MySQL 8.x 新版本JDBC连接方式
1.旧版本，MySQL Connector/J 5.x 版本的连接方式： url = jdbc:mysql://localhost:3306/thrcloud_db01?useUnicode=truecharacterEncoding=utf8 driver-class-name = com.mysql.jdbc.Driver 2、MySQL 8.x新版本，MySQL Connector/J 6.x之后
1.旧版本，MySQL Connector/J 5.x 版本的连接方式：
url = jdbc:mysql://localhost:3306/thrcloud_db01?useUnicode=true&characterEncoding=utf8driver-class-name = com.mysql.jdbc.Driver
2、MySQL 8.x新版本，MySQL Connector/J 6.x之后 的连接方式：url = jdbc:mysql://localhost:3306/thrcloud_db01?serverTimezone=UTC&characterEncoding=utf8&useUnicode=true&useSSL=falsedriver-class-name = com.mysql.cj.jdbc.Driver
注意：新版mysql驱动的url必须设置时区，即serverTimezone=UTC，否则会报如下错误：
Java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support. at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129) ~[mysql-connector-java-8.0.14.jar:8.0.14] at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) ~[mysql-connector-java-8.0.14.jar:8.0.14] at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) ~[mysql-connector-java-8.0.14.jar:8.0.14] at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) ~[mysql-connector-java-8.0.14.jar:8.0.14] at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73) ~[mysql-connector-java-8.0.14.jar:8.0.14] at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:76) ~[mysql-connector-java-8.0.14.jar:8.0.14] at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:835) ~[mysql-connector-java-8.0.14.jar:8.0.14] at com.mysql.cj.jdbc.ConnectionImpl.
