Apache POI XSSF可以'；不要创造一个向上的箭头

我正在使用ApachePOI处理Excel生成的文件。该文件必须是xlsx而不是xls。 我需要画一些箭头，但我不能画向上的箭头。 我使用

XSSFClientAnchor

创建箭头并指定行/列1和行/列2

XSSFClientAnchor(int dx1, int dy1, int dx2, int dy2, int col1, int row1, int col2, int row2)

它仅在第1列>第2列和第1行>第2行时工作。所以我不能画一个向上的箭头。 如果我试图更改值以获得向上箭头，则Excel无法读取生成的文件。Excel会修复它，但箭头会隐藏

这是我的密码：

public static void test() {
    XSSFWorkbook wb = new XSSFWorkbook();
    XSSFSheet sheet = wb.createSheet("linechart");
    XSSFDrawing pat = sheet.createDrawingPatriarch();

    XSSFClientAnchor anchor = new XSSFClientAnchor(0, 0, 0, 0, 10, 10, 5, 5);

    XSSFSimpleShape shape = pat.createSimpleShape(anchor);
    shape.setShapeType(ShapeTypes.LINE);
    shape.setLineWidth(4);
    shape.setLineStyle(0);
    shape.setLineStyleColor(0, 0, 0);

    FileOutputStream fileOut;
    try {
        fileOut = new FileOutputStream(
                "C:\\monfichier" + new Date().toString().replace(':', '_') + ".xlsx");
        wb.write(fileOut);
        fileOut.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

如果我尝试替换：

XSSFClientAnchor anchor = new XSSFClientAnchor(0, 0, 0, 0, 10, 10, 5, 5);

与：

没关系

---

你能测试一下，告诉我你是怎么想的吗。很难找到POI的信息，我没有发现这个问题…

锚定决定形状的大小。对于线型，默认情况下，直线从第一个定位单元的左上边缘到左上边缘加上最后一个定位单元的

dx

和

dy

。第一个锚点单元是锚点左上方的单元，而最后一个锚点单元是锚点右下方的单元。因此，默认情况下，线条形状将从左上角到右下角

如果我们希望它从左下角到右上角，那么我们必须翻转形状

如果我们在

Excel

中从左下角到右上角画一条线，然后查看存储的

/xl/drawings/drawing1.xml

，我们将看到手动绘制的线条形状也会翻转

两行的示例：

import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.usermodel.*;

import java.io.FileOutputStream;

class CreateExcelLineShapes {

 public static void main(String[] args) throws Exception{

  Workbook workbook = new XSSFWorkbook();
  Sheet sheet = workbook.createSheet("Sheet1");

  CreationHelper helper = workbook.getCreationHelper();
  Drawing drawing = sheet.createDrawingPatriarch();

  ClientAnchor anchor = helper.createClientAnchor();

  //Anchor B2:C4
  //This determines the size of the line shape to be from 
  //upper left edge of B2 to upper left edge of C4 plus dx and dy.
  //Since dx and dy are both 0, this is the bottom right edge of B3.
  anchor.setCol1(1);
  anchor.setRow1(1); 
  anchor.setCol2(2);
  anchor.setRow2(3);

  //From here on XSSF only.
  XSSFDrawing xssfdrawing = (XSSFDrawing)drawing;
  XSSFClientAnchor xssfanchor = (XSSFClientAnchor)anchor;

  //Draw a line from upper left edge of B2 to upper left edge of C4 = bottom right edge of B3.
  //This is the default.
  XSSFSimpleShape xssfshape = xssfdrawing.createSimpleShape(xssfanchor);
  xssfshape.setShapeType(ShapeTypes.LINE);
  xssfshape.setLineWidth(4);
  xssfshape.setLineStyle(0);
  xssfshape.setLineStyleColor(0, 0, 0);

  //This sets the arrow line end type:
  xssfshape.getCTShape().getSpPr().getLn().addNewTailEnd().setType(
    org.openxmlformats.schemas.drawingml.x2006.main.STLineEndType.TRIANGLE);

  //Again draw a line from upper left edge of B2 to upper left edge of C4 = bottom right edge of B3.
  xssfshape = xssfdrawing.createSimpleShape(xssfanchor);
  xssfshape.setShapeType(ShapeTypes.LINE);
  xssfshape.setLineWidth(4);
  xssfshape.setLineStyle(0);
  xssfshape.setLineStyleColor(0, 0, 0);

  //Now flip this vertically.
  //So it now will to be from bottom left edge of B3 to upper left edge of B2.
  xssfshape.getCTShape().getSpPr().getXfrm().setFlipV(true);

  xssfshape.getCTShape().getSpPr().getLn().addNewTailEnd().setType(
    org.openxmlformats.schemas.drawingml.x2006.main.STLineEndType.TRIANGLE);

  workbook.write(new FileOutputStream("CreateExcelLineShapes.xlsx"));
  workbook.close();

 }
}

结果:

import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.usermodel.*;

import java.io.FileOutputStream;

class CreateExcelLineShapes {

 public static void main(String[] args) throws Exception{

  Workbook workbook = new XSSFWorkbook();
  Sheet sheet = workbook.createSheet("Sheet1");

  CreationHelper helper = workbook.getCreationHelper();
  Drawing drawing = sheet.createDrawingPatriarch();

  ClientAnchor anchor = helper.createClientAnchor();

  //Anchor B2:C4
  //This determines the size of the line shape to be from 
  //upper left edge of B2 to upper left edge of C4 plus dx and dy.
  //Since dx and dy are both 0, this is the bottom right edge of B3.
  anchor.setCol1(1);
  anchor.setRow1(1); 
  anchor.setCol2(2);
  anchor.setRow2(3);

  //From here on XSSF only.
  XSSFDrawing xssfdrawing = (XSSFDrawing)drawing;
  XSSFClientAnchor xssfanchor = (XSSFClientAnchor)anchor;

  //Draw a line from upper left edge of B2 to upper left edge of C4 = bottom right edge of B3.
  //This is the default.
  XSSFSimpleShape xssfshape = xssfdrawing.createSimpleShape(xssfanchor);
  xssfshape.setShapeType(ShapeTypes.LINE);
  xssfshape.setLineWidth(4);
  xssfshape.setLineStyle(0);
  xssfshape.setLineStyleColor(0, 0, 0);

  //This sets the arrow line end type:
  xssfshape.getCTShape().getSpPr().getLn().addNewTailEnd().setType(
    org.openxmlformats.schemas.drawingml.x2006.main.STLineEndType.TRIANGLE);

  //Again draw a line from upper left edge of B2 to upper left edge of C4 = bottom right edge of B3.
  xssfshape = xssfdrawing.createSimpleShape(xssfanchor);
  xssfshape.setShapeType(ShapeTypes.LINE);
  xssfshape.setLineWidth(4);
  xssfshape.setLineStyle(0);
  xssfshape.setLineStyleColor(0, 0, 0);

  //Now flip this vertically.
  //So it now will to be from bottom left edge of B3 to upper left edge of B2.
  xssfshape.getCTShape().getSpPr().getXfrm().setFlipV(true);

  xssfshape.getCTShape().getSpPr().getLn().addNewTailEnd().setType(
    org.openxmlformats.schemas.drawingml.x2006.main.STLineEndType.TRIANGLE);

  workbook.write(new FileOutputStream("CreateExcelLineShapes.xlsx"));
  workbook.close();

 }
}