associations.html

是一个中文的Hibernate库文档

</class>

<class name="Address">
    <id name="id" column="addressId">
        <generator class="native"/>
    </id>
&lt;/class&gt;</pre><pre class="programlisting">
create table Person ( personId bigint not null primary key )
create table PersonAddress ( personId bigint not null, addressId bigint not null, primary key (personId, addressId) )
create table Address ( addressId bigint not null primary key )
        </pre></div></div><div class="sect1" lang="zh-cn"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="assoc-bidirectional"></a>8.4.&nbsp;&#21452;&#21521;&#20851;&#32852;&#65288;Bidirectional associations&#65289;</h2></div></div><div></div></div><div class="sect2" lang="zh-cn"><div class="titlepage"><div><div><h3 class="title"><a name="assoc-bidirectional-m21"></a>8.4.1.&nbsp;&#19968;&#23545;&#22810;&#65288;one to many) / &#22810;&#23545;&#19968;&#65288;many to one&#65289;</h3></div></div><div></div></div><p>
            <span class="emphasis"><em>&#21452;&#21521;&#22810;&#23545;&#19968;&#20851;&#32852;</em></span> &#26159;&#26368;&#24120;&#35265;&#30340;&#20851;&#32852;&#20851;&#31995;&#12290;&#65288;&#36825;&#20063;&#26159;&#26631;&#20934;&#30340;&#29238;/&#23376;&#20851;&#32852;&#20851;&#31995;&#12290;&#65289;
        </p><pre class="programlisting">&lt;class name="Person"&gt;
    &lt;id name="id" column="personId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;many-to-one name="address" 
        column="addressId"
        not-null="true"/&gt;
&lt;/class&gt;

&lt;class name="Address"&gt;
    &lt;id name="id" column="addressId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;set name="people" inverse="true"&gt;
        &lt;key column="addressId"/&gt;
        &lt;one-to-many class="Person"/&gt;
    &lt;/set&gt;
&lt;/class&gt;</pre><pre class="programlisting">
create table Person ( personId bigint not null primary key, addressId bigint not null )
create table Address ( addressId bigint not null primary key )
        </pre></div><div class="sect2" lang="zh-cn"><div class="titlepage"><div><div><h3 class="title"><a name="assoc-bidirectional-121"></a>8.4.2.&nbsp;&#19968;&#23545;&#19968;&#65288;one to one&#65289;</h3></div></div><div></div></div><p>
           <span class="emphasis"><em>&#22522;&#20110;&#22806;&#38190;&#20851;&#32852;&#30340;&#21452;&#21521;&#19968;&#23545;&#19968;&#20851;&#32852;</em></span>&#20063;&#24456;&#24120;&#35265;&#12290;
        </p><pre class="programlisting">&lt;class name="Person"&gt;
    &lt;id name="id" column="personId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;many-to-one name="address" 
        column="addressId" 
        unique="true"
        not-null="true"/&gt;
&lt;/class&gt;

&lt;class name="Address"&gt;
    &lt;id name="id" column="addressId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
   &lt;one-to-one name="person" 
        property-ref="address"/&gt;
&lt;/class&gt;</pre><pre class="programlisting">
create table Person ( personId bigint not null primary key, addressId bigint not null unique )
create table Address ( addressId bigint not null primary key )
        </pre><p>
            <span class="emphasis"><em>&#22522;&#20110;&#20027;&#38190;&#20851;&#32852;&#30340;&#19968;&#23545;&#19968;&#20851;&#32852;</em></span>&#38656;&#35201;&#20351;&#29992;&#29305;&#23450;&#30340;id&#29983;&#25104;&#22120;&#12290;
        </p><pre class="programlisting">&lt;class name="Person"&gt;
    &lt;id name="id" column="personId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;one-to-one name="address"/&gt;
&lt;/class&gt;

&lt;class name="Address"&gt;
    &lt;id name="id" column="personId"&gt;
        &lt;generator class="foreign"&gt;
            &lt;param name="property"&gt;person&lt;/param&gt;
        &lt;/generator&gt;
    &lt;/id&gt;
    &lt;one-to-one name="person" 
        constrained="true"/&gt;
&lt;/class&gt;</pre><pre class="programlisting">
create table Person ( personId bigint not null primary key )
create table Address ( personId bigint not null primary key )
        </pre></div></div><div class="sect1" lang="zh-cn"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="assoc-bidirectional-join"></a>8.5.&nbsp;&#20351;&#29992;&#36830;&#25509;&#34920;&#30340;&#21452;&#21521;&#20851;&#32852;&#65288;Bidirectional associations with join tables&#65289;</h2></div></div><div></div></div><div class="sect2" lang="zh-cn"><div class="titlepage"><div><div><h3 class="title"><a name="assoc-bidirectional-join-12m"></a>8.5.1.&nbsp;&#19968;&#23545;&#22810;&#65288;one to many&#65289; /&#22810;&#23545;&#19968;&#65288; many to one&#65289;</h3></div></div><div></div></div><p>
             <span class="emphasis"><em>&#22522;&#20110;&#36830;&#25509;&#34920;&#30340;&#21452;&#21521;&#19968;&#23545;&#22810;&#20851;&#32852;</em></span>&#12290;&#27880;&#24847;<tt class="literal">inverse="true"</tt>&#21487;&#20197;&#20986;&#29616;&#22312;&#20851;&#32852;&#30340;&#20219;&#24847;&#19968;&#31471;&#65292;&#21363;collection&#31471;&#25110;&#32773;join&#31471;&#12290;
        </p><pre class="programlisting">&lt;class name="Person"&gt;
    &lt;id name="id" column="personId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;set name="addresses" 
        table="PersonAddress"&gt;
        &lt;key column="personId"/&gt;
        &lt;many-to-many column="addressId"
            unique="true"
            class="Address"/&gt;
    &lt;/set&gt;
&lt;/class&gt;

&lt;class name="Address"&gt;
    &lt;id name="id" column="addressId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;join table="PersonAddress" 
        inverse="true" 
        optional="true"&gt;
        &lt;key column="addressId"/&gt;
        &lt;many-to-one name="person"
            column="personId"
            not-null="true"/&gt;
    &lt;/join&gt;
&lt;/class&gt;</pre><pre class="programlisting">
create table Person ( personId bigint not null primary key )
create table PersonAddress ( personId bigint not null, addressId bigint not null primary key )
create table Address ( addressId bigint not null primary key )
        </pre></div><div class="sect2" lang="zh-cn"><div class="titlepage"><div><div><h3 class="title"><a name="assoc-bidirectional-join-121"></a>8.5.2.&nbsp;&#19968;&#23545;&#19968;&#65288;one to one&#65289;</h3></div></div><div></div></div><p>
            <span class="emphasis"><em>&#22522;&#20110;&#36830;&#25509;&#34920;&#30340;&#21452;&#21521;&#19968;&#23545;&#19968;&#20851;&#32852;</em></span>&#26497;&#20026;&#32597;&#35265;&#65292;&#20294;&#20063;&#26159;&#21487;&#34892;&#30340;&#12290;
        </p><pre class="programlisting">&lt;class name="Person"&gt;
    &lt;id name="id" column="personId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;join table="PersonAddress" 
        optional="true"&gt;
        &lt;key column="personId" 
            unique="true"/&gt;
        &lt;many-to-one name="address"
            column="addressId" 
            not-null="true"
            unique="true"/&gt;
    &lt;/join&gt;
&lt;/class&gt;

&lt;class name="Address"&gt;
    &lt;id name="id" column="addressId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;join table="PersonAddress" 
        optional="true"
        inverse="true"&gt;
        &lt;key column="addressId" 
            unique="true"/&gt;
        &lt;many-to-one name="address"
            column="personId" 
            not-null="true"
            unique="true"/&gt;
    &lt;/join&gt;
&lt;/class&gt;</pre><pre class="programlisting">
create table Person ( personId bigint not null primary key )
create table PersonAddress ( personId bigint not null primary key, addressId bigint not null unique )
create table Address ( addressId bigint not null primary key )
        </pre></div><div class="sect2" lang="zh-cn"><div class="titlepage"><div><div><h3 class="title"><a name="assoc-bidirectional-join-m2m"></a>8.5.3.&nbsp;&#22810;&#23545;&#22810;&#65288;many to many&#65289;</h3></div></div><div></div></div><p>
            &#26368;&#21518;&#65292;&#36824;&#26377; <span class="emphasis"><em>&#21452;&#21521;&#22810;&#23545;&#22810;&#20851;&#32852;</em></span>.
        </p><pre class="programlisting">&lt;class name="Person"&gt;
    &lt;id name="id" column="personId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;set name="addresses"&gt;
        &lt;key column="personId"/&gt;
        &lt;many-to-many column="addressId"
            class="Address"/&gt;
    &lt;/set&gt;
&lt;/class&gt;

&lt;class name="Address"&gt;
    &lt;id name="id" column="addressId"&gt;
        &lt;generator class="native"/&gt;
    &lt;/id&gt;
    &lt;set name="people" inverse="true"&gt;
        &lt;key column="addressId"/&gt;
        &lt;many-to-many column="personId"
            class="Person"/&gt;
    &lt;/set&gt;
&lt;/class&gt;</pre><pre class="programlisting">
create table Person ( personId bigint not null primary key )
create table PersonAddress ( personId bigint not null, addressId bigint not null, primary key (personId, addressId) )
create table Address ( addressId bigint not null primary key )
        </pre></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="collections.html">&#19978;&#19968;&#39029;</a>&nbsp;</td><td width="20%" align="center"><a accesskey="u" href="index.html">&#19978;&#19968;&#32423;</a></td><td width="40%" align="right">&nbsp;<a accesskey="n" href="components.html">&#19979;&#19968;&#39029;</a></td></tr><tr><td width="40%" align="left" valign="top">&#31532;&nbsp;7&nbsp;&#31456;&nbsp;&#38598;&#21512;&#31867;(Collections)&#26144;&#23556;&nbsp;</td><td width="20%" align="center"><a accesskey="h" href="index.html">&#36215;&#22987;&#39029;</a></td><td width="40%" align="right" valign="top">&nbsp;&#31532;&nbsp;9&nbsp;&#31456;&nbsp;&#32452;&#20214;&#65288;Component&#65289;&#26144;&#23556;</td></tr></table></div></body></html>