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Impossible de charger la classe de pilote JDBC [com.mysql.jdbc.Driver]

Donc, voici la structure de mon projet:

 enter image description here

À l'intérieur de cats-application, j'ai la classe CatsDAO où je tente de @AutowireDataSource

import javax.sql.DataSource;

@Repository
public class CatsDAO {

    @Autowired
    private DataSource dataSource;

    public Cat getCat(String name) {
        String sql = "SELECT * FROM cats WHERE name = ?";

        Connection conn = null;
        try {
            ...
        } catch (SQLException e) {
            throw new RuntimeException(e);
        } finally {
            ...
        }
    }
}

Et voici mon applicationContext.xml dans cats-webapp:

<?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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <context:component-scan base-package="ninja.majewski"/>
    <context:annotation-config/>
    <mvc:annotation-driven/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/cats"/>
        <property name="username" value="root"/>
        <property name="password" value=""/>
    </bean>

</beans>

Et voici mon fichier cats-applicationpom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <parent>
        <artifactId>cats</artifactId>
        <groupId>ninja.majewski</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cats-application</artifactId>

    <dependencies>
        <dependency>
            <groupId>ninja.majewski</groupId>
            <artifactId>cats-domain</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-Java</artifactId>
            <version>6.0.2</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.Apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

Et mon fichier cats-webapppom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<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>groupId</groupId>
    <artifactId>cats-webapp</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>ninja.majewski</groupId>
            <artifactId>cats-application</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.2.4.Final</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.Apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

Mais lorsque j'essaie de l'exécuter sur le serveur, j'obtiens cette exception:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'catsDAO': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.sql.DataSource ninja.majewski.cats.CatsDAO.dataSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is Java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.Java:334)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.Java:1214)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.Java:543)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.Java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.Java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.Java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.Java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.Java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.Java:772)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.Java:839)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.Java:538)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.Java:444)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.Java:326)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.Java:107)
    at org.Apache.catalina.core.StandardContext.listenerStart(StandardContext.Java:4994)
    at org.Apache.catalina.core.StandardContext.startInternal(StandardContext.Java:5492)
    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:649)
    at org.Apache.catalina.startup.HostConfig.manageApp(HostConfig.Java:1762)
    at Sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at Sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.Java:62)
    at Sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.Java:43)
    at Java.lang.reflect.Method.invoke(Method.Java:497)
    at org.Apache.Tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.Java:301)
    at com.Sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.Java:819)
    at com.Sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.Java:801)
    at org.Apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.Java:618)
    at org.Apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.Java:565)
    at Sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at Sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.Java:62)
    at Sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.Java:43)
    at Java.lang.reflect.Method.invoke(Method.Java:497)
    at org.Apache.Tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.Java:301)
    at com.Sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.Java:819)
    at com.Sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.Java:801)
    at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.Java:1468)
    at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.Java:76)
    at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.Java:1309)
    at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.Java:1401)
    at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.Java:829)
    at Sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at Sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.Java:62)
    at Sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.Java:43)
    at Java.lang.reflect.Method.invoke(Method.Java:497)
    at Sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.Java:323)
    at Sun.rmi.transport.Transport$1.run(Transport.Java:200)
    at Sun.rmi.transport.Transport$1.run(Transport.Java:197)
    at Java.security.AccessController.doPrivileged(Native Method)
    at Sun.rmi.transport.Transport.serviceCall(Transport.Java:196)
    at Sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.Java:568)
    at Sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.Java:826)
    at Sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$256(TCPTransport.Java:683)
    at Java.security.AccessController.doPrivileged(Native Method)
    at Sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.Java:682)
    at Java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.Java:1142)
    at Java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.Java:617)
    at Java.lang.Thread.run(Thread.Java:745)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.sql.DataSource ninja.majewski.cats.CatsDAO.dataSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is Java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.Java:573)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.Java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.Java:331)
    ... 58 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is Java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.Java:1518)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.Java:1226)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.Java:543)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.Java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.Java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.Java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.Java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.Java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.Java:1192)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.Java:1116)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.Java:1014)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.Java:545)
    ... 60 more
Caused by: org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property 'driverClassName' threw exception; nested exception is Java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.jdbc.Driver]
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.Java:121)
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.Java:75)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.Java:1514)
    ... 71 more

Qu'est-ce que j'oublie ici?

javamysqlspringspring-mvcjdbc
6
Krzysztof Majewski

Vous avez probablement ignoré certaines dépendances:

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-Java</artifactId>
    <version>5.1.6</version>
</dependency>
15
Mateusz Stefaniak

J'ai eu le même problème. J'ai suivi ces étapes dans l'éditeur IntelliJ.

Pas

  1. Cliquez sur Fichier et cliquez sur l'élément de menu "Structure du projet".
  2. Cliquez sur "Artefacts" dans la barre de navigation de gauche.
  3. Sélectionnez toutes les bibliothèques dans la liste "Eléments disponibles".
  4. Faites un clic droit et cliquez sur "Insérer dans le bouton WEB-INF/lib.
  5. Cliquez sur les boutons Appliquer et OK.
  6. Redéployez le projet.

Copié à partir de Comment résoudre Spring ClassNotFoundException dans IntelliJ (Java)? vidéo. 

3
Isuru

Résolution du problème après la dégradation de la version du connecteur SQL JDBC de 5.1.6 à 5.1.31.

1
Kaushal Kachiya

Vous devez ajouter mysql-connector-Java jar.

Ajoutez-le à votre chemin de construction ou à votre pom.xml.

J'espère que ça aide.. :)

0
Sarat Chandra

Vérifiez votre répertoire pom.xml ou lib pour le fichier mysql-connector-Java.jar.

vous pouvez ajouter l'extrait de code ci-dessous dans votre pom.xm

 <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-Java</artifactId>
    <version>5.1.6</version>
 </dependency>
0
M Pankaj Arun