從文件加載文檔

Problem

You have a file on disk that contains HTML, that you'd like to load and parse, and then maybe manipulate or extract data from.

Solution

Use the static Jsoup.parse(File in, String charsetName, String baseUri) method:

File input = new File("/tmp/input.html");
Document doc = Jsoup.parse(input, "UTF-8", "http://example.com/");

Description

The parse(File in, String charsetName, String baseUri) method loads and parses a HTML file. If an error occurs whilst loading the file, it will throw an IOException, which you should handle appropriately.

The baseUri parameter is used by the parser to resolve relative URLs in the document before a <base href> element is found. If that's not a concern for you, you can pass an empty string instead.

There is a sister method parse(File in, String charsetName) which uses the file's location as the baseUri. This is useful if you are working on a filesystem-local site and the relative links it points to are also on the filesystem.