StringUtil (common util 1.0.7-RELEASE API)

```
public class StringUtil
extends Object
```
字符集问题 1.不存在使用一个字符集转成成另一个字符集的问题，因为String底层使用char[]存储,只在需要操作byte[]时，转换字节有关

Nested Classes
Modifier and Type	Class and Description
`static class`	`StringUtil.StringPart`

Constructors
Constructor and Description
`StringUtil()`

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static boolean`	`containsWhitespace(CharSequence str)`
`static byte`	`countUTF8CharBytes(byte b)`
`static String`	`emojiToUnicode(String src)` 将emoji字符转成Unicode
`static boolean`	`hasLength(CharSequence str)`
`static boolean`	`hasLength(String str)`
`static boolean`	`hasText(CharSequence str)`
`static boolean`	`hasText(String str)`
`static boolean`	`isAllNumeric(String str)`
`static boolean`	`isEmojiCharacter(int codePoint)` 判断是否包含Emoji符号
`static boolean`	`isEmpty(String str)`
`static StringUtil.StringPart`	`partUTF8String(String src)`
`static String`	`removeEmoji(String src)`
`static String`	`replace(String inString, String oldPattern, String newPattern)`
`static String`	`unicodeToEmoji(String src)` 将Unicode字符转成emoji

public static boolean isEmpty(String str)

public static boolean isAllNumeric(String str)

public static boolean hasLength(CharSequence str)

public static boolean hasLength(String str)

public static boolean hasText(CharSequence str)

public static boolean hasText(String str)

public static boolean containsWhitespace(CharSequence str)

public static String replace(String inString,
                             String oldPattern,
                             String newPattern)

public static String removeEmoji(String src)

public static byte countUTF8CharBytes(byte b)

public static StringUtil.StringPart partUTF8String(String src)

Class StringUtil