Using ajax to implement paging and paging query methods

I have written an ajax loading page before. It is very simple, and there is no need to refresh the page. It is also very convenient to write. The paging I wrote today does not need to encapsulate the page.class .php,

is simply written by js and ajax

First of all, in order to make the page neat and beautiful, I used bootstrap and needed to import the required file package

<link href="dist/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<script src="../jquery/jquery-1.11.2.min.js"></script>
<script src="dist/js/bootstrap.min.js"></script>

The following is the content displayed on the page

<p><input type="text" id="name" /> <input type="button" value="查询" id="chaxun" /></p><br /><table class="table table-striped">
  <thead>
    <tr>
      <th width="30%">国家代号</th>
      <th width="30%">国家名称</th>
      <th width="40%">父级代号</th>
    </tr>
  </thead>
  <tbody id="tb">
   
  </tbody></table><br /><p><ul class="pagination" id="fenye"></ul></p>

The following is the js part, written with ajax

<script type="text/javascript">

var page = 1; //当前页

//加载数据
Load();
//加载分页信息
LoadFenYe();

//给查询加点击事件
$("#chaxun").click(function(){
        //将当前页重置
        page = 1;
        //加载数据
        Load();
        //加载分页信息
        LoadFenYe();
    })

//加载分页信息的方法
function LoadFenYe()
{
    var s = "";
    var name = $("#name").val();
    
    var minys = 1;
    var maxys = 1;
    $.ajax({
        async:false,
        data:{name:name},
        type:"POST",
        url:"zys.php",
        dataType:"TEXT",
        success: function(data){
                maxys = data;
            }
    });
    //加载上一页
    s += "<li class=&#39;syy&#39;><a>&laquo;</a></li>"; 
    
    //加载分页列表
    for(var i=page-4;i<page+5;i++)
    {
        if(i>=minys && i<=maxys)
        {
            if(i==page)
            {
                s += "<li class=&#39;active list&#39;><a>"+i+"</a></li>";
            }
            else
            {
                s += "<li class=&#39;list&#39;><a>"+i+"</a></li>";
            }
        }
    }
    
    //加载下一页
    s += "<li class=&#39;xyy&#39;><a>&raquo;</a></li>";
    
    //显示分页列表
    $("#fenye").html(s);
    
    //给列表加点击事件
    $(".list").click(function(){
            //改变当前页
            page = $(this).text();
            //加载数据
            Load();
            //加载分页信息
            LoadFenYe();
        })
    //上一页加点击事件
    $(".syy").click(function(){
            //改变当前页
            if(page>1)
            {
                page = parseInt(page)-1;
                //加载数据
                Load();
                //加载分页信息
                LoadFenYe();
            }
        })
    //下一页加点击事件
    $(".xyy").click(function(){
        
            //改变当前页
            if(page<maxys)
            {
                page = parseInt(page)+1;
                //加载数据
                Load();
                //加载分页信息
                LoadFenYe();
            }

        })
}

//加载数据的方法
function Load()
{
    var name = $("#name").val();
    $.ajax({
        url:"jiazai.php",
        data:{page:page,name:name},
        type:"POST",
        dataType:"TEXT",
        success: function(data){
                var str = "";
                var hang = data.split("|");
                for(var i=0;i<hang.length;i++)
                {
                    var lie = hang[i].split("^");
                    str = str+"<tr><td>"+lie[0]+"</td><td>"+lie[1]+"</td><td>"+lie[2]+"</td></tr>";
                }
                $("#tb").html(str);
                                
            }
    });
    
}

The code of jiazai.php page is as follows:

<?php
include("DADB.class.php");
$db=new DADB();
$page=$_POST["page"];
$key=$_POST["name"];
$num=20;
$tiao=($page-1)*$num;
$sql="select * from chinastates WHERE areaname like &#39;%{$key}%&#39; limit {$tiao},{$num}";
echo $db->StrQuery($sql,1);

zys.php code is as follows:

<?php
include("DADB.class.php");
$db=new DADB();
$key=$_POST["name"];
$sql="select count(*) from chinastates where areaname like &#39;%{$key}%&#39;"; //显示总共有多少条内容
$zts=$db->StrQuery($sql);
echo ceil($zts/20);

In this way, the paging and query functions can be fully realized

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