struts-logic.tld

ActionServlet源码 struts的一个步骤都有 知道本来有视频的太大了 就没有上传了

            </description>
        </attribute>
        <attribute>
            <name>property</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>Name of the property for which messages should be
         retrieved.  If not specified, all messages (regardless
         of property) are retrieved.
      </p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>message</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>By default the tag will retrieve the bean it will
         iterate over from the <code>Globals.ERROR_KEY</code> constant string,
         but if this attribute is set to 'true' the bean
         will be retrieved from the <code>Globals.MESSAGE_KEY</code>
         constant string.  Also if this is set to 'true', any value
         assigned to the name attribute will be ignored.
      </p>
      ]]>
            </description>
        </attribute>
    </tag>
    <tag>
        <name>messagesPresent</name>
        <tag-class>
            org.apache.struts.taglib.logic.MessagesPresentTag</tag-class>
        <body-content>JSP</body-content>
        <description>
            <![CDATA[
            <p><strong>
    Generate the nested body content of this tag if the specified
    message is present in any scope.
    </strong></p>
          
    <p>Evaluates the nested body content of this tag if
       an <code>ActionMessages</code>
       object, <code>ActionErrors</code> object, a String,
       or a String array is present in any scope.  If
       such a bean is not found, nothing will be rendered.
    </p>
    
            <dl><dt><b>Since:</b></dt>
            <dd>Struts 1.1</dd></dl>
          ]]>
        </description>
        <attribute>
            <name>name</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The parameter key used to retrieve the message from page, request, 
      session, or application scope.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>property</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>Name of the property for which messages should be
         retrieved.  If not specified, all messages (regardless
         of property) are retrieved.
      </p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>message</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>By default the tag will retrieve the bean it will
         iterate over from the <code>Globals.ERROR_KEY</code> constant string,
         but if this attribute is set to 'true' the bean
         will be retrieved from the <code>Globals.MESSAGE_KEY</code>
         constant string.  Also if this is set to 'true', any value
         assigned to the name attribute will be ignored.
      </p>
      ]]>
            </description>
        </attribute>
    </tag>
    <tag>
        <name>notEmpty</name>
        <tag-class>org.apache.struts.taglib.logic.NotEmptyTag</tag-class>
        <body-content>JSP</body-content>
        <description>
            <![CDATA[
            <p><strong>
    Evaluate the nested body content of this tag if the requested variable is
    neither null, nor an empty string, nor an empty java.util.Collection
    (tested by the .isEmpty() method on the java.util.Collection interface).
    </strong></p>
          
    <p>This tag evaluates its nested body content only if the specified value
    is present (i.e. not <code>null</code>) and is not an empty string (i.e. a
    <code>java.lang.String</code> with a length of zero).</p>
    
    <p>
    <strong>JSTL</strong>:  The equivalent JSTL tag is &lt;c:if&gt; using the 
    <code>! empty</code> operator.  For example,
    <br/>
    <code>
    	&lt;c:if test="${ ! empty sessionScope.myBean.myProperty}"&gt;
    	  do something
    	&lt;/c:if&gt;
    </code>
    </p>
    ]]>
        </description>
        <attribute>
            <name>name</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be compared is the JSP bean specified by this
      attribute, if <code>property</code> is not specified, or the value
      of the specified property of this bean, if <code>property</code>
      is specified.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>property</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be compared is the property (of the bean specified
      by the <code>name</code> attribute) specified by this attribute.
      The property reference can be simple, nested, and/or indexed.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>scope</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The bean scope within which to search for the bean named by the
      <code>name</code> property, or "any scope" if not specified.</p>
      ]]>
            </description>
        </attribute>
    </tag>
    <tag>
        <name>notEqual</name>
        <tag-class>org.apache.struts.taglib.logic.NotEqualTag</tag-class>
        <body-content>JSP</body-content>
        <description>
            <![CDATA[
            <p><strong>
    Evaluate the nested body content of this tag if the requested
    variable is not equal to the specified value.
    </strong></p>
          
    <p>Compares the variable specified by one of the selector attributes
    against the specified constant value.  The nested body content of this
    tag is evaluated if the variable and value are <strong>not equal</strong>.
    </p>
    ]]>
        </description>
        <attribute>
            <name>cookie</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be compared is the value of the cookie whose
      name is specified by this attribute.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>header</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be compared is the value of the header whose
      name is specified by this attribute.  The name match is performed
      in a case insensitive manner.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>name</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be compared is the JSP bean specified by this
      attribute, if <code>property</code> is not specified, or the value
      of the specified property of this bean, if <code>property</code>
      is specified.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>parameter</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be compared is the first, or only, value of the
      request parameter specified by this attribute.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>property</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be compared is the property (of the bean specified
      by the <code>name</code> attribute) specified by this attribute.
      The property reference can be simple, nested, and/or indexed.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>scope</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The bean scope within which to search for the bean named by the
      <code>name</code> property, or "any scope" if not specified.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>value</name>
            <required>true</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The constant value to which the variable, specified by other
      attribute(s) of this tag, will be compared.</p>
      ]]>
            </description>
        </attribute>
    </tag>
    <tag>
        <name>notMatch</name>
        <tag-class>org.apache.struts.taglib.logic.NotMatchTag</tag-class>
        <body-content>JSP</body-content>
        <description>
            <![CDATA[
            <p><strong>
    Evaluate the nested body content of this tag if the specified value
    is not an appropriate substring of the requested variable.
    </strong></p>
          
    <p>Matches the variable specified by one of the selector attributes
    (as a String) against the specified constant value.  If the value is
    not a substring (appropriately limited by the <code>location</code>
    attribute), the nested body content of this tag is evaluated.</p>
    ]]>
        </description>
        <attribute>
            <name>cookie</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be matched is the value of the cookie whose
      name is specified by this attribute.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>header</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be matched is the value of the header whose
      name is specified by this attribute.  The name match is performed
      in a case insensitive manner.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>location</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>If not specified, a match between the variable and the value may
      occur at any position within the variable string.  If specified, the
      match must occur at the specified location (either <code>start</code>
      or <code>end</code>) of the variable string.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>name</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be matched is the JSP bean specified by this
      attribute, if <code>property</code> is not specified, or the value
      of the specified property of this bean, if <code>property</code>
      is specified.</p>
      ]]>
            </description>
        </attribute>
        <attribute>
            <name>parameter</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
            <description>
                <![CDATA[
      <p>The variable to be matched is the first, or only, value of the
      request parameter specified by this attribute.</p>
      ]]>