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项目使用Spring3+MyBatis3整合，但是控制台就是部署出SQL语句，网上找了很多资料，都说是Log4j配置文件的问题，修改了N 边Log4j配置文件依然无效。

除了SQL 语句，其他都能显示，纠结的很

我的Log4j的配置文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "http://toolkit.alibaba-inc.com/dtd/log4j/log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>
    <!-- ===================================================================== -->
    <!--  定义全局输出适配器                                                      -->
    <!-- ===================================================================== -->
    <appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender">
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="[%d{yyyy-MM-dd HH:mm:ss.SSS}]-[%c]-[%t] %x - %m%n"/>
        </layout>
    </appender>

    <!-- Mybatis and SQL -->
    <logger name="org.apache.ibatis" additivity="true">
        <level value="DEBUG"/>
        <appender-ref ref="consoleAppender"/>
    </logger>

    <logger name="org.mybatis.spring" additivity="true">
        <level value="ERROR"/>
        <appender-ref ref="consoleAppender"/>
    </logger>
    <logger name="java.sql" additivity="true">
        <level value="DEBUG"/>
        <appender-ref ref="consoleAppender"/>
    </logger>

    <logger name="java.sql.Connection" additivity="true">
        <level value="DEBUG"/>
        <appender-ref ref="consoleAppender"/>
    </logger>

    <logger name="java.sql.Statement" additivity="true">
        <level value="DEBUG"/>
        <appender-ref ref="consoleAppender"/>
    </logger>

    <logger name="java.sql.PreparedStatement" additivity="true">
        <level value="DEBUG"/>
        <appender-ref ref="consoleAppender"/>
    </logger>

    <!-- Spring -->
    <logger name="org.springframework" additivity="true">
        <level value="ERROR"/>
        <appender-ref ref="consoleAppender"/>
    </logger>

    <!-- ActiveMQ -->
    <logger name="org.apache.activemq" additivity="true">
        <level value="ERROR"/>
        <appender-ref ref="consoleAppender"/>
    </logger>
    <!-- ===================================================================== -->
    <!--  根日志记录器                                                          -->
    <!-- ===================================================================== -->
    <root>
        <level value="DEBUG"/>
        <appender-ref ref="consoleAppender"/>
    </root>
</log4j:configuration>

最后，仔细查看启动时的输入发现了如下的错误提示：

log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader). 
log4j:WARN Please initialize the log4j system properly.

于是，我想是不是这个地方出问题了呢，赶紧上网搜索解决这个问题的资料。网上找到一个解释：

地址：http://lveyo.iteye.com/blog/418376

这个提示应该是读入web应用程序的log4j.properties文件之前就报出来了。是在加载org.springframework.web.context.ContextLoader这个listener的时候没找到log4j的配置文件造成的。

仔细查看web.xml发现在加载org.springframework.web.context.ContextLoader这个listener之后才加载org.springframework.web.util.Log4jConfigListener，把log4j的配置放到org.springframework.web.context.ContextLoader之前，就可以解决这个问题了。

于是，我在web.xml配置文件中加入Log4j的配置，部分配置文件如下：

<!--Log4j配置-->
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>/WEB-INF/log4j.xml</param-value>
    </context-param>
    <context-param>
        <param-name>log4jRefreshInterval</param-name>
        <param-value>60000</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>

    <!-- 扫描spring配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/application-*.xml</param-value>
    </context-param>

    <!-- 监听器 -->
    <listener>
        <listener-class>com.hanvon.iface.web.listener.WebAppEventListener</listener-class>
    </listener>
.......

增加了上面的Log4j配置部分后，结果真的可以打印SQL 语句了，太高兴了！！！

我觉得，起作用的主要是下面的配置内容，这个配置正确设置了Log4j：

<context-param>  
    <param-name>log4jConfigLocation</param-name>  
    <param-value>/WEB-INF/log4j.xml</param-value>  
</context-param>  
<context-param>  
    <param-name>log4jRefreshInterval</param-name>  
    <param-value>60000</param-value>  
</context-param>  
<listener>  
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>  
</listener>

部分SQL语句输出如下：

[2013-06-06 21:07:35.040]-[java.sql.PreparedStatement]-[http-8080-2]  - ==>  Executing: SELECT COUNT(DISTINCT dev.ng_id) FROM dev_device dev WHERE dev.nt_state=? 
[2013-06-06 21:07:35.040]-[java.sql.PreparedStatement]-[http-8080-2]  - ==>  Executing: SELECT COUNT(DISTINCT dev.ng_id) FROM dev_device dev WHERE dev.nt_state=? 
[2013-06-06 21:07:35.040]-[java.sql.PreparedStatement]-[http-8080-1]  - ==> Parameters: 
[2013-06-06 21:07:35.040]-[java.sql.PreparedStatement]-[http-8080-1]  - ==> Parameters: 
[2013-06-06 21:07:35.040]-[java.sql.PreparedStatement]-[http-8080-2]  - ==>  Executing: SELECT COUNT(DISTINCT dev.ng_id) FROM dev_device dev WHERE dev.nt_state=? 
[2013-06-06 21:07:35.040]-[java.sql.PreparedStatement]-[http-8080-1]  - ==> Parameters: 
[2013-06-06 21:07:35.041]-[java.sql.PreparedStatement]-[http-8080-2]  - ==> Parameters: 1(Integer)
[2013-06-06 21:07:35.041]-[java.sql.PreparedStatement]-[http-8080-2]  - ==> Parameters: 1(Integer)
[2013-06-06 21:07:35.041]-[java.sql.PreparedStatement]-[http-8080-2]  - ==> Parameters: 1(Integer)
[2013-06-06 21:07:35.079]-[java.sql.ResultSet]-[http-8080-2]  - <==    Columns: COUNT(DISTINCT dev.ng_id)
[2013-06-06 21:07:35.079]-[java.sql.ResultSet]-[http-8080-2]  - <==    Columns: COUNT(DISTINCT dev.ng_id)
[2013-06-06 21:07:35.087]-[java.sql.ResultSet]-[http-8080-2]  - <==        Row: 11
[2013-06-06 21:07:35.087]-[java.sql.ResultSet]-[http-8080-2]  - <==        Row: 11

希望我的经验能够帮助到大家！