Endless Endeavor

환경  :   WINDOWS7,  ECLIPSE JUNO,  JDK7,  ,TOMCAT7.0

만드실 파일 : Controller.java, Impl.java, Lislmpl.java, web.xml, start.jsp, test.jsp, test.param

    ↓ 완성파일

Test.zip

결과 화면)

 -> 

Interface

package MVC;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public interface Impl {
	public String boardImpl(HttpServletRequest req, HttpServletResponse res);
}

Class

package MVC;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Listlmpl implements Impl {

	@Override
	public String boardImpl(HttpServletRequest req, HttpServletResponse res) {
		
		return "test.jsp";
	}

}

package MVC;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Controller extends HttpServlet {
	Map map = new HashMap();

	@Override
	public void init(ServletConfig config) throws ServletException {
		String readProperties = config.getInitParameter("param");
		Properties prop = new Properties();
		FileInputStream fis = null;
		try {
			fis = new FileInputStream(readProperties);
			prop.load(fis);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		Iterator i = prop.keySet().iterator();
		while (i.hasNext()) {
			String key = (String) i.next();
			String className = prop.getProperty(key);
			try {
				Class makeClass = Class.forName(className);
				Object o = makeClass.newInstance();
				map.put(key, o);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

	public void excute(HttpServletRequest req, HttpServletResponse res)
			throws ServletException, IOException {
		String view = null;
		Impl impl = null;
		try {
			String uri = req.getRequestURI();
			if (uri.indexOf(req.getContextPath()) == 0) {
				uri = uri.substring(req.getContextPath().length());
			}
			impl = (Impl) map.get(uri);
			view = impl.boardImpl(req, res);
		} catch (Exception e) {
			e.printStackTrace();
		}
		RequestDispatcher rd = req.getRequestDispatcher(view);
		rd.forward(req, res);
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		excute(req, resp);
	}

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		excute(req, resp);
	}
}

Control.java

먼저 이파일을 하나 만든다.