addmessage.java

一个相对比较简单的留言簿！功能还比较齐全！

package com.pure35.servlet;

import java.io.IOException;
import java.sql.Date;


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 com.pure35.bean.SqlDate;
import com.pure35.database.MessageDao;
import com.pure35.vo.MessageVo;


public class AddMessage extends HttpServlet {

	private static final long serialVersionUID = 1L;

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

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//设置编码格式
		request.setCharacterEncoding("GBK");
		
		//取得登陆用户信息		
		HttpSession session=request.getSession();
		String  user=(String) session.getAttribute("userName");
		
		//判断用户是否存在，不存在就跳转到登陆界面
		if(user==null){			
			request.getRequestDispatcher("login.jsp").forward(request, response);
		}
		
		//得到用户提交留言信息
		String subject=request.getParameter("subject");
		String content=request.getParameter("content");
		//获得当前提交时间
		//Date mdate=SqlDate.getSqlDate();
		
		
		//把信息封装到MessageVo
		MessageVo message=new MessageVo();
		message.setContent(content);
		//message.setMdate(mdate);
		//message.setStrdate(mdate);
		message.setSubject(subject);
		message.setUsername(user);
		
		//把信息写入数据库
		MessageDao mesdao=new MessageDao();
		boolean result=mesdao.addMessage(message);
		//发表留言成功后跳转到留言显示页面
		if(result)
		{
			request.getRequestDispatcher("/ShowMessage").forward(request, response);
		}
		//失败后提示信息
	}

}