使用Apache POI库导出Excel文件

package com.comtop.nio;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
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.CellRangeAddress;

public class Test {

    /**
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {
      HSSFWorkbook objHSSFWorkBook = new HSSFWorkbook();
      HSSFSheet objHSSFSheet = objHSSFWorkBook.createSheet("变更单汇总表");
      int i = objHSSFSheet.addMergedRegion(new CellRangeAddress(0,0,0,40));
      HSSFRow objHSSFRow = objHSSFSheet.createRow(i);
      HSSFCell objHSSFCell = objHSSFRow.createCell(i);
      objHSSFCell.setCellValue(new HSSFRichTextString("变更单汇总"));
      HSSFRow objContentRow = objHSSFSheet.createRow(1);
      int iCount = 0;
      createCell(objContentRow, iCount,"编号");