在Excel中使用Apache POI创建条形图 [英] Create Bar Chart in Excel with Apache POI
本文介绍了在Excel中使用Apache POI创建条形图的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我尝试使用Apache POI在XLSX电子表格中创建条形图，但是Excel一直在说，当我尝试打开文件时，内容有问题并且删除了图表。这是我想要做的完整代码：
I'm trying to create a Bar Chart in an XLSX Spreadsheet using Apache POI, but Excel keeps saying that there's a problem with the content and deleting the chart when I try to open the file. Here's the full code of what I'm trying to do:
public static void createBarChart() {
Workbook wb = new XSSFWorkbook();
Sheet sheet = wb.createSheet("Sheet2");
Row row;
Cell cell;
row = sheet.createRow(0);
row.createCell(0);
row.createCell(1).setCellValue("HEADER 1");
row.createCell(2).setCellValue("HEADER 2");
row.createCell(3).setCellValue("HEADER 3");
for (int r = 1; r < 5; r++) {
row = sheet.createRow(r);
cell = row.createCell(0);
cell.setCellValue("Serie " + r);
cell = row.createCell(1);
cell.setCellValue(123);
cell = row.createCell(2);
cell.setCellValue(456);
cell = row.createCell(3);
cell.setCellValue(789);
}
Drawing drawing = sheet.createDrawingPatriarch();
ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 5, 5, 20);
Chart chart = drawing.createChart(anchor);
CTChart ctChart = ((XSSFChart) chart).getCTChart();
ctChart.addNewTitle();
CTPlotArea ctPlotArea = ctChart.getPlotArea();
CTBarChart ctBarChart = ctPlotArea.addNewBarChart();
ctBarChart.addNewBarDir().setVal(STBarDir.COL);
ctBarChart.addNewGrouping().setVal(STBarGrouping.CLUSTERED);
ctBarChart.addNewVaryColors().setVal(false);
// First series
CTBarSer ctBarSer = ctBarChart.addNewSer();
ctBarSer.addNewIdx().setVal(0);
ctBarSer.addNewOrder().setVal(0);
// [01] Title
CTSerTx ctSerTx = ctBarSer.addNewTx();
CTStrRef ctSerTxStrRef = ctSerTx.addNewStrRef();
ctSerTxStrRef.setF("Sheet2!$A$2");
CTStrData strCache = ctSerTxStrRef.addNewStrCache();
strCache.addNewPtCount().setVal(1);
CTStrVal newPt = strCache.addNewPt();
newPt.setV("Serie 1");
newPt.setIdx(0);
// [01] SpPr
CTShapeProperties spPr = ctBarSer.addNewSpPr();
CTSolidColorFillProperties solidFill = spPr.addNewSolidFill();
solidFill.addNewSchemeClr().setVal(STSchemeColorValImpl.ACCENT_1);
spPr.addNewLn().addNewNoFill();
spPr.addNewEffectLst();
// [01] Invert if negative
ctBarSer.addNewInvertIfNegative().setVal(false);
// [01] Series titles
CTAxDataSource newCat = ctBarSer.addNewCat();
CTStrRef addNewStrRef = newCat.addNewStrRef();
addNewStrRef.setF("Sheet2!$B$1:$D$1");
CTStrData addNewStrCache = addNewStrRef.addNewStrCache();
addNewStrCache.addNewPtCount().setVal(3);
CTStrVal pt1 = addNewStrCache.addNewPt();
pt1.setIdx(0);
pt1.setV(sheet.getRow(0).getCell(1).getStringCellValue());
CTStrVal pt2 = addNewStrCache.addNewPt();
pt2.setIdx(1);
pt2.setV(sheet.getRow(0).getCell(2).getStringCellValue());
CTStrVal pt3 = addNewStrCache.addNewPt();
pt3.setIdx(2);
pt3.setV(sheet.getRow(0).getCell(3).getStringCellValue());
// [01] Series values
CTNumDataSource newVal = ctBarSer.addNewVal();
CTNumRef numRef = newVal.addNewNumRef();
numRef.setF("Sheet2!$B$2:$D$2");
CTNumData numCache = numRef.addNewNumCache();
numCache.addNewPtCount().setVal(3);
CTNumVal numpt1 = numCache.addNewPt();
numpt1.setIdx(0);
numpt1.setV(String.valueOf(sheet.getRow(1).getCell(1).getNumericCellValue()));
CTNumVal numpt2 = numCache.addNewPt();
numpt2.setIdx(1);
numpt2.setV(String.valueOf(sheet.getRow(1).getCell(2).getNumericCellValue()));
CTNumVal numpt3 = numCache.addNewPt();
numpt3.setIdx(2);
numpt3.setV(String.valueOf(sheet.getRow(1).getCell(3).getNumericCellValue()));
// dLbls
CTDLbls dLbls = ctBarChart.addNewDLbls();
dLbls.addNewShowBubbleSize().setVal(false);
dLbls.addNewShowLegendKey().setVal(false);
dLbls.addNewShowCatName().setVal(false);
dLbls.addNewShowSerName().setVal(false);
dLbls.addNewShowPercent().setVal(false);
dLbls.addNewShowVal().setVal(false);
FileOutputStream fileOut = new FileOutputStream("barchart.xlsx");
wb.write(fileOut);
wb.close();
fileOut.close();
}
任何人都可以帮助我找到（和解决）问题吗？提前感谢！
Can anyone help me find (and, well, solve) the issue? Thanks in advance!
推荐答案
勉强出生;-)。对于不了解后台背景的用户 Apache POI仅支持ScatterCharts和LineCharts为什么？ 。
Phew, difficult birth ;-). For users without knowledge of the background Apache POI supports only ScatterCharts and LineCharts why?. There is described how to proceed in principle.
正如我所说的。以最简单可能的条形图首先进行测试。这是一个有两个值的序列。然后你会看到你完全忘记了你的代码中的轴。饼图没有轴。这就是为什么他们没有必要。但是一个条形图在没有轴的情况下不起作用。
As I said. Take the simplest possible bar chart for testing first. That is one series with two values. Then you would have seen that you have completely forgotten the axes in your code. A pie chart has no axes. Thats why there they are not necessary. But a bar chart will not work without axes.
相反，你可以无所顾忌地忘记所有被命名为缓存的东西。
Instead you can unscrupulously forget all things what is named "cache".
是否需要其他东西是由try和error决定的。也可以阅读 Office OpenXML推荐。可能缺少所有具有 minOccurs <>0的元素导致在打开工作簿时删除图形。
Whether other things are needed is determined by try and error. Also one could read the Office OpenXML recommendation. Probably the missing of all elements having minOccurs <> "0"` leads to deleting the Drawing while opening the Workbook.
条形图的简单示例：
import java.io.FileOutputStream;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.*;
import org.apache.poi.ss.usermodel.charts.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFChart;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTChart;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTPlotArea;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTBarChart;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTBoolean;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTBarSer;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTAxDataSource;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTNumDataSource;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTNumRef;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTStrRef;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTSerTx;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTCatAx;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTValAx;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTScaling;
import org.openxmlformats.schemas.drawingml.x2006.chart.CTLegend;
import org.openxmlformats.schemas.drawingml.x2006.chart.STAxPos;
import org.openxmlformats.schemas.drawingml.x2006.chart.STBarDir;
import org.openxmlformats.schemas.drawingml.x2006.chart.STOrientation;
import org.openxmlformats.schemas.drawingml.x2006.chart.STLegendPos;
import org.openxmlformats.schemas.drawingml.x2006.chart.STTickLblPos;
public class BarChart {
public static void main(String[] args) throws Exception {
Workbook wb = new XSSFWorkbook();
Sheet sheet = wb.createSheet("Sheet1");
Row row;
Cell cell;
row = sheet.createRow(0);
row.createCell(0);
row.createCell(1).setCellValue("HEADER 1");
row.createCell(2).setCellValue("HEADER 2");
row.createCell(3).setCellValue("HEADER 3");
for (int r = 1; r < 5; r++) {
row = sheet.createRow(r);
cell = row.createCell(0);
cell.setCellValue("Serie " + r);
cell = row.createCell(1);
cell.setCellValue(new java.util.Random().nextDouble());
cell = row.createCell(2);
cell.setCellValue(new java.util.Random().nextDouble());
cell = row.createCell(3);
cell.setCellValue(new java.util.Random().nextDouble());
}
Drawing drawing = sheet.createDrawingPatriarch();
ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 0, 5, 8, 20);
Chart chart = drawing.createChart(anchor);
CTChart ctChart = ((XSSFChart)chart).getCTChart();
CTPlotArea ctPlotArea = ctChart.getPlotArea();
CTBarChart ctBarChart = ctPlotArea.addNewBarChart();
CTBoolean ctBoolean = ctBarChart.addNewVaryColors();
ctBoolean.setVal(true);
ctBarChart.addNewBarDir().setVal(STBarDir.COL);
for (int r = 2; r < 6; r++) {
CTBarSer ctBarSer = ctBarChart.addNewSer();
CTSerTx ctSerTx = ctBarSer.addNewTx();
CTStrRef ctStrRef = ctSerTx.addNewStrRef();
ctStrRef.setF("Sheet1!$A$" + r);
ctBarSer.addNewIdx().setVal(r-2);
CTAxDataSource cttAxDataSource = ctBarSer.addNewCat();
ctStrRef = cttAxDataSource.addNewStrRef();
ctStrRef.setF("Sheet1!$B$1:$D$1");
CTNumDataSource ctNumDataSource = ctBarSer.addNewVal();
CTNumRef ctNumRef = ctNumDataSource.addNewNumRef();
ctNumRef.setF("Sheet1!$B$" + r + ":$D$" + r);
//at least the border lines in Libreoffice Calc ;-)
ctBarSer.addNewSpPr().addNewLn().addNewSolidFill().addNewSrgbClr().setVal(new byte[] {0,0,0});
}
//telling the BarChart that it has axes and giving them Ids
ctBarChart.addNewAxId().setVal(123456);
ctBarChart.addNewAxId().setVal(123457);
//cat axis
CTCatAx ctCatAx = ctPlotArea.addNewCatAx();
ctCatAx.addNewAxId().setVal(123456); //id of the cat axis
CTScaling ctScaling = ctCatAx.addNewScaling();
ctScaling.addNewOrientation().setVal(STOrientation.MIN_MAX);
ctCatAx.addNewDelete().setVal(false);
ctCatAx.addNewAxPos().setVal(STAxPos.B);
ctCatAx.addNewCrossAx().setVal(123457); //id of the val axis
ctCatAx.addNewTickLblPos().setVal(STTickLblPos.NEXT_TO);
//val axis
CTValAx ctValAx = ctPlotArea.addNewValAx();
ctValAx.addNewAxId().setVal(123457); //id of the val axis
ctScaling = ctValAx.addNewScaling();
ctScaling.addNewOrientation().setVal(STOrientation.MIN_MAX);
ctValAx.addNewDelete().setVal(false);
ctValAx.addNewAxPos().setVal(STAxPos.L);
ctValAx.addNewCrossAx().setVal(123456); //id of the cat axis
ctValAx.addNewTickLblPos().setVal(STTickLblPos.NEXT_TO);
//legend
CTLegend ctLegend = ctChart.addNewLegend();
ctLegend.addNewLegendPos().setVal(STLegendPos.B);
ctLegend.addNewOverlay().setVal(false);
System.out.println(ctChart);
FileOutputStream fileOut = new FileOutputStream("BarChart.xlsx");
wb.write(fileOut);
fileOut.close();
}
}
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