📄 htmlpageparser.java
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package com.opensymphony.module.sitemesh.parser;import com.opensymphony.module.sitemesh.Page;import com.opensymphony.module.sitemesh.PageParser;import com.opensymphony.module.sitemesh.html.HTMLProcessor;import com.opensymphony.module.sitemesh.html.State;import com.opensymphony.module.sitemesh.html.StateTransitionRule;import com.opensymphony.module.sitemesh.html.tokenizer.TagTokenizer;import com.opensymphony.module.sitemesh.html.util.CharArray;import com.opensymphony.module.sitemesh.html.rules.BodyTagRule;import com.opensymphony.module.sitemesh.html.rules.ContentBlockExtractingRule;import com.opensymphony.module.sitemesh.html.rules.FramesetRule;import com.opensymphony.module.sitemesh.html.rules.HeadExtractingRule;import com.opensymphony.module.sitemesh.html.rules.HtmlAttributesRule;import com.opensymphony.module.sitemesh.html.rules.MSOfficeDocumentPropertiesRule;import com.opensymphony.module.sitemesh.html.rules.MetaTagRule;import com.opensymphony.module.sitemesh.html.rules.ParameterExtractingRule;import com.opensymphony.module.sitemesh.html.rules.TitleExtractingRule;import com.opensymphony.module.sitemesh.html.rules.PageBuilder;import java.io.IOException;/** * <p>Builds an HTMLPage object from an HTML document. This behaves * similarly to the FastPageParser, however it's a complete rewrite that is simpler to add custom features to such as * extraction and transformation of elements.</p> * * <p>To customize the rules used, this class can be extended and have the userDefinedRules() methods overridden.</p> * * @author Joe Walnes * * @see HTMLProcessor */public class HTMLPageParser implements PageParser { public Page parse(char[] data) throws IOException { CharArray head = new CharArray(64); CharArray body = new CharArray(4096); TokenizedHTMLPage page = new TokenizedHTMLPage(data, body, head); HTMLProcessor processor = new HTMLProcessor(data, body); State html = processor.defaultState(); // Core rules for SiteMesh to be functional. html.addRule(new HeadExtractingRule(head)); // contents of <head> html.addRule(new BodyTagRule(page, body)); // contents of <body> html.addRule(new TitleExtractingRule(page)); // the <title> html.addRule(new FramesetRule(page)); // if the page is a frameset // Additional rules - designed to be tweaked. addUserDefinedRules(html, page); processor.process(); return page; } protected void addUserDefinedRules(State html, PageBuilder page) { // Ensure that while in <xml> tag, none of the other rules kick in. // For example <xml><book><title>hello</title></book></xml> should not change the affect the title of the page. State xml = new State(); html.addRule(new StateTransitionRule("xml", xml)); // Useful properties html.addRule(new HtmlAttributesRule(page)); // attributes in <html> element html.addRule(new MetaTagRule(page)); // all <meta> tags html.addRule(new ParameterExtractingRule(page)); // <parameter> blocks html.addRule(new ContentBlockExtractingRule(page)); // <content> blocks // Capture properties written to documents by MS Office (author, version, company, etc). // Note: These properties are from the xml state, not the html state. xml.addRule(new MSOfficeDocumentPropertiesRule(page)); }}⌨️ 快捷键说明
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