运行我的项目时出现 java.lang.NoClassDefFoundError 错误
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java.lang.NoClassDefFoundError error when running my project
提问by user352951
I have been struggling to get this to work and I think i can use some help. I am working on a Java project where the pom.xml has a bunch of dependencies some of which are themselves indirectly dependent on this jar:
com.sun.jersey:jersey-core:1.17.1like this:
我一直在努力让它发挥作用，我想我可以使用一些帮助。我正在开发一个 Java 项目，其中 pom.xml 有一堆依赖项，其中一些本身间接依赖于这个 jar：
com.sun.jersey:jersey-core:1.17.1像这样：
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
<version>1.0.1</version>
</dependency>
And I need this particular jar in my pom because I want to use the new features in jax-rs api:
javax.ws.rs:javax.ws.rs-api:2.0.The problem is when I build my project I get this error:
我需要在我的 pom 中使用这个特定的 jar，因为我想使用 jax-rs api 中的新功能：
javax.ws.rs:javax.ws.rs-api:2.0。问题是当我构建我的项目时，我收到此错误：
Found duplicate classes in [com.sun.jersey:jersey-core:1.17.1,javax.ws.rs:javax.ws.rs-api:2.0] :
[WARNING] javax.ws.rs.ApplicationPath
[WARNING] javax.ws.rs.Consumes
[WARNING] javax.ws.rs.CookieParam
[WARNING] javax.ws.rs.DELETE
[WARNING] javax.ws.rs.DefaultValue
[WARNING] javax.ws.rs.Encoded
[WARNING] javax.ws.rs.FormParam
[WARNING] javax.ws.rs.GET
[WARNING] javax.ws.rs.HEAD
[WARNING] javax.ws.rs.HeaderParam
...
..
I tried to fix this by excluding com.sun.jersey:jersey-core:1.17.1from dependencies which were including it by checking the dependency tree.
我试图com.sun.jersey:jersey-core:1.17.1通过检查依赖关系树从包含它的依赖项中排除来解决这个问题。
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
<version>1.0.1</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-core</artifactId>
</exclusion>
</exclusions>
</dependency>
Now the project builds fine but when I try to run it I get this error:
现在该项目构建良好，但是当我尝试运行它时，出现此错误：
java.lang.NoClassDefFoundError: com/sun/jersey/core/util/FeaturesAndProperties
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.7.0_51]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2531) ~[na:1.7.0_51]
at java.lang.Class.getDeclaredMethods(Class.java:1855) ~[na:1.7.0_51]
at com.google.inject.internal.ProviderMethodsModule.getProviderMethods
(ProviderMethodsModule.java:81) ~[guice-3.0.jar:na]
at com.google.inject.internal.ProviderMethodsModule.configure
(ProviderMethodsModule.java:73) ~[guice-3.0.jar:na]
at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)
~[guice-3.0.jar:na]
at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:232)
~[guice-3.0.jar:na]
at com.google.inject.spi.Elements.getElements(Elements.java:101) ~[guice-3.0.jar:na]
at com.google.inject.spi.Elements.getElements(Elements.java:92) ~[guice-3.0.jar:na]
It seems like jersey core was needed but how do I get around this problem?
似乎需要球衣核心，但我该如何解决这个问题？
采纳答案by Will
You can't mix JAX-RS/ Jerseyversions
你不能混合JAX-RS/Jersey版本
Jerseyversion 1is the reference implementation for JAX-RS 1.Jerseyversion 1uses thecom.sun.jerseygroup / package prefix.Jerseyversion 2is the reference implementation for JAX-RS 2.Jerseyversion 2uses theorg.glassfish.jerseygroup / package prefix
Jersey版本1是 JAX-RS 1 的参考实现。Jersey版本1使用com.sun.jersey组/包前缀。Jersey版本2是 JAX-RS 2 的参考实现。Jersey版本2使用org.glassfish.jersey组/包前缀
If you have both Jersey versions, or both JAX-RS versions on your classpath, you'll get lots of NoClassDefFoundError, NoSuchMethodErroror similar.
如果您的类路径上有两个 Jersey 版本，或两个 JAX-RS 版本，您将获得很多NoClassDefFoundError，NoSuchMethodError或类似的。
If possible use JAX-RS/ Jerseyversion 2
如果可能，请使用JAX-RS/Jersey版本 2
回答by Pino
Jersey is the reference implementation of JAX-RS, so you don't need the latest version of JAX-RS API (javax.ws.rs:javax.ws.rs-api:2.0) but the latest version of Jersey which is 2.8 (see https://jersey.java.net/).
Jersey 是 JAX-RS 的参考实现，因此您不需要最新版本的 JAX-RS API ( javax.ws.rs:javax.ws.rs-api:2.0) 而是最新版本的 Jersey 2.8（请参阅https://jersey.java.net/）。
回答by rogerdpack
For me this actually means I had somehow mixed things and was using
对我来说，这实际上意味着我以某种方式混合了东西并且正在使用
$ mvn dependency:list | grep jersey
[INFO] com.sun.jersey:jersey-client:jar:1.11:compile
[INFO] com.sun.jersey:jersey-core:jar:1.0.2:compile
(conflict within jersey 1.x)
（球衣 1.x 内的冲突）
