logincontroller.java

简单的MVC实现

package pojo;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

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

public class LoginController implements Controller{

	public ModelAndView handerRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
		// TODO Auto-generated method stub
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		if("esun".equals(username)&&"esun".equals(password)){
			Map<String,Object> model = new HashMap<String,Object>();
			model.put("username", username);
			model.put("greet", "Welcome!");
			model.put("time", new Date().toString());
			return new ModelAndView("/welcome.jsp",model);
		}
		Map<String,Object> error = new HashMap<String,Object>();
		error.put("message", "Login failed");
		error.put("time", new Date().toString());
		return new ModelAndView("/loginFailed.jsp",error);
	}
	
}