Output The JavaScript dialog box in the Action, and call pageContext on the jsp page

Today, my friend asked me a question: in the action, if the operation is successful, I want to give the user a javascript dialog box to prompt that the operation is successful.

I thought about it and said that it would not be enough to output a javascript dialog box using the out object. She told me that I tried it. This is not the case. I thought about it again. That's a different method, save the Script script to pagecontext, and then call the script code that outputs pagecontext on the success page.

Although I have never tried it, the second method should be acceptable, but she told me that I couldn't do it, so I couldn't understand it, and I was too lazy to try it, however, the findforword () method in the action will jump to other JSP pages or servlet pages. You may not be able to output the out object in the current action.