Java 不带persistence.xml的多entityManagerFactory
我在一个使用SpringMVC4的项目中工作,JPA配置bean是在java类中创建的,没有persistence.xml,如下代码所示Java 不带persistence.xml的多entityManagerFactory,java,spring,entitymanager,persistence.xml,Java,Spring,Entitymanager,Persistence.xml,我在一个使用SpringMVC4的项目中工作,JPA配置bean是在java类中创建的,没有persistence.xml,如下代码所示 package test.conf; import java.util.Properties; import javax.persistence.EntityManagerFactory; import org.springframework.context.annotation.Bean; import org.springframework.contex
package test.conf;
import java.util.Properties;
import javax.persistence.EntityManagerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableTransactionManagement
public class JPAConfiguration {
@Bean
@Primary
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
factoryBean.setJpaVendorAdapter(vendorAdapter);
factoryBean.setDataSource(dataSource());
Properties props = new Properties();
props.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
props.setProperty("hibernate.show_sql", "false");
props.setProperty("hibernate.hbm2ddl.auto", "update");
factoryBean.setJpaProperties(props);
String [] packages = {"test.model"};
factoryBean.setPackagesToScan(packages);
return factoryBean;
}
@Bean
@Primary
public DriverManagerDataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setUsername("root");
dataSource.setPassword("root");
dataSource.setUrl("jdbc:mysql://localhost:3306/database");
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
return dataSource;
}
@Bean
@Primary
public JpaTransactionManager transactionManager(EntityManagerFactory emf){
return new JpaTransactionManager(emf);
}
}
这工作正常,但现在,我们必须连接到第二个ORACLE数据库,并且需要第二个entity manager工厂。我该怎么做?我找到了在persistence.xml上创建第二个持久性单元的示例,但我在该项目中没有persistence.xml。其他人教如何使用SpringBoot创建到多个数据源的连接,但这不是SpringBoot项目
我尝试为另一个数据库创建第二个JPA配置类,然后指定factoryBean.setPersistenceUnitName;对于每个entitymanagerfactorybean,但Spring似乎都搞糟了,因为它总是两次初始化一个单元。您需要在属性中有第二个数据源详细信息
#second db ...
spring.secondDatasource.url = [url]
spring.secondDatasource.username = [username]
spring.secondDatasource.password = [password]
spring.secondDatasource.driverClassName = oracle.jdbc.OracleDriver
然后创建您的配置类,该类将具有使用第二个数据源的所有配置,并使用第二个数据源启用jpa Repository
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(entityManagerFactoryRef = "secondEntityManagerFactory",
transactionManagerRef = "secondTransactionManager",
basePackages = {"com.server.second.repo"}
)
public class SecondDBConfiguration
@Bean("secondDatasource")
@ConfigurationProperties(prefix="spring.secondDatasource")
public DataSource secondaryDataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "secondEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean
secondEntityManagerFactory(
EntityManagerFactoryBuilder builder,
@Qualifier("secondDatasource") DataSource dataSource
) {
return
builder
.dataSource(dataSource)
.packages("com.server.shadow.domain")
.persistenceUnit("shadow")
.build();
}
@Bean(name = "secondTransactionManager")
public PlatformTransactionManager secondTransactionManager(
@Qualifier("secondEntityManagerFactory") EntityManagerFactory
secondEntityManagerFactory
) {
return new JpaTransactionManager(secondEntityManagerFactory);
}
Tks。我的配置文件中缺少一些参数,这导致了错误