Java POI 导出Excel

利用POI导出Excel，要导出的数据组织成List<Object[]> 

需要添加POI包，xmlbeans、dom4j这两个也需要添加，不然会报错

调用的时候，要设置表头等信息，调用下面的setxxx方法就好了

package com;

import java.io.FileOutputStream;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
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 org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelOperation
{
    /**
     * Excel导出文件夹地址
     */
    private String m_sExportPath;
    
    /**
     * Excel文件的名称
     */
    private String m_sFileName;
    
    /**
     * Excel文件标题
     */
    private String m_sTitle;
    
    /**
     * 占的列数
     */
    private int m_iColspan;
    
    /**
     * 左边提示信息
     */
    private String m_sLeftTips;
    
    /**
     * 表头
     */
    private List<Object[]> m_listHeader;
    
    /**
     * 构造函数
     * @param sExportPath 导出文件夹地址
     * @param sFileName 文件名
     * @param iColspan 占得列数
     */
    public ExcelOperation(String sExportPath, String sFileName, int iColspan)
    {
        setM_sExportPath(sExportPath);
        setM_sFileName(sFileName);
        setM_iColspan(iColspan - 1);
    }
    
    /**
     * 导出Excel
     * <功能详细描述>
     * @param listHeader 列头
     * @param listContent 数据内容
     * @param sTitle 标题
     * @param sLeftTips 左边的提示信息
     * @return
     * @throws Exception
     * @see [类、类#方法、类#成员]
     */
    public boolean ExportToExcel(List<Object[]> listHeader, List<Object[]> listContent)
    
    {
        try
        {
            //1.创建工作簿
            Workbook wkb;
            if (StringUtils.isNotEmpty(m_sFileName) && m_sFileName.endsWith("xls"))
            {
                //HSSFWorkbook是用来导出Excel2003格式的
                wkb = new HSSFWorkbook();
            }
            else if (m_sFileName.endsWith("xlsx"))
            {
                //XSSFWorkbook是用来导出Excel2007格式的
                wkb = new XSSFWorkbook();
            }
            else
            {
                return false;
            }
            
            //2.创建页
            Sheet sheet = wkb.createSheet();
            //设置单元格格式 居中
            CellStyle cellStyle = wkb.createCellStyle();
            cellStyle.setAlignment(CellStyle.ALIGN_CENTER);
            
            //设置标题
            if (StringUtils.isNotEmpty(m_sTitle))
            {
                Row titleRow = sheet.createRow(0);
                //这里是合并单元格，四个参数代表 （开始行，结束行，开始列，结束列）
                CellRangeAddress range = new CellRangeAddress(0, 0, 0, m_iColspan);
                sheet.addMergedRegion(range);
                Cell cell = titleRow.createCell(0);
                cell.setCellStyle(cellStyle);
                cell.setCellValue(m_sTitle);
            }
            
            //设置左边提示信息
            if (StringUtils.isNotEmpty(m_sLeftTips))
            {
                Row leftRow = sheet.createRow(1);
                leftRow.createCell(0).setCellValue(m_sLeftTips);
                
            }
            
            //设置列头
            if (listHeader != null && listHeader.size() > 0)
            {
                for (int i = 0; i < listHeader.size(); i++)
                {
                    Row headerRow = sheet.createRow(2 + i);
                    Object[] oArrayHeader = listHeader.get(i);
                    
                    int j = 0;
                    for (Object oHeader : oArrayHeader)
                    {
                        oHeader = oHeader != null ? oHeader : "";
                        headerRow.createCell(0 + j).setCellValue(oHeader.toString());
                        j++;
                    }
                    
                }
            }
            
            //设置内容
            if (listContent != null && listContent.size() > 0)
            {
                //正文数据起始行
                int iContentStartRow = 0;
                iContentStartRow = listHeader == null ? 2 : listHeader.size() + 2;
                
                for (int i = 0; i < listContent.size(); i++)
                {
                    Row contentRow = sheet.createRow(iContentStartRow + i);
                    Object[] oArrayContent = listContent.get(i);
                    
                    for (int j = 0; j < oArrayContent.length; j++)
                    {
                        Object oContent = oArrayContent[j] != null ? oArrayContent[j] : "";
                        contentRow.createCell(j).setCellValue(oContent.toString());
                    }
                }
            }
            
            //将文件存到指定位置
            FileOutputStream outputStream = new FileOutputStream(m_sExportPath + "\\" + m_sFileName);
            wkb.write(outputStream);
            outputStream.close();
            return true;
        }
        catch (Exception e)
        {
            return false;
        }
    }
    
    public String getM_sFileName()
    {
        return m_sFileName;
    }
    
    public void setM_sFileName(String m_sFileName)
    {
        this.m_sFileName = m_sFileName;
    }
    
    public String getM_sExportPath()
    {
        return m_sExportPath;
    }
    
    public void setM_sExportPath(String m_sExportPath)
    {
        this.m_sExportPath = m_sExportPath;
    }
    
    public String getM_sTitle()
    {
        return m_sTitle;
    }
    
    public void setM_sTitle(String m_sTitle)
    {
        this.m_sTitle = m_sTitle;
    }
    
    public String getM_sLeftTips()
    {
        return m_sLeftTips;
    }
    
    public void setM_sLeftTips(String m_sLeftTips)
    {
        this.m_sLeftTips = m_sLeftTips;
    }
    
    public List<Object[]> getM_listHeader()
    {
        return m_listHeader;
    }
    
    public void setM_listHeader(List<Object[]> m_listHeader)
    {
        this.m_listHeader = m_listHeader;
    }
    
    public int getM_iColspan()
    {
        return m_iColspan;
    }
    
    public void setM_iColspan(int m_iColspan)
    {
        this.m_iColspan = m_iColspan;
    }
}