java jxl导出数据，单元格加上颜色

某个需求导出的excel数据有等级，需要加上等级颜色

• 颜色转换工具类

  public class ColourUtil {
         
  
  
    /**
     * 将颜色编码转为Colour
     *
     * @param strColor 颜色编码
     * @return Colour
     * @author dyc
     * date:   2020/9/7 11:17
     */
    public static Colour getNearestColour(String strColor) {
         
        Color cl = Color.decode(strColor);
        Colour color = null;
        Colour[] colors = Colour.getAllColours();
        if ((colors != null) && (colors.length > 0)) {
         
            int[] rgb = null;
            int diff = 0;
            int minDiff = 999;
            for (Colour crtColor:colors) {
         
                rgb = new int[3];
                rgb[0] = crtColor.getDefaultRGB().getRed();
                rgb[1] = crtColor.getDefaultRGB().getGreen();
                rgb[2] = crtColor.getDefaultRGB().getBlue();
  
                diff = Math.abs(rgb[0] - cl.getRed())
                        + Math.abs(rgb[1] - cl.getGreen())
                        + Math.abs(rgb[2] - cl.getBlue());
                if (diff < minDiff) {
         
                    minDiff = diff;
                    color = crtColor;
                }
            }
        }
        if (color == null)
            color = Colour.BLACK;
        return color;
    }
  
    public static void main(String[] args){
         
        System.out.print(getNearestColour("#FFFFFF"));
    }
  }
  

• 加颜色核心代码

  if (!StringUtil.isInvalid(item.getRankColor())){
     
       // 设置自定义颜色，通过java.awt.Color中decode方法提取16进制颜色值
       WritableFont font = new WritableFont(WritableFont.createFont("宋体"),
                               10, WritableFont.NO_BOLD);// 字体样式

         WritableCellFormat wcf1 = new WritableCellFormat(font);// 单元格样式
          wcf1.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.THIN,jxl.format.Colour.GREY_50_PERCENT);
          wcf1.setBackground(ColourUtil.getNearestColour(item.getRankColor()));// 调用工具类，#FFFFFF 也可以直接赋值
            ws.addCell(new jxl.write.Label(14, count, "", wcf1));
   }

• 完整代码

      public void exportDeptEvaluateData(EvaDeptEvaluateQuery query, HttpServletResponse response, HttpServletRequest httpServletRequest) {
         
        String excelName = "责任单位评价统计表";
        if (query.getObjType() == 2){
         
            excelName = "区域评价统计表";
        }
        String startTime = TimeUtil.formatDateyyyyMMdd(query.getStartTime());
        String endTime = TimeUtil.formatDateyyyyMMdd(query.getEndTime());
        excelName = excelName+startTime+"至"+endTime;
        List<EvaDeptEvaluateFcgVO> list = calculateDeptEvaluateData(query);
        if (list != null && !list.isEmpty()) {
         
            String excel = excelName +".xls";
            try {
         
                response.reset();
                response.setCharacterEncoding("utf-8");
                response.setContentType("application/vnd.ms-excel");
                response.setHeader("Content-Disposition", "attachment;fileName=" + KeHttpRequestUtil.fileNameEncoding(excel,httpServletRequest));
                WritableWorkbook wwb = Workbook.createWorkbook(response.getOutputStream());
                jxl.write.Label lb = null;
                jxl.write.WritableSheet ws = wwb.createSheet("第1页", 0);// 工作薄
                jxl.write.WritableFont wf = new jxl.write.WritableFont(WritableFont.ARIAL, 18, WritableFont.BOLD, false);// 样式
                jxl.write.WritableCellFormat wcfF = new jxl.write.WritableCellFormat(wf);
                wcfF.setAlignment(jxl.format.Alignment.CENTRE);// 设置为居中
                ws.mergeCells(0, 0, 8, 0);// 合并每一行的1-9列
                lb = new jxl.write.Label(0, 0, excelName, wcfF);
                wf = new jxl.write.WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD, false);// 样式
                wcfF = new jxl.write.WritableCellFormat(wf);
                wcfF.setAlignment(jxl.format.Alignment.CENTRE);// 设置为居中
                ws.addCell(lb);
                String[] title = {
         "责任单位", "应处置数", "按时处置数","超时处置数", "返工处置数", "处置率", "得分", "督办处置数",
                        "督办未处置数","督办整改率", "得分","工作量考核得分","专项扣分","综合得分","等级颜色"};
                for (int i = 0; i < title.length; i++) {
         // 设置标题
                    ws.setColumnView(i, 20);// 设置列的宽度
                    lb = new jxl.write.Label(i, 1, title[i], wcfF);
                    ws.addCell(lb);
                }
                int count = 2;
                for (EvaDeptEvaluateFcgVO item : list) {
         // 数据
                    lb = new jxl.write.Label(0, count, item.getObjName());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(1, count, item.getShouldDisposedNum().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(2, count, item.getOntimeDisposedNum().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(3, count, item.getOvertimeDisposedNum().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(4, count, item.getReworkNum().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(5, count, item.getDisposedPercent().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(6, count, item.getDisposedScore().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(7, count, item.getShouldDisposedNum().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(8, count, item.getSuperviseUndisposedNum().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(9, count, item.getSuperviseAbarbeitungRate().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(10, count, item.getSuperviseScore().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(11, count, item.getWorkloadScore().toString());
                    ws.addCell(lb);
                    lb = new jxl.write.Label(12, count, String.valueOf(item.getSpecialPoint()));
                    ws.addCell(lb);
                    lb = new jxl.write.Label(13, count, item.getTotalScore().toString());
                    ws.addCell(lb);
  
                    if (!StringUtil.isInvalid(item.getRankColor())){
         
                        // 设置自定义颜色，通过java.awt.Color中decode方法提取16进制颜色值
                        WritableFont font = new WritableFont(WritableFont.createFont("宋体"),
                                10, WritableFont.NO_BOLD);// 字体样式
  
                        WritableCellFormat wcf1 = new WritableCellFormat(font);// 单元格样式
                        wcf1.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.THIN,jxl.format.Colour.GREY_50_PERCENT);
                        wcf1.setBackground(ColourUtil.getNearestColour(item.getRankColor()));// #FFFFFF
                        ws.addCell(new jxl.write.Label(14, count, "", wcf1));
                    }
  
                    count++;
                }
                // 写入Exel工作表
                wwb.write();
                response.getOutputStream().flush();
                // 关闭Excel工作薄对象
                wwb.close();
            } catch (Exception e) {
         
                e.printStackTrace();
            }
        }
  
    }
  

• 效果图