Question

POI生成excel表格，如何合并单元格

Answer 1

import java.io.FileOutputStream; import java.io.IOException; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFCellStyle; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.hssf.util.Region; public class ExcelTest { /** * @param args */ public static void main(String[] args) throws IOException { try { HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet sheet = wb.createSheet("new sheet"); HSSFCellStyle style = wb.createCellStyle(); // 样式对象 style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平 HSSFRow row = sheet.createRow((short) 0); HSSFRow row2 = sheet.createRow((short) 1); sheet.addMergedRegion(new Region(0, (short) 0, 1, (short) 0)); HSSFCell ce = row.createCell((short) 0); ce.setEncoding(HSSFCell.ENCODING_UTF_16);// 中文处理 ce.setCellValue("项目\\日期"); // 表格的第一行第一列显示的数据 ce.setCellStyle(style); // 样式，居中 int num = 0; for (int i = 0; i < 9; i++) { // 循环9次，每一次都要跨单元格显示 // 计算从那个单元格跨到那一格 int celln = 0; int celle = 0; if (i == 0) { celln = 0; celle = 1; } else { celln = (i * 2); celle = (i * 2 + 1); } // 单元格合并 // 四个参数分别是：起始行，起始列，结束行，结束列 sheet.addMergedRegion(new Region(0, (short) (celln + 1), 0, (short) (celle + 1))); HSSFCell cell = row.createCell((short) (celln + 1)); cell.setCellValue("merging" + i); // 跨单元格显示的数据 cell.setCellStyle(style); // 样式 // 不跨单元格显示的数据，如：分两行，上一行分别两格为一格，下一行就为两格，“数量”，“金额” HSSFCell cell1 = row2.createCell((short) celle); HSSFCell cell2 = row2.createCell((short) (celle + 1)); cell1.setEncoding(HSSFCell.ENCODING_UTF_16); cell1.setCellValue("数量"); cell1.setCellStyle(style); cell2.setEncoding(HSSFCell.ENCODING_UTF_16); cell2.setCellValue("金额"); cell2.setCellStyle(style); num++; } // 在后面加上合计百分比 // 合计 在最后加上，还要跨一个单元格 sheet.addMergedRegion(new Region(0, (short) (2 * num + 1), 0, (short) (2 * num + 2))); HSSFCell cell = row.createCell((short) (2 * num + 1)); cell.setEncoding(HSSFCell.ENCODING_UTF_16); cell.setCellValue("合计"); cell.setCellStyle(style); HSSFCell cell1 = row2.createCell((short) (2 * num + 1)); HSSFCell cell2 = row2.createCell((short) (2 * num + 2)); cell1.setEncoding(HSSFCell.ENCODING_UTF_16); cell1.setCellValue("数量"); cell1.setCellStyle(style); cell2.setEncoding(HSSFCell.ENCODING_UTF_16); cell2.setCellValue("金额"); cell2.setCellStyle(style); // 百分比 同上 sheet.addMergedRegion(new Region(0, (short) (2 * num + 3), 0, (short) (2 * num + 4))); HSSFCell cellb = row.createCell((short) (2 * num + 3)); cellb.setEncoding(HSSFCell.ENCODING_UTF_16); cellb.setCellValue("百分比"); cellb.setCellStyle(style); HSSFCell cellb1 = row2.createCell((short) (2 * num + 3)); HSSFCell cellb2 = row2.createCell((short) (2 * num + 4)); cellb1.setEncoding(HSSFCell.ENCODING_UTF_16); cellb1.setCellValue("数量"); cellb1.setCellStyle(style); cellb2.setEncoding(HSSFCell.ENCODING_UTF_16); cellb2.setCellValue("金额"); cellb2.setCellStyle(style); FileOutputStream fileOut = new FileOutputStream("workbook.xls"); wb.write(fileOut); fileOut.close(); System.out.print("OK"); } catch (Exception ex) { ex.printStackTrace(); } } }