FIX #1105 : add '@' in CharUtil and StrUtil.

hutool-core/src/main/java/cn/hutool/core/util/CharUtil.java

@@ -29,6 +29,7 @@ public class CharUtil {
 	public static final char DOUBLE_QUOTES = '"';
 	public static final char SINGLE_QUOTE = '\'';
 	public static final char AMP = '&';
+	public static final char AT = '@';
 
 	/**
 	 * 是否为ASCII字符，ASCII字符位于0~127之间

hutool-core/src/main/java/cn/hutool/core/util/StrUtil.java

@@ -48,6 +48,7 @@ public class StrUtil {
 	public static final char C_BRACKET_START = CharUtil.BRACKET_START;
 	public static final char C_BRACKET_END = CharUtil.BRACKET_END;
 	public static final char C_COLON = CharUtil.COLON;
+	public static final char C_AT = CharUtil.AT;
 
 	public static final String SPACE = " ";
 	public static final String TAB = "	";
@@ -68,6 +69,7 @@ public class StrUtil {
 	public static final String BRACKET_START = "[";
 	public static final String BRACKET_END = "]";
 	public static final String COLON = ":";
+	public static final String AT = "@";
 
 	public static final String HTML_NBSP = " ";
 	public static final String HTML_AMP = "&";