showmsgservlet.java

oa办公系统

package cn.jx.ecjtu.oa.servlets.msg;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

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

import cn.jx.ecjtu.oa.common.Constant;
import cn.jx.ecjtu.oa.ps.pojo.LoginUser;
import cn.jx.ecjtu.oa.ps.pojo.Message;
import cn.jx.ecjtu.oa.services.MessageService;
import cn.jx.ecjtu.oa.services.Result;
import cn.jx.ecjtu.oa.services.ResultType;
import cn.jx.ecjtu.oa.services.ServiceFactory;
import cn.jx.ecjtu.oa.services.SysUserService;
import cn.jx.ecjtu.oa.services.UserInSession;

public class ShowMsgServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ShowMsgServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		HttpSession session = request.getSession();
		// 从session中取得用户id
		UserInSession user = (UserInSession) session.getAttribute(Constant.USER_IN_SESSION);		
		if (user != null) {
			int userId = user.getId();			
			// 调用service的getNewAccMsg获得指定用户的最新未读消息
			try {// 把取得的消息放入request中
				Result result = msgService.getNewAccMsg(userId);
				Message msg=(Message)result.getAttribute("message");
				LoginUser sendUser=userService.getLoginUserInfo(msg.getSendId());
				request.setAttribute("sendUser", sendUser);
				request.setAttribute("accUser", user);
				if (result.getRet() == ResultType.RET_SUCCESS) {
					for (Map.Entry<String, Object> entry : result.listAttribute().entrySet()) {
						request.setAttribute(entry.getKey(), entry.getValue());
					}
					request.getRequestDispatcher("showmsg.jsp").forward(request, response);
				}
			} catch (Exception e) {// 异常
				request.setAttribute("message", e.getMessage() + "<br/>\n");
				request.getRequestDispatcher("../error.jsp").forward(request,response);
			}
		} else {

		}

	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occure
	 */
	private MessageService msgService;
	private SysUserService userService;
	public void init() throws ServletException {
		msgService = (MessageService) ServiceFactory
				.getService(MessageService.class);
		userService = (SysUserService) ServiceFactory
		.getService(SysUserService.class);
	}

}