# 1.Configuration类 1.1 配置文件mybatis-config.xml <?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 resource="db.properties"></properties> <settings> <setting name="logImpl" value="STDOUT_LOGGING"/> <setting name="cacheEnabled" value="true"/> </settings> <environments default="development"> <environment id="development"> <transactionManager type="JDBC"/>...