SPR-4700 - Add single checkbox input macro for Velocity and Freemarker

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/view/freemarker/spring.ftl

@@ -296,6 +296,23 @@
     <input type="hidden" name="_${status.expression}" value="on"/>
 </#macro>
 
+<#--
+ * formCheckbox
+ *
+ * Show a single checkbox.
+ *
+ * @param path the name of the field to bind to
+ * @param attributes any additional attributes for the element (such as class
+ *    or CSS styles or size
+-->
+<#macro formCheckbox path attributes="">
+	<@bind path />
+	<#local checked><#if status.value?? && status.value?string=="true">true<#else>false</#if></#local>
+	<#local id><#if status.expression??>${status.expression}<#else>${path}</#if></#local>
+	<input type="hidden" name="_${id}" value="on"/>
+	<input type="checkbox" id="${id}" name="${id}" checked="${checked}" ${attributes}/>
+</#macro>
+
 <#--
  * showErrors
  *

org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/view/velocity/spring.vm

@@ -269,6 +269,21 @@
     <input type="hidden" name="_${status.expression}" value="on"/>
 #end
 
+#**
+ * springFormCheckbox
+ *
+ * Show a single checkbox.
+ *
+ * @param path the name of the field to bind to
+ * @param attributes any additional attributes for the element (such as class
+ *    or CSS styles or size
+*#
+#macro( springFormCheckbox $path $attributes )
+    #springBind($path)
+ 	<input type="hidden" name="_${status.expression}" value="on"/>
+	<input type="checkbox" id="${status.expression}" name="${status.expression}" checked="#if("$!{status.value}"=="true")true#{else}false#end" ${attributes}/>
+#end
+
 #**
  * springShowErrors
  *