ibatis，log4j打印sql的配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
    <appender name="IBatis" class="org.apache.log4j.ConsoleAppender">
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%-4r [%t] %-5p %c %x - %m%n" />
        </layout>
        <filter class="org.apache.log4j.varia.LevelRangeFilter">
            <param name="LevelMin" value="DEBUG" />
            <param name="LevelMax" value="DEBUG" />
        </filter>
    </appender>

    <logger name="com.ibatis" additivity="true">
        <level value="DEBUG" />
    </logger>
    <logger name="java.sql.Connection" additivity="true">
        <level value="DEBUG" />
    </logger>
    <logger name="java.sql.Statement" additivity="true">
        <level value="DEBUG" />
    </logger>
    <logger name="java.sql.PreparedStatement" additivity="true">
        <level value="DEBUG" />
        <appender-ref ref="IBatis" />
    </logger>
    <logger name="java.sql.ResultSet" additivity="true">
        <level value="DEBUG" />
        <appender-ref ref="IBatis" />
    </logger>
</log4j:configuration>