input type="text" name="tit" value="<%= rs.getString("title") %>"></td>
</tr><%
}
}
}catch(SQLException e){ System.out.println(e.getMessage()); } %>
</table>

<input type="submit">
</form>


April 17, 2012 at 4:04 PM


continue........

3)Create update.jsp

<%@page import="java.sql.*"%>
<%
String d[] =request.getParameterValues("bid");
if(d !=null) {
for(int i=0;i<d.length;i++) {
out.println(d[i]);
}
}
String name[] =request.getParameterValues("auth");
if(name !=null) {
for(int i=0;i<name.length;i++) {
out.println(name[i]);
}
}
String title[] =request.getParameterValues("tit");
if(title !=null) {
for(int i=0;i<title.length;i++) {
out.println(title[i]);
}
}
%>
<%
try{
Connection conn = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://192.168.10.112:3306/mysql","root", "root");

Statement st=null;
st=conn.createStatement();
for(int a=0;a<10;a++){
String book_id=d[a];
String author=name[a];
String tit=title[a];
st.executeUpdate("update book set author='"+author+"', title='"+tit+"' where bookid='"+book_id+"'");
}
}
catch(Exception e){
e.printStackTrace();
}
%>

As we have update 3 fields in the database,in the same way you can update all the fields.



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