actionservlet.java

jsp页面的一些关键技术,里面有我上课时的很多例子,大家不妨看看.

package com.allanlxf.ums.web;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.allanlxf.ums.action.UserAction;

@SuppressWarnings("serial")
public class ActionServlet extends HttpServlet
{
    private UserAction action = new UserAction();

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws IOException, ServletException
    {
        ActionForward forward = null;
        
        String path = request.getServletPath();
        path = path.substring(0, path.indexOf("."));

        if (path.equals("/user/register"))
        {
            forward = action.register(request, response);
        } else if (path.equals("/login"))
        {
            forward = action.login(request, response);
        } else if (path.equals("/logout"))
        {
            forward = action.logout(request, response);
        } else if (path.equals("/user/tomodify"))
        {
            forward = action.tomodify(request, response);
        } else if (path.equals("/user/modify"))
        {
            forward = action.modify(request, response);
        } else
        {
            throw new ServletException("unknown path:" + path);
        }
        
        if (forward.isRedirect())
        {
            response.sendRedirect(request.getContextPath()
                    + forward.getPath());
        } else
        {
            forward(forward.getPath(), request, response);
        }
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws IOException, ServletException
    {
        doGet(request, response);
    }

    private void forward(String path, HttpServletRequest request,
            HttpServletResponse response) throws IOException, ServletException
    {
        RequestDispatcher dispatcher = getServletContext()
                .getRequestDispatcher(path);
        dispatcher.forward(request, response);
    }
}