导出Excel一些格式、样式的代码

news2024/11/19 2:17:16

1.合并单元格

  // 合并单元格（开始行, 结束行, 开始列, 结束列）
        CellRangeAddress regionRow0 = new CellRangeAddress(0, 0, 0, 10);
        sheet.addMergedRegion(regionRow0);

2.单元格根据汉字自动匹配颜色

  HSSFConditionalFormattingRule orange = scf.createConditionalFormattingRule(
                ComparisonOperator.EQUAL, "\"橙色\"", null);
        HSSFFontFormatting cf_orange = orange.createFontFormatting();
        cf_orange.setFontColor(HSSFColor.HSSFColorPredefined.ORANGE.getColor());

        HSSFConditionalFormattingRule brown = scf.createConditionalFormattingRule(
                ComparisonOperator.EQUAL, "\"棕色\"", null);
        HSSFFontFormatting cf_brown = brown.createFontFormatting();
        cf_brown.setFontColor(HSSFColor.HSSFColorPredefined.BROWN.getColor());

        HSSFConditionalFormattingRule black = scf.createConditionalFormattingRule(
                ComparisonOperator.EQUAL, "\"黑色\"", null);
        HSSFFontFormatting cf_black = black.createFontFormatting();
        cf_black.setFontColor(HSSFColor.HSSFColorPredefined.BLACK.getColor());

        HSSFConditionalFormattingRule[] cfRules = {cf_Red_rule, cf_Blue_rule, cf_violet_rule, dark_blue, light_blue,
                dark_green, light_green, yellow, orange, brown, black};

        //条件格式应用的单元格范围 (第四列，第一行到10000行)
        CellRangeAddress[] regions = {new CellRangeAddress(1, 10000, 4, 4)};

        for (HSSFConditionalFormattingRule rule : cfRules) {
            scf.addConditionalFormatting(regions, rule);
        }

3.设置列为下拉框

 // 班次背景、字体颜色，赋值下拉框
        String colour = "color";
        Map<String, String> colourMap = new HashMap<>(4);
        // map的value值为颜色名称字符串集合
        colourMap.put(colour, ColourEnum.getColourName());
        // 1000表示该列填充1000行
        HSSFDataValidation backgroundValidation = ExcelUtil.createBox(colour, colourMap, 1, 1000, 3, 3);
        HSSFDataValidation fontValidation = ExcelUtil.createBox(colour, colourMap, 1, 1000, 4, 4);
        if (backgroundValidation != null) {
            sheet.addValidationData(backgroundValidation);
            sheet.addValidationData(fontValidation);
        }

/**
     *  excel导出，有码值的数据使用下拉框展示。
     * @param col             列名
     * @param boxMap          码值集合
     * @param firstRow        插入下拉框开始行号
     * @param lastRow         插入下拉框结束行号
     * @param firstCol        插入下拉框开始列号
     * @param lastCol         插入下拉框结束行号
     * @return
     */
    public static HSSFDataValidation createBox(String col, Map<String, String> boxMap, int firstRow, int lastRow, int firstCol, int lastCol) {
        HSSFDataValidation dataValidation = null;
        //查询码值表
        String cols = "";
        if(null != boxMap.get(col)) {
            cols = boxMap.get(col);
        }
        //设置下拉框
        if(cols.length() > 0 && null != cols) {
            String str[] = cols.split(",");

            //指定行，列为下拉框
            CellRangeAddressList cas = new CellRangeAddressList(firstRow , lastRow , firstCol , lastCol);

            //创建下拉数据列
            DVConstraint dvConstraint = DVConstraint.createExplicitListConstraint(str);

            //将下拉数据放入下拉框
            dataValidation = new HSSFDataValidation(cas, dvConstraint);
        }
        return dataValidation;
    }