我有一系列Excel电子表格,每个电子表格至少有一页数据和一页从数据创建的图表。我需要捕获(不从数据重新生成)现有图表作为Web友好图像。这可能通过Java或.Net吗?我知道POI的东西(Java)不会这样做(或者我告诉过,我自己没有尝试过)。
答案 0 :(得分:2)
您是否尝试过使用Chart.Export方法?
帮助中的示例是:
Worksheets("Sheet1").ChartObjects(1).Chart. Export _
FileName:="current_sales.gif", FilterName:="GIF"
从内存来看,我认为你也可以导出到PNG。
答案 1 :(得分:1)
图表图像不存储在工作簿中,因此您需要一个可以呈现Excel兼容图表的组件。
SpreadsheetGear for .NET将允许您加载Excel工作簿,可选择插入新值/公式/格式/等...,计算,然后从一系列单元格或图表中获取图像。
如果您想亲自试用,可以查看一些示例here并下载免费试用here。
免责声明:我拥有SpreadsheetGear LLC
答案 2 :(得分:1)
您可以使用J XL或Aspose Cells转换或复制图表(图表)(Aspose不是免费的)。
这是将Excel图表提取到图片
的代码段public class ExportChartToImage
{
public static void main(String[] args) throws Exception
{
//Start Excel
Application excelApp = new Application();
excelApp.setVisible(true);
//Create test workbook
Workbook workbook = excelApp.createWorkbook("/home/tejus/Desktop/Chart Test");
//Get the first (and the only) worksheet
final Worksheet worksheet1 = workbook.getWorksheet(1);
//Fill-in the first worksheet with sample data
worksheet1.getCell("A1").setValue("Date");
worksheet1.getCell("A2").setValue("March 1");
worksheet1.getCell("A3").setValue("March 8");
worksheet1.getCell("A4").setValue("March 15");
worksheet1.getCell("B1").setValue("Customer");
worksheet1.getCell("B2").setValue("Smith");
worksheet1.getCell("B3").setValue("Jones");
worksheet1.getCell("B4").setValue("James");
worksheet1.getCell("C1").setValue("Sales");
worksheet1.getCell("C2").setValue("23");
worksheet1.getCell("C3").setValue("17");
worksheet1.getCell("C4").setValue("39");
excelApp.getOleMessageLoop().doInvokeAndWait(new Runnable()
{
public void run()
{
final Variant unspecified = Variant.createUnspecifiedParameter();
final Int32 localeID = new Int32(LocaleID.LOCALE_SYSTEM_DEFAULT);
Range sourceDataNativePeer = worksheet1.getRange("A1:C4").getPeer();
_Worksheet worksheetNativePeer = worksheet1.getPeer();
IDispatch chartObjectDispatch = worksheetNativePeer.chartObjects(unspecified, localeID);
ChartObjectsImpl chartObjects = new ChartObjectsImpl(chartObjectDispatch);
ChartObject chartObject = chartObjects.add(new DoubleFloat(100), new DoubleFloat(150), new DoubleFloat(300), new DoubleFloat(225));
_Chart chart = chartObject.getChart();
chart.setSourceData(sourceDataNativePeer, new Variant(XlRowCol.xlRows));
BStr fileName = new BStr("/home/tejus/Desktop/chart.gif");
Variant filterName = new Variant("gif");
Variant interactive = new Variant(false);
chart.export(fileName, filterName, interactive);
chart.setAutoDelete(false);
chart.release();
chartObject.setAutoDelete(false);
chartObject.release();
chartObjects.setAutoDelete(false);
chartObjects.release();
chartObjectDispatch.setAutoDelete(false);
chartObjectDispatch.release();
}
});
System.out.println("Press 'Enter' to terminate the application");
System.in.read();
//Close the MS Excel application.
boolean saveChanges = false;
workbook.close(saveChanges);
boolean forceQuit = true;
excelApp.close(forceQuit);
}
}
我使用了J excel