add method

hutool-core/src/main/java/cn/hutool/core/date/DateTime.java

@@ -12,6 +12,7 @@ import java.sql.Timestamp;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.time.Instant;
+import java.time.LocalDateTime;
 import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
@@ -701,6 +702,16 @@ public class DateTime extends Date {
 		return new java.sql.Date(getTime());
 	}
 
+	/**
+	 * 转换为 {@link LocalDateTime}
+	 *
+	 * @return {@link LocalDateTime}
+	 * @since 5.7.16
+	 */
+	public LocalDateTime toLocalDateTime() {
+		return LocalDateTimeUtil.of(this);
+	}
+
 	/**
 	 * 计算相差时长
 	 *

hutool-core/src/main/java/cn/hutool/core/text/CharSequenceUtil.java

@@ -18,6 +18,7 @@ import cn.hutool.core.util.StrUtil;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
 import java.text.MessageFormat;
+import java.text.Normalizer;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.LinkedList;
@@ -4338,7 +4339,21 @@ public class CharSequenceUtil {
 	 * @return 给定字符串的所有字符是否都一样
 	 * @since 5.7.3
 	 */
-	public static boolean isCharEquals(String str) {
-		return isBlank(str.replace(str.charAt(0), CharUtil.SPACE));
+	public static boolean isCharEquals(CharSequence str) {
+		Assert.notEmpty(str, "Str to check must be not empty!");
+		return count(str, str.charAt(0)) == str.length();
+	}
+
+	/**
+	 * 对字符串归一化处理，如 "Á" 可以使用 "u00C1"或 "u0041u0301"表示，实际测试中两个字符串并不equals<br>
+	 * 因此使用此方法归一为一种表示形式，默认按照W3C通常建议的，在NFC中交换文本。
+	 *
+	 * @param str 归一化的字符串
+	 * @return 归一化后的字符串
+	 * @see Normalizer#normalize(CharSequence, Normalizer.Form)
+	 * @since 5.7.16
+	 */
+	public static String normalize(CharSequence str) {
+		return Normalizer.normalize(str, Normalizer.Form.NFC);
 	}
 }

hutool-core/src/test/java/cn/hutool/core/text/CharSequenceUtilTest.java

@@ -33,5 +33,19 @@ public class CharSequenceUtilTest {
 		Assert.assertEquals( str + " is Good", result);
 	}
 
+	@Test
+	public void normalizeTest(){
+		// https://blog.csdn.net/oscar999/article/details/105326270
+
+		String str1 = "\u00C1";
+		String str2 = "\u0041\u0301";
+
+		Assert.assertNotEquals(str1, str2);
+
+		str1 = CharSequenceUtil.normalize(str1);
+		str2 = CharSequenceUtil.normalize(str2);
+		Assert.assertEquals(str1, str2);
+	}
+
 	// ------------------------------------------------------------------------ remove
 }