java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet (即使我有 spring-webmvc.jar)
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java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet (even i have spring-webmvc.jar)
提问by Srikanth
I'm trying to create scratch level project with spring mvc and hibernate. in that situation i downloaded all jar related to spring and hibernate. While running my project i'm getting below error.
我正在尝试使用 spring mvc 和 hibernate 创建临时项目。在那种情况下，我下载了所有与 spring 和 hibernate 相关的 jar。在运行我的项目时，我遇到了以下错误。
java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
But as my knowledge DipatcherServletclass will available in spring-webmvc.jar, i added this jar also.
Please see the below code and Help me
但是由于我的知识DipatcherServlet课程将在 中可用spring-webmvc.jar，因此我也添加了这个 jar。请查看下面的代码并帮助我
web.xml
网页.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"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>Spring Hello World</display-name>
<welcome-file-list>
<welcome-file>/</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>springDispatcher</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/spring-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springDispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<context-param>
<param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
<param-value>true</param-value>
</context-param>
</web-app>
spring-context.xml
spring-context.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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:property-placeholder location="classpath:resources/database.properties" />
<context:component-scan base-package="user.controller" />
<mvc:annotation-driven />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${database.driver}" />
<property name="url" value="${database.url}" />
<property name="username" value="${database.user}" />
<property name="password" value="${database.password}" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>user.model.Employee</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
</props>
</property>
</bean>
<bean id="hibernateTransactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
</beans>
pom.xml
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.myproject</groupId>
<artifactId>addaroot</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>addaroot Maven Webapp</name>
<url>http://maven.apache.org</url>
<!-- <build>
<finalName>${project.artifactId}-${project.version}</finalName>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build> -->
<!-- <properties>
<org.slf4j.version>1.6.4</org.slf4j.version>
<org.springframework.version>3.1.0.RELEASE</org.springframework.version>
</properties> -->
<properties>
<spring.version>3.1.2.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>javax.servlet.jsp.jstl</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<!-- <dependency>
<groupId>spring</groupId>
<artifactId>spring</artifactId>
<version>${spring.version}</version>
</dependency> -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${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-asm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</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-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- <dependency>
<groupId>org.springframework</groupId>
<artifactId>org.springframework.web.servlet</artifactId>
<version>3.0.5.RELEASE</version>
</dependency> -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<!-- Hibernate dependencies. -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate</artifactId>
<version>3.1.3</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.4.0.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.8.Final</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.6</version>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.3</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>maven2-repository.dev.java.net</id>
<name>Java.net Repository for Maven</name>
<url>http://download.java.net/maven/2/</url>
<layout>default</layout>
</repository>
<!-- <repository>
<id>maven-restlet</id>
<name>Public online Restlet repository</name>
<url>http://maven.restlet.org</url>
</repository> -->
</repositories>
<build>
<finalName>addaroot</finalName>
</build>
</project>
console
安慰
SEVERE: Servlet /addaroot threw load() exception
java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:532)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:514)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:142)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1088)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5176)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5460)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:663)
at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1642)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Feb 21, 2014 10:46:03 AM org.apache.catalina.startup.HostConfig deployDescriptor
采纳答案by Monis Majeed
you can user very well localSessionFactory as there is no harm and can use sessionfactory like this
@Autowired
private SessionFactory sessionFactory;
您可以很好地使用 localSessionFactory，因为没有任何危害，并且可以像这样使用 sessionfactory
@Autowired private SessionFactory sessionFactory；
@Override
public void createSection(Section section) {
sessionFactory.getCurrentSession().save(section);
}
@Override
public void deleteSection(Section section) {
sessionFactory.getCurrentSession().delete(section);
}
@Override
public Section findBySectionID(int id) {
Query query = sessionFactory.getCurrentSession().createQuery("from Section
where id = " + id);
return (Section) query.list().get(0);
}
And hibernate.cfg.xml.this is the xml to tell which and where are my model objects[java
model database mapping objects]
和 hibernate.cfg.xml.this 是 xml 来告诉我的模型对象[java
模型数据库映射对象]
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate
Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<mapping class="something.packake.model.modelcalssName1" />
<mapping class="something.packake.model.modelcalssName2" />
</session-factory>
</hibernate-configuration>
回答by Bhaskar
In case you have already added the jar, check the location where you have added it. The usual way is to have a lib folder and add all your jars inside the lib folder. A word of caution here, do not forget to add all the jars of lib into the build path of your class. You can probably do it from the project explorer window itself by selecting each jar or can import the folder and its contents using the following hierarchy: Project -> Prefrences -> Build Path.
如果您已经添加了 jar，请检查添加它的位置。通常的方法是有一个 lib 文件夹并将所有 jars 添加到 lib 文件夹中。这里要提醒一句，不要忘记将 lib 的所有 jar 添加到类的构建路径中。您可以通过选择每个 jar 从项目资源管理器窗口本身执行此操作，也可以使用以下层次结构导入文件夹及其内容：项目 -> 首选项 -> 构建路径。
回答by Monis Majeed
Might be you are missing viewClass try with this
可能你缺少 viewClass 试试这个
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
and you can update spring dependency as
你可以将 spring 依赖更新为
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.2.1.RELEASE</version>
</dependency>
and check your jar files have been dowbloaded in your .m2 folder / check it in lib folder
并检查您的 jar 文件是否已下载到您的 .m2 文件夹中/在 lib 文件夹中检查它
回答by Monis Majeed
Can you modify your pom and spring-context.xml with these, I am sure it will help you
你能用这些修改你的 pom 和 spring-context.xml，我相信它会帮助你
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:annotation-config />
<context:component-scan base-package="your base package" />
<bean id="Check" class="yourbase.check.ModelClassfile">
</bean>
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/jdbc.properties" />
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"
p:driverClassName="${jdbc.driverClassName}"
p:url="${jdbc.databaseurl}" p:username="${jdbc.username}"
/>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation">
<value>classpath:hibernate.cfg.xml</value>
</property>
<property name="configurationClass">
<value>org.hibernate.cfg.AnnotationConfiguration</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${jdbc.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<tx:annotation-driven />
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
</beans>
------pom.xml-----
------pom.xml-----
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>school</groupId>
<artifactId>management</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<description></description>
<build>
<finalName>management</finalName>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.0.1</version>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>3.3.2.GA</version>
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
<version>1.1</version>
</dependency>
<!-- dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId>
<version>1.4.2</version> </dependency -->
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.10</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>20030825.184428</version>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>20030825.183949</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.2.1.RELEASE</version>
</dependency>
</dependencies>
<properties>
<org.springframework.version>3.2.1.RELEASE</org.springframework.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
</project>
---------------------------Please modify your spring-context file as mentioned----- ---------and check location of your spring-context file you have given correctly in web.xml
---------------------------请修改您提到的 spring-context 文件----- ---------并检查您在 web.xml 中正确给出的 spring-context 文件的位置
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-servlet.xml</param-value>
</init-param>
回答by Aniket Thakur
In my case I used Ivy and I faced the same issue. You can do either of the two
在我的情况下，我使用了常春藤，我遇到了同样的问题。你可以做这两个
- Either move your libraries to WEB-INF/lib. Because this is the folder from where Eclipse searches for corresponding jars. OR
- Let Eclipse know that it can search the jars from ivy library folder which is not same as WEB-INF/libi.e Change java build path in Deployment Assembly via Project properties.
- 要么将您的库移动到WEB-INF/lib。因为这是 Eclipse 从中搜索相应 jar 的文件夹。或者
- 让 Eclipse 知道它可以从与WEB-INF/lib不同的 ivy 库文件夹中搜索 jar，即通过项目属性更改部署程序集中的 java 构建路径。
For 2nd approach you can refer to my personal blog post - details post with screenshots. Or you can also go through similar question I asked here.
对于第二种方法，您可以参考我的个人博客文章 -带有屏幕截图的详细信息文章。或者你也可以通过我在这里问的类似问题。
回答by Vivek Pal
Check that your maven dependencies are added in deployment path.
检查您的 Maven 依赖项是否已添加到部署路径中。
for doing that follow the following steps. 1. Go to properties of your project. 2. click on deployement assembly. 3. click add button on right. 4. then goto java build path. 5. then it will show maven dependency add it. 6. try again to run your project.
为此，请执行以下步骤。1. 转到项目的属性。2. 单击部署程序集。3.点击右侧的添加按钮。4.然后转到java构建路径。5.然后它会显示maven依赖添加它。6. 再次尝试运行您的项目。
回答by AndreFontaine
I solved it in a straightforward way:
我以一种直接的方式解决了它：
- Go to Servers view.
- Select your server and right click on "Clean..."
- Rebuild application.
- 转到服务器视图。
- 选择您的服务器并右键单击“清理...”
- 重建应用程序。
回答by lawrence
depending on the version of spring you are using, forinstance if its version 4X them avoid servlet-dispatcher declarations in your web.xml file!
取决于您使用的 spring 版本，例如，如果它的版本是 4X，它们将避免在 web.xml 文件中使用 servlet-dispatcher 声明！
回答by Sohbati
I know this is very late but maybe someone face with it.
我知道这已经很晚了，但也许有人会面对它。
i had this problem too.
我也有这个问题。
my project was not a maven project.
我的项目不是 Maven 项目。
i solved this by :
我通过以下方式解决了这个问题：
1- right click on project and select "properties".
1- 右键单击项目并选择“属性”。
2- select "Deployment Assembly".
2- 选择“部署程序集”。
3- click add button.
3-单击添加按钮。
4- select "Java Build Path Entries".
4- 选择“Java 构建路径条目”。
5- click next and select all jars.
5-单击下一步并选择所有罐子。
6- Finish .
6-完成。
