Question

实体使用表ID生成器策略：

@Id
@TableGenerator(name = "id_gen",
        table = "id_gen",
        pkColumnName = "gen_name",
        valueColumnName = "gen_val",
        pkColumnValue = "shared_id_generator", /*same as generator name by default*/
        initialValue = 10, /*0 by default*/
        allocationSize = 100 /*50 by default*/)
@GeneratedValue(strategy = GenerationType.TABLE, generator = "id_gen")
private long id;

所有实体使用相同的策略和相同的生成器，因此我将表生成器defenition移动到jpa-mapping xml文件中。 maven项目中的位置：

main/resources/db/jpa/orm.xml

现在，生成器在jpa-mapping xml文件中定义为：

<table-generator name="id_shared_generator"
                 table="id_gen"
                 pk-column-name="gen_name"
                 pk-column-value="shared_id_value"
                 value-column-name="gen_val"
                 initial-value="10"
                 allocation-size="100" />

现在实体有以下id字段：

@Id
@GeneratedValue(strategy = GenerationType.TABLE, generator = "id_shared_generator")
private long id;

我根本不使用persistence.xml文件，而是配置entityManagerFactory：

    @Bean
    @DependsOn("liquibase")
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
        LocalContainerEntityManagerFactoryBean emfb = new LocalContainerEntityManagerFactoryBean();
        emfb.setDataSource(dataSource);
//        emfb.setPersistenceXmlLocation("classpath:META-INF/persistence.xml");
        emfb.setPackagesToScan(new String[]{"com.savdev.springmvcexample.domain"});
        emfb.setMappingResources("db/jpa/orm.xml");
        emfb.setJpaVendorAdapter(jpaVendorAdapter());
        emfb.setJpaProperties( new Properties(){{
            put("hibernate.hbm2ddl.auto", "validate");
            put("hibernate.format_sql", "true");
            put("hibernate.show_sql", "true");
        }});
        emfb.setPersistenceUnitName("springmvcexample");
        return emfb;
    }

现在，当我尝试加载spring应用程序上下文时，我收到以下异常：

引起：org.springframework.beans.factory.BeanCreationException：在类中定义名为'entityManagerFactory'的bean时出错 path resource [spring / repository-config.xml]：init的调用方法失败;嵌套异常是 javax.persistence.PersistenceException：[PersistenceUnit：default] 无法构建EntityManagerFactory ...由以下原因引起： org.hibernate.AnnotationException：未知Id.generator： id_shared_generator

请告诉我，我做错了什么？是否允许通过emfb.setMappingResources("db/jpa/orm.xml");调用设置其他jpa映射xml文件？

在Spring容器中为jpa查找xml中的id生成器

0 个答案: