泽西岛 servlet 异常 tomcat 泽西岛

Question

我在尝试使用 Maven 将 servlet 部署到 Tomcat 时遇到问题；我一直在其他帖子中阅读有关此问题的信息，但 answers/suggestions.

仍然无法成功

无论我尝试什么，我都会遇到这个异常：

javax.servlet.ServletException: Servlet.init() for servlet Jersey Web Application threw exception org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745) root cause com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes. com.sun.jersey.server.impl.application.RootResourceUriRules.(RootResourceUriRules.java:99) com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1359) com.sun.jersey.server.impl.application.WebApplicationImpl.access0(WebApplicationImpl.java:180) com.sun.jersey.server.impl.application.WebApplicationImpl.f(WebApplicationImpl.java:799) com.sun.jersey.server.impl.application.WebApplicationImpl.f(WebApplicationImpl.java:795) com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795) com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790) com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:509) com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:339) com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605) com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207) com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:394) com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:577) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745)

这是我的 web.xml 文件：

<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
    <init-param>
    <param-name>
    com.sun.jersey.config.property.packages
    </param-name>
    <param-value>com.rest.example
    </param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>Jersey Web Application</servlet-name>
    <url-pattern>/rest/*</url-pattern>
</servlet-mapping>

还有我的pom.xml

<dependencies>
<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>asm.jar</artifactId>
    <version>20041228.180559</version>
</dependency>
<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>jersey-bundle.jar</artifactId>
    <version>1.19</version>
</dependency>
<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>jersey-server.jar</artifactId>
    <version>1.19</version>
</dependency>
<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>jersey-core.jar</artifactId>
    <version>1.8</version>
    <type>pom.lastUpdated</type>
</dependency>

sum.java 文件

package com.rest.example;

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

public class sum {
@Path("/hello")

@GET
@Produces(MediaType.TEXT_PLAIN)
public String sayHello() 
{
        return "Hello World";
    }

}

以防万一:

我已经尝试清理并再次构建它，但仍然没有任何变化；我错过了什么？谢谢。

Answer 1

错误信息：

The ResourceConfig instance does not contain any root resource classes.

<init-param>
    <param-name>com.sun.jersey.config.property.packages</param-name>
    <param-value>com.rest.example</param-value>
</init-param>

以上代码告诉 Jersey 扫描 com.rest.example 包中的 classes 注释为 @Provider 和 @Path 以便它可以注册它们。该错误告诉您在应用程序加载期间没有资源 classes 注册。原因：

public class sum {
@Path("/hello")

@Path 注释应该在 class 定义的 top 上，而不是 below。 Jersey 找不到资源 classes，因为 class.

上没有 @Path 注释

Answer 2

即使使用此设置，我也遇到了完全相同的问题并进入了 javax.servlet.ServletException: Servlet.init() for servlet [jersey-servlet] 抛出异常引起的 java.lang.ArrayIndexOutOfBoundsException: 14877

最后的问题是我对包不够具体，我的项目在主包目录中变大了。注意并将所有端点收集在项目中分开的包中。

泽西岛 servlet 异常 tomcat 泽西岛

Jersey servlet exception tomcat jersey

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