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[英]Drawing a line between two points in PowerPoint slide using Apache POI
[英]I'm trying to change the values of a line graph in a slide but it is not working using POI
我正在使用Apache POI 4.01並試圖使用帶有單個折線圖作為模板的powerpoint幻燈片,然后使用它來生成一個在圖表中具有一些不同值的新幻燈片,但我正在復制相同的幻燈片而沒有任何值更改。 請幫助。
我正在使用powerpoint幻燈片中的簡單折線圖嘗試以下代碼。
public static void main(String[] args) throws IOException {
// creating presentation
XMLSlideShow ppt = new XMLSlideShow();
File file1 = new File("MyDrive://LineSample.pptx");
FileInputStream inputstream;
try {
inputstream = new FileInputStream(file1);
XMLSlideShow template = new XMLSlideShow(inputstream);
XMLSlideShow testReport = new XMLSlideShow();
XSLFSlide xslfSlide = template.getSlides().get(0);
// TODO Auto-generated method stub
// adding slides to the slideshow
XSLFSlide slide1 = testReport.createSlide();
XSLFSlideLayout src_sl = xslfSlide.getSlideLayout();
XSLFSlideMaster src_sm = xslfSlide.getSlideMaster();
XSLFSlideLayout new_sl = slide1.getSlideLayout();
XSLFSlideMaster new_sm = slide1.getSlideMaster();
// copy source layout to the new layout
new_sl.importContent(src_sl);
// copy source master to the new master
new_sm.importContent(src_sm);
slide1.importContent(xslfSlide);
XSLFSlide slide = xslfSlide;
// find chart in the slide
XSLFChart chart = null;
for (POIXMLDocumentPart part : slide.getRelations()) {
if (part instanceof XSLFChart) {
chart = (XSLFChart) part;
break;
}
}
if (chart == null) {
throw new IllegalStateException("chart not found in the template");
} else {
System.out.println("Chart Found");
}
// Series Text
List<XDDFChartData> series = chart.getChartSeries();
XDDFLineChartData linechart = (XDDFLineChartData) series.get(0);
// Category
List<String> listCategories = new ArrayList<>(3);
listCategories.add("Test1");
listCategories.add("Test2");
listCategories.add("Test3");
// Values
List<Double> listValues = new ArrayList<>(3);
listValues.add(10.00);
listValues.add(20.00);
listValues.add(30.00);
String[] categories = listCategories.toArray(new String[listCategories.size()]);
Double[] values = listValues.toArray(new Double[listValues.size()]);
final int numOfPoints = categories.length;
final String categoryDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, 0, 0));
final String valuesDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, 1, 1));
final XDDFDataSource<?> categoriesData = XDDFDataSourcesFactory.fromArray(categories, categoryDataRange);
final XDDFNumericalDataSource<? extends Number> valuesData = XDDFDataSourcesFactory.fromArray(values,
valuesDataRange);
XDDFLineChartData.Series firstSeries = (XDDFLineChartData.Series) linechart.getSeries().get(0);
firstSeries.replaceData(categoriesData, valuesData);
// firstSeries.setTitle("chartTitle",
// chart.setSheetTitle("chartTitle", 0));
firstSeries.setMarkerSize((short) 70);
firstSeries.setMarkerStyle(MarkerStyle.DASH);
firstSeries.setShowLeaderLines(true);
firstSeries.setSmooth(true);
// firstSeries.setShapeProperties(XDDFShapeProperties);
chart.plot(linechart);
FileOutputStream out = new FileOutputStream("MyDrive");
testReport.write(out);
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
沒有錯誤,但圖表值保持不變,所需的實際結果是具有不同值的折線圖。
主要問題是PowerPoint
圖表的數據源是嵌入式Excel
工作表。 此工作表需要更改為圖表中的緩存數據。 這意味着我們需要獲取圖表的數據源,這是一個Excel工作表。 然后我們需要在該表和圖表中設置所有新的類別數據,新系列標題和新數據值。
完整的例子:
讓我們從LineSample.pptx
模板開始:
碼:
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.poi.xslf.usermodel.*;
import org.apache.poi.xddf.usermodel.chart.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ooxml.POIXMLDocumentPart;
public class PowerPointCopySlideChangeChartData {
public static void main(String[] args) throws Exception {
String filePath = "LineSample.pptx"; // has template line chart
String filePathNew = "LineSample_New.pptx";
Object[][] data = new Object[][] { // new data 1 series, 4 categories
{"", "Amount"}, // series title
{"Jan", 123d}, // category 1
{"Feb", 345d}, // category 2
{"Mar", 180d}, // category 3
{"Apr", 180d} // category 4
};
XMLSlideShow slideShowTemplate = new XMLSlideShow(new FileInputStream(filePath));
XSLFSlide slideTemplate = slideShowTemplate.getSlides().get(0);
XSLFSlideLayout slideLayoutTemplate = slideTemplate.getSlideLayout();
XSLFSlideMaster slideMasterTemplate = slideTemplate.getSlideMaster();
XMLSlideShow slideShowNew = new XMLSlideShow();
XSLFSlide slideNew = slideShowNew.createSlide();
XSLFSlideLayout slideLayoutNew = slideNew.getSlideLayout();
XSLFSlideMaster slideMasterNew = slideNew.getSlideMaster();
slideLayoutNew.importContent(slideLayoutTemplate);
slideMasterNew.importContent(slideMasterTemplate);
slideNew.importContent(slideTemplate);
slideShowTemplate.close();
XSLFChart chart = null;
for (POIXMLDocumentPart part : slideNew.getRelations()) {
if (part instanceof XSLFChart) {
chart = (XSLFChart) part;
break;
}
}
if (chart == null) {
throw new Exception("chart not found in the template");
} else {
System.out.println("Chart Found");
}
XSSFWorkbook chartDataWorkbook = chart.getWorkbook();
String sheetName = chartDataWorkbook.getSheetName(0);
XSSFSheet chartDataSheet = chartDataWorkbook.getSheet(sheetName);
if (chart.getChartSeries().size() == 1) { // we will process only one chart data
XDDFChartData chartData = chart.getChartSeries().get(0);
if (chartData.getSeries().size() == 1) { // we will process exact one series
int rMin = 1;
int rMax = data.length - 1;
// set new category data
XDDFCategoryDataSource category = null;
int c = 0;
for (int r = rMin; r < rMax+1; r++) {
XSSFRow row = chartDataSheet.getRow(r); if (row == null) row = chartDataSheet.createRow(r);
XSSFCell cell = row.getCell(c); if (cell == null) cell = row.createCell(c);
cell.setCellValue((String)data[r][c]); // in sheet
}
category = XDDFDataSourcesFactory.fromStringCellRange(chartDataSheet, new CellRangeAddress(rMin,rMax,c,c)); // in chart
// series 1
XDDFChartData.Series series1 = chartData.getSeries().get(0);
c = 1;
// set new title
String series1Title = (String)data[0][c];
chartDataSheet.getRow(0).getCell(c).setCellValue(series1Title); // in sheet
series1.setTitle(series1Title, new CellReference(sheetName, 0, c, true, true)); // in chart
// set new values
XDDFNumericalDataSource<Double> values = null;
for (int r = rMin; r < rMax+1; r++) {
XSSFRow row = chartDataSheet.getRow(r); if (row == null) row = chartDataSheet.createRow(r);
XSSFCell cell = row.getCell(c); if (cell == null) cell = row.createCell(c);
cell.setCellValue((Double)data[r][c]); // in sheet
}
values = XDDFDataSourcesFactory.fromNumericCellRange(chartDataSheet, new CellRangeAddress(rMin,rMax,c,c));
series1.replaceData(category, values);
series1.plot(); //in chart
series1.setShowLeaderLines(true);
if (series1 instanceof XDDFLineChartData.Series) {
((XDDFLineChartData.Series)series1).setMarkerSize((short) 70);
((XDDFLineChartData.Series)series1).setMarkerStyle(MarkerStyle.DASH);
((XDDFLineChartData.Series)series1).setSmooth(true);
}
}
}
FileOutputStream out = new FileOutputStream(filePathNew);
slideShowNew.write(out);
out.close();
slideShowNew.close();
}
}
結果:
問題是,是否真的有必要將幻燈片從模板復制到新創建的幻燈片放映,因為這會導致格式問題。 在我看來,只需打開整個模板,更改所需的東西,然后將更改的模板保存為新文件將更好。
從相同的模板開始。
碼:
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.poi.xslf.usermodel.*;
import org.apache.poi.xddf.usermodel.chart.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.ss.util.CellRangeAddress;
public class PowerPointChangeChartData {
public static void main(String[] args) throws Exception {
String filePath = "LineSample.pptx"; // has template line chart
String filePathNew = "LineSample_New.pptx";
Object[][] data = new Object[][] { // new data 1 series, 4 categories
{"", "Amount"}, // series title
{"Jan", 123d}, // category 1
{"Feb", 345d}, // category 2
{"Mar", 180d}, // category 3
{"Apr", 180d} // category 4
};
XMLSlideShow slideShow = new XMLSlideShow(new FileInputStream(filePath));
XSLFChart chart = slideShow.getCharts().get(0);
// get chart's data source which is a Excel sheet
XSSFWorkbook chartDataWorkbook = chart.getWorkbook();
String sheetName = chartDataWorkbook.getSheetName(0);
XSSFSheet chartDataSheet = chartDataWorkbook.getSheet(sheetName);
if (chart.getChartSeries().size() == 1) { // we will process only one chart data
XDDFChartData chartData = chart.getChartSeries().get(0);
if (chartData.getSeries().size() == 1) { // we will process exact one series
int rMin = 1;
int rMax = data.length - 1;
// set new category data
XDDFCategoryDataSource category = null;
int c = 0;
for (int r = rMin; r < rMax+1; r++) {
XSSFRow row = chartDataSheet.getRow(r); if (row == null) row = chartDataSheet.createRow(r);
XSSFCell cell = row.getCell(c); if (cell == null) cell = row.createCell(c);
cell.setCellValue((String)data[r][c]); // in sheet
}
category = XDDFDataSourcesFactory.fromStringCellRange(chartDataSheet, new CellRangeAddress(rMin,rMax,c,c)); // in chart
// series 1
XDDFChartData.Series series1 = chartData.getSeries().get(0);
c = 1;
// set new title
String series1Title = (String)data[0][c];
chartDataSheet.getRow(0).getCell(c).setCellValue(series1Title); // in sheet
series1.setTitle(series1Title, new CellReference(sheetName, 0, c, true, true)); // in chart
// set new values
XDDFNumericalDataSource<Double> values = null;
for (int r = rMin; r < rMax+1; r++) {
XSSFRow row = chartDataSheet.getRow(r); if (row == null) row = chartDataSheet.createRow(r);
XSSFCell cell = row.getCell(c); if (cell == null) cell = row.createCell(c);
cell.setCellValue((Double)data[r][c]); // in sheet
}
values = XDDFDataSourcesFactory.fromNumericCellRange(chartDataSheet, new CellRangeAddress(rMin,rMax,c,c));
series1.replaceData(category, values);
series1.plot(); //in chart
series1.setShowLeaderLines(true);
if (series1 instanceof XDDFLineChartData.Series) {
((XDDFLineChartData.Series)series1).setMarkerSize((short) 70);
((XDDFLineChartData.Series)series1).setMarkerStyle(MarkerStyle.DASH);
((XDDFLineChartData.Series)series1).setSmooth(true);
}
}
}
FileOutputStream out = new FileOutputStream(filePathNew);
slideShow.write(out);
out.close();
slideShow.close();
}
}
結果:
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