java - 无法加载驱动程序类 org.mariadb.jdbc.Driver

Question

我想在 Spring Boot 中配置 2 个 JNDI 数据源。我试过这个配置:

application.properties

spring.production-datasource.jndi-name=java:/global/production_gateway
spring.production-datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDBDialect
spring.jpa.show-sql = true
spring.jpa.hibernate.ddl-auto = update

spring.warehouse-datasource.jndi-name=java:/global/production_warehouse
spring.warehouse-datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDBDialect
spring.jpa.show-sql = true
spring.jpa.hibernate.ddl-auto = update

主数据源配置:

    @Configuration
@EnableJpaRepositories(
        basePackages = "org.datalis.plugin.production.entity", 
        entityManagerFactoryRef = "productionEntityManager", 
        transactionManagerRef = "productionTransactionManager"
    )
@EnableTransactionManagement
public class ContextProductionDatasource {

    @Autowired
    private Environment env;

    @Primary
    @Bean(name = "productionDataSourceProperties")
    @ConfigurationProperties(prefix="spring.production.datasource")
    public DataSourceProperties productionDataSourceProperties() {
        return new DataSourceProperties();
    }   

    @Primary
    @Bean(name = "productionDataSource")
    @ConfigurationProperties(prefix="spring.production.datasource")
    public DataSource productionDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Primary
    @Bean(name = "productionEntityManager") 
    public EntityManager productionEntityManager(EntityManagerFactory emf) {
        return emf.createEntityManager();
    }

    @Primary
    @Bean(name = "productionTransactionManager")    
    public PlatformTransactionManager productionTransactionManager(final EntityManagerFactory emf) {
        final JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(emf);
        return transactionManager;
    }

    @Primary
    @Bean(name = "productionExceptionTranslation")
    public PersistenceExceptionTranslationPostProcessor productionExceptionTranslation() {
        return new PersistenceExceptionTranslationPostProcessor();
    }
}

第二个数据源配置:

    @Configuration
@EnableJpaRepositories(
        basePackages = "org.datalis.plugin.warehouse.entity", 
        entityManagerFactoryRef = "warehouseEntityManager", 
        transactionManagerRef = "warehouseTransactionManager"
    )
@EnableTransactionManagement
public class ContextWarehouseDatasource {

    @Autowired
    private Environment env;

    @Bean(name = "warehouseDataSourceProperties")
    @ConfigurationProperties(prefix="spring.warehouse.datasource")
    public DataSourceProperties warehouseDataSourceProperties() {
        return new DataSourceProperties();
    }

    @Bean(name = "warehouseDataSource")
    @ConfigurationProperties(prefix="spring.warehouse.datasource")
    public DataSource warehouseDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "warehouseEntityManager")  
    public EntityManager warehouseEntityManager(EntityManagerFactory emf) {
        return emf.createEntityManager();
    }

    @Bean(name = "warehouseTransactionManager")
    public PlatformTransactionManager warehouseTransactionManager(final EntityManagerFactory emf) {
        final JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(emf);
        return transactionManager;
    }

    @Bean(name = "warehouseExceptionTranslation")
    public PersistenceExceptionTranslationPostProcessor warehouseExceptionTranslation() {
        return new PersistenceExceptionTranslationPostProcessor();
    }
}

但是在部署过程中出现错误:

    Caused by: java.lang.IllegalStateException: Unable to set value for property driver-class-name
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.JavaBeanBinder$BeanProperty.setValue(JavaBeanBinder.java:349)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.JavaBeanBinder.bind(JavaBeanBinder.java:96)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.JavaBeanBinder.bind(JavaBeanBinder.java:79)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.JavaBeanBinder.bind(JavaBeanBinder.java:56)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.Binder.lambda$bindDataObject$5(Binder.java:452)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.Binder$Context.withIncreasedDepth(Binder.java:570)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.Binder$Context.withDataObject(Binder.java:556)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.Binder$Context.access$400(Binder.java:513)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.Binder.bindDataObject(Binder.java:450)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.Binder.bindObject(Binder.java:391)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.Binder.bind(Binder.java:320)
        ... 132 more
Caused by: java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at deployment.datalis_rest_api.war//org.springframework.boot.context.properties.bind.JavaBeanBinder$BeanProperty.setValue(JavaBeanBinder.java:346)
        ... 142 more
Caused by: java.lang.RuntimeException: Failed to load driver class org.mariadb.jdbc.Driver in either of HikariConfig class loader or Thread context classloader
        at deployment.datalis_rest_api.war//com.zaxxer.hikari.HikariConfig.setDriverClassName(HikariConfig.java:485)

我正在使用部署到 Wildfly 服务器的 Spring boot war，并部署了 mariadb-java-client-2.4.2.jar。当我使用单个数据源配置时它工作正常。但是对于第二个数据源，我得到了异常(exception)。

你知道我该如何解决这个问题吗？

第二次尝试 :

应用程序属性:

spring.production.datasource.jndi-name=java:/global/production_gateway
spring.production.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.production.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDBDialect
spring.production.jpa.show-sql = true
spring.production.jpa.hibernate.ddl-auto = update

spring.warehouse.datasource.jndi-name=java:/global/production_warehouse
spring.warehouse.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.warehouse.jpa.properties.hibernate.dialect=org.hibernate.dialect.MariaDBDialect
spring.warehouse.jpa.show-sql = true
spring.warehouse.jpa.hibernate.ddl-auto = update

第一个数据源:

@Configuration
@EnableJpaRepositories(
        basePackages = "org.datalis.plugin.production.entity", 
        entityManagerFactoryRef = "productionEntityManager", 
        transactionManagerRef = "productionTransactionManager"
    )
@EnableTransactionManagement
public class ContextProductionDatasource {

    @Primary
    @Bean(name = "productionDataSourceProperties")
    @ConfigurationProperties(prefix="spring.production")
    public DataSourceProperties productionDataSourceProperties() {
        return new DataSourceProperties();
    }   

    @Primary
    @Bean(name = "productionDataSource")
    @ConfigurationProperties(prefix="spring.production")
    public DataSource productionDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Primary
    @Bean(name = "productionEntityManager") 
    public EntityManager productionEntityManager(EntityManagerFactory emf) {
        return emf.createEntityManager();
    }

    @Primary
    @Bean(name = "productionTransactionManager")    
    public PlatformTransactionManager productionTransactionManager(final EntityManagerFactory emf) {
        final JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(emf);
        return transactionManager;
    }

    @Primary
    @Bean(name = "productionExceptionTranslation")
    public PersistenceExceptionTranslationPostProcessor productionExceptionTranslation() {
        return new PersistenceExceptionTranslationPostProcessor();
    }
}

第二个数据源:

@Configuration
@EnableJpaRepositories(
        basePackages = "org.datalis.plugin.warehouse.entity", 
        entityManagerFactoryRef = "warehouseEntityManager", 
        transactionManagerRef = "warehouseTransactionManager"
    )
@EnableTransactionManagement
public class ContextWarehouseDatasource {

    @Bean(name = "warehouseDataSourceProperties")
    @ConfigurationProperties(prefix="spring.warehouse")
    public DataSourceProperties warehouseDataSourceProperties() {
        return new DataSourceProperties();
    }

    @Bean(name = "warehouseDataSource")
    @ConfigurationProperties(prefix="spring.warehouse")
    public DataSource warehouseDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "warehouseEntityManager")  
    public EntityManager warehouseEntityManager(EntityManagerFactory emf) {
        return emf.createEntityManager();
    }

    @Bean(name = "warehouseTransactionManager")
    public PlatformTransactionManager warehouseTransactionManager(final EntityManagerFactory emf) {
        final JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(emf);
        return transactionManager;
    }

    @Bean(name = "warehouseExceptionTranslation")
    public PersistenceExceptionTranslationPostProcessor warehouseExceptionTranslation() {
        return new PersistenceExceptionTranslationPostProcessor();
    }
}

现在我得到:

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required.
        at deployment.datalis_rest_api.war//org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
        at deployment.datalis_rest_api.war//org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:640)
        ... 41 more
Caused by: java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required.

Answer 1

更正两个 entityManager bean 的名称:productionEntityManager 和仓库实体管理器
entityManagerFactoryRef在 @EnableJpaRepositories是 beanName 引用，

所以用

@Configuration
@EnableJpaRepositories(
        basePackages = "org.datalis.plugin.production.entity", 
        entityManagerFactoryRef = "productionEntityManager",  
        transactionManagerRef = "productionTransactionManager" 
    )
@EnableTransactionManagement
public class ContextProductionDatasource {

  ...

 @Primary
    @Bean   
    public EntityManager productionEntityManager(EntityManagerFactory emf) {
        return emf.createEntityManager();
    }

和

@Configuration
@EnableJpaRepositories(
        basePackages = "org.datalis.plugin.warehouse.entity", 
        entityManagerFactoryRef = "warehouseEntityManager", 
        transactionManagerRef = "warehouseTransactionManager"
    )
@EnableTransactionManagement
public class ContextWarehouseDatasource {

   ...

    @Bean   
    public EntityManager warehouseEntityManager(EntityManagerFactory emf) {
        return emf.createEntityManager();
    }

您需要匹配 @ConfigurationProperties 中的属性名称到属性值 ' - ' 与 ' . '

使用 @ConfigurationProperties(prefix="spring.production-datasource")和 @ConfigurationProperties(prefix="spring.warehouse-datasource")
并确保您的类路径中有驱动程序

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<dependency>
    <groupId>org.mariadb.jdbc</groupId>
    <artifactId>mariadb-java-client</artifactId>
    <version>2.5.2</version>
    <scope>runtime</scope>
</dependency>