Tomcat启动时执行到Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource...时卡住
2019-06-02 10:29
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原因有以下几个:
1.电脑的mysql没有启动,打开电脑后台启动,找到服务,然后启动mysql,可能设置为手动启动了。
2.数据库配置信息检查一下,看看有没有错误,有可能多了个空格,或者名称写错。
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=utf-8&useSSL=falsejdbc.driverClass=com.mysql.jdbc.Driver jdbc.user=root jdbc.password=123456
配置文件中错误,好好检查,mybatis配置文件中的映射地址,namespace中的地址,或者SSM整合中,datasource中的地址信息填写
4.用可视化数据操作工具,检查一下,是否可以连接,看看排除密码错误的问题。
5.jar包版本的问题
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency>
6.在配置文件中url的格式问题:useSSL=false
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=utf-8&useSSL=false
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