-
坑1:错误原因是typo,将SqlMapConfig.xml中的 写成了
- 错误信息如下:
- org.apache.ibatis.exceptions.PersistenceException:
- Error building SqlSession
- The error may exist in SQL Mapper Configuration
- Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias ‘POLLED’.
- 可见错误可能出现在SQL的映射配置中。
- 错误信息如下:
-
然后出现Client does not support authentication protocol requested by server; consider upgrading MySQL client的错误
- 在MySQL命令行中输入ALTER USER ‘root’@‘localhost’ IDENTIFIED WITH mysql_native_password BY ‘password’;这可能是因为高版本的加密方式不同导致的。
-
然后出现Unknown initial character set index ‘255’ received from server. Initial clie…的错误,这是编码格式导致的,在连接url中指定编码即可 jdbc:mysql://localhost:3306/eesy?characterEncoding=utf8
-
最终配置如下
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<!--mybatis的主配置文件-->
<configuration>
<!--配置环境-->
<environments default="mysql">
<!--配置mysql的环境-->
<environment id="mysql">
<!--配置事务的类型-->
<transactionManager type="JDBC"></transactionManager>
<!--配置数据源(连接池)-->
<dataSource type="POOLED">
<!--配置连接数据库的基本信息-->
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/eesy?characterEncoding=utf8"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</dataSource>
</environment>
</environments>
<!--指定配置文件的位置,映射配置文件指的是每个dao独立的配置文件-->
<mappers>
<mapper resource="com/itheima/dao/IUserDao.xml"></mapper>
</mappers>
</configuration>