Apache POI：如何添加对angular边框

我想使用Apache POI来绘制Diagonal Border但我找不到任何function可以支持该function。

我试过这个setBorderDiagonal，但它不工作。

 XSSFSheetConditionalFormatting my_cond_format_layer = my_sheet.getSheetConditionalFormatting(); XSSFConditionalFormattingRule my_rule = my_cond_format_layer.createConditionalFormattingRule(ComparisonOperator.BETWEEN, "14", "16"); XSSFConditionalFormattingRule my_rule_2 = my_cond_format_layer.createConditionalFormattingRule(ComparisonOperator.EQUAL, "33"); XSSFPatternFormatting fill_pattern_2 = my_rule_2.createPatternFormatting(); fill_pattern_2.setFillBackgroundColor(IndexedColors.YELLOW.getIndex()); XSSFBorderFormatting borderFormatting = my_rule_2.createBorderFormatting(); borderFormatting.setDiagonalBorderColor(IndexedColors.BLUE.getIndex()); borderFormatting.setBorderDiagonal(BorderFormatting.BORDER_THICK); ConditionalFormattingRule[] multiple_rules = {my_rule, my_rule_2}; CellRangeAddress[] my_data_range = {CellRangeAddress.valueOf("A1:A4")}; my_cond_format_layer.addConditionalFormatting(my_data_range, multiple_rules); 

Answer 1

我不知道为什么在XSSFCellStyle没有setBorderDiagonal直到现在。 但是，如果我们看看其他setBorder...方法的代码，那么我们可以制作自己的setBorderDiagonal 。

例：

 import org.apache.poi.ss.usermodel.*; import org.apache.poi.xssf.usermodel.*; import org.apache.poi.xssf.usermodel.extensions.XSSFCellBorder; import org.apache.poi.xssf.model.StylesTable; import org.apache.poi.xssf.model.ThemesTable; import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTXf; import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTBorder; import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTBorderPr; import org.openxmlformats.schemas.spreadsheetml.x2006.main.STBorderStyle; import java.io.FileOutputStream; import java.io.IOException; class CellDiagonalBorders { private static CTBorder getCTBorder(StylesTable _stylesSource, CTXf _cellXf ){ CTBorder ct; if(_cellXf.getApplyBorder()) { int idx = (int)_cellXf.getBorderId(); XSSFCellBorder cf = _stylesSource.getBorderAt(idx); ct = (CTBorder)cf.getCTBorder().copy(); } else { ct = CTBorder.Factory.newInstance(); } return ct; } public static void setBorderDiagonal(short border, StylesTable _stylesSource, CTXf _cellXf , ThemesTable _theme) { CTBorder ct = getCTBorder(_stylesSource, _cellXf); CTBorderPr pr = ct.isSetDiagonal() ? ct.getDiagonal() : ct.addNewDiagonal(); if(border == BorderFormatting.BORDER_NONE) { ct.unsetDiagonal(); } else { ct.setDiagonalDown(true); ct.setDiagonalUp(true); pr.setStyle(STBorderStyle.Enum.forInt(border + 1)); } int idx = _stylesSource.putBorder(new XSSFCellBorder(ct, _theme)); _cellXf.setBorderId(idx); _cellXf.setApplyBorder(true); } public static void main(String[] args) { try { Workbook wb = new XSSFWorkbook(); Sheet sheet = wb.createSheet("Sheet1"); Cell cell = sheet.createRow(2).createCell(2); CellStyle style = wb.createCellStyle(); StylesTable _stylesSource = ((XSSFWorkbook)wb).getStylesSource(); ThemesTable _theme = _stylesSource.getTheme(); CTXf _cellXf = ((XSSFCellStyle)style).getCoreXf(); setBorderDiagonal(BorderFormatting.BORDER_THICK, _stylesSource, _cellXf, _theme); cell.setCellStyle(style); FileOutputStream fileOut = new FileOutputStream("CellDiagonalBorders.xlsx"); wb.write(fileOut); } catch (IOException ioex) { } } }