实例化servlet类org.glassfish.jersey.servlet.ServletContainer时出错

时间:2016-02-19 19:19:39

标签: rest servlets jersey

您好试着写一个简单的休息网络服务。并按照以下教程: http://www.tutorialspoint.com/restful/index.htm

但我得到了 HTTP状态500 - 实例化servlet类org.glassfish.jersey.servlet.ServletContainer时出错

例外:

<body>
        <h1>HTTP Status 500 - Error instantiating servlet class org.glassfish.jersey.servlet.ServletContainer</h1>
        <div class="line"></div>
        <p>
            <b>type</b> Exception report
        </p>
        <p>
            <b>message</b>
            <u>Error instantiating servlet class org.glassfish.jersey.servlet.ServletContainer</u>
        </p>
        <p>
            <b>description</b>
            <u>The server encountered an internal error that prevented it from fulfilling this request.</u>
        </p>
        <p>
            <b>exception</b>
        </p>
        <pre>javax.servlet.ServletException: Error instantiating servlet class org.glassfish.jersey.servlet.ServletContainer
    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:522)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Thread.java:745)
</pre>
        <p>
            <b>root cause</b>
        </p>
        <pre>java.lang.ClassNotFoundException: org.glassfish.jersey.servlet.ServletContainer
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308)
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1142)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)

以下是代码(与教程大致相同)

package com.abhi;

import java.util.List;

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

@Path("/UserService")
public class UserService {

   UserDao userDao = new UserDao();

   @GET
   @Path("/users")
   @Produces(MediaType.APPLICATION_XML)
   public List<User> getUsers(){
      return userDao.getAllUsers();
   }    
}

我的Web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <display-name>MyRestPrjct</display-name>
    <servlet>
        <servlet-name>Jersey RESTful 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.abhi</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>Jersey RESTful Application</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>
    <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>
</web-app>

4 个答案:

答案 0 :(得分:7)

我只是没有以适当的方式放置罐子。我没有将所需的jar放在webapps\MyRestPrjct\WEB-INF\lib中,而是将其放在webapps\MyRestPrjct\WEB-INF\lib\libs

我将罐子从libs移到lib后工作正常。

答案 1 :(得分:3)

将所有jar放在WEB-INF / lib文件夹中解决了我的问题。

答案 2 :(得分:2)

当我做同样的教程时,我也面临类似的问题,我发现的问题是web.xml中指定的servelt类是

org.glassfish.jersey.servlet.ServletContainer

但是当我在罐子中检查时,库中没有包含上述路径的包,所以我将其更改为现有的

com.sun.jersey.spi.container.servlet.ServletContainer

它解决了这个问题。

答案 3 :(得分:0)

当尝试从tutorialspoint运行相同的模块时,我也遇到了相同的异常。我所做的就是下载以下jar,并将其添加到项目中。很好。
jersey-common-2.0-m03.jar
jersey-server-2.0-m03.jar
jersey-container-servlet-core-2.28.jar