fix code

hutool-json/src/main/java/org/dromara/hutool/json/JSONTokener.java

@@ -248,9 +248,14 @@ public class JSONTokener extends ReaderWrapper {
 			c = this.next();
 			switch (c) {
 				case 0:
+					throw this.syntaxError("Unterminated string");
 				case '\n':
 				case '\r':
-					throw this.syntaxError("Unterminated string");
+					//throw this.syntaxError("Unterminated string");
+					// https://gitee.com/dromara/hutool/issues/I76CSU
+					// 兼容非转义符
+					sb.append(c);
+					break;
 				case '\\':// 转义符
 					c = this.next();
 					switch (c) {

hutool-json/src/test/java/org/dromara/hutool/json/IssueI76CSUTest.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2023 looly(loolly@aliyun.com)
+ * Hutool is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *          http://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+package org.dromara.hutool.json;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+/**
+ * https://gitee.com/dromara/hutool/issues/I76CSU
+ */
+public class IssueI76CSUTest {
+	@Test
+	void parseTest() {
+		final String str = "{ \"card\": true, \"content\": \"【标题】\n摘要\", \"time\": 1678434181000}";
+		final JSONObject entries = JSONUtil.parseObj(str);
+		Assertions.assertEquals("【标题】\n摘要", entries.getStr("content"));
+	}
+}