newstypeservlet.java

一个由jsp+servlet+MySQL简单的新闻发布系统

package com.news.servlet;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

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

import com.news.bean.NewsType;
import com.news.dao.NewsTypeDao;
import com.news.dao.impl.NewsTypeDaoImpl;

public class NewsTypeServlet extends HttpServlet{

	@Override
	public void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		
		NewsType nt = new NewsType();
		NewsTypeDao dao = new NewsTypeDaoImpl();
		String cmd = req.getParameter("cmd");
		String id = req.getParameter("id");//("id");//("id");
		String name = req.getParameter("name");
		String sort = req.getParameter("sort");//("sort");
		//System.out.println("cmd"+"=="+cmd+"id"+"=="+id+"name"+"=="+name+"sort"+"=="+sort);
		if(id!=null){
			nt.setId(Integer.valueOf(id));
		}
		nt.setName(name);
		if(sort!=null){
			nt.setSort(Integer.valueOf(sort));
		}
		if (cmd != null) {
			if (cmd.equals("list")) {
				List<NewsType> list = dao.list(new HashMap());
				req.setAttribute("list", list);
				req.getRequestDispatcher("newsTypeList.jsp").forward(req,
						resp);
			} else if (cmd.equals("add")) {
				dao.add(nt);
				resp.sendRedirect("newstype?cmd=newsTypelist");
			} else if (cmd.equals("loadedit")) {
				dao.get(Integer.valueOf(id));
				req.setAttribute("newsType", nt);
				req.getRequestDispatcher("newsTypeEdit.jsp").forward(req, resp);
			} else if (cmd.equals("edit")) {
				dao.edit(nt);
				System.out.println("cmd.equals('edit')"+"=="+cmd.equals("edit"));
				System.out.println("dao.edit(nt)"+"=="+dao.edit(nt));
				//req.getSession().setAttribute("succ", "1");
				resp.sendRedirect("newsType?cmd=list");
			} else if (cmd.equals("delete")) {
				dao.del(Integer.valueOf(id));
				resp.sendRedirect("newsType?cmd=list");
			} else if(cmd.equals("sort")){
				HashMap map = new HashMap();
				List<NewsType> list = (List)dao.list(map);
				req.setAttribute("list", list);
				req.getRequestDispatcher("news?cmd=loadedit").forward(req, resp);
			}
		}
	}
	@Override
	public void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		this.doPost(req, resp);
	}
}