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!