VII Practice -- some methods of common tools

1. StringUtils.isNotBlank( Parameters )： Determine whether a string is not empty and its length is not 0 And not by whitespace (whitespace) constitute , be equal to !isBlank(String str)
2. Jsoup.clean(news1.getNewsContent(), Safelist.none())： Parameters 2 Fix ,Whitelist whitelist Parameter method is deprecated , Now it is replaced by this . This method is right HTML Tag to filter , Specific filtering rules , see Safelist Which method the class calls .

• none()
  The API Will clear all HTML label , Keep only text nodes .
• simpleText()
  The API Will only be retained b, em, i, strong, u label , All but that HTML The tags will be removed .
• basic()
  The API Will retain a, b, blockquote, br, cite, code, dd, dl, dt, em, i, li, ol, p, pre, q, small, span, strike, strong, sub, sup, u, ul And its appropriate attribute tag , All but that HTML The tags will be removed , And the API Pictures are not allowed (img tag). In addition, the API Hyperlinks that are allowed to appear in the http, https, ftp, mailto And in the hyperlink mandatory addition rel=nofollow attribute .
• basicWithImages()
  The API In the reserved basic() Allow pictures as well as labels in (img tag) and img The relevant appropriate properties of , And its src Allow it to specify http or https.
• relaxed()
  The API Will only be retained a, b, blockquote, br, caption, cite, code, col, colgroup, dd, div, dl, dt, em, h1, h2, h3, h4, h5, h6, i, img, li, ol, p, pre, q, small, span, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, u, ul label , All but that HTML The tags will be removed , And there is no mandatory append in hyperlinks rel=nofollow attribute .