mybatis log 打印sql 语句

<configuration debug="true">
添加一下几行

<logger name="com.ibatis" level="DEBUG" />    
<logger name="com.ibatis.common.jdbc.SimpleDataSource" level="DEBUG" />    
<logger name="com.ibatis.common.jdbc.ScriptRunner" level="DEBUG" />    
<logger name="com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate" level="DEBUG" />    
<logger name="java.sql.Connection" level="DEBUG" />    
<logger name="java.sql.Statement" level="DEBUG" />    
<logger name="java.sql.PreparedStatement" level="DEBUG" />