Dynamic cascading loading of ui drop-down box in easy-JS Tutorial-php.cn

This article mainly introduces the sample code of dynamic cascade loading of easyui drop-down box. The editor thinks it is quite good. Now I will share it with you and give it as a reference. Let's follow the editor to take a look.

easyui's drop-down box dynamically loads data. In colleges and universities, all colleges must be queried first, and then courses are dynamically loaded according to the college. Let’s see how to achieve this.

1.Interface effect

##2. html js code

学院名称：  课程名称：

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$(function() { // 下拉框选择控件，下拉框的内容是动态查询数据库信息 $('#collegeName').combobox({ url:'${pageContext.request.contextPath}/loadInstitution', editable:false, //不可编辑状态 cache: false, panelHeight: '150', valueField:'id', textField:'institutionName', onHidePanel: function(){ $("#courseName").combobox("setValue",'');//清空课程 var id = $('#collegeName').combobox('getValue'); //alert(id); $.ajax({ type: "POST", url: '${pageContext.request.contextPath}/loadCourse?id=' + id, cache: false, dataType : "json", success: function(data){ $("#courseName").combobox("loadData",data); } }); } }); $('#courseName').combobox({ //url:'itemManage!categorytbl', editable:false, //不可编辑状态 cache: false, panelHeight: '150',//自动高度适合 valueField:'id', textField:'courseName' }); });

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3.Backend code

@RequestMapping("/loadInstitution") /** * 加载学院 * @param * @param * @return void * @exception/throws [违例类型] [违例说明] * @see [类、类#方法、类#成员] * @deprecated */ public void loadInstitute(HttpServletRequest request, HttpServletResponse response) throws Exception { try { JackJsonUtils JackJsonUtils = new JackJsonUtils(); List institutionList = institutionBean .queryAllColleage(); System.out.println("学院list大小=====" + institutionList.size()); String result = JackJsonUtils.BeanToJson(institutionList); System.out.println(result); JsonUtils.outJson(response, result); } catch (Exception e) { logger.error("加载学院失败", e); } } @RequestMapping("/loadCourse") /** * 动态加载课程 * * * @param * @param * @return void * @exception/throws [违例类型] [违例说明] * @see [类、类#方法、类#成员] * @deprecated */ public void loadCourse(HttpServletRequest request, HttpServletResponse response) throws Exception { JackJsonUtils JackJsonUtils = new JackJsonUtils(); String id = request.getParameter("id"); System.out.println("学院id====" + id); try { if(id != null && id != ""){ List listCourseInfoList = courseBean .queryAllCourseInfos(id); System.out.println("课程list大小=====" + listCourseInfoList.size()); String result = JackJsonUtils.BeanToJson(listCourseInfoList); System.out.println(result); JsonUtils.outJson(response, result); } } catch (Exception e) { logger.error("加载课程失败", e); } }

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According to the basics The provided interface queries colleges and courses, converts them into json format and binds them to the front-end control.

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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