java.lang.ClassNotFoundException：org.springframework.web.servlet.DispatcherServlet

87

我正在使用spring 3.1.0.RELEASE，我的servlet容器是tomcat 7，我的IDE是eclipse indigo ，并且包含DispatcherServlet的jar spring-webmvc-3.1.0.RELEASE.jar 位于lib文件夹中，但是当运行该应用程序，我得到了例外：

java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1523)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:525)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:507)
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:126)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1099)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1043)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4957)
    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5284)
    at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5279)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

please advise why i am getting this exception, and how to fix it.

EDIT: following are my configuration files:

1- .springBeans:

<?xml version="1.0" encoding="UTF-8"?>
<beansProjectDescription>
    <version>1</version>
    <pluginVersion><![CDATA[2.9.0.201203011806-RELEASE]]></pluginVersion>
    <configSuffixes>
        <configSuffix><![CDATA[xml]]></configSuffix>
    </configSuffixes>
    <enableImports><![CDATA[false]]></enableImports>
    <configs>
        <config>src/main/webapp/WEB-INF/checkout-servlet.xml</config>
    </configs>
    <configSets>
    </configSets>
</beansProjectDescription>

2- web.xml:

<web-app>
  <display-name>Checkout</display-name>

  <servlet>
    <servlet-name>checkout</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>checkout</servlet-name>
    <url-pattern>*.action</url-pattern>
  </servlet-mapping>

</web-app>

3- checkout-servlet.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">

    <context:component-scan base-package="com.myapp"/>

    <bean id="myService" class="com.myapp.MyService"/>

</beans>

also when trying to access any page in the application, i get the exception:

HTTP Status 404 - Servlet checkout is not available

type Status report

message Servlet checkout is not available

description The requested resource (Servlet checkout is not available) is not available.
Apache Tomcat/7.0.22
spring  maven  spring-mvc  maven-2 
— Mahmoud Saleh
source
can you post your spring config files and tell us what app-server is it supposed to run on?
— Gergely Szilagyi
@Gergely Szilagyi, i updated the question.
— Mahmoud Saleh
deleted my answer, because it wasn't useful. sorry :(
— Gergely Szilagyi
@iNan, i am using eclipse indigo
— Mahmoud Saleh
1
I believe it is not directly a CNF on DispatcherServlet but a dependent class has thrown an error. Check if you see any other nested exception.
— adarshr

Answers:

248

You need to add the "Maven Dependency" in the Deployment Assembly

  • right click on your project and choose properties.
  • click on Deployment Assembly.
  • click add
  • click on "Java Build Path Entries"
  • select Maven Dependencies"
  • click Finish.

Rebuild and deploy again

Note: This is also applicable for non maven project.

— krakos
source
Nice - I was confused to see even after adding the proper dependency in my pom.xml didn't solved the error until I followed as above..
— srinivas
Nice.. perfect solution
— Prasad V S
1
Why does this work? I mean, shouldn't all maven dependencies be available? If I was using the Tomcat7 pluging with tomcat7:run, how would this be accomplished?
— Johnny Bigoode
Works like charm!
— yrazlik
This is also applicable for non maven project.!! I created a maven project and i got same problem. this solution worked for me.
— Bandham Manikanta
33

Two possible answers:

1- You did not include spring-beans and spring-context jars in your lib. If you are using maven (which will help a lot) those two lines will be enough

<dependency>
 <groupId>org.springframework</groupId>
  <artifactId>spring-context</artifactId>
   <version>3.1.0.RELEASE</version>
</dependency>
<dependency>
 <groupId>org.springframework</groupId>
  <artifactId>spring-webmvc</artifactId>
   <version>3.1.0.RELEASE</version>
</dependency>

2- The necessary jars are in your classpath but are not deployed on tomcat.

— Serkan Arıkuşu
source
Nice that you solved the problem, but I do not think that it can be understood from your problem that you are using maven.
— Serkan Arıkuşu
1
maven is tagged in the question !
— Mahmoud Saleh
3
adding spring-webmvc to my pom.xml will solve the issue. Thanks.
— OO7
19

Hi guys I had the same problem with Idea Intellij and Spring 4 I fixed the problem and I wanted to share the answer with you.

I use tomcat 7 / idea intellij 13 / spring 4

pom.xml dependencies 

  <properties>
    <spring.version>4.0.5.RELEASE</spring.version>
  </properties>

  <dependencies>     
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
enter code here
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.2</version>
    </dependency>
        <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>
  </dependencies>

In idea Intellij you need to go to File -> Project Settings -> Artifacts. Then enter image description here

clean -> rebuild the project -> build the artifact and everything will be ok ...

— Adelin
source
You're a genius. Could you explain what difference it makes? How come Maven imports everything, but you still need to do that so it works?
— DMurta
@DMurta who said that maven exports everything?
— Adelin
12

This solves the problem for me. It's easy and pretty simply explained.

Step 1

  • Right click on project
  • Click on Properties

Step 2

  • Click on Deployment Assembly Tab in the
  • Click Add...

Step 3

  • Click on Java Build Path Entries

Step 4

  • Click on Maven Dependencies
  • Click Finish button

Step 5

  • Redeploy Spring MVC application to Tomcat again
  • Restart Tomcat
  • List item

classnotfoundexception

— Lycone
source
Would you reconsider the grade you gave to my proposition?
— Lycone
10

i found that in the deployment assembly, there was the entry:

[persisted container] org.maven.ide.eclipse.maven2_classpath_container

i removed it, and added the maven dependencies entry, and it works fine now.

— Mahmoud Saleh
source
5

If all of these advice doesn't work, you should re-create your Server (Tomcat or like that). That solved my problem.

— Chinbold Gansukh
source
5

Include below dependency in your pom.xml

<dependency>
 <groupId>org.springframework</groupId>
  <artifactId>spring-webmvc</artifactId>
   <version>{spring-version}</version>
</dependency>
— Victor
source
4

I was facing the same Issue. When I saw into maven repository .m2 folder(....m2\repository\org\springframework\spring-webmvc) in my local I found two 3.2.0.RELEASE folders. SO I removed one. Then I went to project, right click->properties->deployment essembly-> add maven dependencies. clean build and then restart the server. Then the DispatcherServlet got loaded.

— TKS
source
Yes, this resolved my issue too, any idea why it is required to add dependencies in deployment assembly in eclipse ?
— Freelancer
2

In my case I get this trouble after using the maven's update project utility. I tried all the workarounds you suggested but nothing seemed to work. At the end the solution was simply to remove the project from the server to ensure that it was clean, and add it again. Then it works, I hope this solution could help any of you.

— user2947452
source
2

You can use GlassFish server and the error will be resolved. I tried with tomcat7 and tomcat8 but this error was coming continuously but resolved with GlassFish. I think it's a problem with server.

These are the results with tomcat7: Results with tomcat7

Here are the results with GlassFish: Results with GlassFish

— Superb Saif
source
1

right click on your project and choose properties. click on Deployement Assembly. click add click on "Java Build Path Entries" select Maven Dependencies" click Finish.

— Vishal Thakur
source
1

It may be useful for someone, so I'll post it here. I was missing this dependency on my pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </exclusion>
    </exclusions>
</dependency>
— luizfzs
source
1
  1. Go to properties of Project which your working
  2. Choose the Deployment Assembly menu and Click on add button
  3. opt the Java Build Path Entries and Click on Maven Dependencies
  4. Build the project and run

enter image description here

— Lova Chittumuri
source
1
I don't have the Maven Dependencies option when i click on Java Build Path Entries.
— Muktadir Khan
i did not know in which aspect your asking this question. Please try to post new question.
— Lova Chittumuri
0

I solved by following these steps:

  • Right click in the project > Configure > Convert to Maven project
  • After the conversion, right click in the project > Maven > Update project

This fixes the "Deployment Assembly" settings of the project.

— leo
source
0

Move the jar files from your classpath to web-inf/lib, and run a new tomcat server.

— ajai kumar
source
0

I found a simple solution, Simply add your jars inside WEB-INF-->lib folder..

— Karthik
source
0

I had this same issue in WebSphere, but couldn't find a solution even though I verified the Spring dependencies were there and it ran in tomcat just fine. I ended up uninstalling the application and was still getting the error so I think WebSphere was hanging onto some corrupt instance.

To fix the issue I had to reinstall the application, stop it, uninstall it and then reinstall it.

— flip66
source
0

For me it was a mistake in the pom.xml - I'd set <scope>provided<scope> on my dependencies, and this was making them not get copied during the mvn package stage.

My symptoms were the error message the OP posted, and that the jars were not included in the WEB-INF/lib path inside the .war after package was run. When I removed the scope, the jars appeared in the output, and all loads up fine now.

— Dan Rayson
source
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