About struts2 Configuration

[Html] <filter-name> struts2 </filter-name> <filter-class> org. apache. struts2.dispatcher. ng. filter. strutsPrepareAndExecuteFilter </filter-class> </filter> <filter-mapping> <filter-name> struts2 </filter-name> <url-pattern>/* </url-pattern> </filter-mapping> changed to [html] <filter-name> struts2 </filter-name> <filter-class> org. apache. struts2.dispatcher. ng. filter. strutsPrepareAndExecuteFilter </filter-class> </filt Er> <filter-mapping> <filter-name> struts2 </filter-name> <url-pattern> *. action </url-pattern> </filter-mapping> and then add [html] <filter-mapping> <filter-name> struts2 </filter-name> <url-pattern> *. jsp </url-pattern> </filter-mapping> can access the home page later. However, after login, the page on the right of the page can be displayed, but not on the left, put the right and left pages in a frameset [html] <frame src = "user_login! JumpLeft "name =" left "frameborder =" 0 "framespacing =" 0 "marginwidth =" 0 "marginheight =" 0 "scrolling =" auto "noresize =" noresize "> Why? *. left. jsp cannot be displayed