Question

我正在尝试设置Jersey 2 servlet应用程序。目标是仅将一些URL映射到Jersey REST API，而其他URL则提供静态内容。

我使用mvn compile war:war生成战争并进行部署。部署工件时会发生以下错误：

[2016-01-09 02:50:21,617] Artifact Test.war: Artifact is being deployed, please wait...
2016-01-09 14:50:25.823:WARN:oejd.DeploymentManager:Scanner-1: Unable to reach node goal: started
java.lang.NoClassDefFoundError: org/glassfish/jersey/server/spi/Container
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at org.eclipse.jetty.webapp.WebAppClassLoader.findClass(WebAppClassLoader.java:549)
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:475)
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:428)
    at org.eclipse.jetty.util.Loader.loadClass(Loader.java:86)
    at org.eclipse.jetty.servlet.BaseHolder.doStart(BaseHolder.java:95)
    at org.eclipse.jetty.servlet.ServletHolder.doStart(ServletHolder.java:347)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:892)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:346)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1380)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:772)
    at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:259)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:518)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:41)
    at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:188)
    at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:499)
    at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:147)
    at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:180)
    at org.eclipse.jetty.deploy.providers.WebAppProvider.fileAdded(WebAppProvider.java:459)
    at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:64)
    at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:610)
    at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:529)
    at org.eclipse.jetty.util.Scanner.scan(Scanner.java:392)
    at org.eclipse.jetty.util.Scanner$1.run(Scanner.java:329)
    at java.util.TimerThread.mainLoop(Timer.java:555)
    at java.util.TimerThread.run(Timer.java:505)
Caused by: 
java.lang.ClassNotFoundException: org.glassfish.jersey.server.spi.Container
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:487)
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:428)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at org.eclipse.jetty.webapp.WebAppClassLoader.findClass(WebAppClassLoader.java:549)
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:475)
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:428)
    at org.eclipse.jetty.util.Loader.loadClass(Loader.java:86)
    at org.eclipse.jetty.servlet.BaseHolder.doStart(BaseHolder.java:95)
    at org.eclipse.jetty.servlet.ServletHolder.doStart(ServletHolder.java:347)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:892)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:346)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1380)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:772)
    at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:259)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:518)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
    at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:41)
    at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:188)
    at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:499)
    at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:147)
    at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:180)
    at org.eclipse.jetty.deploy.providers.WebAppProvider.fileAdded(WebAppProvider.java:459)
    at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:64)
    at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:610)
    at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:529)
    at org.eclipse.jetty.util.Scanner.scan(Scanner.java:392)
    at org.eclipse.jetty.util.Scanner$1.run(Scanner.java:329)
    at java.util.TimerThread.mainLoop(Timer.java:555)
    at java.util.TimerThread.run(Timer.java:505)
[2016-01-09 02:50:26,121] Artifact Test.war: Error during artifact deployment. See server log for details.

我的pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>group.id</groupId>
    <artifactId>ProjectName</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet</artifactId>
            <version>2.22.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-server</artifactId>
            <version>2.22.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-client</artifactId>
            <version>2.22.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet-core</artifactId>
            <version>2.22.1</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-jetty-http</artifactId>
            <version>2.22.1</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-jetty-servlet</artifactId>
            <version>2.22.1</version>
        </dependency>
    </dependencies>

    <build>
        <finalName>Test</finalName>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <webXml>web/WEB-INF/web.xml</webXml>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

我的web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    <servlet>
        <servlet-name>ApiApplication</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>org.glassfish.jersey.config.property.packages</param-name>
            <param-value>group.id</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>ApiApplication</servlet-name>
        <url-pattern>/api/*</url-pattern>
    </servlet-mapping>
</web-app>

Jersey 2应用程序配置ApiApplication.java：

import javax.ws.rs.ApplicationPath;

@ApplicationPath("/api")
public class ApiApplication extends ResourceConfig {
    public ApiApplication() {
        packages(true, "group.id");
    }
}

测试资源Test.java：

package group.id;

import javax.ws.rs.GET;
import javax.ws.rs.Path;

@Path("/test")
public class Test {
    @GET
    public String get() {
        return "Hello world!";
    }
}

当我查看WAR文件时，WEB-INF / lib中充满了JAR文件。为什么Jetty不能部署WAR文件？

Answer 1

这三个依赖

<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet</artifactId>
    <version>2.22.1</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.core</groupId>
    <artifactId>jersey-server</artifactId>
    <version>2.22.1</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.core</groupId>
    <artifactId>jersey-client</artifactId>
    <version>2.22.1</version>
    <scope>provided</scope>
</dependency>

已被此依赖项拉入

<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-jetty-servlet</artifactId>
    <version>2.22.1</version>
</dependency>

但是当你声明它们时，你会覆盖它将它们拉入的事实。你将它们声明为provided

<scope>provided</scope>

这意味着您说服务器具有这些依赖关系，而不是。如果你查看WEB-INF / lib，你会看到那三个不存在。这就是错误的原因。最好的办法就是摆脱这三个，因为它们已被拉入。

你实际上可以摆脱所有除了最后一个，因为它会引入你声明的所有内容。

java.lang.NoClassDefFoundError：org / glassfish / jersey / server / spi / Container

1 个答案: