强大的Java 的HTML 解析器，jsoup 1.7.1 发布

jopen 12年前

jsoup 是一款 Java 的HTML 解析器，可直接解析某个URL地址、HTML文本内容。它提供了一套非常省力的API，可通过DOM，CSS以及类似于JQuery的操作方法来取出和操作数据。

jsoup的主要功能如下：

  1. 从一个URL，文件或字符串中解析HTML；
  2. 使用DOM或CSS选择器来查找、取出数据；
  3. 可操作HTML元素、属性、文本；

本站还翻译了官方的CookBook中文文档:http://www.open-open.com/jsoup

示例代码：

File input = new File("/tmp/input.html");  Document doc = Jsoup.parse(input, "UTF-8", "http://example.com/");    Element content = doc.getElementById("content");  Elements links = content.getElementsByTag("a");  for (Element link : links) {    String linkHref = link.attr("href");    String linkText = link.text();  }

jsoup 1.7.1 发布了，该版本在性能和稳定性方面都有不少提升，下载地址：

改进记录:

- 改进解析时间，比之前的版本快2.3x倍，降低了内存消耗。
- 选择元素时减少内存消耗和垃圾收集。
- 删除不必要的Tag.valueOf同步，从而使多线程解析，运行速度更快。
- Introduced finer granularity of exceptions in Jsoup.connect, including HttpStatusException and UnsupportedMimeTypeException, allowing programmers better control of error cases.
- In Jsoup.clean, allow custom Document.OutputSettings, to control pretty printing, character set, and entity escaping.
- Whitespace normalise document.title() output.
- In Jsoup.connect, fail faster if the return content type is not supported.
- Made entity decoding less greedy, so that non-entities are less likely to be incorrectly treated as entities.
- In Jsoup.connect, enforce a connection disconnect after every connect. This precludes keep-alive connections to the same host, but in practise many implementations will leak connections, particularly on error.
- 如果服务器不指定Content-Type头，把它当作OK。
- 如果服务器返回一个不支持的字符集头，试图解码的默认字符集（UTF8）的内容，而不是想逃与不支持的字符集异常。

Bug 修复:
- Fixed an issue when determining the Windows-1254 character-set from a meta tag when run in the Turkish locale.
- Fixed whitespace preservation in textarea tags.
- Fixed an issue that prevented frameset documents to be cleaned by the Cleaner.
- Fixed an issue when normalising whitespace for strings containing high-surrogate characters.
</div> after every connect. This precludes keep-alive connections to the same host, but in practise many implementations will leak connections, particularly on error. - If a server doesn't specify a content-type header, treat that as OK. - If a server returns an unsupported character-set header, attempt to decode the content with the default charset (UTF8), instead of bailing with an unsupported charset exception. Bug fixes: - Fixed an issue when determining the Windows-1254 character-set from a meta tag when run in the Turkish locale. - Fixed whitespace preservation in textarea tags. - Fixed an issue that prevented frameset documents to be cleaned by the Cleaner. - Fixed an issue when normalising whitespace for strings containing high-surrogate characters.

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