personservlet.java

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package cn.mldn.lxh.servlet ;

import java.util.* ;
import java.io.* ;
import javax.servlet.* ;
import javax.servlet.http.* ;
import cn.mldn.lxh.factory.* ;
import cn.mldn.lxh.vo.* ;
import cn.mldn.lxh.dao.* ;

public class PersonServlet extends HttpServlet
{
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
	{
		request.setCharacterEncoding("GB2312") ;
		// 程序有两个功能：1、查询全部；2、模糊查询
		String status = request.getParameter("status") ;
		String path = "error.htm" ;
		if(status!=null)
		{
			// 查询全部
			if("selectall".equals(status))
			{
				// 1、定义没页要显示的记录数
				int lineSize = 10 ;
				// 2、定义一个当前是第几页
				int currentPage = 1 ;
				// 总记录数 / 每页显示的记录数
				int allRecorders = 0 ;
				// 实例化PersonDAO对象
				PersonDAO pdao = DAOFactory.getPersonDAOInstance() ;
				try
				{
					currentPage = Integer.parseInt(request.getParameter("cp")) ;
				}
				catch(Exception e)
				{}

				// 查询数据库
				try
				{
					// 查询全部记录数
					allRecorders = pdao.getAllCount() ;
					// 查询全部记录
					request.setAttribute("all",pdao.queryAll(currentPage,lineSize)) ;
				}
				catch (Exception e)
				{
				}

				request.setAttribute("currentPage",new Integer(currentPage)) ;
				request.setAttribute("lineSize",new Integer(lineSize)) ;
				request.setAttribute("allRecorders",new Integer(allRecorders)) ;

				path = "list_person_sp.jsp" ;
			}
			// 模糊查询
			if("selectlike".equals(status))
			{
				// 1、定义没页要显示的记录数
				int lineSize = 10 ;
				// 2、定义一个当前是第几页
				int currentPage = 1 ;
				// 总记录数 / 每页显示的记录数
				int allRecorders = 0 ;
				String keyWord = null ;

				// 接收查询关键字
				keyWord = request.getParameter("kw") ;

				// 实例化PersonDAO对象
				PersonDAO pdao = DAOFactory.getPersonDAOInstance() ;
				try
				{
					currentPage = Integer.parseInt(request.getParameter("cp")) ;
				}
				catch(Exception e)
				{}

				// 查询数据库
				try
				{
					// 查询全部记录数
					allRecorders = pdao.getByLikeCount(keyWord) ;
					// 查询全部记录
					request.setAttribute("all",pdao.queryByLike(keyWord,currentPage,lineSize)) ;
				}
				catch (Exception e)
				{
				}

				request.setAttribute("currentPage",new Integer(currentPage)) ;
				request.setAttribute("lineSize",new Integer(lineSize)) ;
				request.setAttribute("allRecorders",new Integer(allRecorders)) ;
				request.setAttribute("keyWord",keyWord) ;


				path = "list_person_sp.jsp" ;
			}
		}
		request.getRequestDispatcher(path).forward(request,response) ;
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
	{
		this.doGet(request,response) ;
	}
};