mybatis配置文件解读javaAHOPEL的博客-

最常用： <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration         PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "https://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!--配置环境--> <environments default="mysql"> <!--配置MySQL环境--> <environment id="mysql"> <!--配置事物--> <transactionManager type="JDBC"></transactionManager> <!--配置连接池--> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/db1"/> <property name="username" value="root"/> <property name="password" value="root"/> </dataSource> </environment> </environments> <!--配置文件映射位置--> <mappers> <mapper resource="cn/lzc/mapper/UserMapper.xml"></mapper> </mappers> </configuration> 

改动后，灵活性更强

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration         PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "https://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!--    properties用来定义连接属性，可把连接信息定义在外面--> <properties resource="connection.properties"></properties> <!--    起别名，识别的时候不会区分大小写--> <typeAliases> <!--        单个定义别名--> <typeAlias alias="user" type="cn.lzc.domain.User"/> <!--       批量定义别名,扫描整个包下的类，别名为类名，首字母大小写都可以--> <package name="cn.lzc.domain"/> </typeAliases> <!--配置环境--> <environments default="mysql"> <!--配置MySQL环境--> <environment id="mysql"> <!--配置事物--> <transactionManager type="JDBC"></transactionManager> <!--配置连接池--> <dataSource type="POOLED"> <property name="driver" value="${driver}"/> <property name="url" value="${url}"/> <property name="username" value="${username}"/> <property name="password" value="${password}"/> </dataSource> </environment> </environments> <!--配置文件映射位置--> <mappers> <mapper resource="cn/lzc/mapper/UserMapper.xml"></mapper> </mappers> </configuration>