--

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  1. JPA, ݟ .

  2. ݟ > . JPA ( ) ޟ.

  3. ݟ JPA.

    ؞
    . ޟ ޟ @ManyToOne.
    ޟ . null

    , ޟ ޟ ޟ ؟ .

    כ . " " .
    • ֟

    " ؞" .
    • ؞

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    ޛ ݟ ޟ null.

  4. ݟ JPA.

    ؞
    . ݟ ޟ @JoinColum.

    ؞ , ֟ .

    ؞, ޟ .

Eclipse ݟ:

@JoinTable(joinColumns=@JoinColumn(name="<JOIN_COLUMN>"), 
    name = "<JOIN_TABLE_NAME>")
@ManyToOne(targetEntity=<TARGET_ENTITY>, fetch=<FETCH_TYPE>, 
    cascade=<CASCADE_TYPE>)

 



 



" JPA"
JPA ( )

 



OR
EJB 3.0 Java Persistence API