add.java

这是一个在线办公自动化系统


package com.affice;

import oa.sys.*;
import oa.sys.Time;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
 ****************************************************
 *类名称：	Add<br>
 *类功能：	增加公告信息<br>
 ****************************************************
 */
public class Add extends HttpServlet{
	private HttpSession session=null;
	private ResultSet rs=null;
	private Statement stmt=null;
	private String title,content,sqli,sqls;
	private int temp=0,id;
	
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{
		request.setCharacterEncoding("gb2312");//设定统一编码样式，解决中文显示问题
		response.setContentType("text/html; charset=gb2312");
		Str str=new Str();//获得字符串转化类中的对象
		Db db=new Db();//获得数据库连接对象
		Time time=new Time();//获得显示时间类中的对象
		PrintWriter out=response.getWriter();//获得输出流对象
		session=request.getSession();//返回和客户端关联的Session
		id=Integer.parseInt((String)session.getAttribute("id"));//获得员工登陆的ID号
		title=request.getParameter("title");//接收表单提交过来公告标题
		content=request.getParameter("content");//接收表单提交过来的公告内容
		title=str.inStr(title);//对标题进行字符串的格式转化
		content=str.inStr(content);
		sqli="INSERT INTO affice(title,time,employeeid,content)"+
		     " VALUES('"+title+"','"+time.getYMD()+"',"+id+",'"+content+"')";
		sqls="SELECT * FROM affice WHERE time='"+time.getYMD()+"'";
		try {
			stmt=db.getStmtread();
			rs=stmt.executeQuery(sqls);//执行判断今日是否已经发布了公告的SQL语句
			if(!rs.next()){//如果今日还没有发布公告
				db.close();
				stmt=db.getStmt();
				temp=stmt.executeUpdate(sqli);//执行插入的SQL语句
				if(temp>0){
					request.setAttribute("msg","发布成功");//通过"名-值"对的形式将信息保存在Request范围内
				}else{
					request.setAttribute("msg","发布失败");
				}
			}else{
				request.setAttribute("msg","今日已经发布公告，不能再发布");
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}finally{
			db.close();
			//处理完客户请求后，将请求转发到相应的JSP页来显示处理结果
			RequestDispatcher dispatcher=request.getRequestDispatcher("add.jsp");
			dispatcher.forward(request,response);
		}
	}
	//doGet()方法的执行效果和doPost()方法一样
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{
		doPost(request,response);
	}
}