string(296) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%85%8D%E7%BD%AE%E5%AE%8C%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8Fjavac%E8%BF%98%E6%98%AF%E6%89%BE%E4%B8%8D%E5%88%B0%E6%96%87%E4%BB%B6 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
配置完环境变量javac还是找不到文件
