HTTP状态500 - servlet jersey-serlvet的Servlet.init（）引发异常？

问题描述：

我想用Maven和Tomcat使用Jersey来创建Web服务RESTFUL。当我执行我的web服务时，会抛出一些异常并且不起作用。HTTP状态500 - servlet jersey-serlvet的Servlet.init（）引发异常？

我该如何解决？

URL

http://localhost:8080/FerpaWS/ws/cliente

服务

package br.com.ferpa.ws; 

import javax.ws.rs.Consumes; 
import javax.ws.rs.GET; 
import javax.ws.rs.Path; 
import javax.ws.rs.core.MediaType; 
import javax.ws.rs.core.Response; 
import org.json.JSONObject; 

@Path("/") 
public class Cliente { 

    @GET 
    @Path("/cliente") 
    @Consumes(MediaType.APPLICATION_JSON) 
    public Response getNome(){ 
     JSONObject obj = new JSONObject(); 
     obj.put("nome", "fernando paiva"); 
     return Response.status(200).entity(obj.toString()).build(); 
    }  
}

的web.xml

<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"> 

    <display-name>FerpaWS</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-serlvet</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>br.com.ferpa.ws</param-value> 
     </init-param> 
     <load-on-startup>1</load-on-startup> 
    </servlet> 

    <servlet-mapping> 
     <servlet-name>jersey-serlvet</servlet-name> 
     <url-pattern>/ws/*</url-pattern> 
    </servlet-mapping> 
</web-app>

的pom.xml

<dependencies> 
     <dependency> 
      <groupId>javax</groupId> 
      <artifactId>javaee-web-api</artifactId> 
      <version>7.0</version> 
      <scope>provided</scope> 
     </dependency> 

     <!-- WS --> 
     <dependency> 
      <groupId>asm</groupId> 
      <artifactId>asm</artifactId> 
      <version>3.3.1</version> 
     </dependency> 

     <dependency> 
      <groupId>com.sun.jersey</groupId> 
      <artifactId>jersey-core</artifactId> 
      <version>1.19</version> 
     </dependency> 

     <dependency> 
      <groupId>com.sun.jersey</groupId> 
      <artifactId>jersey-server</artifactId> 
      <version>1.19</version> 
     </dependency> 

     <dependency> 
      <groupId>javax.ws.rs</groupId> 
      <artifactId>jsr311-api</artifactId> 
      <version>1.1.1</version> 
     </dependency> 

     <dependency> 
      <groupId>com.sun.jersey</groupId> 
      <artifactId>jersey-json</artifactId> 
      <version>1.19</version> 
     </dependency> 

     <dependency> 
      <groupId>com.sun.jersey</groupId> 
      <artifactId>jersey-bundle</artifactId> 
      <version>1.14</version> 
     </dependency> 

     <dependency> 
      <groupId>org.json</groupId> 
      <artifactId>json</artifactId> 
      <version>20141113</version> 
     </dependency> 

     <dependency> 
      <groupId>org.glassfish</groupId> 
      <artifactId>javax.json</artifactId> 
      <version>1.0.4</version> 
     </dependency> 

     <dependency> 
      <groupId>com.googlecode.json-simple</groupId> 
      <artifactId>json-simple</artifactId> 
      <version>1.1</version> 
     </dependency> 

     <dependency> 
      <groupId>com.sun.jersey.contribs</groupId> 
      <artifactId>jersey-multipart</artifactId> 
      <version>1.8</version> 
     </dependency> 

    </dependencies>

异常

exception 

javax.servlet.ServletException: Servlet.init() for servlet jersey-serlvet threw exception 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1086) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:659) 
    org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1558) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1515) 
    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) 
root cause 

java.lang.IllegalAccessError: tried to access method com.sun.jersey.core.reflection.ReflectionHelper.getContextClassLoader()Ljava/lang/ClassLoader; from class com.sun.jersey.spi.scanning.AnnotationScannerListener 
    com.sun.jersey.spi.scanning.AnnotationScannerListener.<init>(AnnotationScannerListener.java:92) 
    com.sun.jersey.spi.scanning.PathProviderScannerListener.<init>(PathProviderScannerListener.java:59) 
    com.sun.jersey.api.core.ScanningResourceConfig.init(ScanningResourceConfig.java:79) 
    com.sun.jersey.api.core.PackagesResourceConfig.init(PackagesResourceConfig.java:104) 
    com.sun.jersey.api.core.PackagesResourceConfig.<init>(PackagesResourceConfig.java:78) 
    com.sun.jersey.api.core.PackagesResourceConfig.<init>(PackagesResourceConfig.java:89) 
    com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:700) 
    com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:678) 
    com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:203) 
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:374) 
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:557) 
    javax.servlet.GenericServlet.init(GenericServlet.java:158) 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1086) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:659) 
    org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1558) 
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1515) 
    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)

@peeskittet我有类似的问题，但我怎么能删除依赖Javaee的建议。任何建议。谢谢 – 2015-09-12 12:04:14

检查解决方案[这里]（http://stackoverflow.com/questions/22265649/jersey2-sample-rest-service-failing）谈论不一致的依赖关系 – 2016-06-07 10:32:01

答

添加Maven依赖于部署大会或刚刚干净，并建立你的项目。

该项目只需右击

属性

部署大会

添加

这将打开另一个窗口，在选择

Java构建路径条目

单击下一步

答

我看到一个问题，在您的代码

@Path("/") <--- here 
public class Cliente { 

    @GET 
    @Path("/cliente")

根据你的代码，访问getNome方法的URL会

http://localhost:8080/FerpaWS/ws//cliente

但是，您正在访问

http://localhost:8080/FerpaWS/ws/cliente

所以，要么你删除@Path("/")或命名@Path("/app")。所以，最后的网址将是

http://localhost:8080/FerpaWS/ws/app/cliente

HTTP状态500 - servlet jersey-serlvet的Servlet.init（）引发异常？

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