File download

如果spring boot的写法是我在另外一个文章, 返回的response其实是一个Blob, 这一点要记住

          this.axios.get(url, { responseType: 'blob', timeout: 0 }).then(response => {
              // response is Blob <-------
                const url = window.URL.createObjectURL(response)
                const a = document.createElement('a')
                a.style.display = 'none'
                a.href = url
                a.setAttribute('download','file.xlsx')
                document.body.appendChild(a)
                a.click()
                document.body.removeChild(a);
                window.URL.revokeObjectURL(url);
          });