我有一个双向映射，如下所示
@Entity
@Table(name = "Stock")
public class StockEntity implements Serializable {
private String planNum;
private Set<StockOptionEntity> options = new HashSet<StockOptionEntity>(0);
@OneToMany(fetch = FetchType.EAGER, mappedBy="stock")
public Set<StockOptionEntity> getOptions() {
return Options;
}
public void setOptions(Set<StockOptionEntity> Options) {
this.Options = Options;
}
}
然后我有另一个映射如下..
@Entity
@Table(name = "StockOption")
@IdClass(StockOptionEntityPK.class)
public class StockOptionEntity implements Serializable {
private StockEntity stock;
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "PlanNum", insertable = false, updatable = false)
public StockEntity getStock() {
return Stock;
}
public void setStock(StockEntity Stock) {
this.Stock = Stock;
}
}
然后我将Spring Beans声明为Session，Entity＆amp;交易经理
@Bean
public DataSource msSqlDataSource() {
SQLServerConnectionPoolDataSource dataSource = new SQLServerConnectionPoolDataSource();
...........
return dataSource;
}
@Bean
@DependsOn({ "msSqlDataSource"})
public LocalSessionFactoryBean sessionFactory() {
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
try {
sessionFactory.setDataSource(msSqlDataSource());
} catch (Exception e) {
log.error("Failed to attach dataSource object to SessionFactory bean. "
+ "Exception: " + e.getMessage());
}
sessionFactory
.setPackagesToScan("com.firstx.db.entity.*");
sessionFactory.setHibernateProperties(hibernateProperties());
return sessionFactory;
}
@Bean
@DependsOn({ "sessionFactory","msSqlDataSource"})
public EntityManagerFactory entityManagerFactory() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setGenerateDdl(true);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("com.firstx.db.entity.*");
try {
factory.setDataSource(msSqlDataSource());
} catch (Exception e) {
log.error("Failed to attach dataSource object to EntityManagerFactor bean. "
+ "Exception: " + e.getMessage());
}
factory.afterPropertiesSet();
return factory.getObject();
}
@Bean
public PlatformTransactionManager transactionManager(){
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(
entityManagerFactory() );
return transactionManager;
}
最后，我使用Spring Data repository - repository.findOne（...）方法将Stock对象与StockOptions一起提取。
在这种情况下，我无法检索股票期权的集合。该系列是空的。
我尝试了以下方法（保持Spring bean不变），
以上两个选项都无效。
在调试中，我看到StockOptions被成功检索并加载到会话缓存中。但是，我无法弄清楚为什么它实际上没有被加载回父对象。
以下是调试......
1853270 [http-nio-8080-exec-10] TRACE o.h.e.i.DefaultInitializeCollectionEventListener - Initializing collection [com.firstx.db.entity.base.StockEntity.options#d97]
1853270 [http-nio-8080-exec-10] TRACE o.h.e.i.DefaultInitializeCollectionEventListener - Checking second-level cache
1853270 [http-nio-8080-exec-10] TRACE o.h.e.i.DefaultInitializeCollectionEventListener - Collection not cached
1853271 [http-nio-8080-exec-10] DEBUG o.h.l.c.p.AbstractLoadPlanBasedCollectionInitializer - Loading collection: [com.firstx.db.entity.base.StockEntity.options#d97]
1853271 [http-nio-8080-exec-10] DEBUG org.hibernate.SQL - select options0_.PlanNum as PlanNum1_11_0_, options0_.PlanNum as PlanNum1_13_0_, options0_.OptionCode as Optio2_13_0_, options0_.PlanNum as PlanNum1_13_1_ ......... from StockOption options0_ where options0_.PlanNum=?
1853271 [http-nio-8080-exec-10] TRACE o.h.e.j.i.JdbcCoordinatorImpl - Registering statement [SQLServerPreparedStatement:13]
1853271 [http-nio-8080-exec-10] TRACE o.h.e.j.i.JdbcCoordinatorImpl - Registering last query statement [SQLServerPreparedStatement:13]
1853271 [http-nio-8080-exec-10] TRACE o.h.type.descriptor.sql.BasicBinder - binding parameter [1] as [VARCHAR] - [d97]
1853271 [http-nio-8080-exec-10] TRACE o.h.l.p.e.i.AbstractLoadPlanBasedLoader - Bound [2] parameters total
1853305 [http-nio-8080-exec-10] TRACE o.h.e.j.i.JdbcCoordinatorImpl - Registering result set [SQLServerResultSet:68]
1854044 [http-nio-8080-exec-10] DEBUG o.h.l.p.e.p.i.ResultSetProcessorImpl - Preparing collection intializer : [com.firstx.db.entity.base.StockEntity.options#d97]
1854044 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Constructing collection load context for result set [SQLServerResultSet:68]
1854773 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Starting attempt to find loading collection [[com.firstx.db.entity.base.StockEntity.options#d97]]
1854773 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Attempting to locate loading collection entry [CollectionKey[com.firstx.db.entity.base.StockEntity.options#d97]] in any result-set context
1854774 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Collection [CollectionKey[com.firstx.db.entity.base.StockEntity.options#d97]] not located in load context
1854774 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Collection not yet initialized; initializing
1854774 [http-nio-8080-exec-10] TRACE o.h.l.p.e.p.i.ResultSetProcessorImpl - Processing result set
1854774 [http-nio-8080-exec-10] DEBUG o.h.l.p.e.p.i.ResultSetProcessorImpl - Starting ResultSet row #0
1854774 [http-nio-8080-exec-10] TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([PlanNum1_13_1_] : [VARCHAR]) - [D97]
1854774 [http-nio-8080-exec-10] TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([Optio2_13_1_] : [VARCHAR]) - [03]
1854775 [http-nio-8080-exec-10] TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([PlanNum1_11_0_] : [VARCHAR]) - [D97]
1854775 [http-nio-8080-exec-10] DEBUG o.h.l.p.e.p.i.CollectionReferenceInitializerImpl - Found row of collection: [com.firstx.db.entity.base.StockEntity.options#D97]
1855453 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Starting attempt to find loading collection [[com.firstx.db.entity.base.StockEntity.options#D97]]
1855454 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Attempting to locate loading collection entry [CollectionKey[com.firstx.db.entity.base.StockEntity.options#D97]] in any result-set context
1855454 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Collection [CollectionKey[com.firstx.db.entity.base.StockEntity.options#D97]] not located in load context
1855454 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Collection already initialized; ignoring
1856195 [http-nio-8080-exec-10] DEBUG o.h.l.p.e.p.i.ResultSetProcessorImpl - Starting ResultSet row #1
1856196 [http-nio-8080-exec-10] TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([PlanNum1_13_1_] : [VARCHAR]) - [D97]
1856196 [http-nio-8080-exec-10] TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([Optio2_13_1_] : [VARCHAR]) - [18]
1856196 [http-nio-8080-exec-10] TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([PlanNum1_11_0_] : [VARCHAR]) - [D97]
1856196 [http-nio-8080-exec-10] DEBUG o.h.l.p.e.p.i.CollectionReferenceInitializerImpl - Found row of collection: [com.firstx.db.entity.base.StockEntity.options#D97]
1856819 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Starting attempt to find loading collection [[com.firstx.db.entity.base.StockEntity.options#D97]]
1856820 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Attempting to locate loading collection entry [CollectionKey[com.firstx.db.entity.base.StockEntity.options#D97]] in any result-set context
1856820 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Collection [CollectionKey[com.firstx.db.entity.base.StockEntity.options#D97]] not located in load context
1856820 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Collection already initialized; ignoring
1857454 [http-nio-8080-exec-10] DEBUG o.h.l.p.e.p.i.ResultSetProcessorImpl - Starting ResultSet row #2
1857454 [http-nio-8080-exec-10] TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([PlanNum1_13_1_] : [VARCHAR]) - [D97]
1857454 [http-nio-8080-exec-10] TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([Optio2_13_1_] : [VARCHAR]) - [42]
1857455 [http-nio-8080-exec-10] TRACE o.h.t.descriptor.sql.BasicExtractor - extracted value ([PlanNum1_11_0_] : [VARCHAR]) - [D97]
1857455 [http-nio-8080-exec-10] DEBUG o.h.l.p.e.p.i.CollectionReferenceInitializerImpl - Found row of collection: [com.firstx.db.entity.base.StockEntity.options#D97]
1858028 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Starting attempt to find loading collection [[com.firstx.db.entity.base.StockEntity.options#D97]]
1858028 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Attempting to locate loading collection entry [CollectionKey[com.firstx.db.entity.base.StockEntity.options#D97]] in any result-set context
1858028 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Collection [CollectionKey[com.firstx.db.entity.base.StockEntity.options#D97]] not located in load context
1858028 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Collection already initialized; ignoring
1858628 [http-nio-8080-exec-10] TRACE o.h.l.p.e.p.i.ResultSetProcessorImpl - Done processing result set (3 rows)
1858628 [http-nio-8080-exec-10] TRACE o.h.l.p.e.p.i.AbstractRowReader - Total objects hydrated: 0
1859193 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Attempting to locate loading collection entry [CollectionKey[com.firstx.db.entity.base.StockEntity.options#d97]] in any result-set context
1859193 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts - Collection [CollectionKey[com.firstx.db.entity.base.StockEntity.options#d97]] located in load context
1861703 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Removing collection load entry [org.hibernate.engine.loading.internal.LoadingCollectionEntry<rs=SQLServerResultSet:68, coll=[com.firstx.db.entity.base.StockEntity.options#d97]>@8edfd0]
1863159 [http-nio-8080-exec-10] DEBUG o.h.e.l.i.CollectionLoadContext - 1 collections were found in result set for role: com.firstx.db.entity.base.StockEntity.options
1863159 [http-nio-8080-exec-10] TRACE o.h.e.l.i.CollectionLoadContext - Ending loading collection [org.hibernate.engine.loading.internal.LoadingCollectionEntry<rs=SQLServerResultSet:68, coll=[com.firstx.db.entity.base.StockEntity.options#d97]>@8edfd0]
1864512 [http-nio-8080-exec-10] DEBUG o.h.e.l.i.CollectionLoadContext - Collection fully initialized: [com.firstx.db.entity.base.StockEntity.options#d97]
1865190 [http-nio-8080-exec-10] DEBUG o.h.e.l.i.CollectionLoadContext - 1 collections initialized for role: com.firstx.db.entity.base.StockEntity.options
1865190 [http-nio-8080-exec-10] TRACE o.h.e.j.i.JdbcCoordinatorImpl - Releasing result set [SQLServerResultSet:68]
1865190 [http-nio-8080-exec-10] TRACE o.h.e.j.i.JdbcCoordinatorImpl - Closing result set [SQLServerResultSet:68]
1865190 [http-nio-8080-exec-10] TRACE o.h.e.j.i.JdbcCoordinatorImpl - Releasing statement [SQLServerPreparedStatement:13]
1865190 [http-nio-8080-exec-10] TRACE o.h.e.j.i.JdbcCoordinatorImpl - Closing prepared statement [SQLServerPreparedStatement:13]
1865211 [http-nio-8080-exec-10] TRACE o.h.e.j.i.JdbcCoordinatorImpl - Starting after statement execution processing [ON_CLOSE]
1865979 [http-nio-8080-exec-10] DEBUG o.h.l.c.p.AbstractLoadPlanBasedCollectionInitializer - Done loading collection
1865979 [http-nio-8080-exec-10] TRACE o.h.e.i.DefaultInitializeCollectionEventListener - Collection initialized
1866720 [http-nio-8080-exec-10] DEBUG o.h.l.e.p.AbstractLoadPlanBasedEntityLoader - Done entity load : com.firstx.db.entity.base.StockEntity#d97
1866720 [http-nio-8080-exec-10] TRACE org.hibernate.internal.SessionImpl - Setting cache mode to: NORMAL
1866720 [http-nio-8080-exec-10] DEBUG o.h.e.t.spi.AbstractTransactionImpl - committing
1866720 [http-nio-8080-exec-10] TRACE org.hibernate.internal.SessionImpl - before transaction completion
1866740 [http-nio-8080-exec-10] DEBUG o.h.e.t.i.jdbc.JdbcTransaction - committed JDBC Connection
1866740 [http-nio-8080-exec-10] DEBUG o.h.e.t.i.jdbc.JdbcTransaction - re-enabling autocommit
1866763 [http-nio-8080-exec-10] TRACE o.h.e.t.i.TransactionCoordinatorImpl - after transaction completion
1866763 [http-nio-8080-exec-10] TRACE org.hibernate.internal.SessionImpl - after transaction completion
1866763 [http-nio-8080-exec-10] TRACE org.hibernate.internal.SessionImpl - Setting flush mode to: AUTO
1866763 [http-nio-8080-exec-10] TRACE org.hibernate.internal.SessionImpl - Closing session
1866764 [http-nio-8080-exec-10] TRACE o.h.e.j.i.JdbcCoordinatorImpl - Closing JDBC container [org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl@6dc5a3df]
1866764 [http-nio-8080-exec-10] TRACE o.h.e.j.i.LogicalConnectionImpl - Closing logical connection
1866764 [http-nio-8080-exec-10] DEBUG o.h.e.j.i.LogicalConnectionImpl - Releasing JDBC connection
1866764 [http-nio-8080-exec-10] DEBUG o.h.e.j.i.LogicalConnectionImpl - Released JDBC connection
另外，我没有启用任何缓存选项。
如上所示，正在提取stockoption集合，但未插入stock对象。
更新
我原始帖子中的大写股票和期权是一个查找和替换错误..抱歉...
我写了一个绕过spring数据的简单类，结果就是它工作了！实体加载没有任何问题。
我认为我对Spring数据配置做错了（可能）。但不确定。
下面是使用相同映射的简单（常规hibernate DAO样式）：
@Repository
public class NewStock {
@Autowired
private SessionFactory sessionFactory;
public SessionFactory getSessionFactory() {
return sessionFactory;
}
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public StockEntity retrieveStock(String planNum) {
Session session = sessionFactory.openSession();
session.beginTransaction();
List<StockEntity> stockList = session
.createQuery("from StockEntity where planNum = '" +
planNum+ "'")
.list();
session.close();
return stockList.get(0);
}
}
请帮助找出根本原因。
答案 0 :(得分：0)
请尝试更改
private StockEntity Stock;
到
private StockEntity stock;
答案 1 :(得分：0)
声明字段和相应的getter和setter方法时，必须遵循Java bean naming conventions。
在StockEntity.java课程中，属性Options应为options，应以小写字母开头。
同样适用于您的其他实体 - StockOptionEntity.java类属性Stock应为stock。
现在出现问题，根据日志，它有以下消息：
1854774 [http-nio-8080-exec-10] TRACE o.h.e.loading.internal.LoadContexts -
Collection [CollectionKey[com.firstx.db.entity.base.StockEntity.options#d97]] not
located in load context
此消息表示hibernate无法在options类中找到名为StockEntity的属性。因此，即使hibernate获得StockOptionEntity的记录，因为它没有找到属性，它只是忽略了它。
要解决此问题，请遵循Java bean命名约定。