layui实现下拉框三级联动

项目需要用layui的三级联动，自己整理了一下，做个记录

1.表结构设计

CREATE TABLE `dt_area` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '区域主键', `area_name` varchar(16) DEFAULT NULL COMMENT '区域名称', `area_code` varchar(128) DEFAULT NULL COMMENT '区域代码', `area_short` varchar(32) DEFAULT NULL COMMENT '区域简称', `area_is_hot` varchar(1) DEFAULT NULL COMMENT '是否热门(0:否、1:是)', `area_sequence` int(11) DEFAULT NULL COMMENT '区域序列', `area_parent_id` int(11) DEFAULT NULL COMMENT '上级主键', `init_date` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '初始时间', PRIMARY KEY (`id`), KEY `parent_id` (`area_parent_id`) USING HASH ) ENGINE=InnoDB AUTO_INCREMENT=900001 DEFAULT CHARSET=utf8 COMMENT='区域字典';

2.mybatis xml

<select resultMap="BaseResultMap" parameterType="java.lang.Integer" > select <include refid="Base_Column_List" /> from dt_area where area_parent_id = #{id,jdbcType=INTEGER} </select>

根据上级主键查询

3.页面元素

<div> <label>地址</label> <div> <select lay-filter="province" lay-verify="required" lay-search=""> <option value="">请选择或搜索省</option> </select> </div> <div> <select lay-filter="city" lay-verify="required" lay-search=""> <option value="">请选择或搜索市</option> </select> </div> <div> <select lay-filter="area" lay-verify="required" lay-search=""> <option value="">请选择或搜索县/区</option> </select> </div> <div> <input lay-verify="required" placeholder="请输入详细地址：城镇＋乡村＋街道＋门牌号码"></input> </div> </div>

4.js

layui.use(['form','layer','jquery'],function(){ var form = layui.form, layer = parent.layer === undefined ? layui.layer : parent.layer, $ = layui.jquery; var provinceText = ""; var cityText = ""; var areaText = ""; //异步加载下拉框数据 $.post(WEB_ROOT+"dtArea/queryByParentId",{"id":0},function (data) { if(!data.success){ layer.msg(data.msg) }else{ var $html = ""; if(data.data != null) { $.each(data.data, function (index, item) { $html += "<option value='" + item.id + "'>" + item.areaName + "</option>"; }); $("#province").append($html); //append后必须从新渲染 form.render('select'); } } }); //监听省下拉框 form.on('select(province)', function(dataObj){ //移除城市下拉框所有选项 $("#city").empty(); var cityHtml = '<option value="">请选择或搜索市</option>'; $("#city").html(cityHtml); var areaHtml = '<option value="">请选择或搜索县/区</option>'; $("#area").html(areaHtml); provinceText = $("#province").find("option:selected").text(); var value = $("#province").val(); //异步加载下拉框数据 $.post(WEB_ROOT+"dtArea/queryByParentId",{"id":value},function (data) { if(!data.success){ layer.msg(data.msg) }else{ var $html = ""; if(data.data != null) { $.each(data.data, function (index, item) { $html += "<option value='" + item.id + "'>" + item.areaName + "</option>"; }); $("#city").append($html); //append后必须从新渲染 form.render('select'); } } }); }); //监听市下拉框 form.on('select(city)', function(dataObj){ //移除县区下拉框所有选项 $("#area").empty(); var html = '<option value="">请选择或搜索县/区</option>'; $("#area").html(html); cityText = $("#city").find("option:selected").text(); var value = $("#city").val(); //异步加载下拉框数据 $.post(WEB_ROOT+"dtArea/queryByParentId",{"id":value},function (data) { if(!data.success){ layer.msg(data.msg) }else{ var $html = ""; if(data.data != null) { $.each(data.data, function (index, item) { $html += "<option value='" + item.id + "'>" + item.areaName + "</option>"; }); $("#area").append($html); //append后必须从新渲染 form.render('select'); } } }); }); //监听县区下拉框 form.on('select(area)', function(dataObj){ areaText = $("#area").find("option:selected").text(); }); });

5.页面效果 

附上联动sql下载地址