在使用REST API时出现“内部服务器错误”。

huangapple
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英文:

Getting INTERNAL SERVER ERROR while using REST API

问题

Trying to implement REST services using JERSEY project but getting below error:
This is the message I receive in the console:

    java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: javax/ws/rs/core/FeatureContext
    	at org.glassfish.hk2.utilities.cache.LRUHybridCache.compute(LRUHybridCache.java:292)
    	...

Please find the code and xml files.
Thanks in advance

**pom.xml**

    <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/maven-v4_0_0.xsd">
    
    	<modelVersion>4.0.0</modelVersion>
    
    	<groupId>com.rest</groupId>
    	<artifactId>restdemo</artifactId>
    	<packaging>war</packaging>
    	<version>0.0.1-SNAPSHOT</version>
    	<name>restdemo</name>
    
    	<build>
    		<finalName>restdemo</finalName>
    		<plugins>
    			<plugin>
    				<groupId>org.apache.maven.plugins</groupId>
    				<artifactId>maven-compiler-plugin</artifactId>
    				<version>2.5.1</version>
    				<inherited>true</inherited>
    				<configuration>
    					<source>1.7</source>
    					<target>1.7</target>
    				</configuration>
    			</plugin>
    		</plugins>
    	</build>
    
    	<dependencyManagement>
    		<dependencies>
    			<dependency>
    				<groupId>org.glassfish.jersey</groupId>
    				<artifactId>jersey-bom</artifactId>
    				<version>${jersey.version}</version>
    				<type>pom</type>
    				<scope>import</scope>
    			</dependency>
    		</dependencies>
    	</dependencyManagement>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.glassfish.jersey.containers</groupId>
    			<artifactId>jersey-container-servlet-core</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>javax.xml.bind</groupId>
    			<artifactId>jaxb-api</artifactId>
    			<version>2.1</version>
    			<scope>provided</scope>
    		</dependency>
    
    		<dependency>
    			<groupId>org.glassfish.jersey.inject</groupId>
    			<artifactId>jersey-hk2</artifactId>
    		</dependency>
    
    	</dependencies>
    	<properties>
    		<jersey.version>3.0.0-M1</jersey.version>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    </project>

**Alien.java**

     package com.rest.restdemo;
     import javax.xml.bind.annotation.XmlRootElement;
     
     @XmlRootElement 
     public class Alien { 	
     private String name; 	
     private int points; 	
     public String getName() { 		
     return name; 	
     } 	
     public void setName(String name) { 		
      this.name = name; 	
     } 	
     public int getPoints()
     { 		
        return points; 
     } 	
     public void setPoints(int points) 
     {
     		this.points = points; 	
     }
    }

**AlienResource.java**

    package com.rest.restdemo;
    import jakarta.ws.rs.GET;
    import jakarta.ws.rs.Path;
    import jakarta.ws.rs.Produces;
    import jakarta.ws.rs.core.MediaType;
    @Path("aliens")
    
    public class AlienResource {
    	
    	@GET
    	@Produces(MediaType.APPLICATION_XML)
    	public Alien getAlien() {
    	
    		Alien a=new Alien();
    		a.setName("Sam");
    		a.setPoints(60);
    		return a;
    	}
    }

**web.xml**

    <?xml version="1.0" encoding="UTF-8"?>
    <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.rest.restdemo</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>
    </web-app>

When I am launching this on the browser, I am getting INTERNAL SERVER ERROR-500

Please help me on how to handle INTERNAL SERVER ERROR during runtime in REST. Am I missing some dependencies?
英文:

Trying to implement REST services using JERSEY project but getting below error:
This is the message I receive in the console:

java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: javax/ws/rs/core/FeatureContext
	at org.glassfish.hk2.utilities.cache.LRUHybridCache.compute(LRUHybridCache.java:292)
	at org.glassfish.hk2.utilities.reflection.internal.ClassReflectionHelperImpl.getAllMethods(ClassReflectionHelperImpl.java:85)
	at org.jvnet.hk2.internal.Utilities.findInitializerMethods(Utilities.java:1400)
	at org.jvnet.hk2.internal.DefaultClassAnalyzer.getInitializerMethods(DefaultClassAnalyzer.java:83)
	at org.glassfish.jersey.inject.hk2.JerseyClassAnalyzer.getInitializerMethods(JerseyClassAnalyzer.java:218)
	at org.jvnet.hk2.internal.Utilities.getInitMethods(Utilities.java:196)
	at org.jvnet.hk2.internal.Utilities.justInject(Utilities.java:974)
	at org.jvnet.hk2.internal.ServiceLocatorImpl.inject(ServiceLocatorImpl.java:998)
	at org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:1073)
	at org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:1064)
	at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.createAndInitialize(AbstractHk2InjectionManager.java:189)
	at org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.createAndInitialize(ImmediateHk2InjectionManager.java:30)
	at org.glassfish.jersey.model.internal.CommonConfig.configureAutoDiscoverableProviders(CommonConfig.java:592)
	at org.glassfish.jersey.server.ResourceConfig.configureAutoDiscoverableProviders(ResourceConfig.java:810)
	at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:322)
	at org.glassfish.jersey.server.ApplicationHandler.lambda$initialize$1(ApplicationHandler.java:293)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
	at org.glassfish.jersey.internal.Errors.processWithException(Errors.java:232)
	at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:292)
	at org.glassfish.jersey.server.ApplicationHandler.&lt;init&gt;(ApplicationHandler.java:259)
	at org.glassfish.jersey.servlet.WebComponent.&lt;init&gt;(WebComponent.java:311)
	at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:154)
	at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:347)
	at javax.servlet.GenericServlet.init(GenericServlet.java:158)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1134)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1089)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:983)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4876)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5185)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(Unknown Source)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(Unknown Source)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:633)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:343)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:474)

Please find the code and xml files.
Thanks in advance

pom.xml

&lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot;
	xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
	xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd&quot;&gt;

	&lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;

	&lt;groupId&gt;com.rest&lt;/groupId&gt;
	&lt;artifactId&gt;restdemo&lt;/artifactId&gt;
	&lt;packaging&gt;war&lt;/packaging&gt;
	&lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt;
	&lt;name&gt;restdemo&lt;/name&gt;

	&lt;build&gt;
		&lt;finalName&gt;restdemo&lt;/finalName&gt;
		&lt;plugins&gt;
			&lt;plugin&gt;
				&lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
				&lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
				&lt;version&gt;2.5.1&lt;/version&gt;
				&lt;inherited&gt;true&lt;/inherited&gt;
				&lt;configuration&gt;
					&lt;source&gt;1.7&lt;/source&gt;
					&lt;target&gt;1.7&lt;/target&gt;
				&lt;/configuration&gt;
			&lt;/plugin&gt;
		&lt;/plugins&gt;
	&lt;/build&gt;

	&lt;dependencyManagement&gt;
		&lt;dependencies&gt;
			&lt;dependency&gt;
				&lt;groupId&gt;org.glassfish.jersey&lt;/groupId&gt;
				&lt;artifactId&gt;jersey-bom&lt;/artifactId&gt;
				&lt;version&gt;${jersey.version}&lt;/version&gt;
				&lt;type&gt;pom&lt;/type&gt;
				&lt;scope&gt;import&lt;/scope&gt;
			&lt;/dependency&gt;
		&lt;/dependencies&gt;
	&lt;/dependencyManagement&gt;

	&lt;dependencies&gt;
		&lt;dependency&gt;
			&lt;groupId&gt;org.glassfish.jersey.containers&lt;/groupId&gt;
			&lt;artifactId&gt;jersey-container-servlet-core&lt;/artifactId&gt;
		
		&lt;/dependency&gt;

		&lt;dependency&gt;
			&lt;groupId&gt;javax.xml.bind&lt;/groupId&gt;
			&lt;artifactId&gt;jaxb-api&lt;/artifactId&gt;
			&lt;version&gt;2.1&lt;/version&gt;
			&lt;scope&gt;provided&lt;/scope&gt;
		&lt;/dependency&gt;

		&lt;dependency&gt;
			&lt;groupId&gt;org.glassfish.jersey.inject&lt;/groupId&gt;
			&lt;artifactId&gt;jersey-hk2&lt;/artifactId&gt;
		&lt;/dependency&gt;

	&lt;/dependencies&gt;
	&lt;properties&gt;
		&lt;jersey.version&gt;3.0.0-M1&lt;/jersey.version&gt;
		&lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt;
	&lt;/properties&gt;
&lt;/project&gt;

Alien.java

 package com.rest.restdemo;
 import javax.xml.bind.annotation.XmlRootElement;
 
 @XmlRootElement 
 public class Alien { 	
 private String name; 	
 private int points; 	
 public String getName() { 		
 return name; 	
 } 	
 public void setName(String name) { 		
  this.name = name; 	
 } 	
 public int getPoints()
 { 		
    return points; 
 } 	
 public void setPoints(int points) 
 {
 		this.points = points; 	
 }
}

AlienResource.java

package com.rest.restdemo;
import jakarta.ws.rs.GET;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.MediaType;
@Path(&quot;aliens&quot;)

public class AlienResource {
	
	@GET
	@Produces(MediaType.APPLICATION_XML)
	public Alien getAlien() {
	
		Alien a=new Alien();
		a.setName(&quot;Sam&quot;);
		a.setPoints(60);
		return a;
	}
}

web.xml

&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
&lt;web-app version=&quot;2.5&quot; xmlns=&quot;http://java.sun.com/xml/ns/javaee&quot;
 xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
  xsi:schemaLocation=&quot;http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd&quot;&gt;
    &lt;servlet&gt;
        &lt;servlet-name&gt;Jersey Web Application&lt;/servlet-name&gt;
        &lt;servlet-class&gt;org.glassfish.jersey.servlet.ServletContainer&lt;/servlet-class&gt;
        &lt;init-param&gt;
            &lt;param-name&gt;jersey.config.server.provider.packages&lt;/param-name&gt;
            &lt;param-value&gt;com.rest.restdemo&lt;/param-value&gt;
        &lt;/init-param&gt;
        &lt;load-on-startup&gt;1&lt;/load-on-startup&gt;
    &lt;/servlet&gt;
    &lt;servlet-mapping&gt;
        &lt;servlet-name&gt;Jersey Web Application&lt;/servlet-name&gt;
        &lt;url-pattern&gt;/webapi/*&lt;/url-pattern&gt;
    &lt;/servlet-mapping&gt;
&lt;/web-app&gt;

When i am launching this on browser i am getting INTERNAL SERVER ERROR-500

Please help me how to handle INTERNAL SERVER ERROR during run time in REST. Am i missing on some dependencies?

答案1

得分: 0

你的pom中是否有jax-rs依赖？

<dependency>
   <groupId>javax.ws.rs</groupId>
   <artifactId>javax.ws.rs-api</artifactId>
</dependency>
英文:

Do you have jax-rs dependency in your pom?

&lt;dependency&gt;
   &lt;groupId&gt;javax.ws.rs&lt;/groupId&gt;
   &lt;artifactId&gt;javax.ws.rs-api&lt;/artifactId&gt;
&lt;/dependency&gt;

huangapple
  • 本文由 发表于 2020年5月4日 16:51:30
  • 转载请务必保留本文链接：https://java.coder-hub.com/61588402.html
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