You can use JTidy as an html checker/prettyprinter or as a DOM parser.
First of all, you will need to
download
a JTidy distribution. Inside it you will find a
jtidy-{version}.jar, where
{version}
is the JTidy release number: this is the jar containing all the JTidy classes you need, and we will name
it this simply jtidy.jar
in the following how to. No other libraries are needed.
Now that you have JTidy you can use it in different ways.
Run
java -jar jtidy.jar {options}
to access JTidy command line interface.
java -jar jtidy.jar -h
will output a short help on jtidy command line with a few examples.
java -jar jtidy.jar -help-config
will output all the available configuration options and
java -jar jtidy.jar -show-config
the current (default) values.
Detailed instructions on how to use the JTidy ant task can be found in JTidyTask javadocs.
The entry point for accessing JTidy functionalities is the
org.w3c.tidy.Tidy
class. This is a simple example of use:
Tidy tidy = new Tidy(); // obtain a new Tidy instance
tidy.setXHTML(boolean xhtml); // set desired config options using tidy setters
... // (equivalent to command line options)
tidy.parse(inputStream, System.out); // run tidy, providing an input and output stream
Using
parseDOM(java.io.InputStream in, java.io.OutputStream out)
instead of
parse()
you will also obtain a DOM document you can parse and print out later using
pprint(org.w3c.dom.Document doc, java.io.OutputStream out)
(note that the JTidy DOM implementation is not fully-featured, and many DOM methods are not
supported).
Starting from release r8, JTidy also provide a MessageListener interface you can implement to be notified for warning and errors in your html code. For details on advanced uses refer to jtidy javadocs.