記錄-Java8中的字符串轉數組再通過指定符號拼接

1.字符串轉換字符串數組

String[] nameArr = StringUtils.tokenizeToStringArray(nameAttr, MULTI_VALUE_ATTRIBUTE_DELIMITERS);  // nameAttr="made,in;china,;qqq,.aaa" ,MULTI_VALUE_ATTRIBUTE_DELIMITERS=",;."

將字符串按照指定的字符轉換成String[]數組，如字符串中不包含指定字符，則將整個字符串放進數組。如指定字符有多個，是分別按所有可能出現的字符來切割的。 字符串： "made,in;china,;qqq,.aaa"     指定字符： ",;."       返回數組：[made, in, china, qqq, aaa]

/**
 * Tokenize the given {@code String} into a {@code String} array via a
 * {@link StringTokenizer}.
 * <p>Trims tokens and omits empty tokens.
 * <p>The given {@code delimiters} string can consist of any number of
 * delimiter characters. Each of those characters can be used to separate
 * tokens. A delimiter is always a single character; for multi-character
 * delimiters, consider using {@link #delimitedListToStringArray}.
 * @param str the {@code String} to tokenize (potentially {@code null} or empty)
 * @param delimiters the delimiter characters, assembled as a {@code String}
 * (each of the characters is individually considered as a delimiter)
 * @return an array of the tokens
 * @see java.util.StringTokenizer
 * @see String#trim()
 * @see #delimitedListToStringArray
 */
public static String[] tokenizeToStringArray(@Nullable String str, String delimiters) {
    return tokenizeToStringArray(str, delimiters, true, true);
}

 2.字符串數組通過某符號連接

　　Collectors.joining 收集器 支持靈活的參數配置，可以指定字符串連接時的 分隔符，前綴 和 后綴 字符串

Stream<String> stream = Arrays.stream(nameArr);

String result = stream.collect(Collectors.joining("/", "[", "]"));
System.out.println(result);
// 輸出字符串 [made/in/china]