Java 导出数据？

Java code

    // 导出表数据    public String exportTable() throws IOException {        HttpServletResponse response = ServletActionContext.getResponse();                //response.setCharacterEncoding("UTF-8");        // 取得输出流        OutputStream out = response.getOutputStream();        BufferedOutputStream bos = new BufferedOutputStream(out);                String tableName = request.getParameter("msg");// 从页面上获取所有的表名和其标题        System.out.println(tableName);        String[] tableNames = StringUtils.split(tableName, ",");        System.out.println("======================================="                + tableNames.length);        for (int i = 0; i < tableNames.length; i++) {            System.out.println(tableNames[i]);        }        //取得exportBackUP方法的返回值        String backUpString = this.sjkbfService.exportBackUp(tableNames);        System.out.println("写入的文件："+backUpString);                String fileDate = new SimpleDateFormat("yyyyMMddHHmmss")                .format(new Date());                        String fileName = fileDate + ".backUp";                response.addHeader("Content-Disposition", "attachment;filename=" + fileName); // filename指定默认的名字                //OutputStream bos = response.getOutputStream();        //OutputStream bos = new BufferedOutputStream(out);        try {                        bos.write(backUpString.getBytes("UTF-8"));                         System.out.println("写入成功");                    } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        bos.close();        out.close();        response.flushBuffer();// 强行将响应缓存中的内容发送到目的地                return null;    }

后台也打印了写入成功
System.out.println("写入成功");

就是要弹出一个下载框，显示下载路径？？没有弹出框？？？

[解决办法]
.backUp的文件类型，浏览器无法识别。需要设置文件的MIME类型
[解决办法]
1、在代码中加入：
response.addHeader("Content-Type", "application/octet-stream");



2、或者在WEB服务器的配置中添加文件后缀名与MIME类型的映射。如tomcat在\apache-tomcat-6.0.26\conf\web.xml的<mime-mapping>结点中配置。

[解决办法]
你介个貌似只是将数据写到文件中。
使用SmartUpload试下
[解决办法]
http://topic.csdn.net/u/20120316/17/ff3335d2-91a5-4baa-b41e-2413d15fc67e.html?8720
[解决办法]

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