function postExcelFile(params, url) { //params是post请求需要的参数,url是请求url地址
  var form = document.createElement("form");
     form.style.display = 'none';
     form.action = url;
     form.method = "post";
    document.body.appendChild(form);

    for(var key in params){
      var input = document.createElement("input");
        input.type = "hidden";
        input.name = key;
        input.value = params[key];
        form.appendChild(input);
    }

    form.submit();
    form.remove();
}

 

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