提取html中的文本内容的工具类（jsoup）

迈不过友情╰ 2022-01-29 05:59 271阅读 0赞

1、项目中添加依赖

<dependency>
      <groupId>org.jsoup</groupId>
      <artifactId>jsoup</artifactId>
      <version>1.11.3</version>
    </dependency>

工具类中给关键字加高亮的方法需要使用到jfinal的StringKit类，此类在jfinal2.0之后的版本中被剔除，需要导入2.0之前的版本

<dependency>
      <groupId>com.jfinal</groupId>
      <artifactId>jfinal</artifactId>
      <version>2.0</version>
    </dependency>

2、编写工具类

package com.szhtp.common.util;
    
    import org.jsoup.Jsoup;
    import org.jsoup.safety.Whitelist;
    import org.jsoup.nodes.Document;
    import org.jsoup.nodes.Element;
    import com.jfinal.kit.StringKit;
    
    public class HtmlUtils {
    
        // 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()).replace(" ", "");
        }
          
        // 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");
        }
    }