SSH common error One (result ' null ' not found) summary

Problem Description:

As shown in the figure:

when I edit the student number 11 on page 2nd, revise the student's information and save it. The process is as follows:

Click Change to jump back to page 2nd.

These are the effects I need to achieve:

Some errors occurred during the implementation, 404-result ' null ' not found,

According to the information found on the Internet, there are errors in the Struts.xml configuration file.

	<action name= "Student" class= "com.xxx.action.StudentAction" >
		<!--display Student information--
		<result name= " Show >/show.jsp</result>
		<!--ready to modify student information-
		<result name= "edit" >/update.jsp</ Result>
		<!--modify Student information-
		<result name= "Update" type= "Redirectaction" >
			<param name= " ActionName ">student!show.action</param>  
        		<param name=" CurrentPage ">${currentpage}</param >
		</result>
		<result name= "error" >/error.jsp</result>
</action>

The above is to modify the correct file.

Type= "Redirectaction is the key information of the configuration, if it does not change to appear 404-result ' null ' not found error

Here is the result of removing type= "redirectaction.

For specific content, please download

http://download.csdn.net/detail/xxx823952375/7065709