基于layUI调用后台数据实现区域信息级联查询
1.基本思路
- 后台提供根据区域编码查询区域列表公共接口
- 页面初始化调用后台接口加载所有省份
- 点击省份将省份区域编码传入后台查询该省份下所有地市信息，以此类推
2.数据表结构展示
SELECT COLUMN_NAME 列名, DATA_TYPE 字段类型, CHARACTER_MAXIMUM_LENGTH 长度, IS_NULLABLE 是否为空, COLUMN_COMMENT 备注 FROM INFORMATION_SCHEMA. COLUMNS WHERE table_name = 'td_area';
3.数据详解
3.1.查看所有省份数据
select * from td_area t where t.level = 0 and t.parent_code = 0;
3.2.根据省份编码查询地市编码
以北京市为例，级别编码变为1，北京市的区域编码作为查询条件的父级编码，依次类推即可
select * from td_area t where t.level = 1 and t.parent_code = 110000000000;
3.3.脚本文件下载地址
https://download.csdn.net/download/u010427935/11604164
4.后端接口实现
我这里以Java实现的，单表查询就不贴具体代码了，这里只展示具体返回的json格式数据和入参数据
- 入参:就两个参数，级别编码和父级编码
- 响应部分json格式数据及截图
{ "code": 200, "msg": "success", "data": [ { "level": 0, "parentCode": 0, "areaCode": 110000000000, "zipCode": 0, "cityCode": "", "name": "北京市", "shortName": "北京", "mergerName": "北京", "pinyin": "BeiJing", "lng": 116.407526, "lat": 39.90403 }, { "level": 0, "parentCode": 0, "areaCode": 120000000000, "zipCode": 0, "cityCode": "", "name": "天津市", "shortName": "天津", "mergerName": "天津", "pinyin": "TianJin", "lng": 117.200983, "lat": 39.084158 } ] }
5.前端具体代码
5.1.HTML页面,具体js和css修改为自己项目所在路径即可
<!DOCTYPE html> <html> <head> <meta charset="utf-8"/> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/> <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0,user-scalable=no"/> <title>供应商系统</title> <meta name="description" content=""> <meta name="keywords" content=""> <link rel="shortcut icon" type="image/x-icon" href="#" /> <link rel="stylesheet" href="/lib/layui/css/layui.css" /> <script src="/js/jquery-3.2.1.min.js"></script> <script src="/lib/layui/layui.js"></script> <script src="../js/js-web-city.js"></script> </head> <body> <fieldset class="layui-elem-field layui-field-title" style="margin-top: 20px;"> <legend>表单集合演示</legend> </fieldset> <form class="layui-form"> <div class="layui-form-item"> <label class="layui-form-label">联动选择框</label> <div class="layui-input-inline"> <select name="quiz1" lay-filter="province" id="js-select-provice"></select> </div> <div class="layui-input-inline"> <select name="quiz2" lay-filter="city" id="js-select-city"></select> </div> <div class="layui-input-inline"> <select name="quiz3" lay-filter="county" id="js-select-county"></select> </div> <div class="layui-input-inline"> <select name="quiz3" lay-filter="street" id="js-select-street"></select> </div><div class="layui-input-inline"> <select name="quiz3" id="js-select-village"></select> </div> </div> </form> </body> </html>
5.2.完整js调用代码
layui.use(['form'], function(){ var form = layui.form,layer = layui.layer //监听省份选择 form.on('select(province)', function(data){ var selName = data.elem[data.elem.selectedIndex].text; getCity(data.value); form.render('select');//重新渲染下拉框 }); //监听地市选择 form.on('select(city)', function(data){ getCounty(data.value); form.render('select');//重新渲染下拉框 }); //监听区县选择 form.on('select(county)', function(data){ getStreet(data.value); form.render('select');//重新渲染下拉框 }); //监听乡镇选择 form.on('select(street)', function(data){ getVillage(data.value); form.render('select');//重新渲染下拉框 }); //加载地市信息 function getCity(provinceCode) { var areaData = queryArea(1,provinceCode); if(null == areaData) { return; } var resCode = areaData.code; if(resCode == '200') { $('#js-select-city').html(''); $('#js-select-county').html(''); $('#js-select-street').html(''); $('#js-select-village').html(''); var cityHtml = '<option value="" selected>请选择</option>' $.each(areaData.data,function(index,val) { cityHtml += '<option value="'+val.areaCode+'">'+val.name+'</option>'; }) $('#js-select-city').append(cityHtml); } } //加载区县信息 function getCounty(cityCode) { var areaData = queryArea(2,cityCode); if(null == areaData) { return; } var resCode = areaData.code; if(resCode == '200') { $('#js-select-county').html(''); $('#js-select-street').html(''); $('#js-select-village').html(''); var countyHtml = '<option value="" selected>请选择</option>' $.each(areaData.data,function(index,val) { countyHtml += '<option value="'+val.areaCode+'">'+val.name+'</option>'; }) $('#js-select-county').append(countyHtml); } } //加载乡镇信息 function getStreet(countyCode) { var areaData = queryArea(3,countyCode); if(null == areaData) { return; } var resCode = areaData.code; if(resCode == '200') { $('#js-select-street').html(''); $('#js-select-village').html(''); var streetHtml = '<option value="" selected>请选择</option>' $.each(areaData.data,function(index,val) { streetHtml += '<option value="'+val.areaCode+'">'+val.name+'</option>'; }) $('#js-select-street').append(streetHtml); } } //加载街道信息 function getVillage(streetCode) { var areaData = queryArea(4,streetCode); if(null == areaData) { return; } var resCode = areaData.code; if(resCode == '200') { $('#js-select-village').html(''); var villageHtml = '<option value="" selected>请选择</option>' $.each(areaData.data,function(index,val) { villageHtml += '<option value="'+val.areaCode+'">'+val.name+'</option>'; }) $('#js-select-village').append(villageHtml); } } $(function () { getProvince(0,0); //初始化加载省份信息 form.render('select');//重新渲染下拉框 }); }); function getProvince(level,code) { var areaData = queryArea(level,code); if(null == areaData) { return; } var resCode = areaData.code; if(resCode == '200') { var provicetHtml = '<option value="" selected>请选择</option>' $.each(areaData.data,function(index,val) { provicetHtml += '<option value="'+val.areaCode+'">'+val.name+'</option>'; }) $('#js-select-provice').append(provicetHtml); } } /** * ajax查询区域信息，如果要去返回值信息设置为同步，默认为异步调用 * @param level * @param code * @returns {string} */ function queryArea(level,code) { var resData = ''; $.ajax({ url: '../test/queryArea', type: 'POST', dataType: 'JSON', async: false, data: { level: level, parentCode: code }, success: function(res) { resData = res; }, error: function(error) { } }); return resData; }
5.3.js代码简单梳理
- 首选根据级别编码和区域编码查询后台公共方法，这里需要注意ajax异步调用无返回值得，需要设置为同步 async: false,
/** * ajax查询区域信息，如果要去返回值信息设置为同步，默认为异步调用 * @param level * @param code * @returns {string} */ function queryArea(level,code) { var resData = ''; $.ajax({ url: '../test/queryArea', type: 'POST', dataType: 'JSON', async: false, data: { level: level, parentCode: code }, success: function(res) { resData = res; }, error: function(error) { } }); return resData; }
- 页面初始化加载所有省份信息
- 监听选择省份下拉框调用地市信息，选择地市加载区县依次类推即可
6.页面展示效果
