報(bào)錯(cuò)信息:
WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

查看翻譯顯示是數(shù)據(jù)庫連接出的問題
解決方案:設(shè)置useSSL=false文章來源:http://www.zghlxwxcb.cn/news/detail-714147.html
String url = "jdbc:mysql://127.0.0.1/leaning?useSSL=false";
//在最后加上?useSSL=false
這樣就解決了。文章來源地址http://www.zghlxwxcb.cn/news/detail-714147.html
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