爲什麼圖表使用最後的記錄數據？

我有這個ChartField類爲什麼圖表使用最後的記錄數據？

import lombok.AllArgsConstructor; 
import lombok.Getter; 
import lombok.Setter; 

@Getter 
@Setter 
@AllArgsConstructor 
public class ChartField { 

    private int x; 
    private int y; 

}

和MyChart類有特菲爾德

import java.util.List; 

import lombok.Getter; 
import lombok.Setter; 

@Getter 
@Setter 
public class MyChart { 

    private List<ChartField> chartFields; 

}

的名單我這是怎麼生成報告的代碼。

import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 
import java.util.Map; 

import net.sf.jasperreports.engine.JasperFillManager; 
import net.sf.jasperreports.engine.JasperPrint; 
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource; 
import net.sf.jasperreports.view.JasperViewer; 

public class TestReport { 

    public static void main(String[] args) { 

     String source = "reports/test_report.jasper"; 

     try { 

      List<MyChart> listMyCharts = new ArrayList<>(); 
      { 
       MyChart myChart = new MyChart(); 
       List<ChartField> chartFields = new ArrayList<>(); 
       myChart.setChartFields(chartFields); 
       { 
        chartFields.add(new ChartField(2, 3)); 
        chartFields.add(new ChartField(5, 6)); 
        chartFields.add(new ChartField(7, 9)); 
        chartFields.add(new ChartField(11, 12)); 
        chartFields.add(new ChartField(12, 16)); 
        chartFields.add(new ChartField(17, 22)); 
       } 
       listMyCharts.add(myChart); 
      } 
      { 
       MyChart myChart = new MyChart(); 
       List<ChartField> chartFields = new ArrayList<>(); 
       myChart.setChartFields(chartFields); 
       { 
        chartFields.add(new ChartField(5, 4)); 
        chartFields.add(new ChartField(7, 8)); 
        chartFields.add(new ChartField(12, 5)); 
        chartFields.add(new ChartField(15, 18)); 
        chartFields.add(new ChartField(18, 21)); 
        chartFields.add(new ChartField(34, 55)); 
       } 
       listMyCharts.add(myChart); 
      } 

      JRBeanCollectionDataSource dataSource = new JRBeanCollectionDataSource(listMyCharts); 

      Map<String, Object> map = new HashMap<>(); 
      JasperPrint jp = JasperFillManager.fillReport(source, map, dataSource); 
      JasperViewer.viewReport(jp); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 

    } 

}

這是test_report.jrxml 的設計，你可以看到我把表格和圖表，詳細帶。我的期望是細節帶可重複我listMyCharts對象（見TestReport類）表的

的JRDataSource表達

new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{chartFields})

，你可以看到我用同樣的JRDataSource是TABEL使用這個圖表。

這是test_report.jrxml

<?xml version="1.0" encoding="UTF-8"?> 
<!-- Created with Jaspersoft Studio version 6.2.0.final using JasperReports Library version 6.2.0 --> 
<!-- 2016-03-05T12:51:11 --> 
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" 
    name="master_report_template" 
    pageWidth="595" pageHeight="842" columnWidth="555" 
    leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" 
    uuid="a488f074-1b9d-4cc7-95d4-51323412d4b2"> 

    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/> 
    <style name="Table_TH" mode="Opaque" backcolor="#F0F8FF"> 
     <box> 
      <pen lineWidth="0.5" lineColor="#000000"/> 
      <topPen lineWidth="0.5" lineColor="#000000"/> 
      <leftPen lineWidth="0.5" lineColor="#000000"/> 
      <bottomPen lineWidth="0.5" lineColor="#000000"/> 
      <rightPen lineWidth="0.5" lineColor="#000000"/> 
     </box> 
    </style> 
    <style name="Table_CH" mode="Opaque" backcolor="#BFE1FF"> 
     <box> 
      <pen lineWidth="0.5" lineColor="#000000"/> 
      <topPen lineWidth="0.5" lineColor="#000000"/> 
      <leftPen lineWidth="0.5" lineColor="#000000"/> 
      <bottomPen lineWidth="0.5" lineColor="#000000"/> 
      <rightPen lineWidth="0.5" lineColor="#000000"/> 
     </box> 
    </style> 
    <style name="Table_TD" mode="Opaque" backcolor="#FFFFFF"> 
     <box> 
      <pen lineWidth="0.5" lineColor="#000000"/> 
      <topPen lineWidth="0.5" lineColor="#000000"/> 
      <leftPen lineWidth="0.5" lineColor="#000000"/> 
      <bottomPen lineWidth="0.5" lineColor="#000000"/> 
      <rightPen lineWidth="0.5" lineColor="#000000"/> 
     </box> 
    </style> 
    <subDataset name="Dataset1" uuid="8c5a7d5e-8685-4dae-b33b-b816e12907c4"> 
     <queryString> 
      <![CDATA[]]> 
     </queryString> 
     <field name="x" class="java.lang.Integer"/> 
     <field name="y" class="java.lang.Integer"/> 
    </subDataset> 
    <queryString> 
     <![CDATA[]]> 
    </queryString> 
    <field name="chartFields" class="java.util.List"/> 
    <background> 
     <band splitType="Stretch"/> 
    </background> 
    <detail> 
     <band height="202" splitType="Stretch"> 
      <property name="com.jaspersoft.studio.unit.height" value="pixel"/> 
      <componentElement> 
       <reportElement x="10" y="10" width="220" height="76" uuid="41604712-0359-4058-8a74-30677eb774df"> 
        <property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/> 
       </reportElement> 
       <jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" 
       xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd"> 
        <datasetRun subDataset="Dataset1" uuid="6ad6bedb-dae4-4eb4-9f4e-57a0c04e73d5"> 
         <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{chartFields})]]></dataSourceExpression> 
        </datasetRun> 
        <jr:column width="100" uuid="6a31d692-e928-497f-a168-a31c12620680"> 
         <property name="com.jaspersoft.studio.components.table.model.column.name" value="Column1"/> 
         <jr:columnHeader style="Table_CH" height="30" rowSpan="1"> 
          <staticText> 
           <reportElement x="0" y="0" width="100" height="30" uuid="897b63dd-e6ee-4329-9382-495c9b9a4286"/> 
           <textElement> 
            <font size="14"/> 
           </textElement> 
           <text><![CDATA[x]]></text> 
          </staticText> 
         </jr:columnHeader> 
         <jr:detailCell style="Table_TD" height="30"> 
          <textField> 
           <reportElement x="0" y="0" width="100" height="30" uuid="f6b7583f-e131-4ce4-bc8c-fdc83f4515dc"/> 
           <textElement> 
            <font size="14"/> 
           </textElement> 
           <textFieldExpression><![CDATA[$F{x}]]></textFieldExpression> 
          </textField> 
         </jr:detailCell> 
        </jr:column> 
        <jr:column width="100" uuid="19cfc888-0988-42a7-a729-dd673a6c078d"> 
         <property name="com.jaspersoft.studio.components.table.model.column.name" value="Column2"/> 
         <jr:columnHeader style="Table_CH" height="30" rowSpan="1"> 
          <staticText> 
           <reportElement x="0" y="0" width="100" height="30" uuid="08a3e523-4c8b-4374-ab60-16c3cc577060"/> 
           <textElement> 
            <font size="14"/> 
           </textElement> 
           <text><![CDATA[y]]></text> 
          </staticText> 
         </jr:columnHeader> 
         <jr:detailCell style="Table_TD" height="30"> 
          <textField> 
           <reportElement x="0" y="0" width="100" height="30" uuid="99c2e10d-1cf3-4975-99b9-b1f1f6c55571"/> 
           <textElement> 
            <font size="14"/> 
           </textElement> 
           <textFieldExpression><![CDATA[$F{y}]]></textFieldExpression> 
          </textField> 
         </jr:detailCell> 
        </jr:column> 
       </jr:table> 
      </componentElement> 
      <xyLineChart> 
       <chart evaluationTime="Report"> 
        <reportElement x="260" y="0" width="294" height="200" uuid="19cc8a02-7aa3-4518-96f8-71a636b626cf"/> 
        <chartTitle/> 
        <chartSubtitle/> 
        <chartLegend/> 
       </chart> 
       <xyDataset> 
        <dataset> 
         <datasetRun subDataset="Dataset1" uuid="32ba4e38-1819-47f9-bbd6-4a4381e367a5"> 
          <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{chartFields})]]></dataSourceExpression> 
         </datasetRun> 
        </dataset> 
        <xySeries autoSort="true"> 
         <seriesExpression><![CDATA["SERIES 1"]]></seriesExpression> 
         <xValueExpression><![CDATA[$F{x}]]></xValueExpression> 
         <yValueExpression><![CDATA[$F{y}]]></yValueExpression> 
        </xySeries> 
       </xyDataset> 
       <linePlot> 
        <plot/> 
        <categoryAxisFormat> 
         <axisFormat/> 
        </categoryAxisFormat> 
        <valueAxisFormat> 
         <axisFormat/> 
        </valueAxisFormat> 
       </linePlot> 
      </xyLineChart> 
     </band> 
    </detail> 
</jasperReport>

這是我成功生成報告的結果。你可以看到桌子重複，因爲我想要的。

我的問題是

但是，爲什麼圖表不表後的挫折感，而不是上次使用的數據？

來源

2016-03-05 Mirza

在正在使用evaluationTime="Report"此chart標籤裝置

報告：一個常量，指示表達應該在填充過程結束時進行評估。

在填充過程結束時，$F{chartFields}是最後一個記錄。

解

與evaluationTime="Now"更換它或將其刪除（這是默認值）

現在甲常量，指示表達應該在評價在填充過程的確切時刻當遇到它時。

來源

2016-03-05 17:09:37

非常感謝你，你是我的英雄。如果你在這裏，我會擁抱你.. – Mirza

我寧願擁抱...但謝謝接受... –

爲什麼圖表使用最後的記錄數據？

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