我是相对较新的春天,并希望用mysql实现spring jpa。下面提到的是我的配置......
<beans ...
<context:component-scan base-package="com.pg" />
<mvc:annotation-driven />
<tx:annotation-driven/>
<aop:aspectj-autoproxy />
<jpa:repositories base-package="com.pg.dao" /> ...
我在下面列出了用于创建数据源,transactionmanager和entitymanager的配置类。
package com.pg.conf;
import java.util.Properties;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import javax.transaction.TransactionManager;
import org.apache.tomcat.dbcp.dbcp.BasicDataSource;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
@Configuration
public class JPAConfiguration {
@Bean
public DataSource dataSource(){
BasicDataSource datasource = new BasicDataSource();
datasource.setDriverClassName(com.mysql.jdbc.Driver.class.getName());
datasource.setUrl("jdbc:mydql://localhost:3306/pg1");
datasource.setUsername("root");
datasource.setPassword("root");
return datasource;
}
@Bean
public **FactoryBean<EntityManagerFactory>** entityManagerFactory(){
LocalContainerEntityManagerFactoryBean containerEntityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
containerEntityManagerFactoryBean.setDataSource(dataSource());
HibernateJpaVendorAdapter adaptor = new HibernateJpaVendorAdapter();
containerEntityManagerFactoryBean.setJpaVendorAdapter(adaptor);
containerEntityManagerFactoryBean.setPackagesToScan("com.pg.entity");
Properties props = new Properties();
props.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
props.setProperty("hibernate.show_sql", "true");
containerEntityManagerFactoryBean.setJpaProperties(props);
return containerEntityManagerFactoryBean;
}
@Bean
public TransactionManager transactionManager(){
JpaTransactionManager jpaTransactionManager = new JpaTransactionManager();
jpaTransactionManager.setDataSource(dataSource());
**jpaTransactionManager.setEntityManagerFactory(entityManagerFactory());**
return transactionManager();
}
}
我的行 jpaTransactionManager.setEntityManagerFactory(entityManagerFactory());
我认为entitymanager方法的返回类型不正确...即使它没有显示错误....
感谢任何帮助。
答案 0 :(得分:4)
首先阅读Spring参考指南并阅读FactoryBean
s。
然后相应地更改您的代码。
@Bean
public TransactionManager transactionManager(EntityManagerFactory entityManagerFactory){
JpaTransactionManager jpaTransactionManager = new JpaTransactionManager();
jpaTransactionManager.setDataSource(dataSource());
jpaTransactionManager.setEntityManagerFactory(entityManagerFactory);
return jpaTransactionManager;
}
答案 1 :(得分:0)
替换
jpaTransactionManager.setEntityManagerFactory(entityManagerFactory());
使用
jpaTransactionManager.setEntityManagerFactory((EntityManagerFactory) entityManagerFactory());