[Share] JSP page loading process in struts

In struts, when a JSP file is successfully published on Tomcat, we can access this page. But on the server side, how does the JSP page be loaded?

Step 1: If the <Bean: Message> label exists, the text is read from the resource bundle.

Step 2: the most important thing is that the <HTML: Form> tag first looks for the actionform bean instance from the actionform bean corresponding to its action. If it exists, the bean corresponds to the page element, so the page can be filled. If the bean does not exist (the bean may not have been initialized for the first time when you enter coconut), ignore this operation.

Step 3: Present the JSP page.

In particular, the second step is the key to initializing the page.

It is not difficult, but it is easy to mix with dynamic actionform bean and write it specially for sharing.