如何在 apache.poi 中为数据栏制作纯色

问题描述

我正在尝试创建一个带有进度条的工作表，它将代表一些进度.

I'm trying to create a sheet with progress bar which will represent some progress.

我正在使用这些库:

1. org.apache.poi:poi:4.1.0
2. org.apache.poi:poi-ooxml:4.1.0
3. org.apache.poi:poi-ooxml-schemas:4.1.0

我得到的只是一个带有渐变的进度条，但我需要一个带有纯色而不是色阶的进度条.

All I get is a progress bar with gradient, but I need a progress bar with solid color instead color scale.

推荐答案

Office Open XML 中定义的所有条件格式数据栏都使用渐变色.甚至没有一个属性或属性来改变它.以后的 Excel 版本使用来自命名空间 x14=http://schemas.microsoft.com/office/spreadsheetml/2009/9/main" 的扩展.但这些不是 Ecma Office Open XML 文件格式标准的一部分.

All conditional formatting data bars defined in Office Open XML are using gradient colors. There is not even a attribute or property to change that. Later Excel versions are using extensions from namespace x14="http://schemas.microsoft.com/office/spreadsheetml/2009/9/main". But those are not part of the Ecma Office Open XML File Formats Standard.

Apache poi 到目前为止仅基于 Ecma Office Open XML 文件格式标准.因此，在 apache poi 中为条件格式数据栏制作纯色的唯一方法是创建扩展 x14 数据栏条件格式的 XML从头开始.

Apache poi until now only bases on Ecma Office Open XML File Formats Standard. So the only way to make solid color for conditional formatting data bar in apache poi is creating the XML of the extended x14 data bar conditional formatting from scratch.

完整示例:

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFDataBarFormatting;
import org.apache.poi.xssf.usermodel.XSSFConditionalFormattingRule;

import org.apache.poi.ss.util.CellRangeAddress;

import java.io.FileOutputStream;

import java.lang.reflect.Field;

public class ConditionalFormattingDataBars {

 public static void applyDataBars(SheetConditionalFormatting sheetCF, String region, ExtendedColor color) throws Exception {
  CellRangeAddress[] regions = { CellRangeAddress.valueOf(region) };
  ConditionalFormattingRule rule = sheetCF.createConditionalFormattingRule(color);
  DataBarFormatting dbf = rule.getDataBarFormatting();
  dbf.getMinThreshold().setRangeType(ConditionalFormattingThreshold.RangeType.NUMBER);
  dbf.getMinThreshold().setValue(0d);
  dbf.getMaxThreshold().setRangeType(ConditionalFormattingThreshold.RangeType.NUMBER);
  dbf.getMaxThreshold().setValue(100d);

  dbf.setIconOnly(true);

  dbf.setWidthMin(0); //cannot work for XSSFDataBarFormatting, see https://svn.apache.org/viewvc/poi/tags/REL_4_0_1/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFDataBarFormatting.java?view=markup#l57
  dbf.setWidthMax(100); //cannot work for XSSFDataBarFormatting, see https://svn.apache.org/viewvc/poi/tags/REL_4_0_1/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFDataBarFormatting.java?view=markup#l64

  if (dbf instanceof XSSFDataBarFormatting) {
   Field _databar = XSSFDataBarFormatting.class.getDeclaredField("_databar");
   _databar.setAccessible(true);
   org.openxmlformats.schemas.spreadsheetml.x2006.main.CTDataBar ctDataBar =
    (org.openxmlformats.schemas.spreadsheetml.x2006.main.CTDataBar)_databar.get(dbf);
   ctDataBar.setMinLength(0);
   ctDataBar.setMaxLength(100);
  }

  // use extension from x14 namespace to set data bars not using gradient color
  if (rule instanceof XSSFConditionalFormattingRule) {
   Field _cfRule = XSSFConditionalFormattingRule.class.getDeclaredField("_cfRule");
   _cfRule.setAccessible(true);
   org.openxmlformats.schemas.spreadsheetml.x2006.main.CTCfRule ctRule =
    (org.openxmlformats.schemas.spreadsheetml.x2006.main.CTCfRule)_cfRule.get(rule);
   org.openxmlformats.schemas.spreadsheetml.x2006.main.CTExtensionList extList =
    ctRule.addNewExtLst();
   org.openxmlformats.schemas.spreadsheetml.x2006.main.CTExtension ext = extList.addNewExt();
   String extXML =
      "<x14:id"
    + " xmlns:x14=\"http://schemas.microsoft.com/office/spreadsheetml/2009/9/main\">"
    + "{00000000-000E-0000-0000-000001000000}"
    + "</x14:id>";
   org.apache.xmlbeans.XmlObject xlmObject = org.apache.xmlbeans.XmlObject.Factory.parse(extXML);
   ext.set(xlmObject);
   ext.setUri("{B025F937-C7B1-47D3-B67F-A62EFF666E3E}");

   Field _sh = XSSFConditionalFormattingRule.class.getDeclaredField("_sh");
   _sh.setAccessible(true);
   XSSFSheet sheet = (XSSFSheet)_sh.get(rule);
   extList = sheet.getCTWorksheet().addNewExtLst();
   ext = extList.addNewExt();
   extXML =
      "<x14:conditionalFormattings xmlns:x14=\"http://schemas.microsoft.com/office/spreadsheetml/2009/9/main\">"
    + "<x14:conditionalFormatting xmlns:xm=\"http://schemas.microsoft.com/office/excel/2006/main\">"
    + "<x14:cfRule type=\"dataBar\" id=\"{00000000-000E-0000-0000-000001000000}\">"
    + "<x14:dataBar minLength=\"" + 0 + "\" maxLength=\"" + 100 + "\" gradient=\"" + false + "\">"
    + "<x14:cfvo type=\"num\"><xm:f>" + 0 + "</xm:f></x14:cfvo>"
    + "<x14:cfvo type=\"num\"><xm:f>" + 100 + "</xm:f></x14:cfvo>"
    + "</x14:dataBar>"
    + "</x14:cfRule>"
    + "<xm:sqref>" + region + "</xm:sqref>"
    + "</x14:conditionalFormatting>"
    + "</x14:conditionalFormattings>";
   xlmObject = org.apache.xmlbeans.XmlObject.Factory.parse(extXML);
   ext.set(xlmObject);
   ext.setUri("{78C0D931-6437-407d-A8EE-F0AAD7539E65}");
  }

  sheetCF.addConditionalFormatting(regions, rule);
 }

 public static void main(String[] args) throws Exception {
  Workbook workbook = new XSSFWorkbook();

  Sheet sheet = workbook.createSheet("new sheet");

  double[] list = new double[]{0d, 10d, 20d, 30d, 40d, 50d, 60d, 70d, 80d, 90d, 100d};
  for (int i = 0; i < list.length; i++) {
   sheet.createRow(i+1).createCell(0).setCellValue(0d);
   sheet.getRow(i+1).createCell(1).setCellValue(list[i]);
   sheet.getRow(i+1).createCell(2).setCellValue(100d);
  }

  SheetConditionalFormatting sheetCF = sheet.getSheetConditionalFormatting();
  ExtendedColor color = workbook.getCreationHelper().createExtendedColor();
  color.setARGBHex("FF80C279");
  applyDataBars(sheetCF, "B2:B12", color);

  sheet.setColumnWidth(1, 50*256);

  FileOutputStream out = new FileOutputStream("ConditionalFormattingDataBars.xlsx");
  workbook.write(out);
  out.close();
  workbook.close();

 }
}

此代码仅适用于新创建的 XSSFWorkbook.如果 XSSFWorkbook 是从现有工作簿创建的，则这可能包含 org.openxmlformats.schemas.spreadsheetml.x2006.main.CTExtensionList for x14扩展已经.如果是这样，那么必须考虑这些.但这将是一个更加复杂和具有挑战性的项目.

This code will only work properly always for new created XSSFWorkbook. If the XSSFWorkbook was created from an existing workbook, the this could contain org.openxmlformats.schemas.spreadsheetml.x2006.main.CTExtensionList for x14 extensions already. If so, then these must be taken into account. But that would be a much more complex and challenging project.

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