From 56e8628d44976d0f6e7add03900fbb4e7723c4dc Mon Sep 17 00:00:00 2001
From: b2baccline <23131013+b2baccline@users.noreply.github.com>
Date: Wed, 23 Dec 2020 19:14:50 +0800
Subject: [PATCH] =?UTF-8?q?:sparkles:=20=E6=B7=BB=E5=8A=A0=20HTMLUtil?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ballcat-common/ballcat-common-core/pom.xml    |  4 ++
 .../ballcat/common/core/util/HtmlUtil.java    | 45 +++++++++++++++++++
 ballcat-dependencies/pom.xml                  |  7 +++
 3 files changed, 56 insertions(+)
 create mode 100644 ballcat-common/ballcat-common-core/src/main/java/com/hccake/ballcat/common/core/util/HtmlUtil.java

diff --git a/ballcat-common/ballcat-common-core/pom.xml b/ballcat-common/ballcat-common-core/pom.xml
index 4b2c5046..48e5f27b 100644
--- a/ballcat-common/ballcat-common-core/pom.xml
+++ b/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>
\ No newline at end of file
diff --git a/ballcat-common/ballcat-common-core/src/main/java/com/hccake/ballcat/common/core/util/HtmlUtil.java b/ballcat-common/ballcat-common-core/src/main/java/com/hccake/ballcat/common/core/util/HtmlUtil.java
new file mode 100644
index 00000000..9a7b3367
--- /dev/null
+++ b/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);
+	}
+
+}
diff --git a/ballcat-dependencies/pom.xml b/ballcat-dependencies/pom.xml
index 9ee8f130..de2e94dc 100644
--- a/ballcat-dependencies/pom.xml
+++ b/ballcat-dependencies/pom.xml
@@ -55,6 +55,7 @@
 		<easyexcel.version>2.2.6</easyexcel.version>
 		<jasypt.version>3.0.3</jasypt.version>
 		<hibernate-validator.version>6.1.7.Final</hibernate-validator.version>
+		<jsoup.version>1.13.1</jsoup.version>
 	</properties>
 
 	<dependencyManagement>
@@ -254,6 +255,12 @@
 				<version>${hibernate-validator.version}</version>
 			</dependency>
 
+			<dependency>
+				<groupId>org.jsoup</groupId>
+				<artifactId>jsoup</artifactId>
+				<version>${jsoup.version}</version>
+			</dependency>
+
 		</dependencies>
 	</dependencyManagement>