• mysql8.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=true&characterEncoding=utf8
      driver-class-name = com.mysql.jdbc.Driver
    2. 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=false
      driver-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.<init>(ConnectionImpl.java:455) ~[mysql-connector-java-8.0.14.jar:8.0.14]
        at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240) ~[mysql-connector-java-8.0.14.jar:8.0.14]
        at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199) ~[mysql-connector-java-8.0.14.jar:8.0.14]
        at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1464) ~[druid-1.0.31.jar:1.0.31]
        at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1529) ~[druid-1.0.31.jar:1.0.31]
        at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2109) ~[druid-1.0.31.jar:1.0.31]
    Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: 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 sun.reflect.GeneratedConstructorAccessor29.newInstance(Unknown Source) ~[na:na]
  • 相关阅读:
    mysql性能优化之索引优化
    提高mysql千万级大数据SQL查询优化30条经验(Mysql索引优化注意)
    MySQL高级-索引优化
    MySQL性能调优——索引详解与索引的优化
    通过force index了解的MySQL查询的性能优化
    Mysql 日期型,索引查询的问题
    mysql按日期分组(group by)查询统计的时候,没有数据补0的解决办法。
    SQL中Group By的使用
    GROUP BY 与聚合函数 使用注意点
    MYSQL GROUP BY Optimization
  • 原文地址:https://www.cnblogs.com/smartbear/p/11569988.html
Copyright © 2020-2023  润新知