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Java实现Excel合并单元格
2023-06-15 20:11:53 深夜i     --     --
Java Excel POI库

在Excel中，有时我们需要将单元格合并成一个大的单元格以显示数据的层次结构。在Java中，通过使用Apache POI库可以轻松实现Excel单元格的操作。下面是一个简单的Java程序，实现Excel合并单元格操作：



import java.io.File;


import java.io.FileOutputStream;


import org.apache.poi.ss.usermodel.CellStyle;


import org.apache.poi.ss.usermodel.IndexedColors;


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.XSSFFont;


import org.apache.poi.xssf.usermodel.XSSFRow;


import org.apache.poi.xssf.usermodel.XSSFSheet;


import org.apache.poi.xssf.usermodel.XSSFWorkbook;


public class ExcelMergeCellsExample {


  public static void main(String[] args) {


    // Create a workbook


    XSSFWorkbook workbook = new XSSFWorkbook();


    // Create a sheet


    XSSFSheet sheet = workbook.createSheet("Employee Data");


    // Create a row and set some data


    XSSFRow row = sheet.createRow(0);


    XSSFCell cell0 = row.createCell(0);


    cell0.setCellValue("Emp ID");


    XSSFCell cell1 = row.createCell(1);


    cell1.setCellValue("Emp Name");


    XSSFCell cell2 = row.createCell(2);


    cell2.setCellValue("Salary");


    // Merge cells


    sheet.addMergedRegion(0, 0, 1, 2);


    sheet.getRow(0).getCell(0).setCellStyle(createHeaderCellStyle(workbook));


    // Write the output to a file


    try {


      FileOutputStream fileOut = new FileOutputStream(new File("employee.xlsx"));


      workbook.write(fileOut);


      fileOut.flush();


      fileOut.close();


    } catch (Exception e) {


      e.printStackTrace();


    }


  }


  private static XSSFCellStyle createHeaderCellStyle(XSSFWorkbook workbook) {


    XSSFCellStyle style = workbook.createCellStyle();


    style.setFillForegroundColor(new XSSFColor(new java.awt.Color(68, 114, 196))));


    style.setFillPattern(CellStyle.SOLID_FOREGROUND);


    XSSFFont font = workbook.createFont();


    font.setFontName("Arial");


    font.setFontHeightInPoints((short) 14);


    font.setColor(IndexedColors.WHITE.getIndex());


    font.setBold(true);


    style.setFont(font);


    style.setAlignment(CellStyle.ALIGN_CENTER);


    style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);


    return style;


  }


}

该程序创建了一个名为“Employee Data”的Excel工作表，并将第一行的前两个单元格合并为一个单元格，并设置了样式。

  
  

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