引起：java.lang.IllegalArgumentException：属性'driverClassName'不能为空

Posted 2023-04-12

【中文标题】引起：java.lang.IllegalArgumentException：属性\'driverClassName\'不能为空

【英文标题】：Caused by: java.lang.IllegalArgumentException: Property 'driverClassName' must not be empty引起：java.lang.IllegalArgumentException：属性'driverClassName'不能为空

【发布时间】：2020-06-09 09:02:15

【问题描述】：

在我在这里分享的代码Exception in thread "restartedMain" java.lang.reflect.InvocationTargetException Caused by: java.lang.NullPointerException 中出现新错误。你能帮我解决这个问题吗？

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'springLogging3Application': Unsatisfied dependency expressed through field 'factory'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'factory' defined in com.spring.main.SpringLogging3Application: Unsatisfied dependency expressed through method 'getSessionFactory' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'datasource' defined in com.spring.main.SpringLogging3Application: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Circular reference involving containing bean 'springLogging3Application' - consider declaring the factory method as static for independence from its containing instance. Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalArgumentException: Property 'driverClassName' must not be empty
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:598) ~[spring-beans-5.1.15.RELEASE.jar:5.1.15.RELEASE]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Circular reference involving containing bean 'springLogging3Application' - consider declaring the factory method as static for independence from its containing instance. Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalArgumentException: Property 'driverClassName' must not be empty
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.1.15.RELEASE.jar:5.1.15.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.15.RELEASE.jar:5.1.15.RELEASE]
    ... 51 common frames omitted
Caused by: java.lang.IllegalArgumentException: Property 'driverClassName' must not be empty
    at org.springframework.util.Assert.hasText(Assert.java:284) ~[spring-core-5.1.15.RELEASE.jar:5.1.15.RELEASE]

application.properties

server.port=6565

db.driver:oracle.jdbc.driver.OracleDriver
db.url:jdbc:oracle:thin:@localhost:1521:xe  
db.username:xxxx  
db.password:xxxx

hibarenate.dialect:org.hibernate.dialect.OracleDialect
hibarenate.show_sql:true  
hibarenate.hbm2ddl.auto:update
entitymanager.packagesToScan:com.spring.main

更新了一个：

server.port=6565

db.driver=oracle.jdbc.driver.OracleDriver
db.url=jdbc:oracle:thin:@localhost:1521:xe  
db.username=xxxx 
db.password=xxxx

hibarenate.dialect=org.hibernate.dialect.OracleDialect
hibarenate.show_sql=true  
hibarenate.hbm2ddl.auto=update
entitymanager.packagesToScan=com.spring.main

【问题讨论】：

你能分享文件 application.properties 或 application.yml 吗？

@Fatih 我已添加。

您使用的是弹簧型材吗？

@Fatih 不，我没有使用任何个人资料。

你的应用程序文件乱了，属性用等号分隔key=value对

【参考方案1】：

尝试以下方法：

不要在 application.properties 文件中混合使用“=”和“:”分隔符 记录“db.driver”属性，好像是空的

问候。

【讨论】：

请更新您尝试过的新应用程序。

@silentsudo 添加。更新了 application.properties

这不是我的问题的解决方案。请不要标记它。

【参考方案2】：

请分享并检查您的 xyz-servlet.xml 配置文件，您在其中定义了 spring spring boot 和 hibernate 信息。在看到您的错误后，我知道这是您的 xml 文件中的 hibernate 异常，请检查您是否已定义或不是 DriverClassName 详情见下面的例子

看看这个DB有四个属性driverClassName、url、username和password

<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource" name="dataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>**check this property whether you have define or not if not then define it corresponding DB driver name as i have defined my driver details**
<property name="url" value="jdbc:mysql://localhost:3306/hibernatedb"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</bean>

【讨论】：

我没有使用 XML 进行配置。我用注释做到了这一点，并将我的属性文件粘贴在上面。完整代码请查看***.com/questions/62238830/…