Java 使用Apache POI更改Excel折线图中的数据范围
我试图看看是否可以使用ApachePOI更改折线图中系列的数据范围 我能够从图表本身中提取序列,但找不到允许我更改数据范围的方法Java 使用Apache POI更改Excel折线图中的数据范围,java,charts,apache-poi,xssf,Java,Charts,Apache Poi,Xssf,我试图看看是否可以使用ApachePOI更改折线图中系列的数据范围 我能够从图表本身中提取序列,但找不到允许我更改数据范围的方法 XSSFWorkbook workbook = new XSSFWorkbook("C:\\Workbook.xlsx"); Sheet worksheet = workbook.getSheetAt(0); XSSFDrawing drawing = (XSSFDrawing) worksheet.createDrawingPatriarch(); List<
XSSFWorkbook workbook = new XSSFWorkbook("C:\\Workbook.xlsx");
Sheet worksheet = workbook.getSheetAt(0);
XSSFDrawing drawing = (XSSFDrawing) worksheet.createDrawingPatriarch();
List<XSSFChart> charts = drawing.getCharts();
for (XSSFChart chart : charts) {
String title = chart.getTitleText().toString();
if (title.equals("Z-Acceleration")) {
CTChart cc = chart.getCTChart();
CTPlotArea plotArea = cc.getPlotArea();
CTLineSer[] ccc = plotArea.getLineChartArray()[0].getSerArray();
for (CTLineSer s : ccc) {
System.out.println(s.xmlText());
}
System.out.println(ccc.length);
}
}
xssf工作簿=新的xssf工作簿(“C:\\workbook.xlsx”);
工作表=工作簿。getSheetAt(0);
XSSFDrawing=(XSSFDrawing)工作表。CreateDrawingParacher();
列表图表=drawing.getCharts();
用于(XSSFChart图表:图表){
字符串标题=chart.getTitletText().toString();
if(标题等于(“Z加速度”)){
CTChart cc=chart.getCTChart();
CTPlotArea plotArea=cc.getPlotArea();
CTLineSer[]ccc=plotArea.getLineChartArray()[0].GetSerray();
用于(CTLineSer s:ccc){
System.out.println(s.xmlText());
}
系统输出打印长度(ccc长度);
}
}
我打印了XML文本,以查看它是否确实能够正确地从图表中提取该系列,是否能够找到其标题和数据范围,但无法对其进行更改。好的,因为这是一个很好的问题,让我们举一个具体的示例,说明如何使用
apache poi
更改Excel折线图中的数据范围
让我们从以下表格开始:
然后输入以下代码:
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.SpreadsheetVersion;
import org.openxmlformats.schemas.drawingml.x2006.chart.*;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.List;
class ExcelChangeChartDataSource {
static XSSFChart getChartWithTitle(XSSFSheet sheet, String wantedTitle) {
if (sheet == null || wantedTitle == null) return null;
XSSFDrawing drawing = sheet.createDrawingPatriarch();
List<XSSFChart> charts = drawing.getCharts();
for (XSSFChart chart : charts) {
String title = chart.getTitleText().toString();
if (wantedTitle.equals(title)) return chart;
}
return null;
}
static void addMonthDataToChart(XSSFSheet sheet, XSSFChart chart, String month, Double[] seriesData) {
CTChart ctChart = chart.getCTChart();
CTPlotArea ctPlotArea = ctChart.getPlotArea();
List<CTLineSer> ctLineSerList = ctPlotArea.getLineChartArray(0).getSerList();
Row row;
Cell cell;
int ser = 0;
for (CTLineSer ctLineSer : ctLineSerList) {
CTAxDataSource cttAxDataSource = ctLineSer.getCat();
CTStrRef ctStrRef = cttAxDataSource.getStrRef();
AreaReference catReference = new AreaReference(ctStrRef.getF(), SpreadsheetVersion.EXCEL2007);
CellReference firstCatCell = catReference.getFirstCell();
CellReference lastCatCell = catReference.getLastCell();
if (firstCatCell.getCol() == lastCatCell.getCol()) {
int col = firstCatCell.getCol();
int lastRow = lastCatCell.getRow();
row = sheet.getRow(lastRow+1); if (row == null) row = sheet.createRow(lastRow+1);
cell = row.getCell(col); if (cell == null) cell = row.createCell(col);
cell.setCellValue(month);
ctStrRef.setF(new AreaReference(
firstCatCell,
new CellReference(lastCatCell.getSheetName(), lastRow+1, col, true, true),
SpreadsheetVersion.EXCEL2007).formatAsString()
);
CTNumDataSource ctNumDataSource = ctLineSer.getVal();
CTNumRef ctNumRef = ctNumDataSource.getNumRef();
AreaReference numReference = new AreaReference(ctNumRef.getF(), SpreadsheetVersion.EXCEL2007);
CellReference firstNumCell = numReference.getFirstCell();
CellReference lastNumCell = numReference.getLastCell();
if (lastNumCell.getRow() == lastRow && firstNumCell.getCol() == lastNumCell.getCol()) {
col = firstNumCell.getCol();
row = sheet.getRow(lastRow+1); if (row == null) row = sheet.createRow(lastRow+1);
cell = row.getCell(col); if (cell == null) cell = row.createCell(col);
if (ser < seriesData.length) cell.setCellValue(seriesData[ser]);
ctNumRef.setF(new AreaReference(
firstNumCell,
new CellReference(lastNumCell.getSheetName(), lastRow+1, col, true, true),
SpreadsheetVersion.EXCEL2007).formatAsString()
);
}
}
ser++;
}
}
public static void main(String[] args) throws Exception {
XSSFWorkbook workbook = (XSSFWorkbook)WorkbookFactory.create(new FileInputStream("WorkbookWithChart.xlsx"));
XSSFSheet sheet = workbook.getSheetAt(0);
XSSFChart chart = getChartWithTitle(sheet, "Z-Acceleration");
if (chart != null) {
addMonthDataToChart(sheet, chart, "Apr", new Double[]{7d,3d,5d});
addMonthDataToChart(sheet, chart, "Mai", new Double[]{2d,6d,8d});
addMonthDataToChart(sheet, chart, "Jun", new Double[]{1d,9d,4d});
addMonthDataToChart(sheet, chart, "Jul", new Double[]{5d,6d});
}
FileOutputStream out = new FileOutputStream("WorkbookWithChartNew.xlsx");
workbook.write(out);
out.close();
workbook.close();
}
}
通过将行高设置为零,可以从图表显示中删除数据,而不是添加新行 首先,创建具有最大可能数据范围的图表,如下所示。 然后,使用以下代码设置不希望在高度为零的图形中看到的行
for(int i=8;i<14;i++) {
sheet.getRow(i).setZeroHeight(true);;
}
for(int i=8;i您拥有org.openxmlformats.schemas.drawingml.x2006.chart.CTLineSer
,因此您当然可以更改它。但是您需要知道更改什么(XML
的含义是什么)以及如何更改(下载javadoc的源代码并从中执行javadoc
,以获得API
文档)但是为什么不使用ApachePOI4.1.0的新的XDDF
而不是那样尝试呢?@AxelRichter我意识到我仍然在使用3.17,并且刚刚做了更改。但是,我已经尝试下载ooxml模式的源代码,并且只有编译的类文件,没有javadocs。从下载ooxml-schemas-1.3-sources.jar
。将其解压缩。然后进入目录ooxml-schemas-1.3
并执行javadoc-d javadoc-sourcepath./-subpackages org
。然后在ooxml-schemas-1.3/javadoc
中找到API
文档。从overview tree.html
开始。这是我见过的最详细、最有用的答案之一在这里几年后发现的谢谢Axel。
for(int i=8;i<14;i++) {
sheet.getRow(i).setZeroHeight(true);;
}