✨ 添加 HTMLUtil

ballcat-common/ballcat-common-core/pom.xml

@@ -58,5 +58,9 @@
 			<scope>compile</scope>
 		</dependency>
 
+		<dependency>
+			<groupId>org.jsoup</groupId>
+			<artifactId>jsoup</artifactId>
+		</dependency>
     </dependencies>
 </project>

ballcat-common/ballcat-common-core/src/main/java/com/hccake/ballcat/common/core/util/HtmlUtil.java

@@ -0,0 +1,45 @@
+package com.hccake.ballcat.common.core.util;
+
+import cn.hutool.core.util.StrUtil;
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.jsoup.safety.Whitelist;
+
+/**
+ * @author Hccake 2020/12/21
+ * @version 1.0
+ */
+public class HtmlUtil {
+
+	/**
+	 * html 转字符串，保留换行样式
+	 * @link https://stackoverflow.com/questions/5640334/how-do-i-preserve-line-breaks-when-using-jsoup-to-convert-html-to-plain-text
+	 * @param html html字符串
+	 * @param mergeLineBreak 是否合并换行符
+	 * @return 保留换行格式的纯文本
+	 */
+	public static String toText(String html, boolean mergeLineBreak) {
+		if (StrUtil.isEmpty(html)) {
+			return html;
+		}
+		Document document = Jsoup.parse(html);
+		// makes html() preserve linebreaks and spacing
+		document.outputSettings(new Document.OutputSettings().prettyPrint(false));
+		document.select("br").append("\\n");
+		document.select("p").prepend("\\n\\n");
+		String s = document.html().replaceAll("\\\\n", "\n");
+		String result = Jsoup.clean(s, "", Whitelist.none(), new Document.OutputSettings().prettyPrint(false));
+		// 合并多个换行
+		return mergeLineBreak ? result.replaceAll("(\r?\n(\\s*\r?\n)+)", "\n") : result;
+	}
+
+	/**
+	 * html 转字符串，保留换行样式，默认合并换行符
+	 * @param html html字符串
+	 * @return 保留换行格式的纯文本
+	 */
+	public static String toText(String html) {
+		return toText(html, true);
+	}
+
+}