使用Jsoup.jar写的工具类(java提取Html中的文本)
package cn.anzhuoyue.jfinalBlog.util; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.safety.Whitelist; import com.jfinal.kit.StringKit; public class HtmlUtil { // 只有纯文本可以通过 public static String getText(String html) { if (html == null) return null; return Jsoup.clean(html, Whitelist.none()); } // 以下标签可以通过 // b, em, i, strong, u. 纯文本 public static String getSimpleHtml(String html) { if (html == null) return null; return Jsoup.clean(html, Whitelist.simpleText()); } // 以下标签可以通过 //a, b, blockquote, br, cite, code, dd, dl, dt, em, i, li, ol, p, pre, q, small, strike, strong, sub, sup, u, ul public static String getBasicHtml(String html) { if (html == null) return null; return Jsoup.clean(html, Whitelist.basic()); } //在basic基础上 增加图片通过 public static String getBasicHtmlandimage(String html) { if (html == null) return null; return Jsoup.clean(html, Whitelist.basicWithImages()); } // 以下标签可以通过 //a, b, blockquote, br, caption, cite, code, col, colgroup, dd, dl, dt, em, h1, h2, h3, h4, h5, h6, i, img, li, ol, p, pre, q, small, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, u, ul public static String getFullHtml(String html) { if (html == null) return null; return Jsoup.clean(html, Whitelist.relaxed()); } //只允许指定的html标签 public static String clearTags(String html, String ...tags) { Whitelist wl = new Whitelist(); return Jsoup.clean(html, wl.addTags(tags)); } // 对关键字加上颜色 public static String markKeywods (String keywords, String target) { if (StringKit.notBlank(keywords)) { String[] arr = keywords.split(" "); for (String s : arr) { if (StringKit.notBlank(s)) { String temp = "<span class=\"highlight\">" + s + "</span>"; if(temp!=null) target = target.replaceAll(s, temp); } } } return target; } // 获取文章中的img url public static String getImgSrc(String html) { if (html == null) return null; Document doc = Jsoup.parseBodyFragment(html); Element image = doc.select("img").first(); return image == null ? null : image.attr("src"); } }