的Maven的JarClassLoader：警告：讓Foo.class在X.jar隱藏byY.jar（具有不同的字節碼）

Question

當我加入java.mail支持我的項目：

 <dependency> 
     <groupId>javax.mail</groupId> 
     <artifactId>mail</artifactId> 
     <version>1.4.1</version> 
    </dependency> 
    <dependency> 
     <groupId>javax.activation</groupId> 
     <artifactId>activation</artifactId> 
     <version>1.1.1</version> 
    </dependency> 

我開始收到洪水警告信息像這樣的（當我運行內置的jar）：

JarClassLoader: Warning: javax/mail/Address.class in lib/mail-1.4.1.jar is hidden by lib/geronimo-javamail_1.4_spec-1.7.1.jar (with different bytecode) 
JarClassLoader: Warning: javax/mail/AuthenticationFailedException.class in lib/mail-1.4.1.jar is hidden by lib/geronimo-javamail_1.4_spec-1.7.1.jar (with differ 
ent bytecode) 
JarClassLoader: Warning: javax/mail/Authenticator.class in lib/mail-1.4.1.jar is hidden by lib/geronimo-javamail_1.4_spec-1.7.1.jar (with different bytecode) 
JarClassLoader: Warning: javax/mail/BodyPart.class in lib/mail-1.4.1.jar is hidden by lib/geronimo-javamail_1.4_spec-1.7.1.jar (with different bytecode) 
JarClassLoader: Warning: javax/mail/EventQueue.class in lib/mail-1.4.1.jar is hidden by lib/geronimo-javamail_1.4_spec-1.7.1.jar (with different bytecode) 
JarClassLoader: Warning: javax/mail/FetchProfile$Item.class in lib/mail-1.4.1.jar is hidden by lib/geronimo-javamail_1.4_spec-1.7.1.jar (with different bytecode 
) 

我的程序運行良好（併發送電子郵件罰款），但我不希望所有這些數以百計的JarClassLoader警告...

任何想法如何休息礦石和平&安靜我的控制檯日誌？

---

更新：多虧了Jigar喬希尖端下方，我發現不需要Geronimo的javamail_1.4_spec-1.7.1.jar來自org.apache.cxf：CXF-API中：jar：2.7 1.1：編譯，所以我加了一個排除：

<dependency> 
     <groupId>org.apache.cxf</groupId> 
     <artifactId>cxf-api</artifactId> 
     <version>2.7.1</version> 
     <exclusions> 
      <exclusion> 
      <groupId>org.apache.geronimo.specs</groupId> 
      <artifactId>geronimo-javamail_1.4_spec</artifactId> 
     </exclusion> 
     </exclusions> 
    </dependency> 

而且mvn dependency:tree命令不再顯示「的Geronimo」作爲依賴，但我仍然得到所有這些警告，當我運行新產生的JAR（建從乾淨！）

附加su ggestions？

---

更新2：這是依賴關係部分中我的pom.xml：

<dependencies> 
    <dependency> 
    <groupId>junit</groupId> 
    <artifactId>junit</artifactId> 
    <version>3.8.1</version> 
    <scope>test</scope> 
    </dependency> 


    <dependency> 
    <groupId>org.apache.cxf</groupId> 
    <artifactId>cxf-rt-frontend-jaxws</artifactId> 
    <version>2.7.1</version> 
    <type>jar</type> 
    <scope>runtime</scope> 
    </dependency> 
    <dependency> 
    <groupId>org.apache.cxf</groupId> 
    <artifactId>cxf-rt-transports-http</artifactId> 
    <version>2.7.1</version> 
    <type>jar</type> 
    <scope>runtime</scope> 
    </dependency> 
    <dependency> 
    <groupId>org.springframework</groupId> 
    <artifactId>spring-web</artifactId> 
    <version>3.0.7.RELEASE</version> 
    </dependency> 


    <dependency> 
    <groupId>mysql</groupId> 
    <artifactId>mysql-connector-java</artifactId> 
    <version>5.1.26</version> 
    </dependency> 
    <dependency> 
    <groupId>org.hibernate</groupId> 
    <artifactId>hibernate-core</artifactId> 
    <version>4.2.6.Final</version> 
    </dependency> 
    <dependency> 
    <groupId>org.apache.cxf</groupId> 
    <artifactId>cxf-api</artifactId> 
    <version>2.7.1</version> 
    <exclusions> 
     <exclusion> 
    <groupId>org.apache.geronimo.specs</groupId> 
    <artifactId>geronimo-javamail_1.4_spec</artifactId> 
     </exclusion> 
    </exclusions> 
    </dependency> 
    <dependency> 
    <groupId>org.apache.cxf</groupId> 
    <artifactId>cxf-rt-transports-http</artifactId> 
    <version>2.7.1</version> 
    <type>jar</type> 
    </dependency> 

    <dependency> 
    <groupId>javax.servlet</groupId> 
    <artifactId>servlet-api</artifactId> 
    <version>2.5</version> 
    </dependency> 

    <dependency> 
    <groupId>javax.mail</groupId> 
    <artifactId>mail</artifactId> 
    <version>1.4.1</version> 
    </dependency> 
    <dependency> 
    <groupId>javax.activation</groupId> 
    <artifactId>activation</artifactId> 
    <version>1.1.1</version> 
    </dependency> 

</dependencies> 

Answer 1

這一警告說你必須現在從多個罐子同一類，因此它可以在運行時

作祟

例如：

JarClassLoader: Warning: javax/mail/EventQueue.class in lib/mail-1.4.1.jar is hidden by lib/geronimo-javamail_1.4_spec-1.7.1.jar (with different bytecode) 

我的廟你正在尋找從mail-1.4.1.jar，而不是那類從geronimo-javamail_1.4_spec-1.7.1.jar例如

你將不得不排除這種非想罐子，這樣它不會使自己在類路徑，或者通過使用<exclusions>或<optional>標籤，它可能是從其他jar的依賴

來執行mvn dependency:tree從那裏來了追查和<exclude>它

---

請參見

• <optional> & <exclusions>