带变量的Servlet映射(Tomcat 7.0) [英] Servlet Mappings with Variables(Tomcat 7.0)
问题描述
是否可以将URL映射到servlet(可能是Tomcat特有的),以便后面的两个URL({id}是从代码中检索的变量),
Is it possible to map URLs to servlets (maybe something specific with Tomcat) so that the two following URLs (with {id}'s being variables retrievable from code),
/users/{id}/a
/users/{id}/b
映射到两个不同的servlet,或者我是否必须为映射到 / users / * <的servlet实现我自己的某种过滤器/ code>?
map to two different servlets, or will I have to implement some sort of filter of my own for a servlet mapped to /users/*
?
更清楚的是,任何带有 / users / * / a
应该映射到同一个servlet。 / users / * / b
也是如此。
To be more clear, any URL with the pattern /users/*/a
should map to the same servlet. The same goes for /users/*/b
.
推荐答案
你可以在 / users / *
上映射它,并从 HttpServletRequest#getPathInfo()
:
You could map it on /users/*
and extract information from HttpServletRequest#getPathInfo()
:
@WebServlet("/users/*")
public class UsersController extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String[] pathInfo = request.getPathInfo().split("/");
String id = pathInfo[1]; // {id}
String command = pathInfo[2]; // a or b
// ...
}
}
(省略了对数组大小的明显验证)
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