poi操作excel合并单元格，java合并excel单元格

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
/**
 * @ClassName 类名：ExcelDemo6
 * @Author作者: hzh
 * @Date时间：2018/12/4 14:56
 * 合并单元格
 **/
public class ExcelDemo6 {
    public static void main(String[] args) throws Exception {
        Workbook wb = new HSSFWorkbook();
        Sheet sheet = wb.createSheet("hi sheet");
        Row row = sheet.createRow(1);
        Cell cell = row.createCell(1);
        cell.setCellValue("测试合并单元格");
        sheet.addMergedRegion(new CellRangeAddress(1, 2, 1, 3));
        FileOutputStream fileOutputStream = new FileOutputStream("D://file//合并.xls");
        wb.write(fileOutputStream);
        wb.close();
    }
}