log4j hibernate错误

Question

在配置我的休眠时,我收到此错误

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
log4j:WARN Please initialize the log4j system properly.

这是代码行

Configuration config = new AnnotationConfiguration().configure("HibernatePositionServer.cfg.xml");

这是我的cfg文件

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
    <!--<property name="connection.url">jdbc:mysql://[Here i put correct IP:Port]/settings</property>-->
    <!--<property name="connection.url">jdbc:mysql://127.0.0.1:1433/settings</property>-->

    <property name="connection.driver_class">org.gjt.mm.mysql.Driver</property>
    <property name="connection.username">root</property>
    <property name="connection.password">Programa17</property>

    <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
    <property name="hibernate.c3p0.timeout">300</property>
    <property name="hibernate.c3p0.idle_test_period">150</property>
    <property name="hibernate.c3p0.min_size">1</property>
    <property name="hibernate.c3p0.max_size">1</property>

    <!-- DB schema will be updated if needed -->
    <property name="hibernate.show_sql">true</property>
    <property name="hbm2ddl.auto">update</property>
    <!--<property name="hbm2ddl.auto">update</property>-->
    <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>

</session-factory>

Answer 1

首先询问Google,这是最常见的Log4J错误消息之一.简单地说:Log4J(日志记录和监视框架)从Hibernate收到一条日志消息,不知道该如何处理(在控制台上打印,放入文件,忽略......？)

将包含log4j.xml在CLASSPATH根目录中的文件(src/main/resource使用maven时)放入以下内容:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
  <appender name="console" class="org.apache.log4j.ConsoleAppender"> 
    <param name="Target" value="System.out"/> 
    <layout class="org.apache.log4j.PatternLayout"> 
      <param name="ConversionPattern" value="%-5p %c{1} - %m%n"/> 
    </layout> 
  </appender> 

  <root> 
    <priority value ="debug" /> 
    <appender-ref ref="console" /> 
  </root>

</log4j:configuration>