函式y=Asin(ωx+φ)的影象和性質
阿新 • • 發佈:2021-12-14
1.環境配置environments
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myBatis可以配置成適應多種環境,但是每個sqlSessionFactory例項只能選擇一種環境
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myBatis預設事務管理器時jdbc,連線池:pooled
2.屬性properties
外部配置檔案 db.properties:
driver=com.mysql.cj.jdbc.Driver url=jdbc:mysql://localhost:3306/mybatistest?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT username=root password=123456
注意:properties配置必須要在configuration的最上面
引入外部配置檔案:
<configuration> <properties resource="db.properties"/> <environments default="test"> <environment id="test"> <transactionManager type="JDBC"/> <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> <mappers> <mapper resource="com/kakafa/dao/UserMapper.xml"/> </mappers> </configuration>
也可以在其中配置資訊:
<configuration> <properties resource="db.properties"> <property name="name" value="root"/> <property name="pwd" value="123456"/> </properties> <environments default="test"> <environment id="test"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="${driver}"/> <property name="url" value="${url}"/> <property name="username" value="${name}"/> <property name="password" value="${pwd}"/> </dataSource> </environment> </environments> <mappers> <mapper resource="com/kakafa/dao/UserMapper.xml"/> </mappers> </configuration>