第二项目AIaisell（易销宝）

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;
}