一.什么是报表

向上级报告情况的表格。简单的说：报表就是用表格、图表等格式来动态显示数据，可以用公式表示为：“报表 = 多样的格式 + 动态的数据”

• 表格：详细数据
• 图表: 直观

二.表格数据展示

2.1 准备了一 vo

报表中需的数据(准备的类)

public class PurchasebillitemVO {//编号 private Long id; //供应商 private String supplierName; //采购员 private String buyerName; //产品 private String productName; //产品类型 private String productTypeName; //日期 private Date vdate; //数量 private BigDecimal num; //单价 private BigDecimal price; //小计 private BigDecimal amount; //状态 private Integer status; //分组字段 private String groupField; public PurchasebillitemVO() {} //创建时设置值 public PurchasebillitemVO(Purchasebillitem item,Integer groupBy) { this.id = item.getId(); this.supplierName = item.getBill().getSupplier().getName(); this.buyerName = item.getBill().getBuyer().getUsername(); this.productName = item.getProduct().getName(); this.productTypeName = item.getProduct().getTypes().getName(); this.vdate = item.getBill().getVdate(); this.num = item.getNum(); this.price = item.getPrice(); this.amount = item.getAmount(); this.status = item.getBill().getStatus(); //确定分组字段 switch (groupBy){ case 1:{ this.groupField = this.buyerName; break; } case 2:{ this.groupField = (DateUtils.toCalendar(this.vdate).get(Calendar.MONTH)+1) +"月份"; break; } default: this.groupField =this.supplierName; } } ... } 

2.2 前端展示

easyui的一个扩展控制:groupview

2.2.1 引入相应的js支持

<script src="/easyui/plugins/datagrid-groupview.js"></script>

2.2.2 高级查询字段

<div id="tb" style="padding:5px;height:auto"> <!-- 这里就是一个日历 --> <div id="cc" class="easyui-calendar"></div> <form id="searchForm" method="post" action=""> 采购时间: <input name="beginDate" class="easyui-datebox" data-options="sharedCalendar:'#cc'" style="width:120px"> - <input name="endDate" class="easyui-datebox" data-options="sharedCalendar:'#cc'" style="width:120px"> 状态:<select class="easyui-combobox" panelHeight="auto" name="status" style="width: 100px"> <option value="">--请选择--</option> <option value="0">未审</option> <option value="1">已审</option> <option value="-1">作废</option> </select> <!-- 分组的条件 --> <select class="easyui-combobox" panelHeight="auto" name="groupBy" style="width: 100px"> <option value="0">供应商</option> <option value="1">采购员</option> <option value="2">月份</option> </select> <a href="javascript:;" data-method="search" class="easyui-linkbutton" iconCls="icon-search">查询</a> <a href="javascript:;" data-method="show3d" class="easyui-linkbutton" iconCls="icon-search">3D</a> <a href="javascript:;" data-method="show2d" class="easyui-linkbutton" iconCls="icon-search">2D</a> </form> </div> <table id="itemsGrid"></table> 

2.2.3 案例进行修改

//创建分组grid
itemsGrid.datagrid({//title:'',// width:500,// height:250,  fit:true,  rownumbers:true,  remoteSort:false,  nowrap:false,  fitColumns:true, //url:'datagrid_data.json',  toolbar:"#tb",  url:'/purchasebillitem/findItems',  columns:[[ {field:'id',title:'编号',width:100,sortable:true}, {field:'supplierName',title:'供应商',width:100,sortable:true}, {field:'buyerName',title:'采购员',width:100,sortable:true}, {field:'productName',title:'产品',width:100,sortable:true}, {field:'productTypeName',title:'产品类型',width:100,sortable:true}, {field:'vdate',title:'采购日期',width:100,sortable:true}, {field:'num',title:'数量',width:100,sortable:true}, {field:'price',title:'价格',width:100,sortable:true}, {field:'amount',title:'小计',width:100,sortable:true}, {field:'status',title:'状态',width:100,sortable:true,formatter:statusFormat} ]],  groupField:'groupField', //指示要被分组的字段  view: groupview,  groupFormatter:function(value, rows){ //组格式化 let num = 0,amount = 0; for(let r of rows){ num += r.num; amount += r.amount; } return value + ' - ' + rows.length + '条数据 <span >共'+num+'条数据</span> <span >总金额:'+amount +"</span>"; } }); 

三.图表展示

• 两种技术:flash(actionscript),h5(画布)
• flash缺点:不安全,容易崩溃
• IE的话只能是flash的方式
• 两个框架:highchart(收费,支持IE),echart(百度,开源免费)

3.1 前端使用

3.1.1 引入相应的js

<!-- 引入highcharts的js支持 -->
<script src="/js/plugin/highcharts/code/highcharts.js"></script> <script src="/js/plugin/highcharts/code/highcharts-3d.js"></script> <script src="/js/plugin/highcharts/code/modules/exporting.js"></script> <script src="/js/plugin/highcharts/code/modules/export-data.js"></script> 

3.1.2 弹出div进行展示

1. 准备弹出来的

<!-- 一个弹出框,里面要装一个form表单 -->
<div id="chartDialog" class="easyui-dialog" title="图表展示" data-options="height:400,width:600,closed:true,modal:true"> <div id="container" style="height: 320px"></div> </div> 

1. 点击3D按钮弹出图表

show3d(){chartDialog.dialog("center").dialog("open");//拿到表单中的所有数据var params = searchForm.serializeObject(); //通过Ajax到后台拿到相应的值[{name:xxx,y:10},] $.post("/purchasebillitem/findCharts",params,function (data) { //注意这里有一个异步问题 var chart = Highcharts.chart('container', {  chart: {  type: 'pie', //饼图  options3d: {  enabled: true,  alpha: 45,  beta: 0 } },  title: {  text: '我是一个头' },  tooltip: {  pointFormat: '{series.name}: <b>{point.percentage:.1f}%</b>' },  plotOptions: {  pie: {  allowPointSelect: true,  cursor: 'pointer',  depth: 35,  dataLabels: {  enabled: true,  format: '{point.name}' } } },  series: [{  type: 'pie',  name: '浏览器有',  data: data }] }); }) } 

3.2 后台获取参数

1.修改query中的方法

// where o.bill.status = ? and o.xxx =? ...
//接收参数的变量
private List params = new ArrayList(); //准备一个方法，返回JPQL的查询条件 public String createWhereJPQL(){ StringBuilder jpql = new StringBuilder(); //开始时间 if(beginDate!=null){ jpql.append(" and o.bill.vdate >= ? "); params.add(beginDate); } //结束时间 if(endDate!=null){ jpql.append(" and o.bill.vdate < ? "); params.add(DateUtils.addDays(endDate, 1)); } //状态 if(status!=null){ jpql.append(" and o.bill.status = ? "); params.add(status); } //第一个条件必需是where开头 return jpql.toString().replaceFirst("and", "where"); } //创建分组的JPQL public String createGroupBy(){ String groupStr = "o.bill.supplier.name"; switch (groupBy){ case 1:{ groupStr="o.bill.buyer.username"; break; } case 2:{ groupStr="MONTH(o.bill.vdate)"; break; } } return groupStr; } 

2.PurchasebillitemServiceImpl

/*** 查询图表需要的数据* @param query*/
@Override
public List<Map> findCharts(PurchasebillitemQuery query){ List<Map> mapList = new ArrayList<>(); //拿到条件JPQL String whereJPQL = query.createWhereJPQL(); //拿到条件对应的参数 List params = query.getParams(); //准备分组的条件 String groupBy = query.createGroupBy(); //根据供应商分组拿到的数据 String jpql = "select "+groupBy+",sum(o.amount) from Purchasebillitem o "+whereJPQL+" group by "+groupBy; List<Object[]> list = findByJpql(jpql,params.toArray()); //需要把一个List<Object[]> -> List<Map> for (Object[] objects : list) { Map map = new HashMap(); map.put("name", objects[0]); map.put("y", objects[1]); mapList.add(map); } return mapList; }