前端GET/POST请求下载文件多种方式代码示例

export const download = (data, projectId) => {
  return request({
    url: BaseUrl + '/xxx/xxx/xxx',
    headers: {
      "Project-Id": projectId,
      httpWhite: true,
    },
    responseType: "blob",//文件流
    method: 'post',
    data
  })
}

<el-button size="small" type="primary" class="downLoadTemplate" @click="downloadFile(row)">
    <i class="iconfont yun-xiazai"></i>
    <span class="first">下载数据模板</span>
</el-button>
//点击下载
const downloadFile(row){
  const params = {
    需要传递的参数:'xxxx',
    id:row.id,  //示例,
  }  
  download(params, this.projectIds).then((res) => {
    if (res.status === 200) {
      this.downloadDataTemplate(res);
    }
  });
}

//下载数据模板
downloadDataTemplate(res) {
  if (!res.data) {
    return;
  }
  const fileName = decodeURIComponent(
    res.headers["content-disposition"].split("filename=")[1]
  );
  const blob = new Blob([res.data], {
    type: "application/vnd.openxmlformats-  officedocument.spreadsheetml.sheet;charset=utf-8",
  });
  const downloadElement = document.createElement("a");
  const href = window.URL.createObjectURL(blob); // 创建下载的链接
  downloadElement.href = href;
  // 文件名中有中文 则对文件名进行转码
  downloadElement.download = fileName; // 下载后文件名
  document.body.appendChild(downloadElement);
  downloadElement.click(); // 点击下载
  document.body.removeChild(downloadElement); // 下载完成移除元素
  window.URL.revokeObjectURL(href); // 释放blob对象
},

const downError = `BaseUrl+/xxx/xxx/xxxx?${this.tokenHeader}=${getToken()}&projectId=${this.projectId}&spaceId=${this.spaceId}`;

window.open(downError, "_self");//调用window方法

export const exportPersonnel = (params) => request({
  url: BaseUrl + '/exportxxx/xxxx',
  headers: {
    "Project-Id": params.projectId,
  },
  method: 'get',
  responseType: 'blob',		//文件流方法
  params,
})

// 导出
exportcustomer() {
  let downStr = { ...this.params };
  exportPersonnel(downStr).then((r) => {
    if (r.status === 200) {
      //获取下载文件名 
      const fileName = decodeURIComponent(
        r.headers["content-disposition"].split("filename=")[1]
      );
      // 创建 a 元素
      const link = document.createElement('a');
      const href = window.URL.createObjectURL(r.data)//创建下载链接
      link.href = href;// 设置下载链接的 URL
      link.style.display = "none";

      link.download = fileName; // 下载后文件名
      document.body.appendChild(link);
      link.click(); // 点击下载
      document.body.removeChild(link); // 下载完成移除元素
      window.URL.revokeObjectURL(href); // 释放blob对象
    }
  });
},