CSV文件导出2

public void exportCSVFile(

	HttpServletResponse response, ResultSet rs,String fileName,String headers) throws SQLException {

		OutputStream o = null;

		try {
//			String headers = "用户名, 操作时间, 操作模块, 操作内容";// 标题
			headers += "\n";
			List<Log> logList = new ArrayList<Log>();

			Log logs = null;
			while (rs.next()) {
				logs = new Log();
				logs.setUser(rs.getString(1));
				logs.setDatetime(rs.getString(2));
				logs.setModule(rs.getString(3));
				logs.setContent(rs.getString(4));
				logList.add(logs);
			}

			if (logList.size() > 0) {

				for (int i = 0; i < logList.size(); i++) {

					Log logs1 = logList.get(i);

					headers += logs1.getUser() + ",";
					headers += logs1.getDatetime() + ",";
					headers += logs1.getModule() + ",";
					headers += logs1.getContent();

					headers += "\n";

				}
				Date d = new Date();
				SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
				String dateNowStr = sdf.format(d);
//				String fileNames = "导出操作日志数据" + dateNowStr+".csv";
				String fileNames = fileName + dateNowStr+".csv";

				System.out.println(fileNames);
				response.setContentType("application/download;charset=GBK");

				response.setContentType("Content-type:application/vnd.ms-excel;charset=GBK");

				response.setHeader("Content-Disposition", "attachment;filename="
						+ new String(fileNames.getBytes("utf-8"), "iso8859-1"));// 设置头信息
				o = response.getOutputStream();
				o.write(headers.toString().getBytes("GBK"));

			}

		} catch (IOException e) {

			e.printStackTrace();

		} finally {

			if (o != null) {

				try {

					o.close();

				} catch (IOException e) {

					// TODO Auto-generatedcatch block

					e.printStackTrace();

				}

			}

		}

	}

　　

String headers = "用户名, 操作时间, 操作模块, 操作内容";// 标题
String fileName = "导出操作日志数据";
exportCSVFile(response, rs, fileName, headers);

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前几天，做的导出csv文件，有个bug,如果服，务器是linux，部署到服务器上就不能导出，后来查出，是导出到了服务器，没有下载到浏览器，

用这个方法，要注意，字节流和字符流的冲突问题；
response.getOutputStream();

PrintWriter out = response.getWriter();

可以将提示写在前台；只用字节流