Jsuop Whitelist

Posted 2020-11-18 最初的梦想

Jsuop使用示例代码

使用jsoup html Cleaner 方法进行清除，但需要指定一个可配置的 Whitelist。http://jsoup.org/apidocs/org/jsoup/safety/Whitelist.html   (Jsoup whitelist文档)

String unsafe = 
  "<p><a href=‘http://example.com/‘ onclick=‘stealCookies()‘>Link</a></p>";
String safe = Jsoup.clean(unsafe, Whitelist.basic());
// now: <p><a href="http://example.com/" rel="nofollow">Link</a></p>

public class JsoupUtil {

   /**
    * 使用自带的basicWithImages 白名单
    * 允许的便签有a,b,blockquote,br,cite,code,dd,dl,dt,em,i,li,ol,p,pre,q,small,span,
    * strike,strong,sub,sup,u,ul,img
    * 以及a标签的href,img标签的src,align,alt,height,width,title属性
    */
   private static final Whitelist whitelist = Whitelist.basicWithImages();
   /** 配置过滤化参数,不对代码进行格式化 */
   private static final Document.OutputSettings outputSettings = new Document.OutputSettings().prettyPrint(false);
   static {
      // 富文本编辑时一些样式是使用style来进行实现的
      // 比如红色字体 style="color:red;"
      // 所以需要给所有标签添加style属性
      whitelist.addAttributes(":all", "style");
   }

   public static String clean(String content) {
      return Jsoup.clean(content, "", whitelist, outputSettings);
   }
   
   public static void main(String[] args) throws FileNotFoundException, IOException {
      String text = "<a href="http://www.baidu.com/a" onclick="alert(1);">sss</a><script>alert(0);</script>sss";
      System.out.println(clean(text));
   }

}