string(268) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=java%E7%9A%84%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F%E9%85%8D%E7%BD%AE%E4%BD%9C%E7%94%A8%E8%AF%A6%E8%A7%A3 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
java的环境变量配置作用详解
