Struts2 導出excel完整版

1、Struts2 配置

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

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

 <!-- 指定文件類型 -->  

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

<!-- 指定顯示的文件名 -->  

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

 <!-- 指定文件輸入流 -->  

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

</result>

</action>

2、BaseAction

//導出
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 {

//不同瀏覽器設置有所不同， 如果這樣設置了還不行，要兼容所有瀏覽器， 可參考”JSP、Struts2下載中文文件名亂碼問題“  
        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;
}

3、Action 調用

public String  exportTaskKey(){

//設置下載文件的名稱
setDownloadFileName("激活碼");

//查詢條件
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 {

//查詢數據
this.paginator = this.taskKeyServiceImpl.queryListPage(pageObject, queryMap);
list = (List<TaskKey>)paginator.getPageableList();

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

//構造並導出
        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);  

//標題，注：可構造字符串數組，動態生成標題
        HSSFCell cell_0_0 = row_0.createCell((short) 0);  
        HSSFRichTextString hts = new HSSFRichTextString("序號");
        cell_0_0.setCellValue(hts);  
        
        HSSFCell cell_0_1 = row_0.createCell((short) 1);  
        hts = new HSSFRichTextString("禮包");
        cell_0_1.setCellValue(hts); 
        
        HSSFCell cell_0_2 = row_0.createCell((short) 2);  
        hts = new HSSFRichTextString("激活碼");
        cell_0_2.setCellValue(hts);
        
        HSSFCell cell_0_3 = row_0.createCell((short) 3);  
        hts = new HSSFRichTextString("生成批號");
        cell_0_3.setCellValue(hts);
        
        HSSFCell cell_0_4 = row_0.createCell((short) 4);  
        hts = new HSSFRichTextString("開始時間");
        cell_0_4.setCellValue(hts);
        
        HSSFCell cell_0_5 = row_0.createCell((short) 5);  
        hts = new HSSFRichTextString("結束時間");
        cell_0_5.setCellValue(hts);
        
        HSSFCell cell_0_6 = row_0.createCell((short) 6);  
        hts = new HSSFRichTextString("生成時間");
        cell_0_6.setCellValue(hts);
                
        //填充數據 ， 跟上方的標題要保持一致
        //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);  
            
        }  
          
        //將HSSFWorkbook對象輸出到字節數組輸出流  
        ByteArrayOutputStream os = new ByteArrayOutputStream();  
        try {
wb.write(os);  
os.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}  
        //構造字節數字輸入流返回  
        excelFile = new ByteArrayInputStream(os.toByteArray());  

        return "success";  
    }