How get value from dropdown in database in JSP?

How to create dynamic drop down list in JSP from database

1. Create Database. Suppose that you want to display items in a drop down list from the following table in a MySQL database:
2. Create Java Model Class. Code for the model class that represents an item in the drop down list is as simple as below:

Which function is used to get the selected value of drop down?

To change the selected value of a drop-down list, use the val() method.

How get value from select option react?

To fetch the selected value from the select element, you can use the onChange event handler prop. Just like the input or textarea elements, you can use the onChange event handler to get the value from the event object. Now, make this select input element controlled by using the state to pass the value.

How do you check if an item is selected from an HTML drop down list?

You can check if the index of the selected value is 0 or -1 using the selectedIndex property. I believe this is the most simple in all aspects unless you call the validate function be other means. With no/null/empty value to your first option is easier to validate.

How can we retrieve data from database using servlet?

Program to display data from database through servlet and JDBC

1. import java.io.*;
2. import javax.servlet.*;
3. import javax.servlet.http.*;
4. import java.sql.*;
5. public class display extends HttpServlet.
6. {
7. public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException.
8. {

Which method is used to get the parameter value from request object?

getParameter
getParameter(String name) – This method is used to get the value of a request’s parameter.

How to create a dropdown list in JSP page?

For creating a Dropdown list there is a tag in HTML given below that you can embed it into your JSP page. Size of the options is controlled by the browser and if you want to limit the size of list to be shown you can use the ‘size’ attribute of tag.

How do I create a list from a list in JSP?

In the JSP page, inside the Sricplet tag you do the following, Create your list. Use tag outside of your loop. Use a loop. But the boundary condition should be .size(). Inside your loop use an tag.

How to add value attribute to a list in JSP?

In the JSP page, inside the Sricplet tag you do the following, Create your list. Use tag outside of your loop. Use a loop. But the boundary condition should be .size (). Inside your loop use an tag. Then, the (*) this place replaced with your .get (index). This is your value attribute.

How to select an item from drop down list using Servlet?

The code of the servlet class is now looks like this: Suppose that the category table already has some rows, you can see the result looks like the following screenshot: Select an item from the drop down list, and click Submit. You should see the page is refreshed with the selected item is the one you have selected.