Java Servlet[Jersey REST Service]的Servlet.init（）引发异常_Java_Maven_Servlets_Jersey

Java Servlet[Jersey REST Service]的Servlet.init（）引发异常

java maven servlets jersey

Java Servlet[Jersey REST Service]的Servlet.init（）引发异常,java,maven,servlets,jersey,Java,Maven,Servlets,Jersey,我开始学习休息服务。这是我的第一个程序，但我遇到了这个问题。我只想打印一张“你好，世界”。我尝试搜索并应用其他解决方案，但它仍然抛出相同的异常异常和错误列表 SEVERE: Servlet.init() for servlet [Jersey REST Service] threw exception java.lang.IllegalArgumentException: Unsupported class file major version 59 at jersey.repa

我开始学习休息服务。这是我的第一个程序，但我遇到了这个问题。我只想打印一张“你好，世界”。我尝试搜索并应用其他解决方案，但它仍然抛出相同的异常

异常和错误列表

SEVERE: Servlet.init() for servlet [Jersey REST Service] threw exception
java.lang.IllegalArgumentException: Unsupported class file major version 59
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:201)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:179)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:165)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:289)
    at org.glassfish.jersey.server.internal.scanning.AnnotationAcceptingListener.process(AnnotationAcceptingListener.java:148)
    at org.glassfish.jersey.server.ResourceConfig.scanClasses(ResourceConfig.java:888)
    at org.glassfish.jersey.server.ResourceConfig._getClasses(ResourceConfig.java:842)
    at org.glassfish.jersey.server.ResourceConfig.getClasses(ResourceConfig.java:751)
    at org.glassfish.jersey.server.ResourceConfig$RuntimeConfig.<init>(ResourceConfig.java:1178)
    at org.glassfish.jersey.server.ResourceConfig$RuntimeConfig.<init>(ResourceConfig.java:1151)
    at org.glassfish.jersey.server.ResourceConfig.createRuntimeConfig(ResourceConfig.java:1147)
    at org.glassfish.jersey.server.ApplicationHandler$RuntimeConfigConfigurator.init(ApplicationHandler.java:182)
    at org.glassfish.jersey.server.ApplicationHandler.lambda$initialize$0(ApplicationHandler.java:290)
    at java.base/java.util.Arrays$ArrayList.forEach(Arrays.java:4203)
    at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:290)
    at org.glassfish.jersey.server.ApplicationHandler.<init>(ApplicationHandler.java:259)
    at org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:311)
    at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:154)
    at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:346)
    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.allocate(StandardWrapper.java:761)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.base/java.lang.Thread.run(Thread.java:832)

May 03, 2021 10:55:40 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Allocate exception for servlet [Jersey REST Service]
java.lang.IllegalArgumentException: Unsupported class file major version 59
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:201)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:179)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:165)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:289)
    at org.glassfish.jersey.server.internal.scanning.AnnotationAcceptingListener.process(AnnotationAcceptingListener.java:148)
    at org.glassfish.jersey.server.ResourceConfig.scanClasses(ResourceConfig.java:888)
    at org.glassfish.jersey.server.ResourceConfig._getClasses(ResourceConfig.java:842)
    at org.glassfish.jersey.server.ResourceConfig.getClasses(ResourceConfig.java:751)
    at org.glassfish.jersey.server.ResourceConfig$RuntimeConfig.<init>(ResourceConfig.java:1178)
    at org.glassfish.jersey.server.ResourceConfig$RuntimeConfig.<init>(ResourceConfig.java:1151)
    at org.glassfish.jersey.server.ResourceConfig.createRuntimeConfig(ResourceConfig.java:1147)
    at org.glassfish.jersey.server.ApplicationHandler$RuntimeConfigConfigurator.init(ApplicationHandler.java:182)
    at org.glassfish.jersey.server.ApplicationHandler.lambda$initialize$0(ApplicationHandler.java:290)
    at java.base/java.util.Arrays$ArrayList.forEach(Arrays.java:4203)
    at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:290)
    at org.glassfish.jersey.server.ApplicationHandler.<init>(ApplicationHandler.java:259)
    at org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:311)
    at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:154)
    at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:346)
    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.allocate(StandardWrapper.java:761)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.base/java.lang.Thread.run(Thread.java:832)

我使用ApacheTomcatV9.0.44，如下图所示

此程序会引发什么异常？基本上，您是使用Java 15格式编译类，但使用的是早期版本<代码>不支持的类文件主版本59表示运行时不支持编译类时使用的Java版本。因此，请确保编译了适用于早期版本的类。

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>net.code.hellorest</groupId>
  <artifactId>HelloRESTServices</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <dependencies>
    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet</artifactId>
        <version>2.29.1</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.inject</groupId>
        <artifactId>jersey-hk2</artifactId>
        <version>2.29.1</version>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.1</version>
        <configuration>
          <release>15</release>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>3.2.3</version>
      </plugin>
    </plugins>
  </build>
</project>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
  <display-name>HelloRESTServices</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <servlet-name>Jersey REST Service</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.javacode.ws</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Jersey REST Service</servlet-name>
    <url-pattern>/rest/*</url-pattern>
  </servlet-mapping>
</web-app>

package com.javacode.ws;

import javax.ws.rs.Path;
import javax.ws.rs.GET;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;


@Path("/hello")
public class HelloREST {
    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String printHello() {
        return "Hello, this is a fist greeting";
    }
}