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<h3>构造器详细资料</h3>
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<h4>DaoException</h4>
<pre>public&nbsp;DaoException()</pre>
<div class="block">Constructs a new runtime exception with <code>null</code> as its
 detail message.  The cause is not initialized, and may subsequently be
 initialized by a call to <code>Throwable.initCause(java.lang.Throwable)</code>.</div>
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