我有以下代码块:
File file = new File("myFile.xlsx"); // my file
inputStream = new FileInputStream(file);
System.out.println("reading");
XSSFWorkbook wb = new XSSFWorkbook(inputStream);
XSSFSheet sh = wb.getSheetAt(0); // first sheet
Iterator rowIter = sh.rowIterator();
while(rowIter.hasNext()){ // iterate over all rows
System.out.println("New Row "); // notify of new row
Row myRow = (Row) rowIter.next();
Iterator cellIter = myRow.cellIterator();
while(cellIter.hasNext()){ // iterate over all cells in row
XSSFCell myCell = (XSSFCell) cellIter.next();
//how can I check that myCell has an image?
//(I'm expecting it to be in the fourth cell each time)
System.out.print(" " + myCell); // output cell content on same line
}
}
inputStream.close();
我正在使用 Apache POI 读取 .xlsx 文件。每行可以包含一个单元格,其中包含用户粘贴到其中的图像。
我希望抓取图像并将其编码为 base64。如何在遍历电子表格时检查单元格是否包含图像?
我已经读过 http://poi.apache.org/spreadsheet/quick-guide.html#Images ,但这涉及首先获取所有图像,然后遍历它们。我想遍历单元格并检查图像。
最佳答案
以下代码遍历第一张纸的所有图像。
所以你不需要遍历行/列,而是直接得到位置。
除了OneCellAnchor
和 TwoCellAnchor
还有AbsoluteAnchors
它不能直接与单元格关联。
import org.apache.poi.POIXMLDocumentPart;
import org.apache.poi.openxml4j.opc.*;
import org.apache.poi.xssf.usermodel.*;
import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.*;
public class Images2Cells {
public static void main(String[] args) throws Exception {
OPCPackage opc = OPCPackage.open("auto.xlsx", PackageAccess.READ);
XSSFWorkbook book = new XSSFWorkbook(opc);
XSSFSheet sheet = book.getSheetAt(0);
for (POIXMLDocumentPart pdp : sheet.getRelations()) {
if (!XSSFRelation.DRAWINGS.getRelation().equals(pdp.getPackageRelationship().getRelationshipType())) continue;
PackagePart drawPP = pdp.getPackagePart();
WsDrDocument draw = WsDrDocument.Factory.parse(drawPP.getInputStream());
for (CTOneCellAnchor oneAnc : draw.getWsDr().getOneCellAnchorList()) {
String picId = oneAnc.getPic().getBlipFill().getBlip().getEmbed();
PackageRelationship pr = drawPP.getRelationship(picId);
PackagePart imgPP = drawPP.getRelatedPart(pr);
// byte imgBytes[] = IOUtils.toByteArray(imgPP.getInputStream());
System.out.println(imgPP.getPartName()
+" - Col: "+oneAnc.getFrom().getCol()
+" - Row: "+oneAnc.getFrom().getRow()
);
}
for (CTTwoCellAnchor twoAnc : draw.getWsDr().getTwoCellAnchorList()) {
String picId = twoAnc.getPic().getBlipFill().getBlip().getEmbed();
PackageRelationship pr = drawPP.getRelationship(picId);
PackagePart imgPP = drawPP.getRelatedPart(pr);
System.out.println(imgPP.getPartName()
+" - Col1: "+twoAnc.getFrom().getCol()
+" - Row1: "+twoAnc.getFrom().getRow()
+" - Col2: "+twoAnc.getTo().getCol()
+" - Row2: "+twoAnc.getTo().getRow()
);
}
}
opc.revert();
}
}
关于java - 如何使用 Apache POI 检查单元格是否包含图像?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19280057/