poi - Excel

POI can use the interface to read and write functions operate Microsoft office suite of tools by JAVA

1. poi need to rely maven:

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.17</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.apache.poi/poi -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>3.17</version>
</dependency>

• Test code

public class TestExcelStyle {
    @Test
    public void testExcelStyle() throws IOException {
        XSSFWorkbook workbook = new XSSFWorkbook();
        CellRangeAddress rangeAddress = new CellRangeAddress(2,2,2,4);

        //创建样式
        XSSFCellStyle style = workbook.createCellStyle();
        style.setAlignment(HorizontalAlignment.CENTER);
        style.setVerticalAlignment(VerticalAlignment.CENTER);

        //设置背景
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        style.setFillForegroundColor(new XSSFColor(new Color(35,120,24)));
        //创建字体
        XSSFFont font = workbook.createFont();
        font.setFontHeightInPoints((short) 16);

        style.setFont(font);

        XSSFSheet sheet = workbook.createSheet("helloWorld1");
        sheet.addMergedRegion(rangeAddress);

        //创建行
        XSSFRow row = sheet.createRow(2);
        //创建单元格
        XSSFCell cell = row.createCell(2, CellType.STRING);
        cell.setCellStyle(style);
        cell.setCellValue("1234");

        //output
        FileOutputStream outputStream = new FileOutputStream(new File("E:\\workspace\\poiLearn\\3.xlsx"));
        workbook.write(outputStream);
        workbook.close();
        outputStream.close();
    }

}