/**
*js层
*/
downLoad = function(){
var params = {
"value" : $("#id").val()
};
window.open("/down/downLoad?value="+$("#id").val());//不可以使用ajax请求，因为流无法传输到前端，需要另打开界面。路径+传输到controller的值
};
/**
*controller层
*/
@RequestMapping(value = "/downLoad", method=RequestMethod.POST,produces="text/html;charset=UTF-8" )
public ModelAndView downLoad(int value) throws Exception {
List<String> downList = new ArrayList<String>();
List<String> headList = new ArrayList<String>();
HttpServletResponse response = getResponse();
response.reset();
response.setCharacterEncoding("UTF-8");
response.setContentType("application/octet-stream");
//String downloadFileName =new String("下载".getBytes("utf-8"),"iso-8859-1");//一般是utf-8但是ie下载时，文件名会乱码
String downloadFileName =new String("下载".getBytes("gb2312"),"iso-8859-1");//IE11下文件名不会乱码
// downloadFileName += new String(bi.getBatchName().getBytes("utf-8"),"iso-8859-1")+"-";
downloadFileName += new String(bi.getBatchName().getBytes("gb2312"),"iso-8859-1")+"-";
downloadFileName += new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());//在文件名中加入下载的年月日时分秒
response.setHeader("Content-Disposition", "attachment; filename=\""+ downloadFileName + ".csv\"");
ServletOutputStream sos = response.getOutputStream();
boolean isSuccess=CsvUtils.exportCsv(sos ,headList,downList);
return null;//不需要返回前端任何内容
}
/**
*exportCsv方法
*/
public static boolean exportCsv(ServletOutputStream outputStream,List<String> headList, List<String> dataList){
boolean isSucess=false;
try {
StringBuilder sb = new StringBuilder();
if(headList!=null && !headList.isEmpty()){
for(String data : headList){
sb.append(data);
sb.append("\r");//在这里需要将数据一行一行展示
}
}
if(dataList!=null && !dataList.isEmpty()){
for(String data : dataList){
sb.append(data);
sb.append("\r");
}
}
outputStream.write(sb.toString().getBytes("GBK"));//写入输出流
outputStream.flush();//缓存流
isSucess=true;
} catch (Exception e) {
e.printStackTrace();
isSucess=false;
}finally{
if(outputStream!=null){
try {
outputStream.close();//一定要将流关闭，否则日志中会出错
outputStream=null;
} catch (IOException e) {
e.printStackTrace();
}
}
}
return isSucess;
}