我正在使用 Jersey 和 Maven 在 Java 中构建 REST API。我使用 Tomcat 9 作为我的服务器。在我今天尝试安装 RestAssured、 Hamcrest 和 JUnit 之前，一切正常。突然间，我所有的端点都抛出了 500 个内部服务器错误。 500 错误的根本原因是 java.lang.NoClassDefFoundError: org/glassfish/jersey/internal/inject/Binder.

我在这 2 小时内做了什么:

• 我试图在谷歌上找到这个类:org/glassfish/jersey/internal/inject/Binder，但无济于事。
• 我曾尝试卸载 RestAssured、Hamcrest 和 JUnit，但无济于事。

这个问题让我很沮丧。知道为什么会发生此错误吗？提前致谢!

这是服务器日志的摘录:

SEVERE: Allocate exception for servlet Jersey Web Application java.lang.ClassNotFoundException: org.glassfish.jersey.internal.inject.Binder at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1275) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1109) at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:178) at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:370) at javax.servlet.GenericServlet.init(GenericServlet.java:158) at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1183) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1099) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:779) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:133) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:498) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:796) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1368) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Unknown Source)

下面是我的 pom.xml 文件:(使用 RestAssured、Hamcrest 和 JUnit)

<dependencies>
    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet-core</artifactId>
        <!-- use the following artifactId if you don't need servlet 2.x compatibility -->
        <!-- artifactId>jersey-container-servlet</artifactId -->
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-moxy</artifactId>
    </dependency>
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.8.0</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.6</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.hamcrest</groupId>
        <artifactId>hamcrest-all</artifactId>
        <version>1.3</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.jayway.restassured</groupId>
        <artifactId>rest-assured</artifactId>
        <version>2.9.0</version>
        <scope>test</scope>
    </dependency>
</dependencies>

下面是我的 web.xml 文件:

<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>com.accelbyte.vincent.emailist.resources</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>Jersey Web Application</servlet-name>
    <url-pattern>/webapi/*</url-pattern>
</servlet-mapping>

下面是我的项目结构:

Email list project structure

最佳答案

核心 Jersey 之间很可能存在版本不匹配和 Jersey 之一导入 Binder 的扩展库类(class)。确保所有与 Jersey 相关的模块都有明确的版本(并且它们相互匹配)。或者更好的是，通过导入 jersey-bom 来修复你的版本。例如:

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.glassfish.jersey</groupId>
            <artifactId>jersey-bom</artifactId>
            <version>2.26-b03</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

然后你的主要<dependencies>部分可能会省略版本。

关于java.lang.NoClassDefFoundError : org/glassfish/jersey/internal/inject/Binder when started Tomcat Server 错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43486463/