最近整合 spring-mvc 和 activeMq ,出现了几个异常,我把他记录下来,具体的原理分析我就不太会写了,只把详细情况和解决方案给出来,希望对各位老铁有所帮助!
问题1:缺少log4j的配置文件
异常信息:出现以下的内容时,可能就是你没有配置 log4j 了。
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.
解决方案:
在你的WEB-INF 目录下面,添加配置文件 log4j.properties 文件, 文件配置参考如下:
log4j.rootLogger=info, Console, err
log4j.logger.play=DEBUG
# Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.encoding=UTF-8
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern={ "time": "%d{yyyy-MM-dd HH:mm:ss}", "level": "%p", %m }%n
log4j.appender.err = org.apache.log4j.DailyRollingFileAppender
log4j.appender.err.encoding=UTF-8
log4j.appender.err.File = logs/appName_error.log
log4j.appender.err.Append = True
log4j.appender.err.Threshold = ERROR
log4j.appender.err.layout = org.apache.log4j.PatternLayout
log4j.appender.err.layout.ConversionPattern = { "time": "%d{yyyy-MM-dd HH:mm:ss}", "level": "%p", %m }%n
log4j.additivity.err=false
log4j.appender.info = org.apache.log4j.DailyRollingFileAppender
log4j.appender.info.encoding=UTF-8
log4j.appender.info.File = logs/appName.log
log4j.appender.info.Append = True
log4j.appender.info.Threshold = INFO
log4j.appender.info.layout = org.apache.log4j.PatternLayout
log4j.appender.info.layout.ConversionPattern = { "time": "%d{yyyy-MM-dd HH:mm:ss}", "level": "%p", %m }%n
然后在你的 web.xml 里面添加 context-param, 代码如下
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>/WEB-INF/log4j.properties</param-value>
</context-param>
问题2:缺少对xml 文件的 schemaLocation 设置
异常内容:
applicationContext.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 14; columnNumber: 61; cvc-complex-type.2.4.c: 通配符的匹配很全面, 但无法找到元素 'context:component-scan' 的声明。
解决方案:
保证自己的schemaLocation 中的元素与xmlns 一致,并版本号,如果无法确定版本号是,默认用当前版本spring的。如我的 web.xml
<?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.xsd
">
<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
<!-- 配置扫描路径 -->
<context:component-scan base-package="com.spring.mvc.*">
<!-- 只扫描Service,也可以添加Repostory,但是要把Controller排除在外,Controller由spring-mvc.xml去加载 -->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>
如果我将 『
http://www.springframework.org/schema/contex
http://www.springframework.org/schema/context/spring-context.xsd
』
注释掉,就会出现以上异常!
问题3:无法注入元素
异常内容:
org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from file [/Users/zeopean/IdeaProjects/springJms/target/springJms/WEB-INF/classes/spring/applicationContext-ActiveMQ.xml]; nested exception is org.springframework.beans.FatalBeanException: NamespaceHandler class [org.apache.xbean.spring.context.v2.XBeanNamespaceHandler] for namespace [http://activemq.apache.org/schema/core] not found; nested exception is java.lang.ClassNotFoundException: org.apache.xbean.spring.context.v2.XBeanNamespaceHandler
解决方案:
这个问题困扰了我挺长时间的,后面通过谷歌,我发现原来是我的mvn 少了一个库,所以,添加上就好了。具体如下
<dependency>
<groupId>org.apache.xbean</groupId>
<artifactId>xbean-spring</artifactId>
<version>4.6</version>
</dependency>
问题4:无法加载ApplicationContext-ActiveMq.xml 配置文件
异常信息:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'consumerService': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'jmsTemplate' available
问题分析:
我在设置 contextConfigLocation 时,错误的写错了这样子。对!就是 classpath:spring/applicationContext.xml 少了个 * 号
,这样子是没办法加载到 ApplicationContext-ActiveMq.xml的,因为总要有地方引入,配置才能注入成功嘛!
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:spring/applicationContext.xml
</param-value>
</context-param>
解决方案:
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:spring/applicationContext*.xml
</param-value>
</context-param>
好了,就到这里,希望能大家不要踩到这些坑!
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