使用AJSX分页原理:封装两个方法,一个方法负责显示,一个负责写入分页栏。
首先使用一张数据比较多的数据库中的表格:
主界面加载后首先导入所有数据,并显示前20条数据,在访问数据库时,使用limit显示前20条:
html:
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<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> < html xmlns="http://www.w3.org/1999/xhtml"> < head > < meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> < title >无标题文档</ title > < script src="jquery-1.11.2.min.js"></ script > </ head > < body > < div > < input type="text" id="key" /> < input type="button" value="查询" id="chaxun" /> </ div > < table width="100%" border="1" cellpadding="0" cellspacing="0"> < tr > < td >代号</ td > < td >名称</ td > < td >父级代号</ td > </ tr > < tbody id="nr"> </ tbody > </ table > < div id="xinxi"> </ div > </ body > </ html > |
首先把表头显示出来,要导入jq包。
用AJAX从数据库中用limit20条每页的搜索显示第一页:
js代码:
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<script type= "text/javascript" > var page = 1; //当前页 Load(); //加载数据 function Load() { var key = $( "#key" ).val(); //查询条件 $.ajax({ url: "chuli.php" , data: { page: page, key: key }, type: "POST" , dataType: "JSON" , success: function (data) { var str = "" ; for ( var k in data) { str += "<tr><td>" + data[k].AreaCode + "</td><td>" + data[k].AreaName + "</td><td>" + data[k].ParentAreaCode + "</td></tr>" ; } $( "#nr" ).html(str); } }); } |
chuli.php文件:
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<?php include ( "DBDA.class.php" ); $db = new DBDA(); $page = $_POST [ "page" ]; $key = $_POST [ "key" ]; $num = 20; $tiao = ( $page -1)* $num ; $sql = "select * from chinastates where areaname like '%{$key}%' limit {$tiao},{$num}" ; echo $db ->JSONQuery( $sql ); |
这里引入了一个php的类文件:
此类文件用来返回字符串,数据库搜索结果,或者JSON数据:
DBDA.class.php
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<?php class DBDA { public $host = "localhost" ; public $uid = "root" ; public $pwd = "" ; public $dbname = "12345" ; //成员方法 public function Query( $sql , $type =1) { $db = new MySQLi( $this ->host, $this ->uid, $this ->pwd, $this ->dbname); $r = $db ->query( $sql ); if ( $type ==1) { return $r ->fetch_all(); } else { return $r ; } } //返回字符串的方法 public function StrQuery( $sql , $type =1) { $db = new MySQLi( $this ->host, $this ->uid, $this ->pwd, $this ->dbname); $r = $db ->query( $sql ); if ( $type ==1) { $attr = $r ->fetch_all(); $str = "" ; foreach ( $attr as $v ) { $str .= implode( "^" , $v ). "|" ; } return substr ( $str ,0, strlen ( $str )-1); } else { return $r ; } } //返回JSON function JSONQuery( $sql , $type =1) { $db = new MySQLi( $this ->host, $this ->uid, $this ->pwd, $this ->dbname); $r = $db ->query( $sql ); if ( $type ==1) { return json_encode( $r ->fetch_all(MYSQLI_ASSOC)); } else { return $r ; } } } |
结果:
加载另外的一个分页栏的方法,实现以下效果:
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function LoadXinXi() { //加载分页信息 var str = "" ; var minys = 1; var maxys = 1; var key = $( "#key" ).val(); //查总页数 $.ajax({ async: false , url: "zys.php" , data: { key: key }, type: "POST" , dataType: "TEXT" , success: function (d) { maxys = d; } }); str += "<span>总共:" + maxys + "页</span> " ; str += "<span id='prev'>上一页</span>" ; for ( var i = page - 2; i < page + 3; i++) { if (i >= minys && i <= maxys) { if (i == page) { str += "<span class='dangqian' bs='" + i + "'>" + i + "</span> " ; } else { str += "<span class='list' bs='" + i + "'>" + i + "</span> " ; } } } str += "<span id='next'>下一页</span>" ; $( "#xinxi" ).html(str); //给上一页添加点击事件 $( "#prev" ).click( function () { page = page - 1; if (page < 1) { page = 1; } Load(); //加载数据 LoadXinXi(); //加载分页信息 }) //给下一页加点击事件 $( "#next" ).click( function () { page = page + 1; if (page > maxys) { page = maxys; } Load(); //加载数据 LoadXinXi(); //加载分页信息 }) //给中间的列表加事件 $( ".list" ).click( function () { page = parseInt($( this ).attr( "bs" )); Load(); //加载数据 LoadXinXi(); //加载分页信息 }) } |
php处理文件(zys.php):
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<?php include ( "DBDA.class.php" ); $db = new DBDA(); $key = $_POST [ "key" ]; $num = 20; $sql = "select count(*) from chinastates where areaname like '%{$key}%'" ; $zts = $db ->StrQuery( $sql ); echo ceil ( $zts / $num ); |
主页代码:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > <html xmlns= "http://www.w3.org/1999/xhtml" > <head> <meta http-equiv= "Content-Type" content= "text/html; charset=utf-8" /> <title>无标题文档</title> <script src= "jquery-1.11.2.min.js" ></script> <style type= "text/css" >.dangqian { background-color: #69F }</style> </head> <body> <div> <input type= "text" id= "key" /> <input type= "button" value= "查询" id= "chaxun" /> </div> <table width= "100%" border= "1" cellpadding= "0" cellspacing= "0" > <tr> <td>代号</td> <td>名称</td> <td>父级代号</td> </tr> <tbody id= "nr" > </tbody> </table> <div id= "xinxi" > </div> </body> <script type= "text/javascript" > var page = 1; //当前页 Load(); //加载数据 LoadXinXi(); //加载分页信息 //查询 $( "#chaxun" ).click( function () { page = 1; Load(); //加载数据 LoadXinXi(); //加载分页信息 }) function Load() { var key = $( "#key" ).val(); //查询条件 $.ajax({ url: "chuli.php" , data: { page: page, key: key }, type: "POST" , dataType: "JSON" , success: function (data) { var str = "" ; for ( var k in data) { str += "<tr><td>" + data[k].AreaCode + "</td><td>" + data[k].AreaName + "</td><td>" + data[k].ParentAreaCode + "</td></tr>" ; } $( "#nr" ).html(str); } }); } function LoadXinXi() { var str = "" ; var minys = 1; var maxys = 1; var key = $( "#key" ).val(); //查总页数 $.ajax({ async: false, url: "zys.php" , data: { key: key }, type: "POST" , dataType: "TEXT" , success: function (d) { maxys = d; } }); str += "<span>总共:" + maxys + "页</span> " ; str += "<span id='prev'>上一页</span>" ; for ( var i = page - 2; i < page + 3; i++) { if (i >= minys && i <= maxys) { if (i == page) { str += "<span class='dangqian' bs='" + i + "'>" + i + "</span> " ; } else { str += "<span class='list' bs='" + i + "'>" + i + "</span> " ; } } } str += "<span id='next'>下一页</span>" ; $( "#xinxi" ).html(str); //给上一页添加点击事件 $( "#prev" ).click( function () { page = page - 1; if (page < 1) { page = 1; } Load(); //加载数据 LoadXinXi(); //加载分页信息 }) //给下一页加点击事件 $( "#next" ).click( function () { page = page + 1; if (page > maxys) { page = maxys; } Load(); //加载数据 LoadXinXi(); //加载分页信息 }) //给中间的列表加事件 $( ".list" ).click( function () { page = parseInt($(this).attr( "bs" )); Load(); //加载数据 LoadXinXi(); //加载分页信息 }) }</script> </html> |
实现分页效果: