[英]Spring 4 and Hibernate 4/c3p0 with Entity Manager don't start
[英]can't create dataSource bin with Spring, Hibernate and c3p0
我无法使用Spring,Hibernate和MySql将dataSource bin创建为c3p0 connectionPool
我的错误:
java.lang.NoSuchMethodError: com.mchange.v2.c3p0.impl.C3P0Defaults.dataSourceName()Ljava/lang/String;
at com.mchange.v2.c3p0.impl.PoolBackedDataSourceBase.<init>(PoolBackedDataSourceBase.java:49)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.<init>(AbstractPoolBackedDataSource.java:74)
at com.mchange.v2.c3p0.ComboPooledDataSource.<init>(ComboPooledDataSource.java:134)
at com.mchange.v2.c3p0.ComboPooledDataSource.<init>(ComboPooledDataSource.java:130)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Cannot resolve reference to bean 'dataSource' while setting bean property 'dataSource'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.mchange.v2.c3p0.ComboPooledDataSource]: Constructor threw exception; nested exception is java.lang.NoSuchMethodError: com.mchange.v2.c3p0.impl.C3P0Defaults.dataSourceName()Ljava/lang/String;
我的春季配置:
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/screenshots" />
<property name="user" value="root" />
<property name="password" value="root" />
<property name="acquireIncrement" value="1"></property>
<property name="minPoolSize" value="5" />
<property name="maxPoolSize" value="10" />
<property name="maxIdleTime" value="1800" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" lazy-init="false" autowire="default">
<property name="dataSource">
<ref local="dataSource" />
</property>
<property name="packagesToScan" value="com.webscreenshots.bean"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.max_fetch_depth">3</prop>
<prop key="hibernate.jdbc.fetch_size">50</prop>
<prop key="hibernate.jdbc.batch_size">10</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
<tx:annotation-driven />
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
和我的POM依赖项:
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.28</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.2.1</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>4.3.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.3.0.Final</version>
</dependency>
我正在使用Spring 3.2。
这是典型配置,我不介意出了什么问题。 你能给我一些建议吗?
您很有可能在应用程序的CLASSPATH中的某个位置埋了一个旧版本的c3p0,这种方式与ClassLoader委托相结合,导致在有效代码库中混合使用c3p0版本。 在0.9.2-pre6左右的某个位置( 早于您认为使用的版本c3p0 0.9.2.1)添加了其调用触发NoSuchMethod错误的方法。 可能是您带来了0.9.1.x版本以及托管依赖项(请注意,c3p0-0.9.2.x之前的版本与最新版本具有不同的组名),否则您将拥有非托管的jar文件在某个地方。
上面列出的依赖项看起来很好,hibernate-c3p0-4.3.0.Final取决于您显式添加的c3p0版本。 但是您可能想尝试不将c3p0显式添加为依赖项,而只是让hibernate-c3p0引入其版本。 请注意,从4.2.3版开始,您要的c3p0版本已成为休眠依赖关系; 如果您以某种方式引入了早于该版本的依赖项,则可能会遇到问题。 一种或另一种方式是,您需要了解应用程序的有效CLASSPATH(包括JVM扩展目录),并找出旧版本与您要使用的版本共存的地方。
我的问题是您的com.mchange.v2.c3p0.ComboPooledDataSource
类的acquireIncrement
属性应该是
<property name="acquireIncrement">1</property>
要么
<property name="acquireIncrement" value="1"/>
尝试更改此设置并再次运行您的应用程序
希望这能解决您的问题!
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