我有一个包含许多EJB依赖项的EAR。其中1个具有提供的范围依赖性：
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4</version>
<scope>provided</scope>
</dependency>
但是在jar里面有jar mail-1.4.3.jar（我以前删除了我的依赖）
我试过了：
mvn eclipse:clean
mvn dependency:tree
mvn dependency:analyze-only
但是没有办法摆脱这个jar，导致我的`java.lang.ClassCastException：javax.mail.Session无法强制转换为服务器中的javax.mail.Session
这里是完整的pom.xml：
<!--
~ Copyright 2010-2012, CloudBees Inc.
~
~ Licensed under the Apache License, Version 2.0 (the "License");
~ you may not use this file except in compliance with the License.
~ You may obtain a copy of the License at
~
~ http://www.apache.org/licenses/LICENSE-2.0
~
~ Unless required by applicable law or agreed to in writing, software
~ distributed under the License is distributed on an "AS IS" BASIS,
~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
~ See the License for the specific language governing permissions and
~ limitations under the License.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>localdomain.localhost</groupId>
<artifactId>myApp</artifactId>
<packaging>war</packaging>
<version>1.0.2-SNAPSHOT</version>
<name>conFloorApp</name>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.8.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>3.2.8.RELEASE</version>
<type>jar</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>javax.servlet.jsp.jstl-api</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<!-- Apache JSTL implementation -->
<groupId>org.glassfish.web</groupId>
<artifactId>javax.servlet.jsp.jstl</artifactId>
<version>1.2.2</version>
<exclusions>
<exclusion>
<!--
use javax.servlet.jsp.jstl:javax.servlet.jsp.jstl-api, exclude this one
-->
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<!-- used for the troubleshooting jsp datasource-mysql.jsp -->
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.27</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.3.Final</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.12.1.GA</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.8.4.5</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>3.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>3.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-aspects</artifactId>
<version>3.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.maxmind.geoip</groupId>
<artifactId>geoip-api</artifactId>
<version>1.2.11</version>
</dependency>
<dependency>
<groupId>com.github.dandelion</groupId>
<artifactId>datatables-jsp</artifactId>
<version>0.9.3</version>
</dependency>
</dependencies>
<build>
<extensions>
<extension>
<groupId>org.apache.maven.wagon</groupId>
<artifactId>wagon-webdav</artifactId>
<version>1.0-beta-2</version>
</extension>
</extensions>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<scm>
<connection>scm:git:https://github.com/CloudBees-community/tomcat7-maven-clickstart.git</connection>
<tag>HEAD</tag>
</scm>
<distributionManagement>
<repository>
<id>community-release</id>
<url>dav:https://repository-community.forge.cloudbees.com/release/</url>
</repository>
<snapshotRepository>
<id>community-snapshot</id>
<url>dav:https://repository-community.forge.cloudbees.com/snapshot/</url>
</snapshotRepository>
</distributionManagement>
<licenses>
<license>
<name>The Apache Software License, Version 2.0</name>
<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
<distribution>repo</distribution>
</license>
</licenses>
</project>
答案 0 :(得分：1)
你正在寻找错误的地方。这是你的pom的依赖树。根据依赖树，这个pom不会将mail.jar拉到其他地方。看看其他一些可能将mail.jar作为依赖项的项目。
检查依赖关系树的命令
mvn dependency:tree -Dverbose
请注意，只有一个mail.jar条目标记为已提供，因此此pom不是问题
[INFO] +- javax.mail:mail:jar:1.4:provided
[INFO] | \- javax.activation:activation:jar:1.1:provided
依赖关系树的完整输出
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building conFloorApp 1.0.2-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.1:tree (default-cli) @ myApp ---
[INFO] localdomain.localhost:myApp:war:1.0.2-SNAPSHOT
[INFO] +- junit:junit:jar:4.8.1:test (scope not updated to compile)
[INFO] +- org.mockito:mockito-all:jar:1.8.4:compile
[INFO] +- org.springframework:spring-test:jar:3.2.8.RELEASE:test
[INFO] | \- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - scope updated from test; omitted for duplicate)
[INFO] +- javax.servlet:javax.servlet-api:jar:3.0.1:provided
[INFO] +- javax.servlet.jsp:javax.servlet.jsp-api:jar:2.2.1:provided
[INFO] +- javax.servlet.jsp.jstl:javax.servlet.jsp.jstl-api:jar:1.2.1:compile
[INFO] +- org.glassfish.web:javax.servlet.jsp.jstl:jar:1.2.2:compile
[INFO] +- mysql:mysql-connector-java:jar:5.1.27:provided
[INFO] +- org.springframework:spring-context:jar:3.2.8.RELEASE:compile
[INFO] | +- org.springframework:spring-aop:jar:3.2.8.RELEASE:compile
[INFO] | | +- (aopalliance:aopalliance:jar:1.0:compile - omitted for duplicate)
[INFO] | | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | | \- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- org.springframework:spring-beans:jar:3.2.8.RELEASE:compile
[INFO] | | \- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | \- org.springframework:spring-expression:jar:3.2.8.RELEASE:compile
[INFO] | \- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework:spring-core:jar:3.2.8.RELEASE:compile
[INFO] | \- commons-logging:commons-logging:jar:1.1.3:compile
[INFO] +- org.springframework:spring-web:jar:3.2.8.RELEASE:compile
[INFO] | +- (org.springframework:spring-aop:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-context:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | \- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework:spring-webmvc:jar:3.2.8.RELEASE:compile
[INFO] | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-context:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-expression:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | \- (org.springframework:spring-web:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework:spring-orm:jar:3.2.8.RELEASE:compile
[INFO] | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-jdbc:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | \- org.springframework:spring-tx:jar:3.2.8.RELEASE:compile
[INFO] | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | \- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] +- org.hibernate:hibernate-core:jar:3.6.3.Final:compile
[INFO] | +- antlr:antlr:jar:2.7.6:compile
[INFO] | +- commons-collections:commons-collections:jar:3.1:compile
[INFO] | +- dom4j:dom4j:jar:1.6.1:compile
[INFO] | +- org.hibernate:hibernate-commons-annotations:jar:3.2.0.Final:compile
[INFO] | | \- (org.slf4j:slf4j-api:jar:1.5.8:compile - omitted for conflict with 1.6.1)
[INFO] | +- org.hibernate.javax.persistence:hibernate-jpa-2.0-api:jar:1.0.0.Final:compile
[INFO] | +- javax.transaction:jta:jar:1.1:compile
[INFO] | \- org.slf4j:slf4j-api:jar:1.6.1:compile
[INFO] +- org.springframework:spring-jdbc:jar:3.2.8.RELEASE:compile
[INFO] | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | \- (org.springframework:spring-tx:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] +- javassist:javassist:jar:3.12.1.GA:compile
[INFO] +- c3p0:c3p0:jar:0.8.4.5:compile
[INFO] +- cglib:cglib:jar:2.2:compile
[INFO] | \- asm:asm:jar:3.1:compile
[INFO] +- org.springframework.security:spring-security-web:jar:3.2.3.RELEASE:compile
[INFO] | +- aopalliance:aopalliance:jar:1.0:compile
[INFO] | +- org.springframework.security:spring-security-core:jar:3.2.3.RELEASE:compile
[INFO] | | +- (aopalliance:aopalliance:jar:1.0:compile - omitted for duplicate)
[INFO] | | +- (org.springframework:spring-aop:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | | +- (org.springframework:spring-context:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | | +- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | | \- (org.springframework:spring-expression:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-context:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-expression:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | \- (org.springframework:spring-web:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework.security:spring-security-config:jar:3.2.3.RELEASE:compile
[INFO] | +- (aopalliance:aopalliance:jar:1.0:compile - omitted for duplicate)
[INFO] | +- (org.springframework.security:spring-security-core:jar:3.2.3.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-aop:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-context:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | \- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] +- org.springframework.security:spring-security-aspects:jar:3.2.3.RELEASE:compile
[INFO] | +- (org.springframework.security:spring-security-core:jar:3.2.3.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-beans:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | +- (org.springframework:spring-context:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] | \- (org.springframework:spring-core:jar:3.2.8.RELEASE:compile - omitted for duplicate)
[INFO] +- javax.mail:mail:jar:1.4:provided
[INFO] | \- javax.activation:activation:jar:1.1:provided
[INFO] +- com.maxmind.geoip:geoip-api:jar:1.2.11:compile
[INFO] \- com.github.dandelion:datatables-jsp:jar:0.9.3:compile
[INFO] +- com.github.dandelion:datatables-core:jar:0.9.3:compile
[INFO] | +- com.googlecode.json-simple:json-simple:jar:1.1.1:compile
[INFO] | | \- (junit:junit:jar:4.10:compile - omitted for conflict with 4.8.1)
[INFO] | +- commons-beanutils:commons-beanutils:jar:1.8.3:compile
[INFO] | \- (org.slf4j:slf4j-api:jar:1.7.5:compile - omitted for conflict with 1.6.1)
[INFO] \- (org.slf4j:slf4j-api:jar:1.7.5:compile - omitted for conflict with 1.6.1)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.611s
[INFO] Finished at: Fri May 23 21:55:07 EDT 2014
[INFO] Final Memory: 10M/245M
[INFO] ------------------------------------------------------------------------