Java element to html
A document that models HTML. The purpose of this model is to support both browsing and editing. As a result, the structure described by an HTML document is not exactly replicated by default. The element structure that is modeled by default, is built by the class HTMLDocument.HTMLReader , which implements the HTMLEditorKit.ParserCallback protocol that the parser expects. To change the structure one can subclass HTMLReader , and reimplement the method getReader(int) to return the new reader implementation. The documentation for HTMLReader should be consulted for the details of the default structure created. The intent is that the document be non-lossy (although reproducing the HTML format may result in a different format). The document models only HTML, and makes no attempt to store view attributes in it. The elements are identified by the StyleContext.NameAttribute attribute, which should always have a value of type HTML.Tag that identifies the kind of element. Some of the elements (such as comments) are synthesized. The HTMLFactory uses this attribute to determine what kind of view to build. This document supports incremental loading. The TokenThreshold property controls how much of the parse is buffered before trying to update the element structure of the document. This property is set by the EditorKit so that subclasses can disable it. The Base property determines the URL against which relative URLs are resolved. By default, this will be the Document.StreamDescriptionProperty if the value of the property is a URL. If a tag is encountered, the base will become the URL specified by that tag. Because the base URL is a property, it can of course be set directly. The default content storage mechanism for this document is a gap buffer ( GapContent ). Alternatives can be supplied by using the constructor that takes a Content implementation.
Modifying HTMLDocument
The following examples illustrate using these methods. Each example assumes the HTML document is initialized in the following way:
JEditorPane p = new JEditorPane(); p.setContentType("text/html"); p.setText(". "); // Document text is provided below. HTMLDocument d = (HTMLDocument) p.getDocument(); With the following HTML content:
div < background-color: silver; >ulParagraph 1
Paragraph 2
All the methods for modifying an HTML document require an Element . Elements can be obtained from an HTML document by using the method getElement(Element e, Object attribute, Object value) . It returns the first descendant element that contains the specified attribute with the given value, in depth-first order. For example, d.getElement(d.getDefaultRootElement(), StyleConstants.NameAttribute, HTML.Tag.P) returns the first paragraph element.
A convenient shortcut for locating elements is the method getElement(String) ; returns an element whose ID attribute matches the specified value. For example, d.getElement(«BOX») returns the DIV element.
The getIterator(HTML.Tag t) method can also be used for finding all occurrences of the specified HTML tag in the document.
Inserting elements
Replacing elements
Summary
The following table shows the example document and the results of various methods described above.