更改折线图Apache POI的颜色 [英] Change colors of line chart Apache POI
本文介绍了更改折线图Apache POI的颜色的处理方法，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
我已经使用Apache POI生成了折线图.我需要更改图表中的默认颜色.我可以使用RGB代码为每行定义特定的颜色吗?
I've generated a line chart using Apache POI. I need to change the default colors I got in the chart. Can I use RGB codes to define specific colors to each line?
我的代码如下.
Drawing drawing = sheet4.createDrawingPatriarch();
ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 1, 1, 17, 22);
Chart chart = drawing.createChart(anchor);
ChartLegend legend = chart.getOrCreateLegend();
legend.setPosition(LegendPosition.RIGHT);
LineChartData data = chart.getChartDataFactory().createLineChartData();
ChartAxis bottomAxis = chart.getChartAxisFactory().createCategoryAxis(AxisPosition.BOTTOM);
ValueAxis leftAxis = chart.getChartAxisFactory().createValueAxis(AxisPosition.LEFT);
leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
ChartDataSource<Number> xs = DataSources.fromNumericCellRange(sheet1, new CellRangeAddress(1, 380, 0, 0));
ChartDataSource<Number> ys1 = DataSources.fromNumericCellRange(sheet1, new CellRangeAddress(1, 380, 1, 1));
ChartDataSource<Number> ys2 = DataSources.fromNumericCellRange(sheet1, new CellRangeAddress(1, 380, 3, 3));
ChartDataSource<Number> ys3 = DataSources.fromNumericCellRange(sheet1, new CellRangeAddress(1, 380, 4, 4));
ChartDataSource<Number> ys4 = DataSources.fromNumericCellRange(sheet1, new CellRangeAddress(1, 380, 8, 8));
LineChartSeries series1 = data.addSeries(xs, ys1);
series1.setTitle("Value 1");
LineChartSeries series2 = data.addSeries(xs, ys2);
series2.setTitle("Value 2");
LineChartSeries series3 = data.addSeries(xs, ys3);
series3.setTitle("Value 3");
LineChartSeries series4 = data.addSeries(xs, ys4);
series4.setTitle("Value 4");
chart.plot(data, bottomAxis, leftAxis);
XSSFChart xssfChart = (XSSFChart) chart;
CTPlotArea plotArea = xssfChart.getCTChart().getPlotArea();
plotArea.getLineChartArray()[0].getSmooth();
CTBoolean ctBool = CTBoolean.Factory.newInstance();
ctBool.setVal(false);
plotArea.getLineChartArray()[0].setSmooth(ctBool);
for (CTLineSer ser : plotArea.getLineChartArray()[0].getSerArray()) {
ser.setSmooth(ctBool);
}
推荐答案
我一直是完整示例的朋友.然后其他人可以重现此图像，而不必猜测Excel工作表的外观.
I am always a friend of complete examples. Then others can reproducing this and don't need guess how the Excel sheet might look like.
下面的完整示例确实以Office Open XML格式(*.xlsx)创建了一个新的Excel工作簿，该工作簿包含一个包含一些示例数据和折线图的工作表.
The following complete example does creating a new Excel workbook in Office Open XML format (*.xlsx) having a sheet containing some example data and the line chart.
第一个代码部分创建折线图，apache poi版本3.17如何默认创建它.
First code part creates a line chart how apache poi version 3.17 creates it per default.
然后在第二部分代码中，我对图表进行了自定义.对代码部分进行注释，以显示其功能.之后，自定义图表也与OpenOffice/Libreoffice Calc兼容. apache poi默认图表与OpenOffice/Libreoffice Calc不兼容.至少为版本3.17.
Then in second code part, I do customizing the chart. The code parts are commented to show what they shall do. After that customizing the chart also is OpenOffice / Libreoffice Calc compatible. The apache poi default charts are not OpenOffice / Libreoffice Calc compatible. At least up to version 3.17.
要进行自定义，需要有关内部低级对象的知识，apache poi用作基本对象.这些包含在 ooxml-schemas-1.3.jar .不幸的是，没有更多的API文档公开可用.因此，必须先下载ooxml-schemas-1.3-sources.jar，然后自己执行javadoc以获得文档.
For customizing one needs knowledge about the internal low level objects apache poi uses as basic objects. Those are contained in ooxml-schemas-1.3.jar . Unfortunately there is not more a API doc public available. So one must download ooxml-schemas-1.3-sources.jar and then do javadoc one's own to get a documentation.
还应该知道Office Open XML格式(*.xlsx)的文件只是ZIP存档.因此，人们可以将其解压缩并查看/xl/charts/chart1.xml.在apache poi创建图表之后，在Excel中进行了所需的更改后，将XML与重新保存后的XML进行比较时，就会看到所需的XML更改.
Also one should know that files in Office Open XML format (*.xlsx) simply are ZIP archives. So one can unzip them and have a look at /xl/charts/chart1.xml. When one does this after apache poi has created the chart and do comparing that XML with the XML after re-saving after done the wanted changings in Excel, then one will see the needed XML changings.
示例:
import java.io.FileOutputStream;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.usermodel.charts.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.util.Units;
public class CreateExcelLineChartAndCustomize {
public static void main(String[] args) throws Exception {
Workbook wb = new XSSFWorkbook();
Sheet sheet = wb.createSheet("linechart");
final int NUM_OF_ROWS = 100;
final int NUM_OF_COLUMNS = 5;
// create some data
Row row;
Cell cell;
String[] headings = new String []{"x", "sin(x)", "cos(x)", "random", "random/x"};
for (int rowIndex = 0; rowIndex < 1; rowIndex++) {
row = sheet.createRow(rowIndex);
for (int colIndex = 0; colIndex < NUM_OF_COLUMNS; colIndex++) {
cell = row.createCell(colIndex);
cell.setCellValue(headings[colIndex]);
}
}
for (int rowIndex = 1; rowIndex < NUM_OF_ROWS; rowIndex++) {
row = sheet.createRow(rowIndex);
for (int colIndex = 0; colIndex < NUM_OF_COLUMNS; colIndex++) {
cell = row.createCell(colIndex);
switch (colIndex) {
case 0:
cell.setCellValue(rowIndex/10d);
break;
case 1:
cell.setCellFormula("SIN(A" + (rowIndex+1) + ")");
break;
case 2:
cell.setCellFormula("COS(A" + (rowIndex+1) + ")");
break;
case 3:
cell.setCellFormula("RAND()");
break;
case 4:
cell.setCellFormula("-D"+(rowIndex+1));
break;
default:
}
}
}
// create default chart
Drawing<?> drawing = sheet.createDrawingPatriarch();
ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 6, 1, 15, 21);
Chart chart = drawing.createChart(anchor);
ChartLegend legend = chart.getOrCreateLegend();
legend.setPosition(LegendPosition.RIGHT);
if (chart instanceof XSSFChart) ((XSSFChart)chart).setTitleText("Some lines");
LineChartData data = chart.getChartDataFactory().createLineChartData();
ChartAxis bottomAxis = chart.getChartAxisFactory().createCategoryAxis(AxisPosition.BOTTOM);
ValueAxis leftAxis = chart.getChartAxisFactory().createValueAxis(AxisPosition.LEFT);
leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
ChartDataSource<Number> xs = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, 99, 0, 0));
ChartDataSource<Number> ys1 = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, 99, 1, 1));
ChartDataSource<Number> ys2 = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, 99, 2, 2));
ChartDataSource<Number> ys3 = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, 99, 3, 3));
ChartDataSource<Number> ys4 = DataSources.fromNumericCellRange(sheet, new CellRangeAddress(1, 99, 4, 4));
LineChartSeries series1 = data.addSeries(xs, ys1);
series1.setTitle("Value 1");
LineChartSeries series2 = data.addSeries(xs, ys2);
series2.setTitle("Value 2");
LineChartSeries series3 = data.addSeries(xs, ys3);
series3.setTitle("Value 3");
LineChartSeries series4 = data.addSeries(xs, ys4);
series4.setTitle("Value 4");
chart.plot(data, bottomAxis, leftAxis);
// customize the chart, this also makes it OpenOffice/Libreoffice Calc compatible
if (chart instanceof XSSFChart) {
XSSFChart xssfChart = (XSSFChart)chart;
// do not auto delete the title
if (xssfChart.getCTChart().getAutoTitleDeleted() == null) xssfChart.getCTChart().addNewAutoTitleDeleted();
xssfChart.getCTChart().getAutoTitleDeleted().setVal(false);
// plot area background and border line
if (xssfChart.getCTChartSpace().getSpPr() == null) xssfChart.getCTChartSpace().addNewSpPr();
if (xssfChart.getCTChartSpace().getSpPr().getSolidFill() == null)
xssfChart.getCTChartSpace().getSpPr().addNewSolidFill();
if (xssfChart.getCTChartSpace().getSpPr().getSolidFill().getSrgbClr() == null)
xssfChart.getCTChartSpace().getSpPr().getSolidFill().addNewSrgbClr();
xssfChart.getCTChartSpace().getSpPr().getSolidFill().getSrgbClr().setVal(new byte[]{(byte)255,(byte)255,(byte)255});
if (xssfChart.getCTChartSpace().getSpPr().getLn() == null) xssfChart.getCTChartSpace().getSpPr().addNewLn();
xssfChart.getCTChartSpace().getSpPr().getLn().setW(Units.pixelToEMU(1));
if (xssfChart.getCTChartSpace().getSpPr().getLn().getSolidFill() == null)
xssfChart.getCTChartSpace().getSpPr().getLn().addNewSolidFill();
if (xssfChart.getCTChartSpace().getSpPr().getLn().getSolidFill().getSrgbClr() == null)
xssfChart.getCTChartSpace().getSpPr().getLn().getSolidFill().addNewSrgbClr();
xssfChart.getCTChartSpace().getSpPr().getLn().getSolidFill().getSrgbClr().setVal(new byte[]{(byte)0,(byte)0,(byte)0});
// line style of cat axis
if (xssfChart.getCTChart().getPlotArea().getCatAxArray(0).getSpPr() == null)
xssfChart.getCTChart().getPlotArea().getCatAxArray(0).addNewSpPr();
if (xssfChart.getCTChart().getPlotArea().getCatAxArray(0).getSpPr().getLn() == null)
xssfChart.getCTChart().getPlotArea().getCatAxArray(0).getSpPr().addNewLn();
xssfChart.getCTChart().getPlotArea().getCatAxArray(0).getSpPr().getLn().setW(Units.pixelToEMU(1));
if (xssfChart.getCTChart().getPlotArea().getCatAxArray(0).getSpPr().getLn().getSolidFill() == null)
xssfChart.getCTChart().getPlotArea().getCatAxArray(0).getSpPr().getLn().addNewSolidFill();
if (xssfChart.getCTChart().getPlotArea().getCatAxArray(0).getSpPr().getLn().getSolidFill().getSrgbClr() == null)
xssfChart.getCTChart().getPlotArea().getCatAxArray(0).getSpPr().getLn().getSolidFill().addNewSrgbClr();
xssfChart.getCTChart().getPlotArea().getCatAxArray(0).getSpPr().getLn().getSolidFill().getSrgbClr()
.setVal(new byte[]{(byte)0,(byte)0,(byte)0});
//line style of val axis
if (xssfChart.getCTChart().getPlotArea().getValAxArray(0).getSpPr() == null)
xssfChart.getCTChart().getPlotArea().getValAxArray(0).addNewSpPr();
if (xssfChart.getCTChart().getPlotArea().getValAxArray(0).getSpPr().getLn() == null)
xssfChart.getCTChart().getPlotArea().getValAxArray(0).getSpPr().addNewLn();
xssfChart.getCTChart().getPlotArea().getValAxArray(0).getSpPr().getLn().setW(Units.pixelToEMU(1));
if (xssfChart.getCTChart().getPlotArea().getValAxArray(0).getSpPr().getLn().getSolidFill() == null)
xssfChart.getCTChart().getPlotArea().getValAxArray(0).getSpPr().getLn().addNewSolidFill();
if (xssfChart.getCTChart().getPlotArea().getValAxArray(0).getSpPr().getLn().getSolidFill().getSrgbClr() == null)
xssfChart.getCTChart().getPlotArea().getValAxArray(0).getSpPr().getLn().getSolidFill().addNewSrgbClr();
xssfChart.getCTChart().getPlotArea().getValAxArray(0).getSpPr().getLn().getSolidFill().getSrgbClr()
.setVal(new byte[]{(byte)0,(byte)0,(byte)0});
// line style of the series
for (int i = 0; i < 4; i++) {
if (xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getSpPr() == null)
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).addNewSpPr();
if (xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getSpPr().getLn() == null)
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getSpPr().addNewLn();
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i)
.getSpPr().getLn().setW(Units.pixelToEMU(3));
if (xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getSpPr().getLn().getSolidFill() == null)
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getSpPr().getLn().addNewSolidFill();
if (xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getSpPr().getLn().getSolidFill().getSrgbClr() == null)
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getSpPr().getLn().getSolidFill().addNewSrgbClr();
}
// first series red
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0)
.getSpPr().getLn().getSolidFill().getSrgbClr().setVal(new byte[]{(byte)255,(byte)0,(byte)0});
// second series green
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(1)
.getSpPr().getLn().getSolidFill().getSrgbClr().setVal(new byte[]{(byte)0,(byte)255,(byte)0});
// third series blue
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(2)
.getSpPr().getLn().getSolidFill().getSrgbClr().setVal(new byte[]{(byte)0,(byte)0,(byte)255});
// fourth series yellow
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(3)
.getSpPr().getLn().getSolidFill().getSrgbClr().setVal(new byte[]{(byte)255,(byte)255,(byte)0});
// set line data series to not smooth the line
for (int i = 0; i < 4; i++) {
if (xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getSmooth() == null)
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).addNewSmooth();
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getSmooth().setVal(false);
}
// set or unset tick marks
for (int i = 0; i < 4; i++) {
if (xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getMarker() == null)
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).addNewMarker();
if (xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getMarker().getSymbol() == null)
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(i).getMarker().addNewSymbol();
}
// no tick marks
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(0).getMarker().getSymbol().setVal(
org.openxmlformats.schemas.drawingml.x2006.chart.STMarkerStyle.NONE);
// diamond tick marks
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(1).getMarker().getSymbol().setVal(
org.openxmlformats.schemas.drawingml.x2006.chart.STMarkerStyle.DIAMOND);
// auto tick marks = marker set but no symbol given
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(2).getMarker().unsetSymbol();
// no tick marks
xssfChart.getCTChart().getPlotArea().getLineChartArray(0).getSerArray(3).getMarker().getSymbol().setVal(
org.openxmlformats.schemas.drawingml.x2006.chart.STMarkerStyle.NONE);
}
wb.write(new FileOutputStream("CreateExcelLineChartAndCustomize.xlsx"));
wb.close();
}
}
结果:
这篇关于更改折线图Apache POI的颜色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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