【问题标题】：Failed to load class of driverClassName mongodb.jdbc.MongoDriver未能加载 driverClassName mongodb.jdbc.MongoDriver 的类
【发布时间】：2018-08-22 00:39:19
【问题描述】：

谁能帮帮我。我现在在这里呆了 2 天。我正在使用可以访问两个 (2) 数据源的 spring boot。使用 HikariCp 连接到 Postgresql 和 Mongodb 的应用程序，但我收到 mongodb 错误。如果我将 mongodb 指向另一个数据库（如 Mysql 左右），它将可以工作，但不能用于 mongodb。

DataSourceOne

@Configuration
@EnableJpaRepositories(
        basePackages = "com.deanace.oauth2.repository.datasourceOne",
        entityManagerFactoryRef = "entityManagerFactoryBeanOne",
        transactionManagerRef = "transactionManagerOne"
)
public class DataSourceOne {

    @Value("${spring.datasource.one.driverClassName}")
    private String driver;

    @Value("${spring.datasource.one.url}")
    private String url;

    @Value("${spring.datasource.one.username}")
    private String username;

    @Value("${spring.datasource.one.password}")
    private String password;

    @Bean
    public DataSource DataSourceOne(){
        HikariConfig config = new HikariConfig();
        config.setDriverClassName(driver);
        config.setJdbcUrl(url);
        config.setUsername(username);
        config.setPassword(password);
        config.setAutoCommit(true);
        return new HikariDataSource(config);
    }

    @Bean
    public PlatformTransactionManager transactionManagerOne(){
        return new JpaTransactionManager(entityManagerFactoryBeanOne().getObject());
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBeanOne() {
        HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();

        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setJpaVendorAdapter(jpaVendorAdapter);
        entityManagerFactoryBean.setDataSource(DataSourceOne());
        entityManagerFactoryBean.setPackagesToScan("com.deanace.oauth2.entities");
        return entityManagerFactoryBean;
    }
}

数据源二

@Configuration
@EnableJpaRepositories(
        basePackages = "com.deanace.oauth2.repository.datasourceTwo",
        entityManagerFactoryRef = "entityManagerFactoryBeanTwo",
        transactionManagerRef = "transactionManagerTwo"
)
public class DataSourceTwo {

    @Value("${spring.datasource.mongodb.driverClassName}")
    private String driver;

    @Value("${spring.datasource.mongodb.url}")
    private String url;

    @Value("${spring.data.mongodb.username}")
    private String username;

    @Value("${spring.data.mongodb.password}")
    private String password;

    @Bean
    public DataSource DataSourceTwo(){
        HikariConfig config = new HikariConfig();
        config.setDriverClassName(driver);
        config.setJdbcUrl(url);
        config.setUsername(username);
        config.setPassword(password);
        config.setAutoCommit(true);
        return new HikariDataSource(config);
    }

    @Bean
    public PlatformTransactionManager transactionManagerTwo(){
        return new JpaTransactionManager(entityManagerFactoryBeanTwo().getObject());
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBeanTwo() {
        HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();

        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setJpaVendorAdapter(jpaVendorAdapter);
        entityManagerFactoryBean.setDataSource(DataSourceTwo());
        entityManagerFactoryBean.setPackagesToScan("com.deanace.oauth2.entities");
        return entityManagerFactoryBean;
    }
}

application.properties

    spring.application.name=spring-security-oauth2
    spring.datasource.type=com.zaxxer.hikari.HikariDataSource
    # suppress inspection "SpringBootApplicationProperties" for whole file
    server.port=8080
    # ===============================
    # DATASOURCE
    # ===============================
    # DataSource (Postgresql offline).
    spring.datasource.one.driverClassName=org.postgresql.Driver
    spring.datasource.one.url=jdbc:postgresql://localhost:5432/application1
    spring.datasource.one.username=postgres
    spring.datasource.one.password=password

    #mongodb mongodb.jdbc.MongoDriver
    spring.datasource.one.driverClassName=org.MongoDriver.Driver
    spring.datasource.one.url=jdbc:mongo://localhost:5432/application2
    spring.data.mongodb.username=mongodb
    spring.data.mongodb.password=password
    spring.data.mongodb.host=localhost
    spring.data.mongodb.port=27017
    spring.data.mongodb.database=application2

错误

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactoryBeanTwo' defined in class path resource [com/deanace/oauth2/persistence/DataSourceTwo.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactoryBeanTwo' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'DataSourceTwo' defined in class path resource [com/deanace/oauth2/persistence/DataSourceTwo.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'DataSourceTwo' threw exception; nested exception is java.lang.RuntimeException: Failed to load class of driverClassName mongodb.jdbc.MongoDriver
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1080) ~[spring-context-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:857) ~[spring-context-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.10.RELEASE.jar:1.5.10.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.10.RELEASE.jar:1.5.10.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.10.RELEASE.jar:1.5.10.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.10.RELEASE.jar:1.5.10.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.10.RELEASE.jar:1.5.10.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.10.RELEASE.jar:1.5.10.RELEASE]
    at com.deanace.oauth2.SpringSecurityOauth2Application.main(SpringSecurityOauth2Application.java:64) [classes/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactoryBeanTwo' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'DataSourceTwo' defined in class path resource [com/deanace/oauth2/persistence/DataSourceTwo.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'DataSourceTwo' threw exception; nested exception is java.lang.RuntimeException: Failed to load class of driverClassName mongodb.jdbc.MongoDriver
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    ... 18 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'DataSourceTwo' defined in class path resource [com/deanace/oauth2/persistence/DataSourceTwo.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'DataSourceTwo' threw exception; nested exception is java.lang.RuntimeException: Failed to load class of driverClassName mongodb.jdbc.MongoDriver
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.obtainBeanInstanceFromFactory(ConfigurationClassEnhancer.java:389) ~[spring-context-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at com.deanace.oauth2.persistence.DataSourceTwo$$EnhancerBySpringCGLIB$$cf32bb56.DataSourceTwo(<generated>) ~[classes/:na]
    at com.deanace.oauth2.persistence.DataSourceTwo.entityManagerFactoryBeanTwo(DataSourceTwo.java:62) ~[classes/:na]
    at com.deanace.oauth2.persistence.DataSourceTwo$$EnhancerBySpringCGLIB$$cf32bb56.CGLIB$entityManagerFactoryBeanTwo$1(<generated>) ~[classes/:na]
    at com.deanace.oauth2.persistence.DataSourceTwo$$EnhancerBySpringCGLIB$$cf32bb56$$FastClassBySpringCGLIB$$12340b71.invoke(<generated>) ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) ~[spring-context-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at com.deanace.oauth2.persistence.DataSourceTwo$$EnhancerBySpringCGLIB$$cf32bb56.entityManagerFactoryBeanTwo(<generated>) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_152]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_152]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_152]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_152]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    ... 19 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'DataSourceTwo' threw exception; nested exception is java.lang.RuntimeException: Failed to load class of driverClassName mongodb.jdbc.MongoDriver
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    ... 41 common frames omitted
Caused by: java.lang.RuntimeException: Failed to load class of driverClassName mongodb.jdbc.MongoDriver
    at com.zaxxer.hikari.HikariConfig.setDriverClassName(HikariConfig.java:323) ~[HikariCP-2.5.1.jar:na]
    at com.deanace.oauth2.persistence.DataSourceTwo.DataSourceTwo(DataSourceTwo.java:43) ~[classes/:na]
    at com.deanace.oauth2.persistence.DataSourceTwo$$EnhancerBySpringCGLIB$$cf32bb56.CGLIB$DataSourceTwo$0(<generated>) ~[classes/:na]
    at com.deanace.oauth2.persistence.DataSourceTwo$$EnhancerBySpringCGLIB$$cf32bb56$$FastClassBySpringCGLIB$$12340b71.invoke(<generated>) ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) ~[spring-context-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at com.deanace.oauth2.persistence.DataSourceTwo$$EnhancerBySpringCGLIB$$cf32bb56.DataSourceTwo(<generated>) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_152]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_152]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_152]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_152]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    ... 42 common frames omitted
Caused by: java.lang.ClassNotFoundException: mongodb.jdbc.MongoDriver
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_152]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_152]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) ~[na:1.8.0_152]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_152]
    at com.zaxxer.hikari.HikariConfig.setDriverClassName(HikariConfig.java:318) ~[HikariCP-2.5.1.jar:na]
    ... 53 common frames omitted

或者，如果有人可以通过另一种可能有所帮助的方法提供帮助。提前致谢

【问题讨论】：

你的 spring 和 mongodb 版本是什么？

标签： spring-boot spring-data spring-data-jpa hikaricp

【解决方案1】：

如果我理解正确，您正在尝试将 mongoDB 与 JDBC 一起使用。我认为这不是将 JDBC 与 mongoDB 一起使用的常见做法。但是，如果您想使用这种方式，可以使用 unityJDBC 作为 JDBC 驱动程序。也可以看看this。

【讨论】：

@want2learn..感谢您的回复。我已经厌倦了，但不适合我

【解决方案2】：

如果你想连接mongodb和JDBC，你可以在application.properties文件中添加这两行来连接mongodb和JDBC，并排除自动配置。

#connect mongodb with jdbc
spring.data.mongodb.uri=mongodb://localhost:27017/testDb\ 

#exclude jdbc autoconfiguration
spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

还将@EnableAutoConfiguration 注解放在应用程序的main.class

@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class, XADataSourceAutoConfiguration.class})

因为 Spring Boot 应用程序的 JPA 自动配置功能尝试使用 JPA 数据源建立数据库连接。 Java 类 DataSourceAutoConfiguration 负责加载 JPA 数据源。可以通过从 Spring Boot 上下文中排除 DataSourceAutoConfiguration 类来禁用自动配置。

【讨论】：