但是,我失败了,我真的不知道问题是什么.我用Google搜索了好几个小时,仍然无法找到正确的方法来设置颜色.

以下是我写的代码：

import java.awt.Color;
import java.io.File;
import java.io.FileOutputStream;

import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class TestColor {
    public static void main(String[] args) {
        File f = new File("test.xlsx");
        XSSFWorkbook wb = new XSSFWorkbook();
        XSSFSheet sheet = wb.createSheet();
        XSSFRow row = sheet.createRow(0);
        XSSFCell cell = row.createCell(0);
        cell.setCellValue("no blue");

        // set the color of the cell
        XSSFCellStyle style = wb.createCellStyle();
        XSSFColor myColor = new XSSFColor(Color.BLUE);
        style.setFillForegroundColor(myColor);
        style.setFillBackgroundColor(myColor);
        cell.setCellStyle(style); // this command seems to fail

        try {
            FileOutputStream fos = new FileOutputStream(f);
            wb.write(fos);
            wb.close();
            fos.flush();
            fos.close();
        }catch(Exception e){
            e.printStackTrace();
        }
    }
}

这是最终的结果.

如何将单元格的颜色设置为蓝色？

我从https://poi.apache.org/download.html开始使用poi-bin-3.12-20150511.zip