1、Struts2 配置

<action name="exportConsume" class="consumeStatAction" method="exportConsume" >

<result name="success" type="stream"> 

 <!-- 指定文件类型 -->  

<param name="contentType">application/vnd.ms-excel</param>  

<!-- 指定显示的文件名 -->  

<param name="contentDisposition">attachment;filename="${downloadFileName}"</param>  

 <!-- 指定文件输入流 -->  

<param name="inputName">excelFile</param>  

</result>

</action>

//导出
protected InputStream excelFile;  

protected String downloadFileName; 

//生成set 和 get方法

public InputStream getExcelFile() {

return excelFile;

}

public void setExcelFile(InputStream excelFile) {

this.excelFile = excelFile;

}

public String getDownloadFileName() {
        String downloadFileName = (this.downloadFileName + DatetimeUtils.formatDate(new Date()) + ".xls");  
        try {

//不同浏览器设置有所不同， 如果这样设置了还不行，要兼容所有浏览器， 可参考”JSP、Struts2下载中文文件名乱码问题“  
        downloadFileName = URLEncoder.encode(downloadFileName, "UTF-8"); 
            //downloadFileName = new String(downloadFileName.getBytes("utf-8"),  "iso-8859-1");  
        } catch (UnsupportedEncodingException e) {  
            e.printStackTrace();  
        }  
        return downloadFileName;  
}

public void setDownloadFileName(String downloadFileName) {
this.downloadFileName = downloadFileName;
}

public String  exportTaskKey(){

//设置下载文件的名称
setDownloadFileName("激活码");

//查询条件
Map<String,String> queryMap = new HashMap<String,String>();
String sTime = getRequest().getParameter("startTime");
String eTime = getRequest().getParameter("endTime");
String bNo = getRequest().getParameter("batchNo");
String tName = getRequest().getParameter("taskName");

queryMap.put("startTime", DatetimeUtils.date2DateTime(sTime, DatetimeUtils.START_TIME));
queryMap.put("endTime", DatetimeUtils.date2DateTime(eTime, DatetimeUtils.START_TIME));
queryMap.put("batchNo", bNo);
queryMap.put("taskName", tName);
Integer appId = this.loadCurAppId();
queryMap.put("appId", appId.toString());
queryMap.put("queryType", ConfigureConstants.QUERY_TYPE_EXPORT);

Paginator pageObject = new Paginator();
List<TaskKey> list = new ArrayList<TaskKey>();
try {

//查询数据
this.paginator = this.taskKeyServiceImpl.queryListPage(pageObject, queryMap);
list = (List<TaskKey>)paginator.getPageableList();

} catch (BusinessException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

//构造并导出
        HSSFWorkbook wb = new HSSFWorkbook();  
        HSSFSheet sheet_0 = wb.createSheet();  
        sheet_0.setDefaultColumnWidth((short)20);
        sheet_0.setDefaultRowHeight((short)15);
        
        HSSFRow row_0 = sheet_0.createRow(0);  

//标题，注：可构造字符串数组，动态生成标题
        HSSFCell cell_0_0 = row_0.createCell((short) 0);  
        HSSFRichTextString hts = new HSSFRichTextString("序号");
        cell_0_0.setCellValue(hts);  
        
        HSSFCell cell_0_1 = row_0.createCell((short) 1);  
        hts = new HSSFRichTextString("礼包");
        cell_0_1.setCellValue(hts); 
        
        HSSFCell cell_0_2 = row_0.createCell((short) 2);  
        hts = new HSSFRichTextString("激活码");
        cell_0_2.setCellValue(hts);
        
        HSSFCell cell_0_3 = row_0.createCell((short) 3);  
        hts = new HSSFRichTextString("生成批号");
        cell_0_3.setCellValue(hts);
        
        HSSFCell cell_0_4 = row_0.createCell((short) 4);  
        hts = new HSSFRichTextString("开始时间");
        cell_0_4.setCellValue(hts);
        
        HSSFCell cell_0_5 = row_0.createCell((short) 5);  
        hts = new HSSFRichTextString("结束时间");
        cell_0_5.setCellValue(hts);
        
        HSSFCell cell_0_6 = row_0.createCell((short) 6);  
        hts = new HSSFRichTextString("生成时间");
        cell_0_6.setCellValue(hts);
                
        //填充数据 ， 跟上方的标题要保持一致
        //List<Article> articleList = this.listArticles();  
        for(int i=0; i<list.size(); i++){  
        TaskKey info = list.get(i);
       
            HSSFRow row = sheet_0.createRow(i+1);  
            HSSFCell cell_0 = row.createCell((short) 0);  
            cell_0.setCellValue(i+1);  
            
            HSSFCell cell_1 = row.createCell((short) 1);  
            cell_1.setCellValue(info.getTaskId());
            
            HSSFCell cell_2 = row.createCell((short) 2); 
            hts = new HSSFRichTextString(info.getBarCode());
            cell_2.setCellValue(hts);
            
            HSSFCell cell_3 = row.createCell((short) 3);  
            hts = new HSSFRichTextString(info.getBatchNo());
            cell_3.setCellValue(hts);  
            
            HSSFCell cell_4 = row.createCell((short) 4);  
            hts = new HSSFRichTextString(DatetimeUtils.formatDate(info.getStartTime()));
            cell_4.setCellValue(hts);
            
            
            HSSFCell cell_5 = row.createCell((short) 5);  
            hts = new HSSFRichTextString(DatetimeUtils.formatDate(info.getEndTime()));
            cell_5.setCellValue(hts);
            
            HSSFCell cell_6 = row.createCell((short) 6); 
            hts = new HSSFRichTextString(DatetimeUtils.formatDate(info.getCreateTime()));
            cell_6.setCellValue(hts);  
            
        }  
          
        //将HSSFWorkbook对象输出到字节数组输出流  
        ByteArrayOutputStream os = new ByteArrayOutputStream();  
        try {
wb.write(os);  
os.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}  
        //构造字节数字输入流返回  
        excelFile = new ByteArrayInputStream(os.toByteArray());  

        return "success";  
    }

Struts2 导出excel完整版