写了一个struts2-number-plugin插件

为了格式化钱编辑框的格式，如保留后二位。Struts2没有提供相应的标签。struts1支持property的format属性。

于是自己写了一个关于数据格式化的插件。

在struts2包里的META-INF/struts-tags.tld

新增如下内容：

xml 代码

 <tag>
    <name>number</name>
    <tag-class>org.apache.struts2.views.jsp.ui.NumberTag</tag-class>
    <body-content>JSP</body-content>
    <description><![CDATA[Render an HTML input field of type number]]></description>
    <attribute>
      <name>accesskey</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html accesskey attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>cssClass</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[The css class to use for element]]></description>
    </attribute>
    <attribute>
      <name>cssStyle</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[The css style definitions for element ro use]]></description>
    </attribute>
    <attribute>
      <name>disabled</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html disabled attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>displayFormat</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[A pattern used for the visual display of the formatted number, e.g. ##.0#]]></description>
    </attribute>
    <attribute>
      <name>id</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[id for referencing element. For UI and form tags it will be used as HTML id attribute]]></description>
    </attribute>
    <attribute>
      <name>key</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the key (name, value, label) for this particular component]]></description>
    </attribute>
    <attribute>
      <name>label</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Label expression used for rendering a element specific label]]></description>
    </attribute>
    <attribute>
      <name>labelposition</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Define label position of form element (top/left)]]></description>
    </attribute>
    <attribute>
      <name>maxLength</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Deprecated. Use maxlength instead.]]></description>
    </attribute>
    <attribute>
      <name>maxlength</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[HTML maxlength attribute]]></description>
    </attribute>
    <attribute>
      <name>name</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[The name to set for element]]></description>
    </attribute>
    <attribute>
      <name>onblur</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[ Set the html onblur attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onchange</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onchange attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onclick</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onclick attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>ondblclick</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html ondblclick attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onfocus</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onfocus attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onkeydown</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onkeydown attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onkeypress</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onkeypress attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onkeyup</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onkeyup attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onmousedown</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onmousedown attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onmousemove</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onmousemove attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onmouseout</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onmouseout attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onmouseover</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onmouseover attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onmouseup</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onmouseup attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>onselect</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html onselect attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>readonly</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Whether the input is readonly]]></description>
    </attribute>
    <attribute>
      <name>required</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[If set to true, the rendered element will indicate that input is required]]></description>
    </attribute>
    <attribute>
      <name>requiredposition</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Define required position of required form element (left|right)]]></description>
    </attribute>
    <attribute>
      <name>size</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[HTML size attribute]]></description>
    </attribute>
    <attribute>
      <name>tabindex</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html tabindex attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>template</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[The template (other than default) to use for rendering the element]]></description>
    </attribute>
    <attribute>
      <name>templateDir</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[The template directory.]]></description>
    </attribute>
    <attribute>
      <name>theme</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[The theme (other than default) to use for rendering the element]]></description>
    </attribute>
    <attribute>
      <name>title</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the html title attribute on rendered html element]]></description>
    </attribute>
    <attribute>
      <name>tooltip</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the tooltip of this particular component]]></description>
    </attribute>
    <attribute>
      <name>tooltipConfig</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Set the tooltip configuration]]></description>
    </attribute>
    <attribute>
      <name>value</name>
      <required>false</required>
      <rtexprvalue>true</rtexprvalue>
      <description><![CDATA[Preset the value of input element.]]></description>
    </attribute>
  </tag>

struts2-number-plugin插件 

用法：与textfield几乎一模一样，只是多了一个displayFormat的属性，其格式取值例如：###.0#