基于分页插件的分页

一、技术
(1)后台：java、mysql
(2)前端：js、jquery、css、jstl、分页的插件（jquery.pagination.js）
二、思想
前端(页码)=>后台servlet(页码，页大小)=>后台service(页码，页大小)=>后台jdbc(开始行，页大小)=>数据库(开始行，页大小)
三、工程布局图

四、效果图

五、代码

1.com.oracle.dao包：
package com.oracle.dao;

import java.util.List;

import com.oracle.vo.Product;

public interface ProductDao {
	//select * from product limit 0,5;
	public List<Product> getUserByLimit(int startRow,int pageSize);
	
	//查询 总记录数
	public int getProductsCount();
}

========================
package com.oracle.dao;

import com.oracle.vo.User;

public interface UserDao {
	 public User getUser(String name,String password);
}

2.com.oracle.daoImpl包：
package com.oracle.daoImpl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import com.oracle.dao.ProductDao;
import com.oracle.util.DBTools;
import com.oracle.vo.Product;

public class ProductDaoImpl implements ProductDao {

	@Override
	public List<Product> getUserByLimit(int startRow, int pageSize) {
		String sql = "select * from product limit ?,?";
		List<Product> products = null;
		try {
			 products = DBTools.queryMore(sql, Product.class, startRow,pageSize);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return products;
	}

	@Override  //sql 语句的 别名
	public int getProductsCount() {
		String sql = "select count(*) as count from product";
		
		Connection conn = DBTools.getLocalConn();
		
		PreparedStatement ps = null;
		int count = 0;
		try {
			ps = conn.prepareStatement(sql);
			ResultSet rs = ps.executeQuery();
			while(rs.next()){
				count = rs.getInt(1);
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return count;
	}

}

====================

package com.oracle.daoImpl;

import com.oracle.dao.UserDao;
import com.oracle.util.DBTools;
import com.oracle.vo.User;

public class UserDaoImpl implements UserDao {

	@Override
	public User getUser(String name, String password) {
		String sql = "select * from user where name = ? and password = ?";
		User user = null;
		try {
		 user = DBTools.queryOne(sql, User.class, name,password);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return user;
	}

}

3.com.oracle.service包：
package com.oracle.service;

import com.oracle.vo.Pager;
import com.oracle.vo.Product;

/**
 * 
 * 之前学习的 业务层 返回 集合 的 这件事 已经 结束了
 *  从此以后 业务层 要返回一个  
 *    分页 对象  类名 为 ：Pager/Pagination： 
 *      分页对象中 包含: 之前的 回显数据	 和   页面的 页码，总页数的相关信息
 * 
 * @author Administrator
 *
 */
public interface ProductService {
	
	public Pager<Product> getProductsByLimit(int pageNo,int pageSize);
	
}
===================

package com.oracle.service;

import com.oracle.vo.User;

/**
 * 业务层
 * @author Administrator
 *
 */
public interface UserService {
	 //登录
	public User login(String name,String password);
}

4.com.oracle.serviceImpl包：
package com.oracle.serviceImpl;

import java.util.List;

import com.oracle.dao.ProductDao;
import com.oracle.daoImpl.ProductDaoImpl;
import com.oracle.service.ProductService;
import com.oracle.vo.Pager;
import com.oracle.vo.Product;

public class ProductServiceImpl implements ProductService {

	ProductDao ps = new ProductDaoImpl();
	
	@Override
	public Pager<Product> getProductsByLimit(int pageNo, int pageSize) {
		//计算 开始行
		int startRow = (pageNo- 1)*pageSize;
		
		List<Product> products = ps.getUserByLimit(startRow, pageSize);
		
		//select count(*) from product;
		//获取 数据库的 总记录数
		int totalRecord = ps.getProductsCount();
		
		Pager<Product> pager = new Pager<>(pageNo, pageSize, totalRecord, products);
		
		return pager;
	}
}
=====================
package com.oracle.serviceImpl;

import com.oracle.dao.UserDao;
import com.oracle.daoImpl.UserDaoImpl;
import com.oracle.service.UserService;
import com.oracle.vo.User;

public class UserServiceImpl implements UserService{
	
	UserDao userDao = new UserDaoImpl();
	
	//登录
	@Override
	public User login(String name, String password) {
		return userDao.getUser(name, password);
	}

}

5.com.oracle.servlet包：
package com.oracle.servlet;

import java.io.IOException;

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.oracle.service.ProductService;
import com.oracle.serviceImpl.ProductServiceImpl;
import com.oracle.vo.Pager;
import com.oracle.vo.Product;

public class ProductServlet extends HttpServlet {
	
	private static final long serialVersionUID = -318134993070614515L;
	
	private ProductService ps = new ProductServiceImpl();
	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		HttpSession session = request.getSession();
		String flag = request.getParameter("flag");
		if("pageForm".equals(flag)){
			String pageNumStr = request.getParameter("pageNum");
			
			  if(null == pageNumStr) {
            	  pageNumStr="1";
              }
			  
		    int pageNum = Integer.parseInt(pageNumStr);
			Pager<Product> result = ps.getProductsByLimit(pageNum, 5);
			
			session.setAttribute("pager", result);
			//response.sendRedirect("main.jsp");
			response.getWriter().write("success");
		}else{
			String pageNumStr = request.getParameter("pageNum"); 
			
              if(null == pageNumStr) {
            	  pageNumStr="1";
              }
              int pageNum = Integer.parseInt(pageNumStr);
			Pager<Product> result = ps.getProductsByLimit(pageNum, 5);
			
			session.setAttribute("pager", result);
			response.sendRedirect("main.jsp");
		}
	}
		

}
======================
package com.oracle.servlet;

import java.io.IOException;

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.oracle.service.UserService;
import com.oracle.serviceImpl.UserServiceImpl;
import com.oracle.vo.User;

public class UserServlet extends HttpServlet {
	
	UserService us =new UserServiceImpl();
	
	private static final long serialVersionUID = 1L;
	
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		//servlet 就是用来接收 页面的请求的
		String name = request.getParameter("name");
		String pwd = request.getParameter("password");
		
		HttpSession session = request.getSession();
		
		User user = us.login(name, pwd);
		
		if(null != user){
			//存session
			session.setAttribute("user", user);
			
			//登录成功 去 productServlet
			request.getRequestDispatcher("productServlet").forward(request, response);
		}
	}
}

6.com.oracle.util
package com.oracle.util;

import java.io.InputStream;
import java.lang.reflect.Field;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

public class DBTools {

	// ? 是用来携带参数的 & 多个参数 连接
	private static String DRIVER = null;
	private static String URL = null;
	private static String USERNAME = null;
	private static String PASSWORD = null;

	static Connection conn = null;

	private static ThreadLocal<Connection> local = new ThreadLocal<>();

	private static PreparedStatement ps;
	private static ResultSet rs;

	static {
		try {
			// 内容 在 db.properties 文件中
			InputStream ips = DBTools.class.getClassLoader().getResourceAsStream("config/db.properties");

			Properties p = new Properties();
			// 加载 流
			p.load(ips);

			DRIVER = p.getProperty("jdbc.driver");
			URL = p.getProperty("jdbc.url");
			USERNAME = p.getProperty("jdbc.username");
			PASSWORD = p.getProperty("jdbc.password");
			Class.forName(DRIVER);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static Connection getLocalConn() {
		// 先在 ThreadLocal 类中取连接
		Connection conn = local.get();
		if (null == conn) {
			// 如果 为空 就 设置一个 连接
			local.set(DBTools.getConn());
			// 在取出 刚才 设置的连接
			conn = local.get();
		}
		// 返回
		return conn;
	}

	public static Connection getConn() {
		// 使用 驱动 管理器 获取 连接
		try {
			conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return conn;
	}

	public static void close(Connection conn, PreparedStatement ps, ResultSet rs) {
		try {
			if (rs != null) {
				rs.close();
			}
			if (ps != null) {
				ps.close();
			}
			if (null != conn) {
				conn.close();
			}
		} catch (Exception e) {
			System.out.println("资源未关闭");
		}

	}

	/**
	 * 完成 DML 操作
	 * 
	 * preparedStatement();
	 * 
	 * insert into update delete
	 * 
	 * @throws SQLException
	 * 
	 */
	public static boolean executeUpdate(String sql, Object... args) throws Exception {
		conn = DBTools.getLocalConn();

		ps = conn.prepareStatement(sql);
		// 给 ? 赋值
		for (int i = 0; i < args.length; i++) {
			ps.setObject(i + 1, args[i]);
		}

		// 执行sql语句
		int a = ps.executeUpdate();

		return a > 0 ? true : false;
	}

	/**
	 * 查询一条记录 select * from user where id = ?; select * from user where uname =
	 * ? and password = ?;
	 * 
	 * @throws Exception
	 */
	public static <T> T queryOne(String sql, Class<T> c, Object... args) throws Exception {
		conn = DBTools.getLocalConn();

		ps = conn.prepareStatement(sql);
		// 给 ? 赋值
		for (int i = 0; i < args.length; i++) {
			ps.setObject(i + 1, args[i]);
		}

		rs = ps.executeQuery();
		// 通过 结果集 获取 元数据
		ResultSetMetaData metaData = rs.getMetaData();

		int count = metaData.getColumnCount();

		T t = null;
		while (rs.next()) {
			t = c.newInstance();

			for (int i = 1; i <= count; i++) {
				String col_name = metaData.getColumnName(i);
				Object col_value = rs.getObject(i);

				Field field = c.getDeclaredField(col_name);
				// 设置属性的访问权限 注释 ： 因为 set 方法 只适用于 public修饰的 属性
				field.setAccessible(true);
				// 给当前属性赋值
				field.set(t, col_value);
			}
		}
		return t;
	}

	/**
	 * 查询多条记录 
	 * select * from user; select * from user where uname like ? select *
	 * from user where uname like ? limit ?,?
	 * 
	 * @throws Exception
	 * 
	 */
	public static <T> List<T> queryMore(String sql, Class<T> c, Object... args) throws Exception {
		List<T> list = new ArrayList<>();

		conn = DBTools.getLocalConn();

		ps = conn.prepareStatement(sql);
		// 给 ? 赋值
		for (int i = 0; i < args.length; i++) {
			ps.setObject(i + 1, args[i]);
		}

		rs = ps.executeQuery();
		// 通过 结果集 获取 元数据
		ResultSetMetaData metaData = rs.getMetaData();

		int count = metaData.getColumnCount();

		T t = null;
		while (rs.next()) {
			t = c.newInstance();

			for (int i = 1; i <= count; i++) {
				String col_name = metaData.getColumnName(i);
				Object col_value = rs.getObject(i);

				Field field = c.getDeclaredField(col_name);
				// 设置属性的访问权限 注释 ： 因为 set 方法 只适用于 public修饰的 属性
				field.setAccessible(true);
				// 给当前属性赋值
				field.set(t, col_value);
			}
			list.add(t);
		}
		return list;
	}
	
	public static <T> List<T> queryMoreTwo(String sql, Class<T> c, List<Object> lists) throws Exception {
		List<T> list = new ArrayList<>();

		conn = DBTools.getLocalConn();

		ps = conn.prepareStatement(sql);
		// 给 ? 赋值
		for (int i = 0; i < lists.size(); i++) {
			ps.setObject(i + 1, lists.get(i));
		}

		rs = ps.executeQuery();
		// 通过 结果集 获取 元数据
		ResultSetMetaData metaData = rs.getMetaData();

		int count = metaData.getColumnCount();

		T t = null;
		while (rs.next()) {
			t = c.newInstance();

			for (int i = 1; i <= count; i++) {
				String col_name = metaData.getColumnName(i);
				Object col_value = rs.getObject(i);

				Field field = c.getDeclaredField(col_name);
				// 设置属性的访问权限 注释 ： 因为 set 方法 只适用于 public修饰的 属性
				field.setAccessible(true);
				// 给当前属性赋值
				field.set(t, col_value);
			}
			list.add(t);
		}
		return list;
	}

}
==========================
package com.oracle.util;
/**
 * 常量类
 */
public class Constants {
	
	public static final int PAGE_SIZE = 5;

}
====================
package com.oracle.util;

import java.lang.reflect.InvocationTargetException;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.BeanUtils;

/**
 * 自定义 封装 工具类 将  页面中的 数据 封装到 vo | pojo | entity 实体中 
 *  
 * 前提 ： input 标签中的 name属性名  必须域 vo 实体中的属性名 一致 
 *
 */
public class BeanUtil {
	//获取有 值的 实体了
	public static void getBean(Object obj,HttpServletRequest request){
		try {
			BeanUtils.populate(obj, request.getParameterMap());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	
	
}

7.com.oracle.vo
package com.oracle.vo;

import java.io.Serializable;
import java.util.List;

/**
 * 将 数据  和 页码 相关的信息 都 整合在 这个 实体类中 
 */
public class Pager<T> implements Serializable{
	
	private static final long serialVersionUID = 1L;
	
	private Integer pageNo;//页码  用户 点击 的 第几页
	private Integer pageSize;// 页 大小   每 页 多少条记录
	private Integer currentPage; //当前页   
	private Integer totalPage; //总页数 
	private Integer totalRecord; //总 记录数   数据库 数据条数
	
	private List<T> list;
	
	public Pager() {
	}
	
	public Pager(Integer pageNo, Integer pageSize, Integer totalRecord,
			List<T> list) {
		//页码
		this.pageNo = pageNo;
		//页大小
		this.pageSize = pageSize;
		//总记录数
		this.totalRecord = totalRecord;
		//总页数
		this.totalPage = this.totalRecord / this.pageSize;
		if(this.totalRecord % this.pageSize != 0 ){
			this.totalPage =  this.totalPage + 1;
		}
		//当前页
		this.currentPage = this.totalPage < pageNo ? this.totalPage : pageNo;
		
		//数据
		this.list = list;
	}

	public Integer getPageNo() {
		return pageNo;
	}

	public void setPageNo(Integer pageNo) {
		this.pageNo = pageNo;
	}

	public Integer getPageSize() {
		return pageSize;
	}

	public void setPageSize(Integer pageSize) {
		this.pageSize = pageSize;
	}

	public Integer getCurrentPage() {
		return currentPage;
	}

	public void setCurrentPage(Integer currentPage) {
		this.currentPage = currentPage;
	}

	public Integer getTotalPage() {
		return totalPage;
	}

	public void setTotalPage(Integer totalPage) {
		this.totalPage = totalPage;
	}

	public Integer getTotalRecord() {
		return totalRecord;
	}

	public void setTotalRecord(Integer totalRecord) {
		this.totalRecord = totalRecord;
	}

	public List<T> getList() {
		return list;
	}

	public void setList(List<T> list) {
		this.list = list;
	}

} 
====================
package com.oracle.vo;

import java.io.Serializable;

public class Product implements Serializable{

	private Integer id;
	private String pname;
	private Double price;
	private String remark;

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getPname() {
		return pname;
	}

	public void setPname(String pname) {
		this.pname = pname;
	}

	public Double getPrice() {
		return price;
	}

	public void setPrice(Double price) {
		this.price = price;
	}

	public String getRemark() {
		return remark;
	}

	public void setRemark(String remark) {
		this.remark = remark;
	}

	@Override
	public String toString() {
		return "Product [id=" + id + ", pname=" + pname + ", price=" + price + ", remark=" + remark + "]";
	}

}
=======================
package com.oracle.vo;

import java.io.Serializable;

public class User implements Serializable {

	private Integer id;
	private String name;
	private Integer age;
	private Integer gender;
	private String password;
	private String realName;

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Integer getAge() {
		return age;
	}

	public void setAge(Integer age) {
		this.age = age;
	}

	public Integer getGender() {
		return gender;
	}

	public void setGender(Integer gender) {
		this.gender = gender;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getRealName() {
		return realName;
	}

	public void setRealName(String realName) {
		this.realName = realName;
	}

	@Override
	public String toString() {
		return "User [id=" + id + ", name=" + name + ", age=" + age + ", gender=" + gender + ", password=" + password
				+ ", realName=" + realName + "]";
	}

}

前端
1.css
/PagerDemo/WebContent/css/pagination.css
.pagination {
            font-size: 80%;
        }
        
.pagination a {
    text-decoration: none;
	border: solid 1px #AAE;
	color: #15B;
}

.pagination a, .pagination span {
    display: block;
    float: left;
    padding: 0.3em 0.5em;
    margin-right: 5px;
	margin-bottom: 5px;
	min-width:1em;
	text-align:center;
}

.pagination .current {
    background: #26B;
    color: #fff;
	border: solid 1px #AAE;
}

.pagination .current.prev, .pagination .current.next{
	color:#999;
	border-color:#999;
	background:#fff;
}
2./PagerDemo/WebContent/login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ include file="top.jsp"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<base href="<%=basePath%>">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link  href="css/test.css">
<title>登录</title>
</head>
<body>
<form action="userServlet" method="post">
<input type="hidden" value="login" name="flag">
 <span><font color="red">${flag==false?"用户或密码错误":"" }</font></span><br/> 
  用户名：
 <input type="text" name="name" value="${sessionScope.user.name }">
 <br/>
 密码：&nbsp;&nbsp;&nbsp;&nbsp;
 <input type="text" name="password" value="${sessionScope.user.password }">
 <br/>
 
 記住用戶名: <input type="checkbox" name="remeber" ${sessionScope.remember==1 ? "checked" : ""}/><br/>
<input type="submit" value="提交"  />
<a href="register.jsp" >注册</a>
</form>
</body>
</html>
3./PagerDemo/WebContent/main.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ include file="top.jsp"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<base href="<%=basePath%>">
<link type="text/css" rel="stylesheet" href="css/pagination.css">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>主页</title>
</head>
<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
<script type="text/javascript" src="js/jquery.pagination.js"></script>
<script type="text/javascript">

function handlePaginationClick(new_page_index,pagination_container){
	
	 $.ajax({
	 	  data: {pageNum: new_page_index+1, flag: "pageForm"},
	 	  type: "POST",
	 	  url: "productServlet",
	 	  success: function(data){
	 		  if(data == "success"){
	 		 $("body").load("main.jsp");
	 			  
	 		  }
	 		  
	 		 }
	 			
	 	});

 return false;
}
	
$(function(){
	 //第一个 参数 时 总记录数  pager.totalRecord  
	$("#News-Pagination").pagination(${pager.totalRecord },{
        items_per_page:${pager.pageSize}, // 每页显示多少条记录
        current_page:${pager.currentPage} - 1, // 当前显示第几页数据
        num_display_entries:3, // 分页显示的条目数
        next_text:"下一页",
        prev_text:"上一页",
        load_first_page:false,
        num_edge_entries:2, // 连接分页主体，显示的条目数
        callback:handlePaginationClick
	});
 })
</script>
<body>	
	
	<table>
		<tr>
			<th>全选<input type="checkbox" name="checkAll">
			<th>商品编号</th>
			<th>商品名称</th>
			<th>商品价钱</th>
			<th>商品描述</th>
			<th>操作</th>
		</tr>
		<c:forEach items="${pager.list }" var="product">
			<tr>
				<th><input type="checkbox" name="checkOne">
				<th>${product.id }</th>
				<th>${product.pname }</th>
				<th>${product.price }</th>
				<th>${product.remark }</th>
			</tr>
		</c:forEach>
	</table>
	<div id="News-Pagination"></div>	
</body>
</html>
4./PagerDemo/WebContent/top.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%

     String path = request.getContextPath();
     String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>
5.ajax
ajax :页面的 局部刷新 异步请求


原生的 js写法

基于 jquery的 ajax 写法

form ,a , button 都可以用 ajax 来完成 对后台对的请求

<form action="userServlet">

 <input type="button" value="登录">
 <input type="submit value="登录">
</form>

选择了 ajax 提交 不用 自动提交

a
button

================================
 前提 是 你已经 导入了 jquery-3.4.1.min.js  文件

 $(function(){

 	$("").click(function(){


$.ajax({
 	  data:传输到后台的数据,
 	  type:"请求方式    get / post",
 	  url:"目标地址",
 	  success:function(){
 	   //回调函数
 	  },
 	  error:function(){
 	  
 	  }
 	});
 	
 	$.post();
 	
 	$.get();
 	
 	$.getJSON(); 只可以接收 json格式
 	
 	$.load("就使来发送请求 和  加载页面");






}）
 	

 	
 })
 
 
 //必须触发  或 调用
 function nextPage(){

   $.ajax({
 	  data:传输到后台的数据,
 	  type:"请求方式    get / post",
 	  url:"目标地址",
 	  success:function(){
 	   //回调函数
 	  },
 	  error:function(){
 	  
 	  }
 	});
 	
 	$.post();
 	
 	$.get();
 	
 	$.getJSON(); 只可以接收 json格式
 	
 	$.load("就使来发送请求 和  加载页面");

 
 }

===============
	$.post("productServlet?flag=pageForm&pageNum="+(new_page_index+1),function(data){
		 $.load("main.jsp");
	});
  
 
  $.ajax({
 	  data: {pageNum:new_page_index+1&flag'pageForm'},
 	  type: "POST",
 	  url: "productServlet",
 	  success: function(data){
 		 alert(data);
 			$.load("main.jsp");
 	  }
 	});
 
 
  $.load("productServlet?flag=pageForm&pageNum="+(new_page_index+1),function(){
	    $.load("main.jsp");
	 });

方法一
1)function handlePaginationClick(new_page_index,pagination_container){
	
  $.get("productServlet",{pageNum: new_page_index+1, flag: "pageForm"},function(data){
	  $("body").load("main.jsp");
  });

  return false;
}
2)function handlePaginationClick(new_page_index,pagination_container){
    $.get("productServlet?flag=pageForm&pageNum="+(new_page_index+1),function(data){
		 $("body").load("main.jsp");
	});

   return false;
}
方法二
1)function handlePaginationClick(new_page_index,pagination_container){
	
  $.post("productServlet",{pageNum: new_page_index+1, flag: "pageForm"},function(data){
	  $("body").load("main.jsp");
  });

  return false;
}
2)function handlePaginationClick(new_page_index,pagination_container){
    $.post("productServlet?flag=pageForm&pageNum="+(new_page_index+1),function(data){
		 $("body").load("main.jsp");
	});

   return false;
}
方法三
1)function handlePaginationClick(new_page_index,pagination_container){
	
	 $.ajax({
	 	  data: {pageNum: new_page_index+1, flag: "pageForm"},
	 	  type: "POST",
	 	  url: "productServlet",
	 	  success: function(data){
	 		 $("body").load("main.jsp");
	 		 }
	 			
	 	});

  return false;
}
2)function handlePaginationClick(new_page_index,pagination_container){
	
	 $.ajax({
	 	  data: {pageNum: new_page_index+1, flag: "pageForm"},
	 	  type: "GET",
	 	  url: "productServlet",
	 	  success: function(data){
	 		 $("body").load("main.jsp");
	 		 }
	 			
	 	});

 return false;
}

3)function handlePaginationClick(new_page_index,pagination_container){
	
	 $("#main").load("productServlet",{pageNum: new_page_index+1, flag: "pageForm"},function(){
		 $("body").load("main.jsp");
		 });
	 

  return false;
}