Spring - Rewrite one URL to another
-
22-09-2019 - |
Question
I have a Spring 2.5 application that contains a Flash banner. I don't have the source for the Flash component but it has links hardcoded to certain pages that end in .html
I want to be able to redirect those .html pages to existing jsp pages. How can I have Spring resolve a few .html pages to .jsp pages?
My project looks like:
WebContent
|
-sample.jsp
-another.jsp
WEB-INF
|
-myapp-servlet.xml
-web.xml
I want localhost:8080/offers.html
to redirect to localhost:8080/sample.jsp
Can I do this with Spring? I already have a SimpleUrlHandlerMapping and UrlFilenameViewController defined in the myapp-servlet.xml that has to continue serving the pages it already is.
In my web.xml, I have
<servlet-mapping>
<servlet-name>myapp</servlet-name>
<url-pattern>*.htm</url-pattern>
</servlet-mapping>
Update
Here is the URL mapper. If I add a controller, how do I return the jsp view that is in the WebContent directory as the view resolver includes the /WEB-INF/jsp directory.
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/page1.htm">page1Controller</prop>
<prop key="/page2.htm">page2Controller</prop>
</props>
</property>
</bean>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
Solution
I think you could benefit from the open source URL Rewriting library made by tuckey.org. The guys at SpringSource endorse this library, since it is set up for you automatically if you use Spring Roo to create a project, so it is of good quality. I have used it successfully in a number of projects.
See here for its homepage. And Skaffman is right, you want it to 'forward' instead of redirect, which is the default behaviour.
Configure it in web.xml like this:
<filter>
<filter-name>UrlRewriteFilter</filter-name>
<filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class>
</filter>
Then, in WEB-INF/urlrewrite.xml have an element like this:
<rule>
<from>offers.html</from>
<to>offers.jsp</to>
</rule>
OTHER TIPS
I would use OCPsoft PrettyFaces or OCPsoft Rewrite for this:
With PrettyFaces:
create WEB-INF/pretty-config.xml
<url-mapping>
<pattern value="/offers.html" />
<view-id value="/offers.jsp" />
</url-mapping>
With Rewrite:
ConfigurationBuilder.begin()
.addRule(Join.path("/offers.html").to("/offers.jsp"));
I hope this helps.
~Lincoln
Firstly, I'm assuming that when you say "redirect", you really mean "forward". HTTP Redirects would not be appropriate here.
SO given that, here are some things to try:
Can't you just move the JSP files from
WebContent
into/WEB-INF/jsp/
? You wouldn't have to change theViewResolver
definition, then.You could try to have the controllers return a view name of something like
../../another.jsp
, and hope that the servlet container resolves to/WEB-INF/jsp/../../another.jsp
to/another.jsp
.The
ViewResolver
is only consulted if the controllers return the name of a view. Your controllers don't have to return the name of a view, they can return aView
object directly, in this case aJstlView
. This can point to whichever JSP you like. You can some controllers returning view names, and some returningView
objects.Remove the
prefix
property from your view resolver. This means you'd also have to change every existing controller, to prefix every view name they return with/WEB-INF/jsp/
. Then you could refer to the JSPs underWebContent
by name.