Lob (Java EE 5 SDK)

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Java EE 5 SDK

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摘要: REQUIRED | OPTIONAL

详细信息: ELEMENT

javax.persistence Annotation Type Lob

@Target(value={METHOD,FIELD}) @Retention(value=RUNTIME) public @interface Lob

Specifies that a persistent property or field should be persisted as a large object to a database-supported large object type. The Lob annotation may be used in conjunction with the Basic annotation. A Lob may be either a binary or character type.

The Lob type is inferred from the type of the persistent field or property, and except for string and character-based types defaults to Blob.


   Example:

   @Lob @Basic(fetch=LAZY)
   @Column(name="REPORT")
   protected String report;

从以下版本开始:: Java Persistence 1.0

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