src/com/sanqing/servlet/MsgPublish.java

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package com.sanqing.servlet;

import java.io.IOException;
import java.util.Date;

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

import com.sanqing.bean.Employee;
import com.sanqing.bean.Message;
import com.sanqing.dao.EmployeeDAO;
import com.sanqing.dao.MessageDAO;
import com.sanqing.factory.EmployeeDAOFactory;
import com.sanqing.factory.MessageDAOFactory;

public class MsgPublish extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("gbk");		//设置参数编码
		String title = request.getParameter("title");//获得用户输入的标题
		String content = request.getParameter("content");//获得用户输入的标题
		ServletContext servletContext = getServletContext();
		RequestDispatcher dispatcher = null;
		//是哪个员工发布的消息
		Employee employee = (Employee) request.getSession().getAttribute("employee");
		if(employee == null) {
			request.setAttribute("error", "要发布消息必须首先进行身份识别");
			dispatcher = servletContext.
					getRequestDispatcher("/publishNewMsg.jsp");//跳转回消息发布页面
		}else {
			if(title == null || "".equals(title)) { //如果用户没有输入标题
				request.setAttribute("error", "必须输入消息标题");
				dispatcher = servletContext.
						getRequestDispatcher("/publishNewMsg.jsp");//跳转回消息发布页面
			}else {
				Message message = new Message();//实例化Message对象
				message.setEmployeeID(employee.getEmployeeID());//设置发布人编号
				message.setMessageTitle(title);//设置消息标题
				message.setMessageContent(content);//设置标题内容
				message.setPublishTime(new Date());//设置发布日期
				MessageDAO messageDAO = 
					MessageDAOFactory.getMessageAOInstance();//获得MessageDAO实例
				messageDAO.addMessage(message);		//添加消息
				dispatcher = servletContext.
				getRequestDispatcher("/GetMessageList");//跳转回消息发布页面
			}
		}
		dispatcher.forward(request, response);//进行页面跳转
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}