Java Apache Poi，如何同时设置背景颜色和边框

Question

一开始，我想说我是一个全新的开发者

我试图生成一个excel表格，其中包含带边框的复制表，并设置背景色，但只针对第一列和第二行

下面是一个正确的例子：correct example

我写了类似的东西，但在结果文件中，彩色单元格并没有边框：（

请告诉我如何同时设置背景色和边框。

import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.IndexedColors;

import java.awt.image.IndexColorModel;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Scanner;

public class Excel {
    public static void main(String[] args) throws IOException {

        Scanner in = new Scanner(System.in);

        System.out.println("enter number of rows: ");
        int x = in.nextInt();
        System.out.println("enter number of columns: ");
        int y = in.nextInt();
        System.out.println("enter name of file: ");
        String fileName = in.next() + ".xls";

        System.out.println("Multiplication table will be created in file: " + fileName);

        createExcelMultiplicationTable(fileName, x, y);

        System.out.println("Process successful executed");
    }

    private static void createExcelMultiplicationTable(String fileName, int x, int y) throws IOException {
        Workbook workbook = new HSSFWorkbook();
        Sheet sheet = workbook.createSheet("multiplicationTable");

        CellStyle backgroundStyle = workbook.createCellStyle();

        backgroundStyle.setFillBackgroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
        backgroundStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);

        CellStyle borderStyle = workbook.createCellStyle();

        borderStyle.setBorderBottom(CellStyle.BORDER_THIN);
        borderStyle.setBottomBorderColor(IndexedColors.BLACK.getIndex());
        borderStyle.setBorderLeft(CellStyle.BORDER_THIN);
        borderStyle.setLeftBorderColor(IndexedColors.BLACK.getIndex());
        borderStyle.setBorderRight(CellStyle.BORDER_THIN);
        borderStyle.setRightBorderColor(IndexedColors.BLACK.getIndex());
        borderStyle.setBorderTop(CellStyle.BORDER_THIN);
        borderStyle.setTopBorderColor(IndexedColors.BLACK.getIndex());

        for (int i = 1; i <= x; i++) {
            Row row = sheet.createRow(i - 1);

            for (int j = 1; j <= y; j++) {
                Cell cell = row.createCell(j - 1);
                cell.setCellValue(i * j);
                cell.setCellStyle(borderStyle);

                if (cell.getRowIndex() == 0 || cell.getColumnIndex() == 0) {
                    cell.setCellStyle(backgroundStyle);
                }
            }
        }

        FileOutputStream out = new FileOutputStream(fileName);
        workbook.write(out);
        out.close();
    }
}

Answer 1

你真正的问题是你有两种风格，一种叫背景风格，另一种叫边界风格。然后将两种样式应用于同一单元格，但一个单元格只能有一种样式，因此不是添加第二种样式，而是用第二种样式覆盖第一种样式

而不是：

    CellStyle backgroundStyle = workbook.createCellStyle();

    backgroundStyle.setFillBackgroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
    backgroundStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);

    CellStyle borderStyle = workbook.createCellStyle();

    borderStyle.setBorderBottom(CellStyle.BORDER_THIN);
    borderStyle.setBottomBorderColor(IndexedColors.BLACK.getIndex());
    borderStyle.setBorderLeft(CellStyle.BORDER_THIN);
    borderStyle.setLeftBorderColor(IndexedColors.BLACK.getIndex());
    borderStyle.setBorderRight(CellStyle.BORDER_THIN);
    borderStyle.setRightBorderColor(IndexedColors.BLACK.getIndex());
    borderStyle.setBorderTop(CellStyle.BORDER_THIN);
    borderStyle.setTopBorderColor(IndexedColors.BLACK.getIndex());

只需创建一个这样的样式：

    CellStyle backgroundStyle = workbook.createCellStyle();

    backgroundStyle.setFillBackgroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
    backgroundStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);

    backgroundStyle.setBorderBottom(CellStyle.BORDER_THIN);
    backgroundStyle.setBottomBorderColor(IndexedColors.BLACK.getIndex());
    backgroundStyle.setBorderLeft(CellStyle.BORDER_THIN);
    backgroundStyle.setLeftBorderColor(IndexedColors.BLACK.getIndex());
    backgroundStyle.setBorderRight(CellStyle.BORDER_THIN);
    backgroundStyle.setRightBorderColor(IndexedColors.BLACK.getIndex());
    backgroundStyle.setBorderTop(CellStyle.BORDER_THIN);
    backgroundStyle.setTopBorderColor(IndexedColors.BLACK.getIndex());

然后将其应用于您的手机：

    Sheet sheet = workbook.createSheet();
    Row row = sheet.createRow(1);
    Cell cell = row.createCell(1);
    cell.setCellStyle(backgroundStyle);

注意：如其他答案所述，FillPattern=SOLID\u前景的背景色被忽略，您必须为该图案设置前景色。这可能会令人困惑，因为您正试图将单元格背景设置为纯色。但是cell background与background color不同Cell background与Fill Pattern相同，它有两种颜色a Foreground Color和a Background Color。这两种颜色基于所选的特定Fill Pattern显示。SOLID_FOREGROUND填充只使用Foreground Color

Answer 2

我找到了解决这个问题的一种方法，但我几乎可以肯定还有其他较短的方法

import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.IndexedColors;

import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Scanner;

public class Excel {
public static void  main(String[] args) throws IOException {

        Scanner in = new Scanner(System.in);

        System.out.println("enter number of rows: ");
        int x = in.nextInt();
        System.out.println("enter number of columns: ");
        int y = in.nextInt();
        System.out.println("enter name of file: ");
        String fileName = in.next() + ".xls";

        System.out.println("Multiplication table will be created in file: " + fileName);

        createExcelMultiplicationTable(fileName, x, y);

        System.out.println("Process successful executed");
    }

    private static void createExcelMultiplicationTable(String fileName, int x, int y) throws IOException {
        Workbook workbook = new HSSFWorkbook();
        Sheet sheet = workbook.createSheet("multiplicationTable");

        for (int i = 1; i <= x; i++) {
            Row row = sheet.createRow(i - 1);

            for (int j = 1; j <= y; j++) {
                Cell cell = row.createCell(j - 1);
                cell.setCellValue(i * j);

                if (cell.getRowIndex() == 0 || cell.getColumnIndex() == 0) {
                    CellStyle Style = workbook.createCellStyle();

                    Style.setFillBackgroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
                    Style.setFillPattern(CellStyle.BIG_SPOTS);
                    Style.setBorderBottom(CellStyle.BORDER_THIN);
                    Style.setBottomBorderColor(IndexedColors.BLACK.getIndex());
                    Style.setBorderLeft(CellStyle.BORDER_THIN);
                    Style.setLeftBorderColor(IndexedColors.BLACK.getIndex());
                    Style.setBorderRight(CellStyle.BORDER_THIN);
                    Style.setRightBorderColor(IndexedColors.BLACK.getIndex());
                    Style.setBorderTop(CellStyle.BORDER_THIN);
                    Style.setTopBorderColor(IndexedColors.BLACK.getIndex());

                    cell.setCellStyle(Style);
                } else {
                    CellStyle Style = workbook.createCellStyle();

                    Style.setBorderBottom(CellStyle.BORDER_THIN);
                    Style.setBottomBorderColor(IndexedColors.BLACK.getIndex());
                    Style.setBorderLeft(CellStyle.BORDER_THIN);
                    Style.setLeftBorderColor(IndexedColors.BLACK.getIndex());
                    Style.setBorderRight(CellStyle.BORDER_THIN);
                    Style.setRightBorderColor(IndexedColors.BLACK.getIndex());
                    Style.setBorderTop(CellStyle.BORDER_THIN);
                    Style.setTopBorderColor(IndexedColors.BLACK.getIndex());

                    cell.setCellStyle(Style);
             }
            }
        }

        FileOutputStream out = new FileOutputStream(fileName);
        workbook.write(out);
        out.close();
  }
}

Answer 3

将backgroundStyle.setFillBackgroundColor(IndexedColors.GREY_50_PERCENT.getIndex());更改为

 backgroundStyle.setFillForegroundColor(IndexedColors.YELLOW.getIndex());

您可以按如下方式设置边框：

        backgroundStyle.setBorderBottom(CellStyle.BORDER_THIN);
        backgroundStyle.setBottomBorderColor(IndexedColors.BLACK.getIndex());
        backgroundStyle.setBorderLeft(CellStyle.BORDER_THIN);
        backgroundStyle.setLeftBorderColor(IndexedColors.BLACK.getIndex());
        backgroundStyle.setBorderRight(CellStyle.BORDER_THIN);
        backgroundStyle.setRightBorderColor(IndexedColors.BLACK.getIndex());
        backgroundStyle.setBorderTop(CellStyle.BORDER_THIN);
        backgroundStyle.setTopBorderColor(IndexedColors.BLACK.getIndex());

这将根据需要为您提供黄色和边框

Answer 4

从POI 3开始。x、 单元格填充颜色设置如下：

CellStyle cs = wb.createCellStyle();
cs.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
cs.setFillPattern(FillPatternType.SOLID_FOREGROUND);