wx.downloadFile({ url: this.resume, success: function(res) { var filePath = res.tempFilePath, index1 = filePath.lastIndexOf('.'), index2 = filePath.length, suffix = filePath.substring(index1 + 1, index2) console.log('filePath', filePath) wx.openDocument({ filePath: filePath, fileType: suffix, success: function(res) { console.log('打开文档成功') }, fail: (e) => { console.log(e) } }) }, fail: function(res) { console.log(res) console.log('文件下载失败') }, complete: function(res) {} })