读取页面传的数据

　　从流中读取传递的参数:

　　

//一个例子:

@RequestMapping(value = "/exportSeller",method = {RequestMethod.POST,RequestMethod.GET})
public String exportSeller(HttpServletRequest request, HttpServletResponse response) throws BusinessException, IOException {

    StringBuffer params = new StringBuffer();
    String line = null;
    try {
        BufferedReader reader = request.getReader();
        while((line = reader.readLine()) != null) {
            params.append(line);
        }
    }catch(Exception e) {
        System.out.println(e.toString());
    }

    Map<String,String> map = new HashMap<String,String>();
    String[] pa = params.toString().split("\&");
    for (String s:pa) {
        String[] strings = s.split("\=");
        if (strings.length > 1){
            map.put(strings[0],strings[1]);
        }else{
            map.put(strings[0],"");
        }
    }

    ExcelParam param = new ExcelParam();
    param.setCashCode(map.get("cashCode"));
    param.setApplyEndDate(map.get("applyEndDate"));
    param.setApplyStartDate(map.get("applyStartDate"));
    param.setAuditEndDate(map.get("auditEndDate"));
    param.setAuditStartDate(map.get("auditStartDate"));
    param.setCashDownAmt(map.get("cashDownAmt"));
    param.setCashUpAmt(map.get("cashUpAmt"));
    param.setExportStatus(map.get("exportStatus"));
    param.setUserName(map.get("userName"));

    // 获取workbook对象
    Workbook workbook = excelService.exportSheetBySeller(param);
    // 判断数据
    if(workbook == null) {
        return "fail";
    }
    // 设置excel的文件名称
    String excelName = "服务机构-帐务信息";
    // 重置响应对象
    response.reset();
    // 当前日期，用于导出文件名称
    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
    String dateStr = excelName+"-"+sdf.format(new Date())+".xls";
    // 指定下载的文件名--设置响应头
    response.setHeader("Content-Disposition", "attachment;Filename=" + URLEncoder.encode(dateStr, "UTF-8"));
    //response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(dateStr, "UTF-8")+".xls");
    response.setContentType("application/vnd.ms-excel;charset=UTF-8");
    response.setHeader("Pragma", "no-cache");
    response.setHeader("Cache-Control", "no-cache");
    response.setDateHeader("Expires", 0);
    // 写出数据输出流到页面
    try {
        OutputStream output = response.getOutputStream();
        BufferedOutputStream bufferedOutPut = new BufferedOutputStream(output);
        workbook.write(bufferedOutPut);
        bufferedOutPut.flush();
        bufferedOutPut.close();
        output.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return "success";
}