maven项目生成的war包在tomcat下运行报错

时间：2023-01-28 15:59:22



maven项目在tomcat中运行 主要会有两种错误:

一是依赖包冲突

二是slf4j包错误


如下:

信息: Deploying web application archive D:\tomcat7\webapps\ipFilterM-0.0.1-SNAPSHOT.war
2014-11-18 17:17:01 org.apache.catalina.loader.WebappClassLoader validateJarFile
信息: validateJarFile(D:\tomcat7\webapps\ipFilterM-0.0.1-SNAPSHOT\WEB-INF\lib\javax.servlet-3.0.1.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
2014-11-18 17:17:01 org.apache.catalina.loader.WebappClassLoader validateJarFile
信息: validateJarFile(D:\tomcat7\webapps\ipFilterM-0.0.1-SNAPSHOT\WEB-INF\lib\javax.servlet.jsp-3.0.1.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/el/Expression.class
2014-11-18 17:17:01 org.apache.catalina.loader.WebappClassLoader validateJarFile
信息: validateJarFile(D:\tomcat7\webapps\ipFilterM-0.0.1-SNAPSHOT\WEB-INF\lib\jsp-api-2.1.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/el/Expression.class
2014-11-18 17:17:01 org.apache.catalina.loader.WebappClassLoader validateJarFile
信息: validateJarFile(D:\tomcat7\webapps\ipFilterM-0.0.1-SNAPSHOT\WEB-INF\lib\servlet-api-2.3.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
2014-11-18 17:17:01 org.apache.catalina.loader.WebappClassLoader validateJarFile
信息: validateJarFile(D:\tomcat7\webapps\ipFilterM-0.0.1-SNAPSHOT\WEB-INF\lib\servlet-api-2.5.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
2014-11-18 17:17:01 org.apache.catalina.loader.WebappClassLoader validateJarFile
信息: validateJarFile(D:\tomcat7\webapps\ipFilterM-0.0.1-SNAPSHOT\WEB-INF\lib\tomcat-servlet-api-8.0.15.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class

maven项目生成的war包在tomcat下运行报错

严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/Object;Ljava/lang/Throwable;)V
	at org.apache.commons.logging.impl.SLF4JLocationAwareLog.info(SLF4JLocationAwareLog.java:159)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:272)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
	at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:976)
	at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1653)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)
maven项目生成的war包在tomcat下运行报错


我们来分析原因和尝试解决:

依赖包冲突

原因

在Maven1中，需要把依赖所需要的包每个列出。这对于使用类似如Hibernate的用户来说所操的心太多了，而且也不方便。在Maven2及以上版本中实现了传递依赖，如此对于Hibernate所依赖的包，Maven2会自动下载，开发人员只需关心Hibernate即可。所以可以看出列出所需要的每个jar是在maven1中的功能，Maven2以上版本认为自动下载是一种改进。

       这样就产生了一个问题：Maven2以上版本虽然把编译时需要的jar都下载了，但并不是所有编译需要的jar在打成war包后运行时也需要。所以也就发现有许多的jar是不需要的，以至war包比较大。还会产生冲突。

       类包冲突的一个很大的原因即产类包之间的间接依赖引起的。每个显式声明的类包都会依赖于一些其它的隐式类包，这些隐式的类包会被maven间接引入进来，因而可能造成一个我们不想要的类包的载入，严重的甚至会引起类包之间的冲突。


例如:

servlet-api.jar

信息: validateJarFile(D:\tomcat7\webapps\ipFilterM-0.0.1-SNAPSHOT\WEB-INF\lib\servlet-api-2.3.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class

造成这种情况的原因很可能是以下两种情况：

一、项目的WEB-INF/lib下有servlet-api.jar，与Tomcat自带的servlet-api.jar冲突了。

二、项目的WEB-INF/lib下有包含javax.servlet包的其他JAR包（如WebLogic 8.1的weblogic.jar），造成与Tomcat自带的servlet-api.jar的冲突。

 

因为Tomcat的WebappClassLoader加载JAR包时会进行校验，一旦发现上述冲突就会报出上面的异常。



解决方法

直接引用的包

要加上<scope>provided</scope>标签

maven的dependency中有一个tag是<scope>option</scope>，其option有以下几个值：

  compile， 缺省值，适用于所有阶段，会随着项目一起发布。

  provided，类似compile，期望JDK、容器或使用者会提供这个依赖。如servlet-api-2.3.jar。

  runtime， 在运行时使用，如JDBC驱动，适用运行和测试阶段。   如plexus-utils-1.1.jar

  test     只在测试时使用，用于编译和运行测试代码。不会随项目发布。如Junit-3.8.1.jar

  system， 类似provided，需要显式提供包含依赖的jar，Maven不会在Repository中查找它。

例如:

javax.servlet-3.0.1.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class

 
<dependency>
			<groupId>org.glassfish</groupId>
			<artifactId>javax.servlet</artifactId>
			<version>3.0.1</version>			
		</dependency>


在pom.xml中是直接引用的，则改为: 
<dependency>
			<groupId>org.glassfish</groupId>
			<artifactId>javax.servlet</artifactId>
			<version>3.0.1</version>
			<scope>provided</scope>
		</dependency>

间接引用包

间接冲突解决方法一新建一个provided冲突包

新建一个冲突包，加上<scope>provided</scope>标签
例如:servlet-api-2.3.jar
在pom.xml中没有它的信息，是其它包间接引用了它
则我们新建如下: 
	<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.3</version>
			<scope>provided</scope>
		</dependency>

间接冲突解决方法二把冲突包依赖排除在外

这种情况下同一类型的包只保留一个*的，其他有冲突的低级包全部要排除在外
例子如下:

项目里要用到commons-logging。它有几个依赖，其中有一个是servlet-api-2.3.jar。现在我需要用到容器内的servlet-api的异步功能，编译的时候却总是自动引用默认的2.3版本。请问哪位有经验处理这样的冲突，可以屏蔽掉servlet-api-2.3.jar这个依赖包。

如果你的工程是用maven管理的话，可以在commons-logging的依赖里把servlet-api-2.3去除掉，再加入你所需要的版本的servlet-api依赖。大概的例子如下： 
 
<!--如果你的工程是用maven管理的话，可以在commons-logging的依赖里把servlet-api-2.3去除掉，再加入你所需要的版本的servlet-api依赖。大概的例子如下：  -->
<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>1.1.1</version>
			<exclusions>
				<exclusion>
					<groupId>javax.servlet</groupId>
					<artifactId>servlet-api</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

<dependency>

			<groupId>org.mortbay.jetty</groupId>
			<artifactId>servlet-api-2.5</artifactId>
			<version>6.1.14</version>
			<scope>provided</scope>
		</dependency>
<!-- 指定scope为provided可以避免在发布的时候把servlet-api包拷到lib目录下。 -->


新增一个 冲突包的
provided的dependency   
针对每一个冲突包,要在它上级的包里都加上exclusions把冲突包排除在外


新增和排除 都能在myeclipse中可视化操作
如图:
maven项目生成的war包在tomcat下运行报错


maven项目生成的war包在tomcat下运行报错


找间接依赖的包的两个方法
在myeclipse的视图中查找
maven项目生成的war包在tomcat下运行报错


依赖树
在cmd命令行中进入该项目的pom.xml所在位置:
输入命令: 
mvn dependency:tree
maven项目生成的war包在tomcat下运行报错

稍等一会我们就可以看到扫描出的依赖树了，在里面我们可以看到包的依赖关系
maven项目生成的war包在tomcat下运行报错

我扫描出的依赖树如下: 
.0.8/maven-model-2.0.8.pom
Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/maven-model/2.
0.8/maven-model-2.0.8.pom (4 KB at 2.8 KB/sec)
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/2.0.8/maven-project-2.0.8.pom
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2.0.8/maven-project-2.0.8.pom (3 KB at 4.8 KB/sec)
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s/2.0.8/maven-settings-2.0.8.pom
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/2.0.8/maven-settings-2.0.8.pom (3 KB at 3.7 KB/sec)
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/2.0.8/maven-profile-2.0.8.pom
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2.0.8/maven-profile-2.0.8.pom (2 KB at 4.5 KB/sec)
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t-manager/2.0.8/maven-artifact-manager-2.0.8.pom
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ory-metadata/2.0.8/maven-repository-metadata-2.0.8.pom
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ry-metadata/2.0.8/maven-repository-metadata-2.0.8.pom (2 KB at 4.5 KB/sec)
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registry/2.0.8/maven-plugin-registry-2.0.8.pom
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egistry/2.0.8/maven-plugin-registry-2.0.8.pom (2 KB at 4.5 KB/sec)
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api/2.0.8/maven-plugin-api-2.0.8.pom
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pi/2.0.8/maven-plugin-api-2.0.8.pom (2 KB at 3.3 KB/sec)
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ls/2.1/plexus-utils-2.1.pom
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s/2.1/plexus-utils-2.1.pom (4 KB at 1.8 KB/sec)
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invoker/2.0.11/maven-invoker-2.0.11.pom
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en-reporting-api/3.0/maven-reporting-api-3.0.jar
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en-reporting-impl/2.0.5/maven-reporting-impl-2.0.5.jar
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ore/1.0/doxia-core-1.0.jar
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dator/1.2.0/commons-validator-1.2.0.jar
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doxia-tools/1.0.2/maven-doxia-tools-1.0.2.jar
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n-reporting-api/3.0/maven-reporting-api-3.0.jar (11 KB at 5.4 KB/sec)
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utils/1.7.0/commons-beanutils-1.7.0.jar
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n-reporting-impl/2.0.5/maven-reporting-impl-2.0.5.jar (21 KB at 3.6 KB/sec)
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ter/1.6/commons-digester-1.6.jar
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g/1.0.4/commons-logging-1.0.4.jar
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/1.0.4/commons-logging-1.0.4.jar (38 KB at 2.6 KB/sec)
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ink-api/1.0/doxia-sink-api-1.0.jar
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nk-api/1.0/doxia-sink-api-1.0.jar (10 KB at 16.6 KB/sec)
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ite-renderer/1.0/doxia-site-renderer-1.0.jar
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te-renderer/1.0/doxia-site-renderer-1.0.jar (46 KB at 38.3 KB/sec)
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odule-apt/1.0/doxia-module-apt-1.0.jar
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coration-model/1.0/doxia-decoration-model-1.0.jar (48 KB at 30.4 KB/sec)
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odule-xdoc/1.0/doxia-module-xdoc-1.0.jar
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odule-xhtml/1.0/doxia-module-xhtml-1.0.jar
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dule-xdoc/1.0/doxia-module-xdoc-1.0.jar (28 KB at 29.8 KB/sec)
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hiver/2.3/plexus-archiver-2.3.jar
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ator/1.2.0/commons-validator-1.2.0.jar (89 KB at 2.1 KB/sec)
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ls/3.0.9/plexus-utils-3.0.9.jar
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dependency-analyzer/1.4/maven-dependency-analyzer-1.4.jar
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hared-io/1.1/maven-shared-io-1.1.jar (39 KB at 14.7 KB/sec)
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/0.9.0.M2/aether-util-0.9.0.M2.jar
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er/1.6/commons-digester-1.6.jar (165 KB at 3.8 KB/sec)
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invoker/2.0.11/maven-invoker-2.0.11.jar
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ommon-artifact-filters/1.4/maven-common-artifact-filters-1.4.jar (31 KB at 26.1
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0.9.0.M2/aether-util-0.9.0.M2.jar (131 KB at 19.3 KB/sec)
Downloaded: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-util
s/3.0.9/plexus-utils-3.0.9.jar (227 KB at 11.2 KB/sec)
[INFO] ipFilterM:ipFilterM:war:0.0.1-SNAPSHOT
[INFO] +- org.mortbay.jetty:servlet-api-2.5:jar:6.1.14:provided
[INFO] +- javax.activation:activation:jar:1.1:compile
[INFO] +- org.apache.james:apache-mime4j-core:jar:0.7.2:compile
[INFO] +- org.apache.ws.commons.axiom:axiom-api:jar:1.2.13:compile
[INFO] |  +- org.apache.geronimo.specs:geronimo-activation_1.1_spec:jar:1.1:comp
ile
[INFO] |  +- org.apache.geronimo.specs:geronimo-javamail_1.4_spec:jar:1.7.1:comp
ile
[INFO] |  +- jaxen:jaxen:jar:1.1.3:compile
[INFO] |  \- org.apache.geronimo.specs:geronimo-stax-api_1.0_spec:jar:1.0.1:comp
ile
[INFO] +- org.apache.ws.commons.axiom:axiom-impl:jar:1.2.13:compile
[INFO] |  \- org.codehaus.woodstox:wstx-asl:jar:3.2.9:compile
[INFO] +- org.apache.ws.commons.axiom:axiom-dom:jar:1.2.13:compile
[INFO] +- org.apache.axis2:axis2-adb:jar:1.6.2:compile
[INFO] +- org.apache.axis2:axis2-adb-codegen:jar:1.6.2:compile
[INFO] |  \- commons-cli:commons-cli:jar:1.2:compile
[INFO] +- ant:ant:jar:1.6.2:compile
[INFO] +- org.apache.axis2:axis2-codegen:jar:1.6.2:compile
[INFO] +- org.apache.axis2:axis2-fastinfoset:jar:1.6.2:compile
[INFO] |  \- com.sun.xml.fastinfoset:FastInfoset:jar:1.2.7:compile
[INFO] +- org.apache.axis2:axis2-java2wsdl:jar:1.6.2:compile
[INFO] |  \- org.apache.ant:ant:jar:1.7.0:compile
[INFO] +- org.apache.axis2:axis2-ant-plugin:jar:1.6.2:compile
[INFO] +- org.apache.axis2:axis2-clustering:jar:1.6.2:compile
[INFO] |  +- org.apache.tomcat:tribes:jar:6.0.16:compile
[INFO] |  \- org.apache.tomcat:juli:jar:6.0.16:compile
[INFO] +- org.apache.axis2:axis2-jibx:jar:1.6.2:compile
[INFO] |  +- org.jibx:jibx-bind:jar:1.2:compile
[INFO] |  \- org.jibx:jibx-run:jar:1.2:compile
[INFO] +- org.apache.axis2:axis2-json:jar:1.6.2:compile
[INFO] |  \- org.codehaus.jettison:jettison:jar:1.0-RC2:compile
[INFO] +- org.apache.axis2:axis2-kernel:jar:1.6.2:compile
[INFO] |  +- org.apache.geronimo.specs:geronimo-ws-metadata_2.0_spec:jar:1.1.2:c
ompile
[INFO] |  +- org.apache.geronimo.specs:geronimo-jta_1.1_spec:jar:1.1:compile
[INFO] |  +- javax.servlet:servlet-api:jar:2.3:compile
[INFO] |  \- javax.ws.rs:jsr311-api:jar:1.0:compile
[INFO] +- org.apache.axis2:axis2-mtompolicy:jar:1.6.2:compile
[INFO] +- org.apache.axis2:axis2-saaj:jar:1.6.2:compile
[INFO] |  \- org.apache.geronimo.specs:geronimo-saaj_1.3_spec:jar:1.0.1:compile
[INFO] +- org.apache.axis2:axis2-soapmonitor-servlet:jar:1.6.2:compile
[INFO] +- org.apache.axis2:axis2-spring:jar:1.6.2:compile
[INFO] +- org.apache.axis2:axis2-transport-http:jar:1.6.2:compile
[INFO] +- org.apache.axis2:axis2-transport-local:jar:1.6.2:compile
[INFO] +- org.apache.axis2:axis2-xmlbeans:jar:1.6.2:compile
[INFO] |  +- org.apache.xmlbeans:xmlbeans:jar:2.3.0:compile
[INFO] |  \- org.apache.ant:ant-launcher:jar:1.7.0:compile
[INFO] +- bcel:bcel:jar:5.1:compile
[INFO] |  \- regexp:regexp:jar:1.2:compile
[INFO] +- net.sf.jmatchparser:jMatchParser-icu4j-chardet:jar:0.1:compile
[INFO] |  \- com.ibm.icu:icu4j:jar:4.8.1.1:compile
[INFO] +- com.github.sebhoss:common-annotations:jar:1.0.0:compile
[INFO] |  \- com.google.code.findbugs:jsr305:jar:2.0.1:compile
[INFO] +- commons-beanutils:commons-beanutils:jar:1.8.3:compile
[INFO] +- commons-codec:commons-codec:jar:1.6:compile
[INFO] +- commons-collections:commons-collections:jar:3.2.1:compile
[INFO] +- commons-discovery:commons-discovery:jar:0.4:compile
[INFO] +- commons-fileupload:commons-fileupload:jar:1.3:compile
[INFO] +- commons-httpclient:commons-httpclient:jar:3.1:compile
[INFO] +- commons-io:commons-io:jar:2.4:compile
[INFO] +- commons-lang:commons-lang:jar:2.6:compile
[INFO] +- org.apache.commons:commons-lang3:jar:3.1:compile
[INFO] +- commons-logging:commons-logging:jar:1.1.1:compile
[INFO] +- dom4j:dom4j:jar:1.6.1:compile
[INFO] |  \- xml-apis:xml-apis:jar:1.0.b2:compile
[INFO] +- net.sf.ezmorph:ezmorph:jar:1.0.6:compile
[INFO] +- net.sourceforge.htmlcleaner:htmlcleaner:jar:2.2:compile
[INFO] |  \- org.jdom:jdom:jar:1.1:compile
[INFO] +- org.freemarker:freemarker:jar:2.3.19:compile
[INFO] +- org.apache.httpcomponents:httpclient:jar:4.2.5:compile
[INFO] +- org.apache.httpcomponents:httpclient-cache:jar:4.2.5:compile
[INFO] +- org.apache.httpcomponents:httpcore:jar:4.2.4:compile
[INFO] +- gov.nist.math:jama:jar:1.0.3:compile
[INFO] +- javassist:javassist:jar:3.11.0.GA:compile
[INFO] +- net.sf.json-lib:json-lib:jar:jdk15:2.3:compile
[INFO] +- org.jsoup:jsoup:jar:1.7.2:compile
[INFO] +- junit:junit:jar:4.11:compile
[INFO] |  \- org.hamcrest:hamcrest-core:jar:1.3:compile
[INFO] +- log4j:log4j:jar:1.2.17:compile
[INFO] +- org.apache.lucene:lucene-core:jar:4.3.1:compile
[INFO] +- org.mongodb:mongo-java-driver:jar:2.10.1:compile
[INFO] +- org.apache.neethi:neethi:jar:3.0.2:compile
[INFO] |  \- org.codehaus.woodstox:woodstox-core-asl:jar:4.0.8:compile
[INFO] |     +- javax.xml.stream:stax-api:jar:1.0-2:compile
[INFO] |     \- org.codehaus.woodstox:stax2-api:jar:3.0.2:compile
[INFO] +- ognl:ognl:jar:3.0.6:compile
[INFO] +- org.apache.poi:poi:jar:3.9:compile
[INFO] +- org.quartz-scheduler:quartz:jar:2.2.1:compile
[INFO] |  \- c3p0:c3p0:jar:0.9.1.1:compile
[INFO] +- org.quartz-scheduler:quartz-jobs:jar:2.2.1:compile
[INFO] +- org.slf4j:slf4j-api:jar:1.6.6:compile
[INFO] +- org.slf4j:slf4j-simple:jar:1.7.5:compile
[INFO] +- org.springframework:spring-beans:jar:4.0.0.RELEASE:compile
[INFO] +- org.springframework:spring-aspects:jar:4.0.0.RELEASE:compile
[INFO] +- org.springframework:spring-aop:jar:4.0.0.RELEASE:compile
[INFO] +- org.springframework:spring-context:jar:4.0.0.RELEASE:compile
[INFO] +- org.springframework:spring-context-support:jar:4.0.0.RELEASE:compile
[INFO] +- org.springframework:spring-core:jar:4.0.0.RELEASE:compile
[INFO] +- org.springframework.data:spring-data-commons:jar:1.5.0.RELEASE:compile

[INFO] |  \- org.slf4j:jcl-over-slf4j:jar:1.7.1:runtime
[INFO] +- org.springframework.data:spring-data-mongodb:jar:1.2.0.RELEASE:compile

[INFO] +- org.springframework.data:spring-data-mongodb-cross-store:jar:1.2.0.REL
EASE:compile
[INFO] |  +- org.aspectj:aspectjrt:jar:1.7.1:compile
[INFO] |  +- cglib:cglib:jar:2.2:compile
[INFO] |  \- org.hibernate.javax.persistence:hibernate-jpa-2.0-api:jar:1.0.0.Fin
al:compile
[INFO] +- org.springframework.data:spring-data-mongodb-log4j:jar:1.2.0.RELEASE:c
ompile
[INFO] +- org.aspectj:aspectjweaver:jar:1.8.0:compile
[INFO] +- org.springframework:spring-expression:jar:4.0.0.RELEASE:compile
[INFO] +- org.springframework:spring-orm:jar:4.0.0.RELEASE:compile
[INFO] |  +- aopalliance:aopalliance:jar:1.0:compile
[INFO] |  \- org.springframework:spring-jdbc:jar:4.0.0.RELEASE:compile
[INFO] +- org.springframework:spring-tx:jar:4.0.0.RELEASE:compile
[INFO] +- org.springframework:spring-web:jar:4.0.0.RELEASE:compile
[INFO] +- org.apache.struts:struts2-core:jar:2.3.15.1:compile
[INFO] +- org.apache.struts:struts2-json-plugin:jar:2.3.15.1:compile
[INFO] +- org.apache.struts:struts2-spring-plugin:jar:2.3.15.1:compile
[INFO] +- org.apache.woden:woden-api:jar:1.0M9:compile
[INFO] +- org.apache.woden:woden-impl-commons:jar:1.0M9:compile
[INFO] +- org.apache.woden:woden-impl-dom:jar:1.0M9:compile
[INFO] +- wsdl4j:wsdl4j:jar:1.6.2:compile
[INFO] +- xalan:xalan:jar:2.7.0:compile
[INFO] +- xml-resolver:xml-resolver:jar:1.2:compile
[INFO] +- org.apache.ws.commons.schema:XmlSchema:jar:1.4.7:compile
[INFO] \- org.apache.struts.xwork:xwork-core:jar:2.3.15.1:compile
[INFO]    +- asm:asm:jar:3.3:compile
[INFO]    \- asm:asm-commons:jar:3.3:compile
[INFO]       \- asm:asm-tree:jar:3.3:compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 02:27 min
[INFO] Finished at: 2014-11-17T19:37:06+08:00
[INFO] Final Memory: 14M/33M
[INFO] ------------------------------------------------------------------------
D:\workspace\ipFilterM>
根据以上方法依次解决每个包的依赖冲突后，该问题解决。


slf4j包错误

错误如下: 
java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/Object;Ljava/lang/Throwable;)V
at org.apache.commons.logging.impl.SLF4JLocationAwareLog.error(SLF4JLocationAwareLog.java:225)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:319)
at com.alibaba.citrus.webx.context.WebxComponentsLoader.initWebApplicationContext(WebxComponentsLoader.java:117)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4779)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5273)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895)


原因

slf4j错误本质上也是包的冲突错误，编译时和运行时采用了不一样的jar.它的报错信息说的是 在这个类中找不到对应的方法,这是因为 slf4j包不同的版本，方法名不一样导致的。比如tomcat默认的使用某一版本的sjf4j包，但我们引入了一个新版本的包，这时候tomcat就会去找新版本的包，当然就找不到这个方法。

我们在myeclipse的pom.xml视图中也能看到这样的冲突,如图:
maven项目生成的war包在tomcat下运行报错


那么解决的方法跟上述的依赖包类似

解决方法

方案一

把冲突的包provided，看看依赖库里，只要是有slf4j字母的包全部provided,重新发布war后，war包解压出来的工程lib中已经没有slf4j字母的包了，那就ok了。
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