问题
I have spent all day trying to solve the logging problem I'm having with log4j in a webapp. No matter what I do, I cannot get rid of the following:
log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Just to be clear, I have read all of the articles here on Stack Overflow addressing this issue. I've read the log4j manual. I've been through a dozen different tutorials. I've tried the properties approach and the XML approach (log4j.properties and log4j.xml, respectively). Also, I have confirmed that the log4j.xml file is being read. Aside from the fact that the server tells me so during startup, I can influence the level of feedback through the .xml file. So, yes, the log4j.xml file is in the CLASSPATH.
I know I'm missing something simple and fundamental. Below are the relevant files:
LOG4J.XML (/WEB-INF):
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<!-- Appenders -->
<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 - %m%n" />
</layout>
</appender>
<!-- Application Loggers -->
<logger name="com.tiersoftinc.testlog">
<level value="info" />
</logger>
<!-- 3rdparty Loggers -->
<logger name="org.springframework.core">
<level value="info" />
</logger>
<logger name="org.springframework.beans">
<level value="info" />
</logger>
<logger name="org.springframework.context">
<level value="info" />
</logger>
<logger name="org.springframework.web">
<level value="info" />
</logger>
<!-- Root Logger -->
<root>
<priority value="warn" />
<appender-ref ref="console" />
</root>
</log4j:configuration>
and WEB.XML (/WEB-INF):
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- The definition of the Root Spring Container shared by all Servlets and Filters, and the applicationContext.xml file -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/spring/root-context.xml
/WEB-INF/spring/app-context.xml
</param-value>
</context-param>
<!-- Logging listener -->
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>/WEB-INF/log4j.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
and APP-CONTEXT.XML (/WEB-INF/spring):
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">
<!-- Activates various annotations to be detected in bean classes -->
<context:annotation-config />
<!-- Scans the classpath for annotated components that will be auto-registered as Spring beans.
For example @Controller and @Service. Make sure to set the correct base-package -->
<context:component-scan base-package="com.tiersoftinc.gridlab3" />
<!-- Configures the annotation-driven Spring MVC Controller programming model.
Note that, with Spring 3.0, this tag works in Servlet MVC only! -->
<mvc:annotation-driven />
<mvc:resources mapping="/resources/**" location="/resources/" />
<!-- Imports datasource configuration -->
<import resource="app-context-mongo.xml"/>
</beans>
and APP-CONTEXT-MONGO.XML (/WEB-INF/spring):
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/data/mongo
http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.1.xsd">
<!-- Activate Spring Data MongoDB repository support -->
<mongo:repositories base-package="com.tiersoftinc.gridlab3.repository" />
<bean id="propertyPlaceholderConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>/WEB-INF/spring/database.properties</value>
</list>
</property>
</bean>
<!-- MongoDB host -->
<mongo:mongo host="${mongo.host.name}" port="${mongo.host.port}"/>
<!-- Template for performing MongoDB operations -->
<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate"
c:mongo-ref="mongo" c:databaseName="${mongo.db.name}"/>
<!-- Service for initializing MongoDB with sample data using MongoTemplate -->
<bean id="initGridLab3Service" class="com.tiersoftinc.gridlab3.services.InitGridLab3Service" init-method="init"/>
</beans>
and, finally, ROOT-CONTEXT.XML (/WEB-INF/spring):
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">
<!-- Root Context: defines shared resources visible to all other web components -->
<context:annotation-config />
</beans>
What am I missing?
Thank you.
回答1:
Have you tried this?
<logger name="org.springframework.web">
<level value="info" />
<appender-ref ref="console" />
</logger>
回答2:
Put these lines in the beginning of web.xml
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:/main/resources/log4j.xml</param-value>
</context-param>
See this link for more detail http://mariemjabloun.blogspot.com/2014/04/resolved-log4jwarn-no-appenders-could.html
来源：https://stackoverflow.com/questions/14433023/under-spring-framework-warn-warn-no-appenders-could-be-found-for-logger-org-s