web.xml 거치지 않고 Servlet 내에서 해결하기

exerDispatcher.java

package ex01.ex01; import java.io.IOException; import java.util.ArrayList; import java.util.HashMap; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /**  * Servlet implementation class exerDispathcer  */ public class exerDispatcher extends HttpServlet { private static final long serialVersionUID = 1L; HashMap map = new HashMap();             /**      * @see HttpServlet#HttpServlet()      */     public exerDispatcher() {                map.put("/EleServlet.im", new EleServlet());        //     map.put("", new ());     } /**  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)  */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPostGet(request,response); } /**  * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)  */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPostGet(request,response); } protected void doPostGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ String path = request.getServletPath(); System.out.println(path); defaultAction action = (defaultAction)map.get(path); System.out.println(action+" <= is path mapping"); String result = action.execute(request,response); request.getRequestDispatcher(result).forward(request, response); } public void test() throws ClassNotFoundException, InstantiationException, IllegalAccessException{ Class clz = Class.forName("ex01.ex01.EightthServlet"); EightthServlet test= (EightthServlet)clz.newInstance(); test.myExecute(); } }

DefaultAction.java

package ex01.ex01; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public interface defaultAction { public String execute(HttpServletRequest request, HttpServletResponse response); }

EleServlet.java

package ex01.ex01; import java.io.IOException; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /**  * Servlet implementation class EightthServlet  */ @WebServlet("/EleServlet") public class EleServlet implements defaultAction{ private String id = null; public String execute(HttpServletRequest request, HttpServletResponse response){ String result = null; System.out.println("EleServlet loaded"); String id = request.getParameter("id"); result = "jsp/EleServletjsp.jsp"; return result; } }

web.xml

<servlet>     <description></description>     <display-name>FirstServlet</display-name>     <servlet-name>FirstServlet</servlet-name>     <servlet-class>ex01.ex01.exerDispatcher</servlet-class>   </servlet>   <servlet-mapping>     <servlet-name>FirstServlet</servlet-name>     <url-pattern>*.im</url-pattern>   </servlet-mapping>    </web-app>