BufferedOutputStream下载

本文主要是介绍BufferedOutputStream下载，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

例：

public void demoexport(HttpServletRequest request,HttpServletResponse response){
OutputStream os = null;
SyspleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");  //设置日期格式
//sdf.format(new date());  
int random = (int) (Math.random() * 1000) //获取0-1000之间的随机数，然后强转为整形
String fileName = "交易导出_"+sdf.format(new date())+"_"+random+".csv"; 
request.setCharacterEncoding("UTF-8"); //设置输入流的格式
os = response.getOutputStrem(); //取得输出流
response.reset(); //清空输出流
response.setHeader("Content-disposition","attachment;filename="+new String(fileName.getBytes("GBK"),"ISO8859-1"));//设置导出文件的文件名
response..setContentType("application/msexcel;charset=UTF-8"); //定义输出类型
list...     //这是获取要下载的内容的集合,因为每个人的都不同，所以没写，大家懂就行
BufferedOutputStream bos = new BufferedOutputStrem(os);  //相当于一个缓冲，最后还是会到outputstream里面去的，详情请见             http://blog.sina.com.cn/s/blog_735065f90100pv3g.html
String title = "代理商编号,代理商名称,商户编号,商户名称,商户类别\n";
bos.write(title.getBytes("GBK"))
Iterator<Map<String, Object>> it = list.iterator();
while(it.hasNext()){
Map<String, Object> map =it.next();
StringBuffer content = new StringBuffer();
content.append("\t").append(StringUtil.ifEmptyThen(map.get("agent_no"), "无")).append(",");
content.append("\t").append(StringUtil.ifEmptyThen(map.get("agent_name"), "无")).append(",");
content.append("\t").append(StringUtil.ifEmptyThen(map.get("merchant_no"), "无")).append(",");
content.append("\t").append(StringUtil.ifEmptyThen(map.get("merchant_short_name"), "无")).append(",");
content.append("\t").append(StringUtil.ifEmptyThen(map.get("type_name"), "无")).append("\n");
bos.write(content.toString().getBytes("GBK"));
}bos.flush();
bos.close();
os.close();
}