This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Hi all. I am in trouble with the refresh button now . It is like this: I have two jsp page ,one called a.jsp ,it has a form ,and post to b.jsp. b.jsp handles the request, and insert a record to the database,then forward back to a.jsp.At this time ,the page seems to be a.jsp ,but the address of the browser is still b.jsp .If refresh , there is one more record inserted to the database. I think if use a servlet or struts' action to do the work which b.jsp does,the problem will appear the same. If use redirect , I can't pass parameters. I have to display a "inserted done!" at the a.jsp if the record is inserted into the database ,or display "error" on the page and write-back the form data just inputed.
I wonder how to resolve this problem . Thanks in advance.
I am sorry that my English is poor.If there is something wrong with my words,please tell me .Thank you very much.
First of all, for forms that change state (like insert into a database), you should use POST, not GET. Then the browsers will at least warn you that you're about to repeat an action, and give you a chance to cancel, if you reload.