java.lang.NoSuchMethodError: javax.servlet.ServletContext.getEffectiveSessionTrackingModes()Ljava/util/Set;

发布于 2024-12-28 13:32:55 字数 1574 浏览 0 评论 0原文

我想要一个 servlet 来处理来自独立 java 程序的输入。如何在jboss中部署这个servlet。我将 servlet.class 文件放在 WEB-INF/classes 中，并在 web.xml 中将 servlet url 映射为“.do”。从我的 Java 客户端程序中，我使用 URL 对象打开了与 servlet 的连接。使用 localhost:8080/.do。但我收到以下错误：

  ERROR [org.apache.catalina.connector.CoyoteAdapter] An exception or error occurred in the container during the request processing: 
  java.lang.NoSuchMethodError: javax.servlet.ServletContext.getEffectiveSessionTrackingModes()Ljava/util/Set;
            at
     org.apache.catalina.connector.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:567)
            at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359)
            at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)
            at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:654)
            at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951)

web.xml 文件内容：

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "java.sun.com/j2ee/dtds/web-app_2_2.dtd">; 
<web-app> 
     <servlet>
         <servlet-name>ReverseServlet</servlet-name> 
         <servlet-class>ReverseServlet</servlet-class> 
     </servlet> 
     <servlet-mapping>
          <servlet-name>ReverseServlet</servlet-name> 
          <url-pattern>/*.do</url-pattern> 
     </servlet-mapping> 
</web-app>

原文

i want to have a servlet to process inputs from a standalone java program. how to deploy this servlet in jboss. I put the servlet.class file in WEB-INF/classes and in web.xml i gave the servlet url mapping as ".do". From my Java client program i opened connected to the servlet using a URL object. using localhost:8080/.do. BUT i am getting the folowing error:

  ERROR [org.apache.catalina.connector.CoyoteAdapter] An exception or error occurred in the container during the request processing: 
  java.lang.NoSuchMethodError: javax.servlet.ServletContext.getEffectiveSessionTrackingModes()Ljava/util/Set;
            at
     org.apache.catalina.connector.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:567)
            at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359)
            at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)
            at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:654)
            at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951)

web.xml file contents :

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "java.sun.com/j2ee/dtds/web-app_2_2.dtd">; 
<web-app> 
     <servlet>
         <servlet-name>ReverseServlet</servlet-name> 
         <servlet-class>ReverseServlet</servlet-class> 
     </servlet> 
     <servlet-mapping>
          <servlet-name>ReverseServlet</servlet-name> 
          <url-pattern>/*.do</url-pattern> 
     </servlet-mapping> 
</web-app>

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荒岛晴空 2025-01-04 13:32:55

java.lang.NoSuchMethodError: javax.servlet.ServletContext.getEffectiveSessionTrackingModes()Ljava/util/Set;

引入了该方法在 Servlet 3.0 中。此错误至少可能有以下原因：

您的 web.xml 未声明至少符合 Servlet 3.0。
您的 servlet 容器不至少支持 Servlet 3.0。
您在 /WEB-INF/lib 中有旧版本的 servlet 容器特定库。

要解决此问题，

确保您的 web.xml 根声明符合 Servlet 3.0：


<网络应用程序 
    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_3_0.xsd"
    版本=“3.0”>

确保您部署到 Servlet 3.0 兼容容器。对于 JBoss AS，至少版本为 6.0.0。
确保 /WEB-INF/lib 中没有这些库。他们不属于那里。这是初学者在“解决”IDE 中遇到的编译错误时常犯的错误。另请参阅如何导入 javax我的 Eclipse 项目中是否有 .servlet API？

您已声明您的 web.xml 符合 Servlet 2.2。这绝对是错误的。相应地修复它。

java.lang.NoSuchMethodError: javax.servlet.ServletContext.getEffectiveSessionTrackingModes()Ljava/util/Set;

This method is introduced in Servlet 3.0. This error can have at least the following causes:

Your web.xml is not declared conform at least Servlet 3.0.
Your servlet container does not support at least Servlet 3.0.
You have servlet container specific libraries of an older version in /WEB-INF/lib.

To solve this problem,

Ensure that your web.xml root declaration conforms Servlet 3.0:

<?xml version="1.0" encoding="UTF-8"?>
<web-app 
    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_3_0.xsd"
    version="3.0">

    <!-- Config here. -->

</web-app>

Ensure that you're deploying to a Servlet 3.0 compatible container. In case of JBoss AS that would be at least version 6.0.0.
Ensure that you don't have those libraries in /WEB-INF/lib. They do not belong there. This is a common beginner's mistake to "solve" compilation errors they faced in their IDE. See also How do I import the javax.servlet API in my Eclipse project?

You've declared your web.xml conform Servlet 2.2. This is definitely wrong. Fix it accordingly.

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