嘗試應用AttributeConverter時出錯

我在使用JPA AttributeConverter與彈簧引導1.2.1 RELEASE，它工作正常。但我得到以下錯誤升級到春季啓動1.3.0.RELEASE嘗試應用AttributeConverter時出錯

Caused by: javax.persistence.PersistenceException: Error attempting to apply AttributeConverter 
    at org.hibernate.type.descriptor.converter.AttributeConverterSqlTypeDescriptorAdapter$1.bind(AttributeConverterSqlTypeDescriptorAdapter.java:103) 
    at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:286) 
    at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:281) 
    at org.hibernate.type.AbstractSingleColumnStandardBasicType.nullSafeSet(AbstractSingleColumnStandardBasicType.java:56) 
    at org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2843) 
    at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3248) 
    at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:3183) 
    at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3525) 
    at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:159) 
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:465) 
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:351) 
    at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:350) 
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:56) 
    at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1258) 
    at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:425) 
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101) 
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:177) 
    at org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:77) 
    at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:517) 
    ... 81 more 
Caused by: java.lang.NullPointerException 
    at rafito.spring.boot.domain.TimestampPersistenceConverter.convertToDatabaseColumn(TimestampPersistenceConverter.java:16) 
    at rafito.spring.boot.domain.TimestampPersistenceConverter.convertToDatabaseColumn(TimestampPersistenceConverter.java:10) 
    at org.hibernate.type.descriptor.converter.AttributeConverterSqlTypeDescriptorAdapter$1.bind(AttributeConverterSqlTypeDescriptorAdapter.java:97)

我不會在我的崗位設置JSON和serviceBeginTime目前serviceEndTime後。但是在升級彈簧啓動版本之前，這並沒有給我一個空指針。

Converter類

實體

@Column(name = "service_begin_time") 
@Convert(converter = TimestampPersistenceConverter.class) 
Long serviceBeginTime; 

@Column(name = "service_end_time") 
@Convert(converter = TimestampPersistenceConverter.class) 
Long serviceEndTime;

數據庫領域

service_begin_time timestamp without time zone, 
service_end_time timestamp without time zone,

來源

2015-12-09 Appy

爲什麼你不看異常的堆棧跟蹤，也許有一個嵌套的異常。最好還是把它發佈在問題中，然後人們得到信息 –

，所以你的轉換器中有一個NPE ......所以也許你的轉換器需要修復以適應零值。 –

是的。那是我的解決方法'@Override public timestamp convertToDatabaseColumn（Long aLong）{ if（aLong == null） return null; 返回新的時間戳（aLong）; }' – Appy

添加空校驗因爲這是最簡單的。

@Override 
    public Timestamp convertToDatabaseColumn(Long aLong) { 
     if (aLong == null) 
      return null; 
     return new Timestamp(aLong); 
    }

來源

2015-12-09 16:03:18 Appy

嘗試應用AttributeConverter時出錯

回答

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