Question

我是Spring＆amp;的新手Spring启动，我正在尝试访问两个数据源，但我只能连接到一个数据源。

当我尝试调用访问第二个数据源的函数时，调用转到第一个数据源，我得到以下错误，

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException：Table 'testify.test'不存在

我已经按照以下教程进行多数据库访问，我的代码类似于 Roufid 链接中的代码，

Roufid
Baeldung

有人可以指出我错过了什么或我在做错了吗 ？

下面是代码文件，

AConfig.java

@Configuration
@EnableJpaRepositories(entityManagerFactoryRef = "aEntityManager",
transactionManagerRef = "aTransactionManager",
basePackages = "test.serv")
public class AConfig {

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

@Primary
@Bean(name="aEntityManager")
public LocalContainerEntityManagerFactoryBean mysqlEntManFactory(EntityManagerFactoryBuilder build) {
    return build.dataSource(aDataSource()).persistenceUnit("aPU").build();
}

@Primary
@Bean(name="aTransactionManager")
public PlatformTransactionManager mysqlTransactionManager(@Qualifier("aEntityManager") EntityManagerFactory enManFact) {
    return new JpaTransactionManager(enManFact);
}
}

BConfig.java

@Configuration
@EnableJpaRepositories(entityManagerFactoryRef = "bEntityManager",
transactionManagerRef = "bTransactionManager",
basePackages = "test.serv")
public class BConfig {

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

@Bean(name="bEntityManager")
public LocalContainerEntityManagerFactoryBean mysqlEntManFactory(EntityManagerFactoryBuilder build) {
    return build.dataSource(bDataSource()).persistenceUnit("bPU").build();
}

@Bean(name="bTransactionManager")
public PlatformTransactionManager mysqlTransactionManager(@Qualifier("bEntityManager") EntityManagerFactory enManFact) {
    return new JpaTransactionManager(enManFact);
}
}

的persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/persistence     http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
     version="2.0">
<persistence-unit name="aPU"  transaction-type="RESOURCE_LOCAL">
</persistence-unit>
<persistence-unit name="bPU" transaction-type="RESOURCE_LOCAL">
</persistence-unit>
</persistence>

Service.java

public interface Service extends CrudRepository<X, Integer> {
@Query(value = "select y from test where x = :x", nativeQuery = true)
List<Object[]> findByName(@Param("x") String x);
}

Answer 1

问题是你的存储库类（Service）在同一个包中

@EnableJpaRepositories(entityManagerFactoryRef = "bEntityManager",
transactionManagerRef = "bTransactionManager",
basePackages = "test.serv")

basePackages =“test.serv”

将其移至seprate包中。这应该工作

无法在Spring启动中访问多个数据源

1 个答案: