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📄 jsp-set1-right-12.htm

📁 写给JSP初级程序员的书
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<title>csdn_JSP语法(12)——<jsp:useBean> </title>
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      <div align="center"><font>JSP语法(12)——&lt;jsp:useBean&gt; 
        <br>
        </font></div>
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      <p>&lt;jsp:useBean&gt; </p>
      <p>创建一个Bean实例并指定它的名字和作用范围. </p>
      <p><br>
        JSP 语法<br>
        &lt;jsp:useBean </p>
      <p>id=&quot;beanInstanceName&quot; </p>
      <p>scope=&quot;page | request | session | application&quot; </p>
      <p>{ </p>
      <p>class=&quot;package.class&quot; | </p>
      <p>type=&quot;package.class&quot; | </p>
      <p>class=&quot;package.class&quot; type=&quot;package.class&quot; | </p>
      <p>beanName=&quot;{package.class | &lt;%= expression %&gt;}&quot; type=&quot;package.class&quot; 
      </p>
      <p>} </p>
      <p> { </p>
      <p>/&gt; | </p>
      <p>&gt; other elements &lt;/jsp:useBean&gt; </p>
      <p>} </p>
      <p>例子</p>
      <p>&lt;jsp:useBean id=&quot;cart&quot; scope=&quot;session&quot; class=&quot;session.Carts&quot; 
        /&gt; </p>
      <p>&lt;jsp:setProperty name=&quot;cart&quot; property=&quot;*&quot; /&gt; 
      </p>
      <p>&lt;jsp:useBean id=&quot;checking&quot; scope=&quot;session&quot; class=&quot;bank.Checking&quot; 
        &gt; </p>
      <p>&lt;jsp:setProperty name=&quot;checking&quot; property=&quot;balance&quot; 
        value=&quot;0.0&quot; /&gt; </p>
      <p>&lt;/jsp:useBean&gt; </p>
      <p></p>
      <p></p>
      <p></p>
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