string(277) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=u%E7%9B%98%E9%87%8C%E9%9D%A2%E7%9A%84%E6%96%87%E4%BB%B6%E6%80%8E%E4%B9%88%E8%BD%AC%E6%8D%A2%E6%A0%BC%E5%BC%8F => Failed to connect to 101.89.166.210 port 38089: Connection refused"
u盘里面的文件怎么转换格式
