diff --git a/CHANGELOG.md b/CHANGELOG.md
index 267aa6943..961ee4de4 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 * 【cache 】      Cache增加get重载，可自定义超时时间（issue#I8G0DL@Gitee）
 * 【cache 】      JWT#sign增加重载，可选是否增加默认的typ参数（issue#3386@Github）
 * 【db    】      增加识别OpenGauss的驱动类（issue#I8K6C0@Gitee）
+* 【core  】      修复CharSequenceUtil注释和引用，避免循环引用
 
 ### 🐞Bug修复
 * 【core  】      修复LocalDateTime#parseDate未判断空问题问题（issue#I8FN7F@Gitee）
diff --git a/hutool-core/src/main/java/cn/hutool/core/text/CharSequenceUtil.java b/hutool-core/src/main/java/cn/hutool/core/text/CharSequenceUtil.java
index 495fcc9e6..6b48d9120 100755
--- a/hutool-core/src/main/java/cn/hutool/core/text/CharSequenceUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/text/CharSequenceUtil.java
@@ -10,13 +10,7 @@ import cn.hutool.core.lang.func.Func1;
 import cn.hutool.core.text.finder.CharFinder;
 import cn.hutool.core.text.finder.Finder;
 import cn.hutool.core.text.finder.StrFinder;
-import cn.hutool.core.util.ArrayUtil;
-import cn.hutool.core.util.CharUtil;
-import cn.hutool.core.util.CharsetUtil;
-import cn.hutool.core.util.DesensitizedUtil;
-import cn.hutool.core.util.NumberUtil;
-import cn.hutool.core.util.ReUtil;
-import cn.hutool.core.util.StrUtil;
+import cn.hutool.core.util.*;
 
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
@@ -65,10 +59,10 @@ public class CharSequenceUtil {
 	 *
 	 * <p>例：</p>
 	 * <ul>
-	 *     <li>{@code StrUtil.isBlank(null)     // true}</li>
-	 *     <li>{@code StrUtil.isBlank("")       // true}</li>
-	 *     <li>{@code StrUtil.isBlank(" \t\n")  // true}</li>
-	 *     <li>{@code StrUtil.isBlank("abc")    // false}</li>
+	 *     <li>{@code CharSequenceUtil.isBlank(null)     // true}</li>
+	 *     <li>{@code CharSequenceUtil.isBlank("")       // true}</li>
+	 *     <li>{@code CharSequenceUtil.isBlank(" \t\n")  // true}</li>
+	 *     <li>{@code CharSequenceUtil.isBlank("abc")    // false}</li>
 	 * </ul>
 	 *
 	 * <p>注意：该方法与 {@link #isEmpty(CharSequence)} 的区别是：
@@ -111,10 +105,10 @@ public class CharSequenceUtil {
 	 *
 	 * <p>例：</p>
 	 * <ul>
-	 *     <li>{@code StrUtil.isNotBlank(null)     // false}</li>
-	 *     <li>{@code StrUtil.isNotBlank("")       // false}</li>
-	 *     <li>{@code StrUtil.isNotBlank(" \t\n")  // false}</li>
-	 *     <li>{@code StrUtil.isNotBlank("abc")    // true}</li>
+	 *     <li>{@code CharSequenceUtil.isNotBlank(null)     // false}</li>
+	 *     <li>{@code CharSequenceUtil.isNotBlank("")       // false}</li>
+	 *     <li>{@code CharSequenceUtil.isNotBlank(" \t\n")  // false}</li>
+	 *     <li>{@code CharSequenceUtil.isNotBlank("abc")    // true}</li>
 	 * </ul>
 	 *
 	 * <p>注意：该方法与 {@link #isNotEmpty(CharSequence)} 的区别是：
@@ -136,10 +130,10 @@ public class CharSequenceUtil {
 	 *
 	 * <p>例：</p>
 	 * <ul>
-	 *     <li>{@code StrUtil.hasBlank()                  // true}</li>
-	 *     <li>{@code StrUtil.hasBlank("", null, " ")     // true}</li>
-	 *     <li>{@code StrUtil.hasBlank("123", " ")        // true}</li>
-	 *     <li>{@code StrUtil.hasBlank("123", "abc")      // false}</li>
+	 *     <li>{@code CharSequenceUtil.hasBlank()                  // true}</li>
+	 *     <li>{@code CharSequenceUtil.hasBlank("", null, " ")     // true}</li>
+	 *     <li>{@code CharSequenceUtil.hasBlank("123", " ")        // true}</li>
+	 *     <li>{@code CharSequenceUtil.hasBlank("123", "abc")      // false}</li>
 	 * </ul>
 	 *
 	 * <p>注意：该方法与 {@link #isAllBlank(CharSequence...)} 的区别在于：</p>
@@ -171,10 +165,10 @@ public class CharSequenceUtil {
 	 *
 	 * <p>例：</p>
 	 * <ul>
-	 *     <li>{@code StrUtil.isAllBlank()                  // true}</li>
-	 *     <li>{@code StrUtil.isAllBlank("", null, " ")     // true}</li>
-	 *     <li>{@code StrUtil.isAllBlank("123", " ")        // false}</li>
-	 *     <li>{@code StrUtil.isAllBlank("123", "abc")      // false}</li>
+	 *     <li>{@code CharSequenceUtil.isAllBlank()                  // true}</li>
+	 *     <li>{@code CharSequenceUtil.isAllBlank("", null, " ")     // true}</li>
+	 *     <li>{@code CharSequenceUtil.isAllBlank("123", " ")        // false}</li>
+	 *     <li>{@code CharSequenceUtil.isAllBlank("123", "abc")      // false}</li>
 	 * </ul>
 	 *
 	 * <p>注意：该方法与 {@link #hasBlank(CharSequence...)} 的区别在于：</p>
@@ -208,10 +202,10 @@ public class CharSequenceUtil {
 	 *
 	 * <p>例：</p>
 	 * <ul>
-	 *     <li>{@code StrUtil.isEmpty(null)     // true}</li>
-	 *     <li>{@code StrUtil.isEmpty("")       // true}</li>
-	 *     <li>{@code StrUtil.isEmpty(" \t\n")  // false}</li>
-	 *     <li>{@code StrUtil.isEmpty("abc")    // false}</li>
+	 *     <li>{@code CharSequenceUtil.isEmpty(null)     // true}</li>
+	 *     <li>{@code CharSequenceUtil.isEmpty("")       // true}</li>
+	 *     <li>{@code CharSequenceUtil.isEmpty(" \t\n")  // false}</li>
+	 *     <li>{@code CharSequenceUtil.isEmpty("abc")    // false}</li>
 	 * </ul>
 	 *
 	 * <p>注意：该方法与 {@link #isBlank(CharSequence)} 的区别是：该方法不校验空白字符。</p>
@@ -238,10 +232,10 @@ public class CharSequenceUtil {
 	 *
 	 * <p>例：</p>
 	 * <ul>
-	 *     <li>{@code StrUtil.isNotEmpty(null)     // false}</li>
-	 *     <li>{@code StrUtil.isNotEmpty("")       // false}</li>
-	 *     <li>{@code StrUtil.isNotEmpty(" \t\n")  // true}</li>
-	 *     <li>{@code StrUtil.isNotEmpty("abc")    // true}</li>
+	 *     <li>{@code CharSequenceUtil.isNotEmpty(null)     // false}</li>
+	 *     <li>{@code CharSequenceUtil.isNotEmpty("")       // false}</li>
+	 *     <li>{@code CharSequenceUtil.isNotEmpty(" \t\n")  // true}</li>
+	 *     <li>{@code CharSequenceUtil.isNotEmpty("abc")    // true}</li>
 	 * </ul>
 	 *
 	 * <p>注意：该方法与 {@link #isNotBlank(CharSequence)} 的区别是：该方法不校验空白字符。</p>
@@ -350,11 +344,11 @@ public class CharSequenceUtil {
 	 *
 	 * <p>例：</p>
 	 * <ul>
-	 *     <li>{@code StrUtil.hasEmpty()                  // true}</li>
-	 *     <li>{@code StrUtil.hasEmpty("", null)          // true}</li>
-	 *     <li>{@code StrUtil.hasEmpty("123", "")         // true}</li>
-	 *     <li>{@code StrUtil.hasEmpty("123", "abc")      // false}</li>
-	 *     <li>{@code StrUtil.hasEmpty(" ", "\t", "\n")   // false}</li>
+	 *     <li>{@code CharSequenceUtil.hasEmpty()                  // true}</li>
+	 *     <li>{@code CharSequenceUtil.hasEmpty("", null)          // true}</li>
+	 *     <li>{@code CharSequenceUtil.hasEmpty("123", "")         // true}</li>
+	 *     <li>{@code CharSequenceUtil.hasEmpty("123", "abc")      // false}</li>
+	 *     <li>{@code CharSequenceUtil.hasEmpty(" ", "\t", "\n")   // false}</li>
 	 * </ul>
 	 *
 	 * <p>注意：该方法与 {@link #isAllEmpty(CharSequence...)} 的区别在于：</p>
@@ -386,11 +380,11 @@ public class CharSequenceUtil {
 	 *
 	 * <p>例：</p>
 	 * <ul>
-	 *     <li>{@code StrUtil.isAllEmpty()                  // true}</li>
-	 *     <li>{@code StrUtil.isAllEmpty("", null)          // true}</li>
-	 *     <li>{@code StrUtil.isAllEmpty("123", "")         // false}</li>
-	 *     <li>{@code StrUtil.isAllEmpty("123", "abc")      // false}</li>
-	 *     <li>{@code StrUtil.isAllEmpty(" ", "\t", "\n")   // false}</li>
+	 *     <li>{@code CharSequenceUtil.isAllEmpty()                  // true}</li>
+	 *     <li>{@code CharSequenceUtil.isAllEmpty("", null)          // true}</li>
+	 *     <li>{@code CharSequenceUtil.isAllEmpty("123", "")         // false}</li>
+	 *     <li>{@code CharSequenceUtil.isAllEmpty("123", "abc")      // false}</li>
+	 *     <li>{@code CharSequenceUtil.isAllEmpty(" ", "\t", "\n")   // false}</li>
 	 * </ul>
 	 *
 	 * <p>注意：该方法与 {@link #hasEmpty(CharSequence...)} 的区别在于：</p>
@@ -422,11 +416,11 @@ public class CharSequenceUtil {
 	 *
 	 * <p>例：</p>
 	 * <ul>
-	 *     <li>{@code StrUtil.isAllNotEmpty()                  // false}</li>
-	 *     <li>{@code StrUtil.isAllNotEmpty("", null)          // false}</li>
-	 *     <li>{@code StrUtil.isAllNotEmpty("123", "")         // false}</li>
-	 *     <li>{@code StrUtil.isAllNotEmpty("123", "abc")      // true}</li>
-	 *     <li>{@code StrUtil.isAllNotEmpty(" ", "\t", "\n")   // true}</li>
+	 *     <li>{@code CharSequenceUtil.isAllNotEmpty()                  // false}</li>
+	 *     <li>{@code CharSequenceUtil.isAllNotEmpty("", null)          // false}</li>
+	 *     <li>{@code CharSequenceUtil.isAllNotEmpty("123", "")         // false}</li>
+	 *     <li>{@code CharSequenceUtil.isAllNotEmpty("123", "abc")      // true}</li>
+	 *     <li>{@code CharSequenceUtil.isAllNotEmpty(" ", "\t", "\n")   // true}</li>
 	 * </ul>
 	 *
 	 * <p>注意：该方法与 {@link #isAllEmpty(CharSequence...)} 的区别在于：</p>
@@ -534,11 +528,11 @@ public class CharSequenceUtil {
 	 * 除去字符串头尾部的空白，如果字符串是{@code null}，返回{@code ""}。
 	 *
 	 * <pre>
-	 * StrUtil.trimToEmpty(null)          = ""
-	 * StrUtil.trimToEmpty("")            = ""
-	 * StrUtil.trimToEmpty("     ")       = ""
-	 * StrUtil.trimToEmpty("abc")         = "abc"
-	 * StrUtil.trimToEmpty("    abc    ") = "abc"
+	 * CharSequenceUtil.trimToEmpty(null)          = ""
+	 * CharSequenceUtil.trimToEmpty("")            = ""
+	 * CharSequenceUtil.trimToEmpty("     ")       = ""
+	 * CharSequenceUtil.trimToEmpty("abc")         = "abc"
+	 * CharSequenceUtil.trimToEmpty("    abc    ") = "abc"
 	 * </pre>
 	 *
 	 * @param str 字符串
@@ -553,11 +547,11 @@ public class CharSequenceUtil {
 	 * 除去字符串头尾部的空白，如果字符串是{@code null}或者""，返回{@code null}。
 	 *
 	 * <pre>
-	 * StrUtil.trimToNull(null)          = null
-	 * StrUtil.trimToNull("")            = null
-	 * StrUtil.trimToNull("     ")       = null
-	 * StrUtil.trimToNull("abc")         = "abc"
-	 * StrUtil.trimToEmpty("    abc    ") = "abc"
+	 * CharSequenceUtil.trimToNull(null)          = null
+	 * CharSequenceUtil.trimToNull("")            = null
+	 * CharSequenceUtil.trimToNull("     ")       = null
+	 * CharSequenceUtil.trimToNull("abc")         = "abc"
+	 * CharSequenceUtil.trimToEmpty("    abc    ") = "abc"
 	 * </pre>
 	 *
 	 * @param str 字符串
@@ -1169,17 +1163,17 @@ public class CharSequenceUtil {
 	 * 指定范围内查找字符串，忽略大小写<br>
 	 *
 	 * <pre>
-	 * StrUtil.indexOfIgnoreCase(null, *, *)          = -1
-	 * StrUtil.indexOfIgnoreCase(*, null, *)          = -1
-	 * StrUtil.indexOfIgnoreCase("", "", 0)           = 0
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "A", 0)  = 0
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "B", 0)  = 2
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "AB", 0) = 1
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "B", 3)  = 5
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "B", 9)  = -1
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "B", -1) = 2
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "", 2)   = 2
-	 * StrUtil.indexOfIgnoreCase("abc", "", 9)        = -1
+	 * CharSequenceUtil.indexOfIgnoreCase(null, *, *)          = -1
+	 * CharSequenceUtil.indexOfIgnoreCase(*, null, *)          = -1
+	 * CharSequenceUtil.indexOfIgnoreCase("", "", 0)           = 0
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "A", 0)  = 0
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "B", 0)  = 2
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "AB", 0) = 1
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "B", 3)  = 5
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "B", 9)  = -1
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "B", -1) = 2
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "", 2)   = 2
+	 * CharSequenceUtil.indexOfIgnoreCase("abc", "", 9)        = -1
 	 * </pre>
 	 *
 	 * @param str       字符串
@@ -1195,17 +1189,17 @@ public class CharSequenceUtil {
 	 * 指定范围内查找字符串
 	 *
 	 * <pre>
-	 * StrUtil.indexOfIgnoreCase(null, *, *)          = -1
-	 * StrUtil.indexOfIgnoreCase(*, null, *)          = -1
-	 * StrUtil.indexOfIgnoreCase("", "", 0)           = 0
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "A", 0)  = 0
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "B", 0)  = 2
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "AB", 0) = 1
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "B", 3)  = 5
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "B", 9)  = -1
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "B", -1) = 2
-	 * StrUtil.indexOfIgnoreCase("aabaabaa", "", 2)   = 2
-	 * StrUtil.indexOfIgnoreCase("abc", "", 9)        = -1
+	 * CharSequenceUtil.indexOfIgnoreCase(null, *, *)          = -1
+	 * CharSequenceUtil.indexOfIgnoreCase(*, null, *)          = -1
+	 * CharSequenceUtil.indexOfIgnoreCase("", "", 0)           = 0
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "A", 0)  = 0
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "B", 0)  = 2
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "AB", 0) = 1
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "B", 3)  = 5
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "B", 9)  = -1
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "B", -1) = 2
+	 * CharSequenceUtil.indexOfIgnoreCase("aabaabaa", "", 2)   = 2
+	 * CharSequenceUtil.indexOfIgnoreCase("abc", "", 9)        = -1
 	 * </pre>
 	 *
 	 * @param str       字符串
@@ -1230,7 +1224,7 @@ public class CharSequenceUtil {
 	 */
 	public static int indexOf(CharSequence text, CharSequence searchStr, int from, boolean ignoreCase) {
 		if (isEmpty(text) || isEmpty(searchStr)) {
-			if (StrUtil.equals(text, searchStr)) {
+			if (CharSequenceUtil.equals(text, searchStr)) {
 				return 0;
 			} else {
 				return INDEX_NOT_FOUND;
@@ -1278,7 +1272,7 @@ public class CharSequenceUtil {
 	 */
 	public static int lastIndexOf(CharSequence text, CharSequence searchStr, int from, boolean ignoreCase) {
 		if (isEmpty(text) || isEmpty(searchStr)) {
-			if (StrUtil.equals(text, searchStr)) {
+			if (CharSequenceUtil.equals(text, searchStr)) {
 				return 0;
 			} else {
 				return INDEX_NOT_FOUND;
@@ -1298,17 +1292,17 @@ public class CharSequenceUtil {
 	 * 例子（*代表任意字符）：
 	 *
 	 * <pre>
-	 * StrUtil.ordinalIndexOf(null, *, *)          = -1
-	 * StrUtil.ordinalIndexOf(*, null, *)          = -1
-	 * StrUtil.ordinalIndexOf("", "", *)           = 0
-	 * StrUtil.ordinalIndexOf("aabaabaa", "a", 1)  = 0
-	 * StrUtil.ordinalIndexOf("aabaabaa", "a", 2)  = 1
-	 * StrUtil.ordinalIndexOf("aabaabaa", "b", 1)  = 2
-	 * StrUtil.ordinalIndexOf("aabaabaa", "b", 2)  = 5
-	 * StrUtil.ordinalIndexOf("aabaabaa", "ab", 1) = 1
-	 * StrUtil.ordinalIndexOf("aabaabaa", "ab", 2) = 4
-	 * StrUtil.ordinalIndexOf("aabaabaa", "", 1)   = 0
-	 * StrUtil.ordinalIndexOf("aabaabaa", "", 2)   = 0
+	 * CharSequenceUtil.ordinalIndexOf(null, *, *)          = -1
+	 * CharSequenceUtil.ordinalIndexOf(*, null, *)          = -1
+	 * CharSequenceUtil.ordinalIndexOf("", "", *)           = 0
+	 * CharSequenceUtil.ordinalIndexOf("aabaabaa", "a", 1)  = 0
+	 * CharSequenceUtil.ordinalIndexOf("aabaabaa", "a", 2)  = 1
+	 * CharSequenceUtil.ordinalIndexOf("aabaabaa", "b", 1)  = 2
+	 * CharSequenceUtil.ordinalIndexOf("aabaabaa", "b", 2)  = 5
+	 * CharSequenceUtil.ordinalIndexOf("aabaabaa", "ab", 1) = 1
+	 * CharSequenceUtil.ordinalIndexOf("aabaabaa", "ab", 2) = 4
+	 * CharSequenceUtil.ordinalIndexOf("aabaabaa", "", 1)   = 0
+	 * CharSequenceUtil.ordinalIndexOf("aabaabaa", "", 2)   = 0
 	 * </pre>
 	 *
 	 * @param str       被检查的字符串，可以为null
@@ -2106,13 +2100,13 @@ public class CharSequenceUtil {
 	 * 切割指定长度的后部分的字符串
 	 *
 	 * <pre>
-	 * StrUtil.subSufByLength("abcde", 3)      =    "cde"
-	 * StrUtil.subSufByLength("abcde", 0)      =    ""
-	 * StrUtil.subSufByLength("abcde", -5)     =    ""
-	 * StrUtil.subSufByLength("abcde", -1)     =    ""
-	 * StrUtil.subSufByLength("abcde", 5)       =    "abcde"
-	 * StrUtil.subSufByLength("abcde", 10)     =    "abcde"
-	 * StrUtil.subSufByLength(null, 3)               =    null
+	 * CharSequenceUtil.subSufByLength("abcde", 3)      =    "cde"
+	 * CharSequenceUtil.subSufByLength("abcde", 0)      =    ""
+	 * CharSequenceUtil.subSufByLength("abcde", -5)     =    ""
+	 * CharSequenceUtil.subSufByLength("abcde", -1)     =    ""
+	 * CharSequenceUtil.subSufByLength("abcde", 5)       =    "abcde"
+	 * CharSequenceUtil.subSufByLength("abcde", 10)     =    "abcde"
+	 * CharSequenceUtil.subSufByLength(null, 3)               =    null
 	 * </pre>
 	 *
 	 * @param string 字符串
@@ -2156,14 +2150,14 @@ public class CharSequenceUtil {
 	 * 如果分隔字符串为空串""，则返回空串，如果分隔字符串未找到，返回原字符串，举例如下：
 	 *
 	 * <pre>
-	 * StrUtil.subBefore(null, *, false)      = null
-	 * StrUtil.subBefore("", *, false)        = ""
-	 * StrUtil.subBefore("abc", "a", false)   = ""
-	 * StrUtil.subBefore("abcba", "b", false) = "a"
-	 * StrUtil.subBefore("abc", "c", false)   = "ab"
-	 * StrUtil.subBefore("abc", "d", false)   = "abc"
-	 * StrUtil.subBefore("abc", "", false)    = ""
-	 * StrUtil.subBefore("abc", null, false)  = "abc"
+	 * CharSequenceUtil.subBefore(null, *, false)      = null
+	 * CharSequenceUtil.subBefore("", *, false)        = ""
+	 * CharSequenceUtil.subBefore("abc", "a", false)   = ""
+	 * CharSequenceUtil.subBefore("abcba", "b", false) = "a"
+	 * CharSequenceUtil.subBefore("abc", "c", false)   = "ab"
+	 * CharSequenceUtil.subBefore("abc", "d", false)   = "abc"
+	 * CharSequenceUtil.subBefore("abc", "", false)    = ""
+	 * CharSequenceUtil.subBefore("abc", null, false)  = "abc"
 	 * </pre>
 	 *
 	 * @param string          被查找的字符串
@@ -2198,12 +2192,12 @@ public class CharSequenceUtil {
 	 * 如果分隔字符串未找到，返回原字符串，举例如下：
 	 *
 	 * <pre>
-	 * StrUtil.subBefore(null, *, false)      = null
-	 * StrUtil.subBefore("", *, false)        = ""
-	 * StrUtil.subBefore("abc", 'a', false)   = ""
-	 * StrUtil.subBefore("abcba", 'b', false) = "a"
-	 * StrUtil.subBefore("abc", 'c', false)   = "ab"
-	 * StrUtil.subBefore("abc", 'd', false)   = "abc"
+	 * CharSequenceUtil.subBefore(null, *, false)      = null
+	 * CharSequenceUtil.subBefore("", *, false)        = ""
+	 * CharSequenceUtil.subBefore("abc", 'a', false)   = ""
+	 * CharSequenceUtil.subBefore("abcba", 'b', false) = "a"
+	 * CharSequenceUtil.subBefore("abc", 'c', false)   = "ab"
+	 * CharSequenceUtil.subBefore("abc", 'd', false)   = "abc"
 	 * </pre>
 	 *
 	 * @param string          被查找的字符串
@@ -2234,14 +2228,14 @@ public class CharSequenceUtil {
 	 * 如果分隔字符串为空串（null或""），则返回空串，如果分隔字符串未找到，返回空串，举例如下：
 	 *
 	 * <pre>
-	 * StrUtil.subAfter(null, *, false)      = null
-	 * StrUtil.subAfter("", *, false)        = ""
-	 * StrUtil.subAfter(*, null, false)      = ""
-	 * StrUtil.subAfter("abc", "a", false)   = "bc"
-	 * StrUtil.subAfter("abcba", "b", false) = "cba"
-	 * StrUtil.subAfter("abc", "c", false)   = ""
-	 * StrUtil.subAfter("abc", "d", false)   = ""
-	 * StrUtil.subAfter("abc", "", false)    = "abc"
+	 * CharSequenceUtil.subAfter(null, *, false)      = null
+	 * CharSequenceUtil.subAfter("", *, false)        = ""
+	 * CharSequenceUtil.subAfter(*, null, false)      = ""
+	 * CharSequenceUtil.subAfter("abc", "a", false)   = "bc"
+	 * CharSequenceUtil.subAfter("abcba", "b", false) = "cba"
+	 * CharSequenceUtil.subAfter("abc", "c", false)   = ""
+	 * CharSequenceUtil.subAfter("abc", "d", false)   = ""
+	 * CharSequenceUtil.subAfter("abc", "", false)    = "abc"
 	 * </pre>
 	 *
 	 * @param string          被查找的字符串
@@ -2272,12 +2266,12 @@ public class CharSequenceUtil {
 	 * 如果分隔字符串为空串（null或""），则返回空串，如果分隔字符串未找到，返回空串，举例如下：
 	 *
 	 * <pre>
-	 * StrUtil.subAfter(null, *, false)      = null
-	 * StrUtil.subAfter("", *, false)        = ""
-	 * StrUtil.subAfter("abc", 'a', false)   = "bc"
-	 * StrUtil.subAfter("abcba", 'b', false) = "cba"
-	 * StrUtil.subAfter("abc", 'c', false)   = ""
-	 * StrUtil.subAfter("abc", 'd', false)   = ""
+	 * CharSequenceUtil.subAfter(null, *, false)      = null
+	 * CharSequenceUtil.subAfter("", *, false)        = ""
+	 * CharSequenceUtil.subAfter("abc", 'a', false)   = "bc"
+	 * CharSequenceUtil.subAfter("abcba", 'b', false) = "cba"
+	 * CharSequenceUtil.subAfter("abc", 'c', false)   = ""
+	 * CharSequenceUtil.subAfter("abc", 'd', false)   = ""
 	 * </pre>
 	 *
 	 * @param string          被查找的字符串
@@ -2304,16 +2298,16 @@ public class CharSequenceUtil {
 	 * 栗子：
 	 *
 	 * <pre>
-	 * StrUtil.subBetween("wx[b]yz", "[", "]") = "b"
-	 * StrUtil.subBetween(null, *, *)          = null
-	 * StrUtil.subBetween(*, null, *)          = null
-	 * StrUtil.subBetween(*, *, null)          = null
-	 * StrUtil.subBetween("", "", "")          = ""
-	 * StrUtil.subBetween("", "", "]")         = null
-	 * StrUtil.subBetween("", "[", "]")        = null
-	 * StrUtil.subBetween("yabcz", "", "")     = ""
-	 * StrUtil.subBetween("yabcz", "y", "z")   = "abc"
-	 * StrUtil.subBetween("yabczyabcz", "y", "z")   = "abc"
+	 * CharSequenceUtil.subBetween("wx[b]yz", "[", "]") = "b"
+	 * CharSequenceUtil.subBetween(null, *, *)          = null
+	 * CharSequenceUtil.subBetween(*, null, *)          = null
+	 * CharSequenceUtil.subBetween(*, *, null)          = null
+	 * CharSequenceUtil.subBetween("", "", "")          = ""
+	 * CharSequenceUtil.subBetween("", "", "]")         = null
+	 * CharSequenceUtil.subBetween("", "[", "]")        = null
+	 * CharSequenceUtil.subBetween("yabcz", "", "")     = ""
+	 * CharSequenceUtil.subBetween("yabcz", "y", "z")   = "abc"
+	 * CharSequenceUtil.subBetween("yabczyabcz", "y", "z")   = "abc"
 	 * </pre>
 	 *
 	 * @param str    被切割的字符串
@@ -2347,12 +2341,12 @@ public class CharSequenceUtil {
 	 * 栗子：
 	 *
 	 * <pre>
-	 * StrUtil.subBetween(null, *)            = null
-	 * StrUtil.subBetween("", "")             = ""
-	 * StrUtil.subBetween("", "tag")          = null
-	 * StrUtil.subBetween("tagabctag", null)  = null
-	 * StrUtil.subBetween("tagabctag", "")    = ""
-	 * StrUtil.subBetween("tagabctag", "tag") = "abc"
+	 * CharSequenceUtil.subBetween(null, *)            = null
+	 * CharSequenceUtil.subBetween("", "")             = ""
+	 * CharSequenceUtil.subBetween("", "tag")          = null
+	 * CharSequenceUtil.subBetween("tagabctag", null)  = null
+	 * CharSequenceUtil.subBetween("tagabctag", "")    = ""
+	 * CharSequenceUtil.subBetween("tagabctag", "tag") = "abc"
 	 * </pre>
 	 *
 	 * @param str            被切割的字符串
@@ -2370,17 +2364,17 @@ public class CharSequenceUtil {
 	 * 栗子：
 	 *
 	 * <pre>
-	 * StrUtil.subBetweenAll("wx[b]y[z]", "[", "]") 		= ["b","z"]
-	 * StrUtil.subBetweenAll(null, *, *)          			= []
-	 * StrUtil.subBetweenAll(*, null, *)          			= []
-	 * StrUtil.subBetweenAll(*, *, null)          			= []
-	 * StrUtil.subBetweenAll("", "", "")          			= []
-	 * StrUtil.subBetweenAll("", "", "]")         			= []
-	 * StrUtil.subBetweenAll("", "[", "]")        			= []
-	 * StrUtil.subBetweenAll("yabcz", "", "")     			= []
-	 * StrUtil.subBetweenAll("yabcz", "y", "z")   			= ["abc"]
-	 * StrUtil.subBetweenAll("yabczyabcz", "y", "z")   		= ["abc","abc"]
-	 * StrUtil.subBetweenAll("[yabc[zy]abcz]", "[", "]");   = ["zy"]           重叠时只截取内部，
+	 * CharSequenceUtil.subBetweenAll("wx[b]y[z]", "[", "]") 		= ["b","z"]
+	 * CharSequenceUtil.subBetweenAll(null, *, *)          			= []
+	 * CharSequenceUtil.subBetweenAll(*, null, *)          			= []
+	 * CharSequenceUtil.subBetweenAll(*, *, null)          			= []
+	 * CharSequenceUtil.subBetweenAll("", "", "")          			= []
+	 * CharSequenceUtil.subBetweenAll("", "", "]")         			= []
+	 * CharSequenceUtil.subBetweenAll("", "[", "]")        			= []
+	 * CharSequenceUtil.subBetweenAll("yabcz", "", "")     			= []
+	 * CharSequenceUtil.subBetweenAll("yabcz", "y", "z")   			= ["abc"]
+	 * CharSequenceUtil.subBetweenAll("yabczyabcz", "y", "z")   		= ["abc","abc"]
+	 * CharSequenceUtil.subBetweenAll("[yabc[zy]abcz]", "[", "]");   = ["zy"]           重叠时只截取内部，
 	 * </pre>
 	 *
 	 * @param str    被切割的字符串
@@ -2425,15 +2419,15 @@ public class CharSequenceUtil {
 	 * 栗子：
 	 *
 	 * <pre>
-	 * StrUtil.subBetweenAll(null, *)          			= []
-	 * StrUtil.subBetweenAll(*, null)          			= []
-	 * StrUtil.subBetweenAll(*, *)          			= []
-	 * StrUtil.subBetweenAll("", "")          			= []
-	 * StrUtil.subBetweenAll("", "#")         			= []
-	 * StrUtil.subBetweenAll("gotanks", "")     		= []
-	 * StrUtil.subBetweenAll("#gotanks#", "#")   		= ["gotanks"]
-	 * StrUtil.subBetweenAll("#hello# #world#!", "#")   = ["hello", "world"]
-	 * StrUtil.subBetweenAll("#hello# world#!", "#");   = ["hello"]
+	 * CharSequenceUtil.subBetweenAll(null, *)          			= []
+	 * CharSequenceUtil.subBetweenAll(*, null)          			= []
+	 * CharSequenceUtil.subBetweenAll(*, *)          			= []
+	 * CharSequenceUtil.subBetweenAll("", "")          			= []
+	 * CharSequenceUtil.subBetweenAll("", "#")         			= []
+	 * CharSequenceUtil.subBetweenAll("gotanks", "")     		= []
+	 * CharSequenceUtil.subBetweenAll("#gotanks#", "#")   		= ["gotanks"]
+	 * CharSequenceUtil.subBetweenAll("#hello# #world#!", "#")   = ["hello", "world"]
+	 * CharSequenceUtil.subBetweenAll("#hello# world#!", "#");   = ["hello"]
 	 * </pre>
 	 *
 	 * @param str             被切割的字符串
@@ -2452,9 +2446,9 @@ public class CharSequenceUtil {
 	 * 重复某个字符
 	 *
 	 * <pre>
-	 * StrUtil.repeat('e', 0)  = ""
-	 * StrUtil.repeat('e', 3)  = "eee"
-	 * StrUtil.repeat('e', -2) = ""
+	 * CharSequenceUtil.repeat('e', 0)  = ""
+	 * CharSequenceUtil.repeat('e', 3)  = "eee"
+	 * CharSequenceUtil.repeat('e', -2) = ""
 	 * </pre>
 	 *
 	 * @param c     被重复的字符
@@ -2522,7 +2516,7 @@ public class CharSequenceUtil {
 			return null;
 		}
 		if (padLen <= 0) {
-			return StrUtil.EMPTY;
+			return CharSequenceUtil.EMPTY;
 		}
 		final int strLen = str.length();
 		if (strLen == padLen) {
@@ -2543,9 +2537,9 @@ public class CharSequenceUtil {
 	 * 重复某个字符串并通过分界符连接
 	 *
 	 * <pre>
-	 * StrUtil.repeatAndJoin("?", 5, ",")   = "?,?,?,?,?"
-	 * StrUtil.repeatAndJoin("?", 0, ",")   = ""
-	 * StrUtil.repeatAndJoin("?", 5, null) = "?????"
+	 * CharSequenceUtil.repeatAndJoin("?", 5, ",")   = "?,?,?,?,?"
+	 * CharSequenceUtil.repeatAndJoin("?", 0, ",")   = ""
+	 * CharSequenceUtil.repeatAndJoin("?", 5, null) = "?????"
 	 * </pre>
 	 *
 	 * @param str       被重复的字符串
@@ -3071,10 +3065,10 @@ public class CharSequenceUtil {
 	 * 同：leftPad (org.apache.commons.lang3.leftPad)
 	 *
 	 * <pre>
-	 * StrUtil.padPre(null, *, *);//null
-	 * StrUtil.padPre("1", 3, "ABC");//"AB1"
-	 * StrUtil.padPre("123", 2, "ABC");//"12"
-	 * StrUtil.padPre("1039", -1, "0");//"103"
+	 * CharSequenceUtil.padPre(null, *, *);//null
+	 * CharSequenceUtil.padPre("1", 3, "ABC");//"AB1"
+	 * CharSequenceUtil.padPre("123", 2, "ABC");//"12"
+	 * CharSequenceUtil.padPre("1039", -1, "0");//"103"
 	 * </pre>
 	 *
 	 * @param str    字符串
@@ -3102,9 +3096,9 @@ public class CharSequenceUtil {
 	 * 同：leftPad (org.apache.commons.lang3.leftPad)
 	 *
 	 * <pre>
-	 * StrUtil.padPre(null, *, *);//null
-	 * StrUtil.padPre("1", 3, '0');//"001"
-	 * StrUtil.padPre("123", 2, '0');//"12"
+	 * CharSequenceUtil.padPre(null, *, *);//null
+	 * CharSequenceUtil.padPre("1", 3, '0');//"001"
+	 * CharSequenceUtil.padPre("123", 2, '0');//"12"
 	 * </pre>
 	 *
 	 * @param str     字符串
@@ -3131,10 +3125,10 @@ public class CharSequenceUtil {
 	 * 补充字符串以满足最小长度，如果提供的字符串大于指定长度，截断之
 	 *
 	 * <pre>
-	 * StrUtil.padAfter(null, *, *);//null
-	 * StrUtil.padAfter("1", 3, '0');//"100"
-	 * StrUtil.padAfter("123", 2, '0');//"23"
-	 * StrUtil.padAfter("123", -1, '0')//"" 空串
+	 * CharSequenceUtil.padAfter(null, *, *);//null
+	 * CharSequenceUtil.padAfter("1", 3, '0');//"100"
+	 * CharSequenceUtil.padAfter("123", 2, '0');//"23"
+	 * CharSequenceUtil.padAfter("123", -1, '0')//"" 空串
 	 * </pre>
 	 *
 	 * @param str     字符串，如果为{@code null}，直接返回null
@@ -3161,9 +3155,9 @@ public class CharSequenceUtil {
 	 * 补充字符串以满足最小长度
 	 *
 	 * <pre>
-	 * StrUtil.padAfter(null, *, *);//null
-	 * StrUtil.padAfter("1", 3, "ABC");//"1AB"
-	 * StrUtil.padAfter("123", 2, "ABC");//"23"
+	 * CharSequenceUtil.padAfter(null, *, *);//null
+	 * CharSequenceUtil.padAfter("1", 3, "ABC");//"1AB"
+	 * CharSequenceUtil.padAfter("123", 2, "ABC");//"23"
 	 * </pre>
 	 *
 	 * @param str    字符串，如果为{@code null}，直接返回null
@@ -3193,12 +3187,12 @@ public class CharSequenceUtil {
 	 * 居中字符串，两边补充指定字符串，如果指定长度小于字符串，则返回原字符串
 	 *
 	 * <pre>
-	 * StrUtil.center(null, *)   = null
-	 * StrUtil.center("", 4)     = "    "
-	 * StrUtil.center("ab", -1)  = "ab"
-	 * StrUtil.center("ab", 4)   = " ab "
-	 * StrUtil.center("abcd", 2) = "abcd"
-	 * StrUtil.center("a", 4)    = " a  "
+	 * CharSequenceUtil.center(null, *)   = null
+	 * CharSequenceUtil.center("", 4)     = "    "
+	 * CharSequenceUtil.center("ab", -1)  = "ab"
+	 * CharSequenceUtil.center("ab", 4)   = " ab "
+	 * CharSequenceUtil.center("abcd", 2) = "abcd"
+	 * CharSequenceUtil.center("a", 4)    = " a  "
 	 * </pre>
 	 *
 	 * @param str  字符串
@@ -3214,14 +3208,14 @@ public class CharSequenceUtil {
 	 * 居中字符串，两边补充指定字符串，如果指定长度小于字符串，则返回原字符串
 	 *
 	 * <pre>
-	 * StrUtil.center(null, *, *)     = null
-	 * StrUtil.center("", 4, ' ')     = "    "
-	 * StrUtil.center("ab", -1, ' ')  = "ab"
-	 * StrUtil.center("ab", 4, ' ')   = " ab "
-	 * StrUtil.center("abcd", 2, ' ') = "abcd"
-	 * StrUtil.center("a", 4, ' ')    = " a  "
-	 * StrUtil.center("a", 4, 'y')   = "yayy"
-	 * StrUtil.center("abc", 7, ' ')   = "  abc  "
+	 * CharSequenceUtil.center(null, *, *)     = null
+	 * CharSequenceUtil.center("", 4, ' ')     = "    "
+	 * CharSequenceUtil.center("ab", -1, ' ')  = "ab"
+	 * CharSequenceUtil.center("ab", 4, ' ')   = " ab "
+	 * CharSequenceUtil.center("abcd", 2, ' ') = "abcd"
+	 * CharSequenceUtil.center("a", 4, ' ')    = " a  "
+	 * CharSequenceUtil.center("a", 4, 'y')   = "yayy"
+	 * CharSequenceUtil.center("abc", 7, ' ')   = "  abc  "
 	 * </pre>
 	 *
 	 * @param str     字符串
@@ -3248,15 +3242,15 @@ public class CharSequenceUtil {
 	 * 居中字符串，两边补充指定字符串，如果指定长度小于字符串，则返回原字符串
 	 *
 	 * <pre>
-	 * StrUtil.center(null, *, *)     = null
-	 * StrUtil.center("", 4, " ")     = "    "
-	 * StrUtil.center("ab", -1, " ")  = "ab"
-	 * StrUtil.center("ab", 4, " ")   = " ab "
-	 * StrUtil.center("abcd", 2, " ") = "abcd"
-	 * StrUtil.center("a", 4, " ")    = " a  "
-	 * StrUtil.center("a", 4, "yz")   = "yayz"
-	 * StrUtil.center("abc", 7, null) = "  abc  "
-	 * StrUtil.center("abc", 7, "")   = "  abc  "
+	 * CharSequenceUtil.center(null, *, *)     = null
+	 * CharSequenceUtil.center("", 4, " ")     = "    "
+	 * CharSequenceUtil.center("ab", -1, " ")  = "ab"
+	 * CharSequenceUtil.center("ab", 4, " ")   = " ab "
+	 * CharSequenceUtil.center("abcd", 2, " ") = "abcd"
+	 * CharSequenceUtil.center("a", 4, " ")    = " a  "
+	 * CharSequenceUtil.center("a", 4, "yz")   = "yayz"
+	 * CharSequenceUtil.center("abc", 7, null) = "  abc  "
+	 * CharSequenceUtil.center("abc", 7, "")   = "  abc  "
 	 * </pre>
 	 *
 	 * @param str    字符串
@@ -3300,13 +3294,13 @@ public class CharSequenceUtil {
 	 * 参数为 {@code null} 或者 "" 返回 {@code 0}.
 	 *
 	 * <pre>
-	 * StrUtil.count(null, *)       = 0
-	 * StrUtil.count("", *)         = 0
-	 * StrUtil.count("abba", null)  = 0
-	 * StrUtil.count("abba", "")    = 0
-	 * StrUtil.count("abba", "a")   = 2
-	 * StrUtil.count("abba", "ab")  = 1
-	 * StrUtil.count("abba", "xxx") = 0
+	 * CharSequenceUtil.count(null, *)       = 0
+	 * CharSequenceUtil.count("", *)         = 0
+	 * CharSequenceUtil.count("abba", null)  = 0
+	 * CharSequenceUtil.count("abba", "")    = 0
+	 * CharSequenceUtil.count("abba", "a")   = 2
+	 * CharSequenceUtil.count("abba", "ab")  = 1
+	 * CharSequenceUtil.count("abba", "xxx") = 0
 	 * </pre>
 	 *
 	 * @param content      被查找的字符串
@@ -3356,16 +3350,16 @@ public class CharSequenceUtil {
 	 * 比较两个字符串，用于排序
 	 *
 	 * <pre>
-	 * StrUtil.compare(null, null, *)     = 0
-	 * StrUtil.compare(null , "a", true)  &lt; 0
-	 * StrUtil.compare(null , "a", false) &gt; 0
-	 * StrUtil.compare("a", null, true)   &gt; 0
-	 * StrUtil.compare("a", null, false)  &lt; 0
-	 * StrUtil.compare("abc", "abc", *)   = 0
-	 * StrUtil.compare("a", "b", *)       &lt; 0
-	 * StrUtil.compare("b", "a", *)       &gt; 0
-	 * StrUtil.compare("a", "B", *)       &gt; 0
-	 * StrUtil.compare("ab", "abc", *)    &lt; 0
+	 * CharSequenceUtil.compare(null, null, *)     = 0
+	 * CharSequenceUtil.compare(null , "a", true)  &lt; 0
+	 * CharSequenceUtil.compare(null , "a", false) &gt; 0
+	 * CharSequenceUtil.compare("a", null, true)   &gt; 0
+	 * CharSequenceUtil.compare("a", null, false)  &lt; 0
+	 * CharSequenceUtil.compare("abc", "abc", *)   = 0
+	 * CharSequenceUtil.compare("a", "b", *)       &lt; 0
+	 * CharSequenceUtil.compare("b", "a", *)       &gt; 0
+	 * CharSequenceUtil.compare("a", "B", *)       &gt; 0
+	 * CharSequenceUtil.compare("ab", "abc", *)    &lt; 0
 	 * </pre>
 	 *
 	 * @param str1       字符串1
@@ -3390,18 +3384,18 @@ public class CharSequenceUtil {
 	 * 比较两个字符串，用于排序，大小写不敏感
 	 *
 	 * <pre>
-	 * StrUtil.compareIgnoreCase(null, null, *)     = 0
-	 * StrUtil.compareIgnoreCase(null , "a", true)  &lt; 0
-	 * StrUtil.compareIgnoreCase(null , "a", false) &gt; 0
-	 * StrUtil.compareIgnoreCase("a", null, true)   &gt; 0
-	 * StrUtil.compareIgnoreCase("a", null, false)  &lt; 0
-	 * StrUtil.compareIgnoreCase("abc", "abc", *)   = 0
-	 * StrUtil.compareIgnoreCase("abc", "ABC", *)   = 0
-	 * StrUtil.compareIgnoreCase("a", "b", *)       &lt; 0
-	 * StrUtil.compareIgnoreCase("b", "a", *)       &gt; 0
-	 * StrUtil.compareIgnoreCase("a", "B", *)       &lt; 0
-	 * StrUtil.compareIgnoreCase("A", "b", *)       &lt; 0
-	 * StrUtil.compareIgnoreCase("ab", "abc", *)    &lt; 0
+	 * CharSequenceUtil.compareIgnoreCase(null, null, *)     = 0
+	 * CharSequenceUtil.compareIgnoreCase(null , "a", true)  &lt; 0
+	 * CharSequenceUtil.compareIgnoreCase(null , "a", false) &gt; 0
+	 * CharSequenceUtil.compareIgnoreCase("a", null, true)   &gt; 0
+	 * CharSequenceUtil.compareIgnoreCase("a", null, false)  &lt; 0
+	 * CharSequenceUtil.compareIgnoreCase("abc", "abc", *)   = 0
+	 * CharSequenceUtil.compareIgnoreCase("abc", "ABC", *)   = 0
+	 * CharSequenceUtil.compareIgnoreCase("a", "b", *)       &lt; 0
+	 * CharSequenceUtil.compareIgnoreCase("b", "a", *)       &gt; 0
+	 * CharSequenceUtil.compareIgnoreCase("a", "B", *)       &lt; 0
+	 * CharSequenceUtil.compareIgnoreCase("A", "b", *)       &lt; 0
+	 * CharSequenceUtil.compareIgnoreCase("ab", "abc", *)    &lt; 0
 	 * </pre>
 	 *
 	 * @param str1       字符串1
@@ -3427,14 +3421,14 @@ public class CharSequenceUtil {
 	 * null版本排在最小：即：
 	 *
 	 * <pre>
-	 * StrUtil.compareVersion(null, "v1") &lt; 0
-	 * StrUtil.compareVersion("v1", "v1")  = 0
-	 * StrUtil.compareVersion(null, null)   = 0
-	 * StrUtil.compareVersion("v1", null) &gt; 0
-	 * StrUtil.compareVersion("1.0.0", "1.0.2") &lt; 0
-	 * StrUtil.compareVersion("1.0.2", "1.0.2a") &lt; 0
-	 * StrUtil.compareVersion("1.13.0", "1.12.1c") &gt; 0
-	 * StrUtil.compareVersion("V0.0.20170102", "V0.0.20170101") &gt; 0
+	 * CharSequenceUtil.compareVersion(null, "v1") &lt; 0
+	 * CharSequenceUtil.compareVersion("v1", "v1")  = 0
+	 * CharSequenceUtil.compareVersion(null, null)   = 0
+	 * CharSequenceUtil.compareVersion("v1", null) &gt; 0
+	 * CharSequenceUtil.compareVersion("1.0.0", "1.0.2") &lt; 0
+	 * CharSequenceUtil.compareVersion("1.0.2", "1.0.2a") &lt; 0
+	 * CharSequenceUtil.compareVersion("1.13.0", "1.12.1c") &gt; 0
+	 * CharSequenceUtil.compareVersion("V0.0.20170102", "V0.0.20170101") &gt; 0
 	 * </pre>
 	 *
 	 * @param version1 版本1
@@ -3828,13 +3822,13 @@ public class CharSequenceUtil {
 	 * 俗称：脱敏功能，后面其他功能，可以见：DesensitizedUtil(脱敏工具类)
 	 *
 	 * <pre>
-	 * StrUtil.hide(null,*,*)=null
-	 * StrUtil.hide("",0,*)=""
-	 * StrUtil.hide("jackduan@163.com",-1,4)   ****duan@163.com
-	 * StrUtil.hide("jackduan@163.com",2,3)    ja*kduan@163.com
-	 * StrUtil.hide("jackduan@163.com",3,2)    jackduan@163.com
-	 * StrUtil.hide("jackduan@163.com",16,16)  jackduan@163.com
-	 * StrUtil.hide("jackduan@163.com",16,17)  jackduan@163.com
+	 * CharSequenceUtil.hide(null,*,*)=null
+	 * CharSequenceUtil.hide("",0,*)=""
+	 * CharSequenceUtil.hide("jackduan@163.com",-1,4)   ****duan@163.com
+	 * CharSequenceUtil.hide("jackduan@163.com",2,3)    ja*kduan@163.com
+	 * CharSequenceUtil.hide("jackduan@163.com",3,2)    jackduan@163.com
+	 * CharSequenceUtil.hide("jackduan@163.com",16,16)  jackduan@163.com
+	 * CharSequenceUtil.hide("jackduan@163.com",16,17)  jackduan@163.com
 	 * </pre>
 	 *
 	 * @param str          字符串
@@ -3851,16 +3845,16 @@ public class CharSequenceUtil {
 	 * 脱敏，使用默认的脱敏策略
 	 *
 	 * <pre>
-	 * StrUtil.desensitized("100", DesensitizedUtil.DesensitizedType.USER_ID)) =  "0"
-	 * StrUtil.desensitized("段正淳", DesensitizedUtil.DesensitizedType.CHINESE_NAME)) = "段**"
-	 * StrUtil.desensitized("51343620000320711X", DesensitizedUtil.DesensitizedType.ID_CARD)) = "5***************1X"
-	 * StrUtil.desensitized("09157518479", DesensitizedUtil.DesensitizedType.FIXED_PHONE)) = "0915*****79"
-	 * StrUtil.desensitized("18049531999", DesensitizedUtil.DesensitizedType.MOBILE_PHONE)) = "180****1999"
-	 * StrUtil.desensitized("北京市海淀区马连洼街道289号", DesensitizedUtil.DesensitizedType.ADDRESS)) = "北京市海淀区马********"
-	 * StrUtil.desensitized("duandazhi-jack@gmail.com.cn", DesensitizedUtil.DesensitizedType.EMAIL)) = "d*************@gmail.com.cn"
-	 * StrUtil.desensitized("1234567890", DesensitizedUtil.DesensitizedType.PASSWORD)) = "**********"
-	 * StrUtil.desensitized("苏D40000", DesensitizedUtil.DesensitizedType.CAR_LICENSE)) = "苏D4***0"
-	 * StrUtil.desensitized("11011111222233333256", DesensitizedType.BANK_CARD)) = "1101 **** **** **** 3256"
+	 * CharSequenceUtil.desensitized("100", DesensitizedUtil.DesensitizedType.USER_ID)) =  "0"
+	 * CharSequenceUtil.desensitized("段正淳", DesensitizedUtil.DesensitizedType.CHINESE_NAME)) = "段**"
+	 * CharSequenceUtil.desensitized("51343620000320711X", DesensitizedUtil.DesensitizedType.ID_CARD)) = "5***************1X"
+	 * CharSequenceUtil.desensitized("09157518479", DesensitizedUtil.DesensitizedType.FIXED_PHONE)) = "0915*****79"
+	 * CharSequenceUtil.desensitized("18049531999", DesensitizedUtil.DesensitizedType.MOBILE_PHONE)) = "180****1999"
+	 * CharSequenceUtil.desensitized("北京市海淀区马连洼街道289号", DesensitizedUtil.DesensitizedType.ADDRESS)) = "北京市海淀区马********"
+	 * CharSequenceUtil.desensitized("duandazhi-jack@gmail.com.cn", DesensitizedUtil.DesensitizedType.EMAIL)) = "d*************@gmail.com.cn"
+	 * CharSequenceUtil.desensitized("1234567890", DesensitizedUtil.DesensitizedType.PASSWORD)) = "**********"
+	 * CharSequenceUtil.desensitized("苏D40000", DesensitizedUtil.DesensitizedType.CAR_LICENSE)) = "苏D4***0"
+	 * CharSequenceUtil.desensitized("11011111222233333256", DesensitizedType.BANK_CARD)) = "1101 **** **** **** 3256"
 	 * </pre>
 	 *
 	 * @param str              字符串
@@ -4005,7 +3999,7 @@ public class CharSequenceUtil {
 	 */
 	@SuppressWarnings("unchecked")
 	public static <T extends CharSequence> T firstNonEmpty(T... strs) {
-		return ArrayUtil.firstMatch(StrUtil::isNotEmpty, strs);
+		return ArrayUtil.firstMatch(CharSequenceUtil::isNotEmpty, strs);
 	}
 
 	/**
@@ -4019,7 +4013,7 @@ public class CharSequenceUtil {
 	 */
 	@SuppressWarnings("unchecked")
 	public static <T extends CharSequence> T firstNonBlank(T... strs) {
-		return ArrayUtil.firstMatch(StrUtil::isNotBlank, strs);
+		return ArrayUtil.firstMatch(CharSequenceUtil::isNotBlank, strs);
 	}
 
 	// ------------------------------------------------------------------------ lower and upper
@@ -4161,9 +4155,9 @@ public class CharSequenceUtil {
 	 * 切换给定字符串中的大小写。大写转小写，小写转大写。
 	 *
 	 * <pre>
-	 * StrUtil.swapCase(null)                 = null
-	 * StrUtil.swapCase("")                   = ""
-	 * StrUtil.swapCase("The dog has a BONE") = "tHE DOG HAS A bone"
+	 * CharSequenceUtil.swapCase(null)                 = null
+	 * CharSequenceUtil.swapCase("")                   = ""
+	 * CharSequenceUtil.swapCase("The dog has a BONE") = "tHE DOG HAS A bone"
 	 * </pre>
 	 *
 	 * @param str 字符串
@@ -4257,7 +4251,7 @@ public class CharSequenceUtil {
 	 * @return 是否包围，空串不包围
 	 */
 	public static boolean isSurround(CharSequence str, CharSequence prefix, CharSequence suffix) {
-		if (StrUtil.isBlank(str)) {
+		if (CharSequenceUtil.isBlank(str)) {
 			return false;
 		}
 		if (str.length() < (prefix.length() + suffix.length())) {
@@ -4277,7 +4271,7 @@ public class CharSequenceUtil {
 	 * @return 是否包围，空串不包围
 	 */
 	public static boolean isSurround(CharSequence str, char prefix, char suffix) {
-		if (StrUtil.isBlank(str)) {
+		if (CharSequenceUtil.isBlank(str)) {
 			return false;
 		}
 		if (str.length() < 2) {
@@ -4462,7 +4456,7 @@ public class CharSequenceUtil {
 	 * @since 3.2.3
 	 */
 	public static boolean isAllCharMatch(CharSequence value, Matcher<Character> matcher) {
-		if (StrUtil.isBlank(value)) {
+		if (CharSequenceUtil.isBlank(value)) {
 			return false;
 		}
 		for (int i = value.length(); --i >= 0; ) {