最近整合 spring-mvc 和 activeMq ,出現了幾個異常,我把他記錄下來,具體的原理分析我就不太會寫了,只把詳細情況和解決方案給出來,希望對各位老鐵有所幫助!
問題1:缺少log4j的配置文件
異常信息:出現以下的內容時,可能就是你沒有配置 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.
解決方案:
在你的WEB-INF 目錄下面,添加配置文件 log4j.properties 文件, 文件配置參考如下:
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, 代碼如下
<context-param> <param-name>log4jConfigLocation</param-name> <param-value>/WEB-INF/log4j.properties</param-value> </context-param>
問題2:缺少對xml 文件的 schemaLocation 設置
異常內容:
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, 但無法找到元素 'context:component-scan' 的聲明。
解決方案:
保證自己的schemaLocation 中的元素與xmlns 一致,並版本號,如果無法確定版本號是,默認用當前版本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"/> <!-- 配置掃描路徑 --> <context:component-scan base-package="com.spring.mvc.*"> <!-- 只掃描Service,也可以添加Repostory,但是要把Controller排除在外,Controller由spring-mvc.xml去加載 --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> </beans>
如果我將 『
http://www.springframework.org/schema/contex
http://www.springframework.org/schema/context/spring-context.xsd
』
注釋掉,就會出現以上異常!
問題3:無法注入元素
異常內容:
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
解決方案:
這個問題困擾了我挺長時間的,后面通過谷歌,我發現原來是我的mvn 少了一個庫,所以,添加上就好了。具體如下
<dependency> <groupId>org.apache.xbean</groupId> <artifactId>xbean-spring</artifactId> <version>4.6</version> </dependency>
問題4:無法加載ApplicationContext-ActiveMq.xml 配置文件
異常信息:
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
問題分析:
我在設置 contextConfigLocation 時,錯誤的寫錯了這樣子。對!就是 classpath:spring/applicationContext.xml 少了個 * 號
,這樣子是沒辦法加載到 ApplicationContext-ActiveMq.xml的,因為總要有地方引入,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>
解決方案:
<context-param> <param-name>contextConfigLocation</param-name> <param-value> classpath:spring/applicationContext*.xml </param-value> </context-param>
好了,就到這里,希望能大家不要踩到這些坑!