public boolean exportDataToCSV(List dataList,			LinkedHashMap<String, String> showTitle, String fileName,			HttpServletRequest request, HttpServletResponse response)			throws UnsupportedEncodingException {		boolean flag = false;		if (response != null && request != null) {			//获取浏览器类型			final String userAgent = request.getHeader("USER-AGENT");			// 输出流			OutputStream out = null;			// 待导出的数据			StringBuffer exportDate = new StringBuffer();			if (fileName == null) {				fileName = "";			}			SimpleDateFormat formatter = new SimpleDateFormat(					"yyyy-MM-dd HH:mm:ss");			Date curDate = new Date(System.currentTimeMillis());// 获取当前时间			fileName = fileName + formatter.format(curDate) + ".csv";			if (userAgent.contains("MSIE")) {// IE浏览器				fileName = URLEncoder.encode(fileName, "UTF8");			} else if (userAgent.contains("Mozilla")) {// google,火狐浏览器				fileName = new String(fileName.getBytes(), "ISO8859-1");			} else {				fileName = URLEncoder.encode(fileName, "UTF8");// 其他浏览器			}			// 提示框设置			response.reset(); // reset the response			// response.setCharacterEncoding("UTF-8");			 response.setContentType("application/octet-stream");			response.setHeader("content-disposition", "attachment; filename=\""					+ fileName + "\"");			try {				// 获得显示字段(实体属性)				List<String> fields = new ArrayList<String>();				// 表头(实体中文名称)				if (showTitle != null && showTitle.size() > 0) {					StringBuffer tableHead = new StringBuffer();					for (Map.Entry<String, String> entry : showTitle.entrySet()) {						tableHead.append(entry.getValue()).append(",");						fields.add(entry.getKey());					}					// 添加表头					exportDate.append(tableHead);					exportDate.append("\n");				}				// 列表数据				if (dataList != null && dataList.size() > 0) {					Object obj = dataList.get(0);					// 获得实体类的set/get方法					Method methods[] = obj.getClass().getDeclaredMethods();					// 将显示字段的get方法存入集合					List<Method> invokeMethods = new ArrayList<Method>();					for (int j = 0; j < fields.size(); j++) {						for (int i = 0; i < methods.length; i++) {							String methodName = methods[i].getName();							String tmpMethodName = methodName.substring(3,									methodName.length());							if (fields.get(j).toString().trim().toUpperCase()									.equals(tmpMethodName.toUpperCase())									&& methodName.indexOf("set") != 0									&& methodName.indexOf("get") == 0) {								invokeMethods.add(methods[i]);							}						}					}					// 获取数据					for (int i = 0; i < dataList.size(); i++) {						obj = dataList.get(i);						for (int j = 0; j < invokeMethods.size(); j++) {							Method method = invokeMethods.get(j);							Object tmpObj = method.invoke(obj);							if (tmpObj == null) {								tmpObj = "";							}							exportDate.append(tmpObj.toString());							exportDate.append(",");						}						exportDate.append("\n");					}				}				// System.out.println("============" + exportDate.toString());				out = response.getOutputStream();				byte[] bytes = exportDate.toString().getBytes("GBK");				out.write(bytes);				out.flush();				// 关闭输出流				if (out != null) {					exportDate.delete(0, exportDate.length());				}				flag = true;				log.info("文件导出完毕！");			} catch (Exception e) {				log.error(e);				e.printStackTrace();				log.error("导出数据时出现异常");			} finally {				if (out != null) {					try {						out.close();					} catch (Exception e) {						e.printStackTrace();					}				}			}		}else{			new NullPointerException("HttpServletRequest Or HttpServletResponse Is Null !");		}		return flag;	}


//调用

@RequestMapping(value = "http://www.mamicode.com/exportDealerManager")	public void exportQueryData(HttpServletRequest request, HttpServletResponse response, FlDealer flDealer) throws Exception {		String fileName="名称";		ExportDataUtil edu = new ExportDataUtil();		List<FlDealer> dealerList = flDealerManagerService.getDealerList(flDealer);		LinkedHashMap <String, String> showColumn = new LinkedHashMap <String, String>();		//获取配置文件路径		StringBuffer filePath = new StringBuffer();		filePath.append(this.getClass().getResource("/"));		filePath.append("exportClassConfig.xml");		XMLOperUtil xmlUtil = new XMLOperUtil(filePath.substring(5).toString());		List elements = xmlUtil.getElements("/Classes/DealerManagerDownload/property", false);		//获取需要导出的字段		for(int i= 0; i<elements.size();i++){			Element el = (Element) elements.get(i);			showColumn.put(el.attributeValue("ename"),el.attributeValue("cname"));		}		edu.exportDataToCSV(dealerList, showColumn, fileName, request, response);	}