JoinTable (Java EE 5 SDK)

javax.persistence Annotation Type JoinTable

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

This annotation is used in the mapping of associations. It is specified on the owning side of a many-to-many association, or in a unidirectional one-to-many association.

If the JoinTable annotation is missing, the default values of the annotation elements apply. The name of the join table is assumed to be the table names of the associated primary tables concatenated together (owning side first) using an underscore.

    Example:
    @JoinTable(
    name="CUST_PHONE",
    joinColumns=
        @JoinColumn(name="CUST_ID", referencedColumnName="ID"),
    inverseJoinColumns=
        @JoinColumn(name="PHONE_ID", referencedColumnName="ID")
    )
 

从以下版本开始:

Java Persistence 1.0

name

public abstract String name

(Optional) The name of the join table.

Defaults to the concatenated names of the two associated primary entity tables, separated by an underscore.

默认值:

""

catalog

public abstract String catalog

(Optional) The catalog of the table.

Defaults to the default catalog.

默认值:

""

schema

public abstract String schema

(Optional) The schema of the table.

Defaults to the default schema for user.

默认值:

""

joinColumns

public abstract JoinColumn[] joinColumns

(Optional) The foreign key columns of the join table which reference the primary table of the entity owning the association (i.e. the owning side of the association).

Uses the same defaults as for JoinColumn.

默认值:

{}

inverseJoinColumns

public abstract JoinColumn[] inverseJoinColumns

(Optional) The foreign key columns of the join table which reference the primary table of the entity that does not own the association (i.e. the inverse side of the association).

Uses the same defaults as for JoinColumn.

默认值:

{}

uniqueConstraints

public abstract UniqueConstraint[] uniqueConstraints

(Optional) Unique constraints that are to be placed on the table. These are only used if table generation is in effect.

Defaults to no additional constraints.

默认值:

{}

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