string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=java%E9%85%8D%E7%BD%AE%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F%E5%90%8E%E6%97%A0%E6%B3%95%E8%BF%90%E8%A1%8C => Failed to connect to 14.116.215.7 port 38225: Connection refused"
java配置环境变量后无法运行
