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js 实现文件下载/文件导出。

1. POST方式进行文件导出;

  // url 下载URL
  // fileName 下载文件名称
  function exportFile(url, fileName) {
    let xhr = new XMLHttpRequest();
    xhr.open("POST", url);
    xhr.responseType = "blob";
    xhr.onload = () => {
      let ctx = xhr.response;
      let blob = new Blob([ctx]);
      if ("msSaveOrOpenBlob" in navigator) {//兼容IE
        window.navigator.msSaveOrOpenBlob(blob, fileName);
      } else {
        let aLink = document.createElement("a");
        aLink.download = fileName;
        aLink.style.display = "none";
        aLink.href = URL.createObjectURL(blob);
        document.body.appendChild(aLink);
        aLink.click();
        document.body.removeChild(aLink);
      }
    };
    xhr.send();
  }

使用方法:exportFile(url,fileName);

 

使用Angular方式进行导出:

class ExportEvent {
      constructor( private http:HttpClient ){}
        // url 下载URL
        // fileName 下载文件名称
      exportFile(url,fileName){
            this.http.request("POST",url,{},{responseType:"blob"}).pipe()
       .subscribe( (res)
=>{ let blob = new Blob([res]); if ("msSaveOrOpenBlob" in navigator) {//兼容IE window.navigator.msSaveOrOpenBlob(blob, fileName); } else { let aLink = document.createElement("a"); aLink.download = fileName; aLink.style.display = "none"; aLink.href = URL.createObjectURL(blob); document.body.appendChild(aLink); aLink.click(); document.body.removeChild(aLink); } }, (error)=>{ let reader = new FileReader(); reader.onload = (e)=>{ if(e && e["target"]){ let errorMsg = JSON.parse(e["target"]["result"]); if(errorMsg && errorMsg["code"]){ console.log("有报错,出错了。。。。。"); } } } //error.error的值是一个Blob对象 reader.readAsText(error.error); }
       ); } }

 

2. GET方式进行文件导出;

// url 下载路径
window.location = url;

 

posted @ 2020-08-08 21:35  元芳啊  阅读(1400)  评论(0编辑  收藏  举报