forward and redirect in Spring MVC
In Spring MVC, when we return to the logical view, the framework parses the specific view with viewresolver and renders it to the browser. Assuming that the logical view is named Hello, through configuration, we
Configure a viewresolver as follows:
XML code <bean class= "Org.springframework.web.servlet.view.InternalResourceViewResolver" > <description> If the logic tries to name "Hello", Viewresolver will parse into/web-inf/jsp/hello.jsp </description> <property name= " Order "value="/> <property name= "prefix" value= "/web-inf/jsp/"/> <property name= "suffix" valu E= ". jsp"/> </bean>
In fact, the framework is forwarded to the/web-inf/jsp/hello.jsp by means of forward. If the logical view name is/hello, it is actually forwarded to/web-inf/jsp/hello.jsp, that is,/web-inf/jsp//hello.jsp is equivalent to/web-inf/jsp/hello.jsp.
Now there is a problem, if/hello is a controller mapping, I want to forward to this controller, what to do. We can pass
forward prefix to achieve the purpose of forwarding to other resources:
Java code Public String handle () {//return "Forward:/hello" = + forwards to controller capable of matching/hello//return "he Llo "+" is actually forwarded, except that the framework will find the view corresponding to the logical views name and render//return "/hello" + with Return "Hello" return "Forward:/hell O "; }
Similarly, if we want to redirect to a resource, we can
redirect prefix to achieve the purpose of redirection to other resources:
Java code public string handle () { // Redirect to /hello Resources return "Redirect:/hello"; }
