解Hibernate +һ

ʱ䣺 2013-04-20 19:43:01 ߣ rapoo

解Hibernate +1

?span style="">?/span>??+1

?/span>夳?/span>Hibernate黤{etch="select"etch="join",g载??

?/span>?/span>
1对E(one-to-many) 11sql?对象??迸对象Q以nsql1sql? 1 +n??/span>

2E对<many-to-one>??sqln对象?n对象对1 对象?亥?sql? +n??/span>

3terator ??举Q?sql?ID没中D?? 产1+nSQL?/span>

?/span>解?/span>

1azy=true?hibernate3?已认lazy=truelazy=true询象覹象Kd孵Q?/span>

2 亨?1+N Q为使?询Q中以祾~中徿?1+N ?/span>

3 ) 以֮etch="join"塨失载??/span>

>ܹ

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