string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=pom%E6%98%AF%E6%8C%87%E4%BB%80%E4%B9%88%E5%AD%98%E5%82%A8%E5%99%A8 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
pom是指什么存储器
