struts下载

用于struts2下载

private InputStream excelStream;

private String excelFileName;

/**

* Struts下载 */

@Action(value = "downloadTemplate", results = { @Result(name = "success", type = "stream", params = {

"contentType", "application/vnd.ms-excel", "inputName", "excelStream", "bufferSize", "1024",

"contentDisposition", "attachment;filename=${excelFileName}" }) })

public String downloadTemplate() {

if (log.isDebugEnabled()) {

log.debug("downloadTemplate()  =====>>  start ");

}

String rootPath = ServletActionContext.getServletContext().getRealPath("/");

String templatePosition = rootPath + "/template/相关的上传模板.xls";

Map<String, Object> leaveStuInfoTemplateMap = examApplyStuInfoUploadServic.downloadTemplate(templatePosition);

excelStream = (InputStream) leaveStuInfoTemplateMap.get("stream");

excelFileName = (String) leaveStuInfoTemplateMap.get("excelName") + ".xls";

if (log.isDebugEnabled()) {

log.debug("downloadTemplate()  <<=====  end ");

}

return SUCCESS;

}

/*

* 下载excel模板的service中的方法

*/

@Override

public Map<String, Object> downloadTemplate(String templatePosition) {

if (log.isDebugEnabled()) {

log.debug(" downloadTemplate(String templatePosition) ====>> start ");

}

Map<String, Object> returnMap = new HashMap<String, Object>();

InputStream is = null;

ByteArrayInputStream bis = null;

try {

is = new FileInputStream(templatePosition);

HSSFWorkbook wb = new HSSFWorkbook(is);

ByteArrayOutputStream os = new ByteArrayOutputStream();

try {

wb.write(os);

} catch (IOException e) {

e.printStackTrace();

}

byte[] content = os.toByteArray();

bis = new ByteArrayInputStream(content);

returnMap.put("stream", bis);

returnMap.put("excelName", new String("相关模板上传模板".getBytes(),

"ISO8859-1"));

if (log.isDebugEnabled()) {

log.debug(" downloadTemplate(String templatePosition) <<==== end ");

}

return returnMap;

} catch (Exception e) {

log.error("异常信息：" + e.getMessage());

if (log.isDebugEnabled()) {

log.debug(" downloadTemplate(String templatePosition) <<==== end ");

}

}

return null;

}