servlet+mysql分页(上一页，下一页)

index.jsp

  	查看所有学生  
  

FindAll.java

package com.servlet;

import java.io.IOException;

import java.io.PrintWriter;
import java.util.ArrayList;

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

import com.dao.StudentDao;
import com.daoImpl.StudentDaoImpl;
import com.entity.Student;

public class FindAll extends HttpServlet {
	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {		
		StudentDao sd=new StudentDaoImpl();
		
		String str=request.getParameter("n");	
		
		//总行数
		int lineCount=sd.countStudent();
		//每页的行数
		int pageSize=7;
		//总共的页数
		int pageCount=(int)Math.ceil(lineCount*1.0/pageSize);
		
		int n = 1;
				
		if(str == null || str.equals("")){
			n = 1;
		}else if(str.equals("a")){
			 n = (Integer)request.getSession().getAttribute("pageNow");
			n--;
		}else if(str.equals("b")){
			 n = (Integer)request.getSession().getAttribute("pageNow");
			n++;
		}else if(str.equals("1")){
			n=1;
		}else{
			n=pageCount;
		}	
		
		if(n>pageCount){
			n=pageCount;
		}
		if(n<1){
			n=1;
		}	
		
		
		request.getSession().setAttribute("pageNow", n);
		request.getSession().setAttribute("pageCount", pageCount);	
		
		ArrayList list=sd.getAllStudent(n,pageSize);	
		
		request.getSession().setAttribute("list", list);		
		response.sendRedirect("showAllStudent.jsp");
	}

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

}

showAllStudent.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="com.entity.Student"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
        
        
  
  
  
   	
   		
   		<%
   			ArrayList list=(ArrayList)session.getAttribute("list");
   			for(Student s:list){
   		 %>   		 
   			
   			<%
   			}
   			 %>   			
   		

   			

   			
学号
姓名
性别
年龄
班级
DID
生日
   			
成绩
英文名
电话
   			
操作
   			

   				
<%=s.getSid()%>
   				
<%=s.getSname()%>
   				
<%=s.getSsex()%>
   				
<%=s.getSage()%>
   				
<%=s.getSclass()%>
   				
<%=s.getDid()%>
   				
<%=s.getSbir()%>
   				
<%=s.getSscore()%>
   				
<%=s.getSename()%>
   				
<%=s.getSphone()%>
   				
编辑
   				
删除
   			
   		
   			




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