Maven 依赖排除似乎不起作用

Question

I have a Maven project depending on couple other Maven projects. I am using Spring 3.1.1 in my project and dependent projects have 3.0.6. I am trying to exclude Spring 3.0.6 when deploying since having both isn't possible. I have added an explicit exclusion in my POM for that but for some reason I still see old version of spring core jars in the WEB-INF/lib folder when I start the Tomcat server. Can someone point me out where I am going wrong. Here is my pom.xml :

<project>
   ....
<properties>
    <org.springframework-version>3.1.1.RELEASE</org.springframework-version>
</properties>
<dependency> 
        <groupId>com.test.abc</groupId> 
        <artifactId>abc</artifactId>
         <version>1.0</version>
         <type>war</type>
        <exclusions>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
             </exclusion>
        </exclusions>            
      </dependency> 
          <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${org.springframework-version}</version>
        <exclusions>
            <!-- Exclude Commons Logging in favor of SLF4j -->
            <exclusion>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
             </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${org.springframework-version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${org.springframework-version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-oxm</artifactId>
        <version>3.0.4.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${org.springframework-version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.ws</groupId>
        <artifactId>spring-xml</artifactId>
        <version>1.0-m2</version>
    </dependency>
        ....    
       </project>

Answer 1

Your dependency type is war so there is no resolution happening here. Maven overlays the war contents over your project.

When the war is published to repository, the artifact will contain dependent libraries in WEB-INF lib folder. During overlay it does not treat lib folder any different from any static resource unless you tell it to exclude in different way.Check 'overlay' property here

Answer 2

In my case I thought I excluded the right dependency. With eclipse, on dependency hierarchy tab you can right click on it and click exclude artifact and it excluded the right dependency (they both had the same artifactId but different groupId)