一、连接数据库的driver错误

1、提示：

Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. 
The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.

原因：

　　com.mysql.jdbc.Driver已经不能用

解决办法：

　　url改成 com.mysql.cj.jdbc.Driver

二、连接数据库的url错误

2、提示：

Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: 
Could not get JDBC Connection; nested exception is java.sql.SQLException: 
The server time zone value ‘�й���׼ʱ��’ 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.

解决办法：

在url代码后面添加?serverTimezone=UTC例如：

jdbc:mysql://localhost:3306/ssm_crud?serverTimezone=UTC

 

 

三、缺少依赖导致的错误

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

 

 

 原因：

　　缺少slf4j和ibatis的依赖

解决：

<dependency>  
    <groupId>org.slf4j</groupId> 
    <artifactId>slf4j-nop</artifactId> 
    <version>1.7.2</version> 
</dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.ibatis/ibatis-core -->
<dependency>
    <groupId>org.apache.ibatis</groupId>
    <artifactId>ibatis-core</artifactId>
     <version>3.0</version>
</dependency>        

 

四、逆向工程生成位置路径错误

若运行没有文件生成，相对路径或绝对路径，可以改一下试试