jsp中sitemesh修改tagRule技术分享_JSP编程_

 /** * Extracts the contents of any elements that look like * ... and write the contents * to a page property (page.foo). * * 
This is a cheap and cheerful mechanism for embedding multiple components in a * page that can be used in different places in decorators.
 * * @author Joe Walnes */ public class ContentBlockExtractingRule extends BasicBlockRule { private final ContentProperty propertyToExport; public ContentBlockExtractingRule(ContentProperty propertyToExport) { this.propertyToExport = propertyToExport; } @Override protected String processStart(Tag tag) throws IOException { tagProcessorContext.pushBuffer(); return tag.getAttributeValue("tag", false); } @Override protected void processEnd(Tag tag, String tagId) throws IOException { propertyToExport.getChild(tagId).setValue(tagProcessorContext.currentBufferContents()); tagProcessorContext.popBuffer(); } }

 public class ScriptTagRuleBundle implements TagRuleBundle { @Override public void install(State defaultState, ContentProperty contentProperty, SiteMeshContext siteMeshContext) { defaultState.addRule("content", new ContentBlockExtractingRule(contentProperty.getChild("page"))); } @Override public void cleanUp(State defaultState, ContentProperty contentProperty, SiteMeshContext siteMeshContext) { } }

 propertyToExport.getChild(tagId).setValue(tagProcessorContext.currentBufferContents());