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maven包依赖冲突问题

java服务在运行时抛出如下异常

EXCEPTION: java.lang.NoSuchMethodError: org.apache.commons.codec.binary.Base64.decodeBase64(Ljava/lang/String;)[B java.lang.NoSuchMethodError:

后查明是包依赖冲突的问题，本来应该使用commons-codec:commons-codec，但实际上使用了org.apache.commons:com.springsource.org.apache.commons.codec

# mvn dependency:tree  [INFO] +- commons-codec:commons-codec:jar:1.8:compile [INFO] +- org.apache.commons:com.springsource.org.apache.commons.httpclient:jar:3.1.0:compile [INFO] |  +- org.apache.commons:com.springsource.org.apache.commons.codec:jar:1.3.0:compile [INFO] |  /- org.apache.commons:com.springsource.org.apache.commons.logging:jar:1.1.1:compile

解决方法，依赖httpclient时将codec包排除掉

    <dependency>  <groupId>org.apache.commons</groupId>  <artifactId>com.springsource.org.apache.commons.httpclient</artifactId>  <version>3.1.0</version>  <exclusions>    <exclusion>      <artifactId>com.springsource.org.apache.commons.codec</artifactId>      <groupId>org.apache.commons</groupId>    </exclusion>  </exclusions>   </dependency>

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