本文以一个实际例子,使用了extjs的gridpanel中的分组统计显示功能,涉及知识点:

Ext.grid.Panel model/store store中的data grid中的features以及其中ftype: 'groupingsummary'等

一、先看效果图:

/

可以看到图片显示的安装月份进行了分组显示 在每个分组下面会有合计和平均值显示。我这个例子在IE8和谷歌以及火狐浏览器下均正常显示。

二、贴上所有的代码(其实就只有一个jsp页面就足够了)

 

<%@ page contentType=text/html; charset=UTF-8 %>
<%
	String context = request.getContextPath();
%>


<script type=text/javascript> window.context = <%=context%>; </script><script type=text/javascript src=<%=context %>/extjs5/include-ext.js></script><script type=text/javascript src=<%=context %>/extjs5/packages/ext-locale/build/ext-locale-zh_CN.js></script><script type=text/javascript src=<%=context %>/app/ux/Month.js></script><script type=text/javascript > Ext.onReady(function(){ var data = [{ factory:'第一家维修公司', date:'2014-05', cost:52492.0, costav:52492.0 },{ factory:'第二家维修公司', date:'2014-05', cost:760.0, costav:760.0 },{ factory:'第三家维修公司', date:'2014-05', cost:1807.0, costav:1807.0 },{ factory:'第一家维修公司', date:'2014-06', cost:4921.0, costav:4921.0 },{ factory:'第二家维修公司', date:'2014-06', cost:1020.0, costav:1020.0 },{ factory:'第三家维修公司', date:'2014-06', cost:1637.0, costav:1637.0 },{ factory:'第一家维修公司', date:'2014-07', cost:48150.0, costav:48150.0 },{ factory:'第二家维修公司', date:'2014-07', cost:7940.0, costav:7940.0}]; var store = Ext.create('Ext.data.Store', { fields: [{name: 'date'}, {name: 'cost'},{name: 'costav'},{name: 'factory'}], groupField: 'date', data: data }); var grid = Ext.create('Ext.grid.Panel', { frame: true, height: 800, columnLines: true, // 加上表格线 features: [{ id: 'group', ftype: 'groupingsummary', groupHeaderTpl: '{name}'+'月份车辆美容及维修费用', hideGroupedHeader: false, enableGroupingMenu: false }, { ftype: 'summary', summaryType: 'average', dock: 'bottom' }], renderTo: Ext.getBody(), columns: [{ text: '维修时间', dataIndex: 'date',width:100, summaryRenderer: function(value, summaryData, dataIndex) { return '合计'} },{ text: '维修费用(元)', dataIndex: 'cost', width:180, field: { xtype: 'numberfield'}, summaryType: 'sum', renderer: function(value, metaData, record, rowIdx, colIdx, store, view){ return value + ' 元'}, summaryRenderer: function(value, summaryData, dataIndex) { return value + ' 元'} },{ text: '维修厂家', dataIndex: 'factory',width:120, summaryRenderer: function(value, summaryData, dataIndex) { return '平均值'} },{ text: '', dataIndex: 'costav', width:180, field: {xtype: 'numberfield'}, summaryType: 'average', renderer: function(value, metaData, record, rowIdx, colIdx, store, view){ return ''},//这列最后显示平均值 暂时这样转换显示 summaryRenderer: function(value, summaryData, dataIndex) { return value + ' 元'} }], store: store }); grid.show(); }); </script>这个随便起名一个jsp就可以啦。

 

里面使用了一个日期选择控件,只可以选择年月的。顺便也贴一下代码吧

 

/** Months picker 
      重写 field.Date 
**/  
Ext.define('app.ux.Month', {  
   extend:'Ext.form.field.Date',  
   alias: 'widget.monthfield',  
   requires: ['Ext.picker.Month'],  
   alternateClassName: ['Ext.form.MonthField', 'Ext.form.Month'],  
   selectMonth: null,  
   createPicker: function() {  
       var me = this,  
           format = Ext.String.format;  
       return Ext.create('Ext.picker.Month', {  
           pickerField: me,  
           ownerCt: me.ownerCt,  
           renderTo: document.body,  
           floating: true,  
           hidden: true,  
           focusOnShow: true,  
           minDate: me.minValue,  
           maxDate: me.maxValue,  
           disabledDatesRE: me.disabledDatesRE,  
           disabledDatesText: me.disabledDatesText,  
           disabledDays: me.disabledDays,  
           disabledDaysText: me.disabledDaysText,  
           format: me.format,  
           showToday: me.showToday,  
           startDay: me.startDay,  
           minText: format(me.minText, me.formatDate(me.minValue)),  
           maxText: format(me.maxText, me.formatDate(me.maxValue)),  
           listeners: {   
       select:        { scope: me,   fn: me.onSelect     },   
       monthdblclick: { scope: me,   fn: me.onOKClick     },      
       yeardblclick:  { scope: me,   fn: me.onOKClick     },  
       OkClick:       { scope: me,   fn: me.onOKClick     },      
       CancelClick:   { scope: me,   fn: me.onCancelClick }          
           },  
           keyNavConfig: {  
               esc: function() {  
                   me.collapse();  
               }  
           }  
       });  
   },  
   onCancelClick: function() {  
       var me = this;      
   me.selectMonth = null;  
       me.collapse();  
   },  
   onOKClick: function() {  
       var me = this;      
   if( me.selectMonth ) {  
              me.setValue(me.selectMonth);  
           me.fireEvent('select', me, me.selectMonth);  
   }  
       me.collapse();  
   },  
   onSelect: function(m, d) {  
       var me = this;      
   me.selectMonth = new Date(( d[0]+1 ) +'/1/'+d[1]);  
   }  
});   
/** Months picker **/  

知识点梳理:

 

①。显示的数据,这里整理好了一些数据,在实际中,我们可以通过查询获取,分组查询便可。

 

	   var data = [{
		             factory:'第一家维修公司', date:'2014-05', cost:52492.0, costav:52492.0
			      },{
					 factory:'第二家维修公司', date:'2014-05', cost:760.0, costav:760.0
				  },{
					 factory:'第三家维修公司', date:'2014-05', cost:1807.0, costav:1807.0
				  },{
					 factory:'第一家维修公司', date:'2014-06', cost:4921.0, costav:4921.0
				  },{
					 factory:'第二家维修公司', date:'2014-06', cost:1020.0, costav:1020.0
				  },{
					 factory:'第三家维修公司', date:'2014-06', cost:1637.0, costav:1637.0
				  },{
					 factory:'第一家维修公司', date:'2014-07', cost:48150.0, costav:48150.0
				  },{
					 factory:'第二家维修公司', date:'2014-07', cost:7940.0, costav:7940.0}];

②store数据交互

 

 

	   var store = Ext.create('Ext.data.Store', {
				   fields: [{name: 'date'}, {name: 'cost'},{name: 'costav'},{name: 'factory'}],
                   groupField: 'date',
				   data: data
	   });

这里只需要指定一个groupField就可以了,只需要这一步。

 

 

③。grid主体

 

	   var grid = Ext.create('Ext.grid.Panel', { 
			frame: true,
			height: 800,
			columnLines: true, // 加上表格线  
			features: [{
				id: 'group',
				ftype: 'groupingsummary',
				groupHeaderTpl: '{name}'+'月份车辆美容及维修费用',
				hideGroupedHeader: false,
				enableGroupingMenu: false
			}, {
				ftype: 'summary',
				summaryType: 'average',
				dock: 'bottom'
			}],
		   renderTo: Ext.getBody(),
           columns: [{ 
			             text: '维修时间', dataIndex: 'date',width:100, 
					        summaryRenderer: function(value, summaryData, dataIndex) {
						      return '合计'}
			        },{ 
					     text: '维修费用(元)', dataIndex: 'cost', width:180,
				         field: { xtype: 'numberfield'},
				         summaryType: 'sum',
                         renderer: function(value, metaData, record, rowIdx, colIdx, store, view){
                              return value + ' 元'},
					     summaryRenderer: function(value, summaryData, dataIndex) {
                              return value + ' 元'}
			        },{
					     text: '维修厂家', dataIndex: 'factory',width:120,
				         summaryRenderer: function(value, summaryData, dataIndex) {
						      return '平均值'}
			        },{ 
						 text: '', dataIndex: 'costav', width:180,
				         field: {xtype: 'numberfield'},
				         summaryType: 'average',
                         renderer: function(value, metaData, record, rowIdx, colIdx, store, view){
                              return ''},//这列最后显示平均值 暂时这样转换显示
					     summaryRenderer: function(value, summaryData, dataIndex) {
                              return value + ' 元'}
			        }],
		store: store
	    });

这里需要注意,1.需要给grid指定高度,如果不指定IE8下数据不显示,应该是个bug吧。

 

2.分组以及统计的关键

			features: [{
				id: 'group',
				ftype: 'groupingsummary',//分组统计,可以选择不分组的,各类型可以去API查找
				groupHeaderTpl: '{name}'+'月份车辆美容及维修费用',//标题而已
				hideGroupedHeader: false,
				enableGroupingMenu: false
			}, {
				ftype: 'summary',//下方的汇总的
				summaryType: 'average',//类型是求平均值,还有sum等,可以去API查找
				dock: 'bottom'
			}],
OK

 

就这样设置,就可以简单的实现一个分组报表统计了,有求平均值求和等方法。简单易用