RadioButtonTag (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.web.servlet.tags.form
Class RadioButtonTag

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      org.springframework.web.servlet.tags.RequestContextAwareTag
          org.springframework.web.servlet.tags.HtmlEscapingAwareTag
              org.springframework.web.servlet.tags.form.AbstractFormTag
                  org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag
                      org.springframework.web.servlet.tags.form.AbstractHtmlElementTag
                          org.springframework.web.servlet.tags.form.AbstractHtmlInputElementTag
                              org.springframework.web.servlet.tags.form.RadioButtonTag

All Implemented Interfaces:: Serializable, IterationTag, JspTag, Tag, TryCatchFinally

public class RadioButtonTag
extends AbstractHtmlInputElementTag
extends AbstractHtmlInputElementTag

Databinding-aware JSP tag for rendering an HTML 'input' element with a 'type' of 'radio'.

Rendered elements are marked as 'checked' if the configured value matches the bound value.

A typical usage pattern will involved multiple tag instances bound to the same property but with different values.

Since:: 2.0
Author:: Rob Harrop
See Also:: Serialized Form

Fields inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlInputElementTag
`ACCESSKEY_ATTRIBUTE, DISABLED_ATTRIBUTE, ONBLUR_ATTRIBUTE, ONCHANGE_ATTRIBUTE, ONFOCUS_ATTRIBUTE, READONLY_ATTRIBUTE`

Fields inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlElementTag
`CLASS_ATTRIBUTE, DIR_ATTRIBUTE, LANG_ATTRIBUTE, ONCLICK_ATTRIBUTE, ONDBLCLICK_ATTRIBUTE, ONKEYDOWN_ATTRIBUTE, ONKEYPRESS_ATTRIBUTE, ONKEYUP_ATTRIBUTE, ONMOUSEDOWN_ATTRIBUTE, ONMOUSEMOVE_ATTRIBUTE, ONMOUSEOUT_ATTRIBUTE, ONMOUSEOVER_ATTRIBUTE, ONMOUSEUP_ATTRIBUTE, STYLE_ATTRIBUTE, TABINDEX_ATTRIBUTE, TITLE_ATTRIBUTE`

Fields inherited from class org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag
`COMMAND_NAME_ATTRIBUTE, COMMAND_NAME_VARIABLE_NAME, ID_ATTRIBUTE`

Fields inherited from class org.springframework.web.servlet.tags.RequestContextAwareTag
`logger, REQUEST_CONTEXT_PAGE_ATTRIBUTE`

Fields inherited from class javax.servlet.jsp.tagext.TagSupport
`pageContext`

Fields inherited from interface javax.servlet.jsp.tagext.IterationTag
`EVAL_BODY_AGAIN`

Fields inherited from interface javax.servlet.jsp.tagext.Tag
`EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE`

Constructor Summary
`RadioButtonTag()`

Method Summary
`protected String`	`autogenerateId()` Return a unique ID for the bound name within the current PageContext.
`protected Object`	`getValue()` Get the value of the '`value`' attribute.
`void`	`setValue(Object value)` Set the value of the '`value`' attribute.
`protected int`	`writeTagContent(TagWriter tagWriter)` Renders the '`input(radio)`' element with the configured `value`.

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlInputElementTag
`getAccesskey, getDisabled, getOnblur, getOnchange, getOnfocus, getReadonly, isDisabled, isReadonly, setAccesskey, setDisabled, setOnblur, setOnchange, setOnfocus, setReadonly, writeDefaultAttributes`

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractHtmlElementTag
`getCssClass, getCssErrorClass, getCssStyle, getDir, getLang, getOnclick, getOndblclick, getOnkeydown, getOnkeypress, getOnkeyup, getOnmousedown, getOnmousemove, getOnmouseout, getOnmouseover, getOnmouseup, getTabindex, getTitle, resolveCssClass, setCssClass, setCssErrorClass, setCssStyle, setDir, setLang, setOnclick, setOndblclick, setOnkeydown, setOnkeypress, setOnkeyup, setOnmousedown, setOnmousemove, setOnmouseout, setOnmouseover, setOnmouseup, setTabindex, setTitle`

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag
`doFinally, getBindStatus, getBoundValue, getCompletePath, getId, getName, getNestedPath, getPath, getPropertyEditor, setId, setPath`

Methods inherited from class org.springframework.web.servlet.tags.form.AbstractFormTag
`createTagWriter, doStartTagInternal, evaluate, getDisplayString, getDisplayString, writeOptionalAttribute`

Methods inherited from class org.springframework.web.servlet.tags.HtmlEscapingAwareTag
`isHtmlEscape, setHtmlEscape`

Methods inherited from class org.springframework.web.servlet.tags.RequestContextAwareTag
`doCatch, doStartTag, getRequestContext`

Methods inherited from class javax.servlet.jsp.tagext.TagSupport
`doAfterBody, doEndTag, findAncestorWithClass, getParent, getValue, getValues, release, removeValue, setPageContext, setParent, setValue`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

RadioButtonTag

public RadioButtonTag()

Method Detail

setValue

public void setValue(Object value)

Set the value of the 'value' attribute. May be a runtime expression.

getValue

protected Object getValue()

Get the value of the 'value' attribute. May be a runtime expression.

writeTagContent

protected int writeTagContent(TagWriter tagWriter)
                       throws JspException

Renders the 'input(radio)' element with the configured value. Marks the element as checked if the value matches the bound value.

Specified by:: writeTagContent in class AbstractFormTag

Returns:: valid tag render instruction as per Tag.doStartTag().
Throws:: JspException

autogenerateId

protected String autogenerateId()
                         throws JspException

Return a unique ID for the bound name within the current PageContext.

Overrides:: autogenerateId in class AbstractDataBoundFormElementTag

Throws:: JspException