poi实现Excel导出

最近做了一个导出Excel的小功能，以前没接触过，现在分享下自己的代码，想让各位帮忙看看有啥地方可以优化，也方便自己以后查阅...

首先是excelAction的代码:

/**
 * excelAction
 * @author zhaoxz
 *
 */
@Controller("excelAction")
@Scope("prototype")
public class ExcelAction extends BaseAction {
    /**
     * 
     */
    private static final long serialVersionUID = -4596726723629076906L;
    private static final Logger logger = Logger.getLogger(ExcelAction.class);
    @Resource
    private CkdjService ckdjSrv;
    private ExportExcel ex = new ExportExcel();
    private Ckdj ckdj;
    private String exportBatch;
    private String fileName;
    private InputStream excelStream;
    

    public String execute() throws Exception {
        return SUCCESS;
    }
    
    /**
     * 将workbook转换为InputStream
     * @param workbook
     * @param fileName
     */
    private void workbookInputStream(HSSFWorkbook workbook, String fileName) {
        try {
            this.setFileName(URLEncoder.encode(fileName, "UTF-8"));
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            workbook.write(baos);
            baos.flush();
            byte[] aa = baos.toByteArray();
            this.excelStream = new ByteArrayInputStream(aa, 0, aa.length);
            baos.close();
        } catch (Exception e) {
            logger.error("转换失败！", e);
        }
    }

    /**************************** get set **************************************/

    /**
     * 获取文件流
     * @return
     */
    public InputStream getExcelStream() {
        try {
            String[] headers =  
            { "序号", "名称", "规格", "序列号", "数量", "单位", "出库人"};
            ckdj = ckdjSrv.findById(ckdj);
            System.out.println(getExportBatch());
            HSSFWorkbook workbook = ex.exportExcel("出库列表", headers, ckdj ,exportBatch);
            this.workbookInputStream(workbook, fileName);
        } catch (Exception e) {
            logger.error("获取文件流失败！", e);
        }
        return excelStream;
    }

    public void setExcelStream(InputStream excelStream) {
        this.excelStream = excelStream;
    }

    public Ckdj getCkdj() {
        return ckdj;
    }

    public void setCkdj(Ckdj ckdj) {
        this.ckdj = ckdj;
    }
    
    public String getFileName() {
        return fileName;
    }

    public void setFileName(String fileName) {
        this.fileName = fileName;
    }

    public void setCkdjSrv(CkdjService ckdjSrv) {
        this.ckdjSrv = ckdjSrv;
    }

    public String getExportBatch() {
        return exportBatch;
    }

    public void setExportBatch(String exportBatch) {
        this.exportBatch = exportBatch;
    }

}

接着是struts2.xml文件

<action name="exportExcel" class="excelAction">
   <result name="success" type="stream">
         <param name="contentType">application/vnd.ms-excel</param>
         <param name="inputName">excelStream</param>
         <param name="contentDisposition">attachment;filename="${fileName}.xls"</param>
         <param name="bufferSize">1024</param> 
   </result>
</action>

然后是ExportExcel.java类的代码：

/**
 * 导出Excel文档
 * @author zhaoxz
 *
 */
@SuppressWarnings("unchecked")
public class ExportExcel {
    
    /**
     * 创建workbook
     * @param title
     * @param headers
     * @param ckdj
     */
    public HSSFWorkbook exportExcel(String title,String[] headers,Ckdj ckdj,String exportBatch){
        
        //声明一个工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        //生成一个表格
        HSSFSheet sheet = workbook.createSheet(title);
        //设置表格默认列宽为15个字节
        sheet.setDefaultColumnWidth(15);
        //生成一个样式
        HSSFCellStyle style = workbook.createCellStyle();
        //设置样式
        style.setFillForegroundColor(HSSFColor.WHITE.index);
        style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        //生成一个字体
        HSSFFont font = workbook.createFont();
        font.setColor(HSSFColor.BLACK.index);
        font.setFontHeightInPoints((short)14);
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        //把字体应用到当前样式
        style.setFont(font);
        
        // 生成并设置另一个样式  
        HSSFCellStyle style2 = workbook.createCellStyle();  
        style2.setFillForegroundColor(HSSFColor.WHITE.index);  
        style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
        style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
        style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
        style2.setBorderRight(HSSFCellStyle.BORDER_THIN);  
        style2.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);  
        style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  
        // 生成另一个字体  
        HSSFFont font2 = workbook.createFont();  
        font2.setFontHeightInPoints((short)12);
        font2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // 把字体应用到当前的样式  
        style2.setFont(font2);
        
        // 生成并设置另一个样式  
        HSSFCellStyle style3 = workbook.createCellStyle();  
        style3.setFillForegroundColor(HSSFColor.WHITE.index);  
        style3.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
        style3.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
        style3.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
        style3.setBorderRight(HSSFCellStyle.BORDER_THIN);  
        style3.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        style3.setAlignment(HSSFCellStyle.ALIGN_LEFT);  
        style3.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  
        // 生成另一个字体  
        HSSFFont font3 = workbook.createFont();  
        font3.setFontHeightInPoints((short)12);
        font3.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // 把字体应用到当前的样式  
        style3.setFont(font3);
        
        // 生成并设置另一个样式   样式4
        HSSFCellStyle style4 = workbook.createCellStyle();  
        style4.setFillForegroundColor(HSSFColor.WHITE.index);  
        style4.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
        style4.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
        style4.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
        style4.setBorderRight(HSSFCellStyle.BORDER_THIN);  
        style4.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        style4.setAlignment(HSSFCellStyle.ALIGN_CENTER);  
        style4.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  
        // 生成另一个字体  
        HSSFFont font4 = workbook.createFont();  
        font4.setFontHeightInPoints((short)11);
        // 把字体应用到当前的样式  
        style4.setFont(font4);
        
        //产生表格标题行
        HSSFRow row = sheet.createRow(0);
        HSSFCell cel = row.createCell(0);
        cel.setCellStyle(style);
        cel.setCellValue("天维讯达无线电设备检测（北京）有限责任公司");
        HSSFCell c2 = row.createCell(1);
        c2.setCellStyle(style);
        HSSFCell c3 = row.createCell(2);
        c3.setCellStyle(style);
        HSSFCell c4 = row.createCell(3);
        c4.setCellStyle(style);
        HSSFCell c5 = row.createCell(4);
        c5.setCellStyle(style);
        HSSFCell c6 = row.createCell(5);
        c6.setCellStyle(style);
        HSSFCell c7 = row.createCell(6);
        c7.setCellStyle(style);
        //合并单元格
        sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 6));
        
        //2行
        HSSFRow row2 = sheet.createRow(1);
        HSSFCell cel2l = row2.createCell(0);
        cel2l.setCellStyle(style2);
        if(exportBatch.equals("0")){
            cel2l.setCellValue("出库单");
        }else{
            cel2l.setCellValue("出库单(第"+ckdj.getBatch()+"批)");
        }
        HSSFCell rc2 = row2.createCell(1);
        rc2.setCellStyle(style);
        HSSFCell rc3 = row2.createCell(2);
        rc3.setCellStyle(style);
        HSSFCell rc4 = row2.createCell(3);
        rc4.setCellStyle(style);
        HSSFCell rc5 = row2.createCell(4);
        rc5.setCellStyle(style);
        HSSFCell rc6 = row2.createCell(5);
        rc6.setCellStyle(style);
        HSSFCell rc7 = row2.createCell(6);
        rc7.setCellStyle(style);
        sheet.addMergedRegion(new CellRangeAddress(1, 1, 0, 6)); //合并单元格
        
        //3行
        HSSFRow rowhead = sheet.createRow(2);
        sheet.addMergedRegion(new CellRangeAddress(2, 2, 0, 4)); //合并单元格
        //3行左
        HSSFCell cel3l = rowhead.createCell(0);
        cel3l.setCellStyle(style3);
        cel3l.setCellValue("所属项目："+ckdj.getProjectNumber());
        //3行右
        HSSFCell cel3r = rowhead.createCell(5);
        cel3r.setCellStyle(style2);
        cel3r.setCellValue("出库单号："+ckdj.getReleasingNumber());
        HSSFCell cel27 = rowhead.createCell(6);
        cel27.setCellStyle(style2);
        sheet.addMergedRegion(new CellRangeAddress(2, 2, 5, 6));
        
        HSSFRow rowbody = sheet.createRow(3);
        for (int i = 0; i < headers.length; i++) {
            HSSFCell cell = rowbody.createCell(i);
            cell.setCellStyle(style2);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }
        
        //遍历集合数据，产生数据行
        Iterator it = ckdj.getGoods().iterator();
        int index = 3;
        while (it.hasNext()) {
            index++;
            row = sheet.createRow(index);
            CkdjDetailed t = (CkdjDetailed)it.next();
            
            //创建单元格
            HSSFCell cell0 = row.createCell(0);
            cell0.setCellStyle(style4);
            cell0.setCellValue(t.getNum());
            
            HSSFCell cell1 = row.createCell(1);
            cell1.setCellStyle(style4);
            cell1.setCellValue(t.getEqName());
            
            HSSFCell cell2 = row.createCell(2);
            cell2.setCellStyle(style4);
            cell2.setCellValue(t.getEqStandard());
            
            HSSFCell cell3 = row.createCell(3);
            cell3.setCellStyle(style4);
            cell3.setCellValue(t.getEqSernumber());
            
            HSSFCell cell4 = row.createCell(4);
            cell4.setCellStyle(style4);
            cell4.setCellValue(t.getEqNums());
            
            HSSFCell cell5 = row.createCell(5);
            cell5.setCellStyle(style4);
            cell5.setCellValue(t.getEqUnits());
            
            HSSFCell cell6 = row.createCell(6);
            cell6.setCellStyle(style4);
            cell6.setCellValue("");
        }
        HSSFRow last1 = sheet.createRow(index+3);
        HSSFCell lcel1 = last1.createCell(4);
        lcel1.setCellValue("送货人：");
        HSSFRow last2 = sheet.createRow(index+4);
        HSSFCell lcel2 = last2.createCell(4);
        lcel2.setCellValue("送货时间：");
        HSSFRow last3 = sheet.createRow(index+5);
        HSSFCell lcel3 = last3.createCell(4);
        lcel3.setCellValue("收货人：");
        HSSFRow last4 = sheet.createRow(index+6);
        HSSFCell lcel4 = last4.createCell(4);
        lcel4.setCellValue("收货时间：");
        return workbook;
    }
    
    /**
     * 创建仓库workbook
     * @param title
     * @param headers
     * @param rkdjs
     * @return
     */
    public HSSFWorkbook exportWareExcel(String title,String[] headers,List<Rkdj> rkdjs){
        
        //声明一个工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        //生成一个表格
        HSSFSheet sheet = workbook.createSheet(title);
        //设置表格默认列宽为15个字节
        sheet.setDefaultColumnWidth(15);
        //生成一个样式
        HSSFCellStyle style = workbook.createCellStyle();
        //设置样式
        style.setFillForegroundColor(HSSFColor.WHITE.index);
        style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        //生成一个字体
        HSSFFont font = workbook.createFont();
        font.setColor(HSSFColor.BLACK.index);
        font.setFontHeightInPoints((short)14);
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        //把字体应用到当前样式
        style.setFont(font);
        
        // 生成并设置另一个样式  
        HSSFCellStyle style2 = workbook.createCellStyle();  
        style2.setFillForegroundColor(HSSFColor.WHITE.index);  
        style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
        style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
        style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
        style2.setBorderRight(HSSFCellStyle.BORDER_THIN);  
        style2.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);  
        style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  
        // 生成另一个字体  
        HSSFFont font2 = workbook.createFont();  
        font2.setFontHeightInPoints((short)12);
        font2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // 把字体应用到当前的样式  
        style2.setFont(font2);
        
        // 生成并设置另一个样式  
        HSSFCellStyle style3 = workbook.createCellStyle();  
        style3.setFillForegroundColor(HSSFColor.WHITE.index);  
        style3.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
        style3.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
        style3.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
        style3.setBorderRight(HSSFCellStyle.BORDER_THIN);  
        style3.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        style3.setAlignment(HSSFCellStyle.ALIGN_LEFT);  
        style3.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  
        // 生成另一个字体  
        HSSFFont font3 = workbook.createFont();  
        font3.setFontHeightInPoints((short)12);
        font3.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // 把字体应用到当前的样式  
        style3.setFont(font3);
        
        // 生成并设置另一个样式   样式4
        HSSFCellStyle style4 = workbook.createCellStyle();  
        style4.setFillForegroundColor(HSSFColor.WHITE.index);  
        style4.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
        style4.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
        style4.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
        style4.setBorderRight(HSSFCellStyle.BORDER_THIN);  
        style4.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        style4.setAlignment(HSSFCellStyle.ALIGN_CENTER);  
        style4.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  
        // 生成另一个字体  
        HSSFFont font4 = workbook.createFont();  
        font4.setFontHeightInPoints((short)11);
        // 把字体应用到当前的样式  
        style4.setFont(font4);
        
        //列头
        HSSFRow rowbody = sheet.createRow(0);
        for (int i = 0; i < headers.length; i++) {
            HSSFCell cell = rowbody.createCell(i);
            cell.setCellStyle(style2);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }
        
        //遍历集合数据，产生数据行
        int index = 0;
        Iterator it = rkdjs.iterator();
        while (it.hasNext()) {
            index++;
            HSSFRow row = sheet.createRow(index);
            Rkdj t = (Rkdj) it.next();
            //创建单元格
            HSSFCell cell0 = row.createCell(0);
            cell0.setCellStyle(style4);
            cell0.setCellValue(t.getJoinTime());
            
            HSSFCell cell1 = row.createCell(1);
            cell1.setCellStyle(style4);
            cell1.setCellValue(t.getJoinNumbers());
            
            HSSFCell cell2 = row.createCell(2);
            cell2.setCellStyle(style4);
            cell2.setCellValue(t.getEquipmentName());
            
            HSSFCell cell3 = row.createCell(3);
            cell3.setCellStyle(style4);
            cell3.setCellValue(t.getStandard());
            
            HSSFCell cell4 = row.createCell(4);
            cell4.setCellStyle(style4);
            cell4.setCellValue(t.getSeriesNumber());
            
            HSSFCell cell5 = row.createCell(5);
            cell5.setCellStyle(style4);
            cell5.setCellValue(t.getLocation());
            
            HSSFCell cell6 = row.createCell(6);
            cell6.setCellStyle(style4);
            cell6.setCellValue(t.getAmount());
            
            HSSFCell cell7 = row.createCell(7);
            cell7.setCellStyle(style4);
            cell7.setCellValue(t.getStock());
            
            HSSFCell cell8 = row.createCell(8);
            cell8.setCellStyle(style4);
            cell8.setCellValue(t.getComments());
        }
        return workbook;
    }
}

这样基本就没什么问题了，本人小白，希望能得到更多的指导!在此多谢了....