Spring 如何在测试中重新配置LocalContainerEntityManagerFactoryBean

如果我有一个编程管理的LocalContainerEntityManagerFactoryBean，比如@Bean注释方法：

@Configuration
@EnableJpaRepositories(
  entityManagerFactoryRef = "myEntityManager",
  transactionManagerRef = "myTransactionManager",
  basePackages = {"com.mycompany.my.repository"}
)
public class MyDbConfig {

    @Bean
    public LocalContainerEntityManagerFactoryBean mcEntityManager() {
      LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
      //some production config here
      return em;
    }
}

我如何添加这个仅用于集成测试的小JPA属性，最好是通过下面的监听器（在测试类路径中）来添加

public类之后beanscreatedListener{
@自动连线
私有LocalContainerEntityManagerFactoryBean em
@施工后
私有void重新配置（）{
HashMap属性=em.getJpaPropertyMap（）
properties.put（“hibernate.hbm2ddl.auto”、“create”）；
em.setJpaPropertyMap（属性）；
}
}

---

目前，我正在使用另一个@Bean注释方法在嵌套的@TestConfiguration中生成LocalContainerEntityManagerFactoryBean，但这意味着我需要复制该Bean的所有其他创建逻辑，这当然是纯粹的邪恶。

快速而简单的解决方案是在mcEntityManager（）中创建属性映射这样的方法

@Configuration
@EnableJpaRepositories(
entityManagerFactoryRef = "myEntityManager",
transactionManagerRef = "myTransactionManager",
basePackages = {"com.mycompany.my.repository"}
)
public class MyDbConfig {

    @Bean
    public LocalContainerEntityManagerFactoryBean mcEntityManager() {
    LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
    
    HashMap<String, Object> properties = em.getJpaPropertyMap()
    properties.put("hibernate.hbm2ddl.auto", "create");
    em.setJpaPropertyMap(properties);

    return em;
    }
}

---

快速而简单的解决方案是在mcEntityManager（）方法中创建属性映射，如下所示

@Configuration
@EnableJpaRepositories(
entityManagerFactoryRef = "myEntityManager",
transactionManagerRef = "myTransactionManager",
basePackages = {"com.mycompany.my.repository"}
)
public class MyDbConfig {

    @Bean
    public LocalContainerEntityManagerFactoryBean mcEntityManager() {
    LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
    
    HashMap<String, Object> properties = em.getJpaPropertyMap()
    properties.put("hibernate.hbm2ddl.auto", "create");
    em.setJpaPropertyMap(properties);

    return em;
    }
}

---

您可能需要注入jpaPropertyMap。否则，您将在编译时得到方法签名冲突，您可能需要注入jpaPropertyMap。否则，您将在编译时得到方法签名冲突

@Bean
@Profile("dev)
public Map<String,Object> getMyJpaPropertyMap() {
    HashMap<String, Object> properties = new HashMap<>();
    properties.put("hibernate.hbm2ddl.auto", "create");
    properties.put("hibernate.temp.use_jdbc_metadata_defaults",false);
    properties.put("hibernate.jdbc.lob.non_contextual_creation",true);
}

@Bean
@Profile("prod)
public Map<String,Object> getMyJpaPropertyMap() {
    HashMap<String, Object> properties = new HashMap<>();
    properties.put("hibernate.hbm2ddl.auto", "update");
    properties.put("hibernate.temp.use_jdbc_metadata_defaults",true);
}

@Bean
public LocalContainerEntityManagerFactoryBean mcEntityManager() {
    LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
    em.setJpaPropertyMap(getMyJpaPropertyMap());
    return em;
}