如果要在ReactJs中显示和下载PDF，可以使用此方法

axios.get(exportUrl, {responseType:'blob'})
        .then(response => {
            // Create blob link to download
            var blob = new Blob([response.data], { type: 'application/pdf' });

            var URL = window.URL || window.webkitURL;
            const url = window.URL.createObjectURL(blob);
            const link = document.createElement('a');
            link.target   = '_blank';
            link.href = url;
            link.setAttribute(    //if you just want to preview pdf and dont want download delete this three lines 
               'download',
               `Factor.pdf`,
             );
        
            // Append to html link element page
            document.body.appendChild(link);
        
            // Start download
            link.click();
        
            // Clean up and remove the link
            link.parentNode.removeChild(link);
            URL.revokeObjectURL(url);

        })
    }