add UnsafeUtil

hutool-core/src/main/java/org/dromara/hutool/core/util/UnsafeUtil.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2024. 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:
+ *          https://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.core.util;
+
+import org.dromara.hutool.core.reflect.FieldUtil;
+import sun.misc.Unsafe;
+
+import java.lang.reflect.Field;
+
+/**
+ * {@link Unsafe}对象获取工具<br>
+ * 参考：fastjson2/util/JDKUtils.java<br>
+ * 此工具类通过反射获取，绕开安全检查。
+ *
+ * @author Looly
+ * @since 6.0.0
+ */
+public class UnsafeUtil {
+	private static final Unsafe UNSAFE;
+
+	static {
+		final String fieldName = JdkUtil.IS_ANDROID ? "THE_ONE" : "theUnsafe";
+		final Field theUnsafeField = FieldUtil.getField(Unsafe.class, fieldName);
+		UNSAFE = (Unsafe) FieldUtil.getStaticFieldValue(theUnsafeField);
+	}
+
+	/**
+	 * 获取{@link Unsafe}对象
+	 *
+	 * @return {@link Unsafe}
+	 */
+	public static Unsafe getUnsafe() {
+		return UNSAFE;
+	}
+}