myhost/userservice/registration
myhost/userservice/login
myhost/userservice/anotherAction
public class UserServiceServlet extends HttpServlet { public void registration(HttpServletRequest request, HttpServletResponse response) { //.... } public void login(HttpServletRequest request, HttpServletResponse response) { //.... } public void anotherAction(HttpServletRequest request, HttpServletResponse response) { //.... } }
public class BaseServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { try { String method = getMethod(req); // , "login" "trampampam"; if (method != null && !"".equals(method)) { callMethod(method, req, resp); // } } catch (Exception e) { // log exception req.getRequestDispatcher(WebPages.PAGE_404).forward(req, resp); } } private String getMethod(HttpServletRequest request) { String method = request.getPathInfo(); // , "/login" if (!"".equals(method)) { return method.substring(1, method.length()); // "/" } return null; } private void callMethod(String method, HttpServletRequest request, HttpServletResponse response) throws Exception // this.getClass().getDeclaredMethod(method, HttpServletRequest.class, HttpServletResponse.class).invoke(this, request, response); } }
public class UserServiceServlet extends BaseServlet { public void registration(HttpServletRequest request, HttpServletResponse response) { //.... } public void login(HttpServletRequest request, HttpServletResponse response) { //.... } public void anotherAction(HttpServletRequest request, HttpServletResponse response) { //.... } }
<servlet> <servlet-name>User</servlet-name> <servlet-class>mypackage.UserServiceServlet</servlet-class> </servlet><servlet-mapping> <servlet-name>User</servlet-name> <url-pattern>/userservice/*</url-pattern> </servlet-mapping>
Source: https://habr.com/ru/post/119648/
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