Java servlet url mapping, url pattern

Question

i'm doing a News project.We have news category, news sub category, and news detail page. I want to have url like :

Category page : "http://mysite.com/my-dynamic-category".
Sub Category page : "http://mysite.com/my-dynamic-category/sub-category".
News detail page : "http://mysite.com/my-dynamic-category/sub-category/my-new-alias.html".

Three servlet : CategoryServlet, SubcategoryServlet, NewsDetailServlet. How can i map url with corresponding servlet in web.xml ? I am using eclipse and tomcat server.

So the categories will be dynamic and not static won't they? If so, you could use request params to handly, which category should be used — Matthias Bruns
– Matthias Bruns, Commented Feb 9, 2012 at 10:32
yes, category and sub category are dynamic. Can you show me a little example with request params ? — xuanhung2401
– xuanhung2401, Commented Feb 9, 2012 at 10:43
CONTEXT_ROOT/SOME_SERVLET/?maincategory=myMainCategory&subcategory=mysubcategory where maincategory and subcategory are the parameters and myMainCategory and mysubcategory are their values — Matthias Bruns
– Matthias Bruns, Commented Feb 9, 2012 at 10:47
UrlRewriteFilter solved my problem.Btw, thank you very much. — xuanhung2401
– xuanhung2401, Commented Feb 9, 2012 at 10:58

Kris · Accepted Answer · 2012-02-09 10:26:17Z

2

I guess that for this kind of task simple url mapping in web.xml is not enough. If you want to have dynamic urls mapped to your web resources (eg. servlets) you would have to do some url rewriting. The simplest would be to look for some URL Rewriting filter like the one from Tuckey with tutorial here: http://urlrewritefilter.googlecode.com/svn/trunk/src/doc/manual/3.2/index.html

answered Feb 9, 2012 at 10:26

Kris

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Stephen Ostermiller · Accepted Answer · 2012-02-09 10:30:46Z

1

I map all urls into a single servlet in my webapp and let the web app itself decide how to serve them:

<servlet>
  <servlet-name>dispatcher</servlet-name>
  <servlet-class>com.myapp.Dispatcher</servlet-class>
</servlet>
<servlet-mapping>
  <servlet-name>dispatcher</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>

The disadvantage is that my servlet container no longer serves static files, I have to write code to load them and serve them through the web app or serve them on apache and configure it to not reverse proxy to tomcat for any static files.

answered Feb 9, 2012 at 10:30

Stephen Ostermiller♦

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2 Comments

xuanhung2401 Over a year ago

i thought about it (like Strut framework), but looking for better way. May be urlrewritefilter is that way. Let me try. Thank you.

Stephen Ostermiller Over a year ago

This person has an elegant way to deal wit the static content by extension: stackoverflow.com/a/3582215/1145388

Ecstasy Forum · Accepted Answer · 2012-02-09 10:28:48Z

0

If your sub-category is static, then you may use the url mapping as /*/sub-category where * maps to CategoryServlet.java, from there you may get the request path which contains /dynamic-category/sub-category, you may extract your sub-category and dynamic-category. With this you can also use only one servlet.

answered Feb 9, 2012 at 10:28

Ecstasy Forum

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Paul Whelan · Accepted Answer · 2012-02-09 12:09:42Z

0

Eclipse has nothing with your problem, you could as well use vi or emacs. Your problem can be solved by URL rewriting ( either on reverse proxy side, or by something like: http://www.tuckey.org/urlrewrite/ ) - just remap your good locking URLs to real servlets.

Or you could just use a filter, parse the servlet path and use information to render your templates.

edited Feb 9, 2012 at 12:09

Paul Whelan

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answered Feb 9, 2012 at 10:23

Konstantin Pribluda

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kisp · Accepted Answer · 2014-04-04 08:12:26Z

0

Maybe you should consider using Jersey.
Here is a plain servlet solution: http://software.danielwatrous.com/restful-java-servlet/

answered Apr 4, 2014 at 8:12

kisp

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