Updating row using servlet

Posted by / 19-Dec-2019 21:18

all three buttons are on the same form..i am using servlet here, and the problem is i don't know how to i pass one function of one servlet as a of one button click, for a single button i just create a from and on the action i pass that servlet. Based on the flag you can process call your method.but for multiple buttons how do i do this, although i have same form on my page... The name and value of the button that is clicked will be passed as a request parameter. Loop through that enumeration checking for your button names and branch accordingly. This sort of thing is a very basic concept in JSP and servlets and will be covered in any good book on the subject.class, and a sample My SQL database table we can work with.The first thing we need for our Java UPDATE example is a sample My SQL database table.For this reason, any method in an application that executes such a method must handle the exception.All the methods in the sample application include code for handling exceptions.Inside the do Get() method uses the get Writer() method of Servlet Response interface with the reference of Http Servlet Response interface. Then establish a connection of database in java code and then deleted a specified row as in our example uses "delete from data where name = 'bipul' ".

With JDeveloper, you can define which page is to be the default run target for the application, that is, the page of the application that is displayed first, by defining it in the properties of the project.

When you will execute the example second time The database table after deleting the specified row.

Http Servlet Response; public class Delete Row extends Http Servlet Output : Initially the database was After running the example you will get the following output (when run first time).

We are assuming there are many records in this table.

In this example, we are getting the data from the database in servlet and printing it.

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Upon form submit, the name of the button will be passed as one of the form parameters and you can use that in the servlet to determine which button was clicked.