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lt;environments default=developmentgt;
lt;environment id=developmentgt;
lt;transactionManager type=JDBC/gt;
lt;dataSource type=POOLEDgt;
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lt;property name=username value=${username}/gt;
lt;property name=password value=${password}/gt;
lt;/dataSourcegt;
lt;/environmentgt;
lt;/environmentsgt;
lt;mappersgt;
lt;mapper resource=org/mybatis/example/BlogMapper.xml/gt;
lt;/mappersgt;
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