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javadoc/javax/persistence/GeneratedValue.html
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javadoc/javax/persistence/GeneratedValue.html
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<title>GeneratedValue (RedKale的API文档)</title>
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<li>概要: </li>
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<li>字段 | </li>
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<li>必需 | </li>
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<li><a href="#annotation.type.optional.element.summary">可选</a></li>
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<ul class="subNavList">
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<li>详细资料: </li>
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<div class="subTitle">javax.persistence</div>
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<h2 title="注释类型 GeneratedValue" class="title">注释类型 GeneratedValue</h2>
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<br>
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<pre>@Target(value={METHOD,FIELD})
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@Retention(value=RUNTIME)
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public @interface <span class="memberNameLabel">GeneratedValue</span></pre>
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<div class="block">Provides for the specification of generation strategies for the
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values of primary keys.
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<p> The <code>GeneratedValue</code> annotation
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may be applied to a primary key property or field of an entity or
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mapped superclass in conjunction with the <a href="../../javax/persistence/Id.html" title="javax.persistence中的注释"><code>Id</code></a> annotation.
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The use of the <code>GeneratedValue</code> annotation is only
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required to be supported for simple primary keys. Use of the
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<code>GeneratedValue</code> annotation is not supported for derived
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primary keys.
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<pre>
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Example 1:
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@Id
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@GeneratedValue(strategy=SEQUENCE, generator="CUST_SEQ")
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@Column(name="CUST_ID")
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public Long getId() { return id; }
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Example 2:
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@Id
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@GeneratedValue(strategy=TABLE, generator="CUST_GEN")
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@Column(name="CUST_ID")
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Long id;
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</pre></div>
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<dl>
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<dt><span class="simpleTagLabel">从以下版本开始:</span></dt>
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<dd>Java Persistence 1.0</dd>
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<dt><span class="seeLabel">另请参阅:</span></dt>
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<dd><a href="../../javax/persistence/Id.html" title="javax.persistence中的注释"><code>Id</code></a></dd>
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</dl>
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<!-- =========== ANNOTATION TYPE OPTIONAL MEMBER SUMMARY =========== -->
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<li class="blockList"><a name="annotation.type.optional.element.summary">
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<!-- -->
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</a>
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<h3>可选元素概要</h3>
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<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="可选元素概要表, 列表可选元素和解释">
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<caption><span>可选元素</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colFirst" scope="col">限定符和类型</th>
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<th class="colLast" scope="col">可选元素和说明</th>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>java.lang.String</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/GeneratedValue.html#generator--">generator</a></span></code>
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<div class="block"><span class="deprecatedLabel">已过时。</span> </div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code><a href="../../javax/persistence/GenerationType.html" title="javax.persistence中的枚举">GenerationType</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/GeneratedValue.html#strategy--">strategy</a></span></code>
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<div class="block"><span class="deprecatedLabel">已过时。</span> </div>
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</td>
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</tr>
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</table>
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</li>
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</ul>
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</div>
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<div class="details">
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<ul class="blockList">
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<li class="blockList">
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<!-- ============ ANNOTATION TYPE MEMBER DETAIL =========== -->
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<ul class="blockList">
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<li class="blockList"><a name="annotation.type.element.detail">
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<!-- -->
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</a>
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<h3>元素详细资料</h3>
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<a name="strategy--">
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<!-- -->
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</a>
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<ul class="blockList">
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<li class="blockList">
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<h4>strategy</h4>
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<pre>@Deprecated
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public abstract <a href="../../javax/persistence/GenerationType.html" title="javax.persistence中的枚举">GenerationType</a> strategy</pre>
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<div class="block"><span class="deprecatedLabel">已过时。</span> </div>
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<div class="block">(Optional) The primary key generation strategy
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that the persistence provider must use to
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generate the annotated entity primary key.</div>
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<dl>
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<dt><span class="returnLabel">返回:</span></dt>
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<dd>GenerationType</dd>
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</dl>
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<dl>
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<dt>默认值:</dt>
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<dd>javax.persistence.GenerationType.AUTO</dd>
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</dl>
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</li>
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</ul>
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</li>
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</ul>
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<ul class="blockList">
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<li class="blockList"><a name="generator--">
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<!-- -->
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</a>
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<ul class="blockListLast">
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<li class="blockList">
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<h4>generator</h4>
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<pre>@Deprecated
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public abstract java.lang.String generator</pre>
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<div class="block"><span class="deprecatedLabel">已过时。</span> </div>
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<div class="block">(Optional) The name of the primary key generator
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to use as specified in the SequenceGenerator
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or TableGenerator annotation.
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<p> Defaults to the id generator supplied by persistence provider.</div>
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<dl>
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<dt><span class="returnLabel">返回:</span></dt>
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<dd>String</dd>
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</dl>
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<dl>
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<dt>默认值:</dt>
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<dd>""</dd>
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</dl>
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</li>
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</ul>
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</li>
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</ul>
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</li>
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</ul>
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</div>
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<li><a href="class-use/GeneratedValue.html">使用</a></li>
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<li><a href="../../javax/persistence/Entity.html" title="javax.persistence中的注释"><span class="typeNameLink">上一个类</span></a></li>
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<li>概要: </li>
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<li>字段 | </li>
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<li>必需 | </li>
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<li><a href="#annotation.type.optional.element.summary">可选</a></li>
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</ul>
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<ul class="subNavList">
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<li>详细资料: </li>
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<li>字段 | </li>
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<li><a href="#annotation.type.element.detail">元素</a></li>
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