问空格分隔字符串所需的正则表达式

EN

Pattern.compile("^\\p{Lu}\\S*\\s+\\p{Lu}")

Pattern.compile("^\\p{Lu}\\S*\\s+\\p{Lu}.*", Pattern.DOTALL)

^(?:[A-Z]+_[A-Z]+_\d+\s*)+

^           - Match the beginning of the string
(?:         - Start a non-capturing group (used to repeat the following)
    [A-Z]+  - Match one or more uppercase characters
    _       - Match an underscore
    [A-Z]+  - Match one or more uppercase characters
    _       - Match an underscore
    \d+     - Match one or more decimals (0-9)
    \s*     - Match zero or more space characters
)+          - Repeat the above group one or more times

Pattern pattern = Pattern.compile("^(?:[A-Z]+_[A-Z]+_\\d+\\s*)+");
Matcher matcher = p.matcher( inputString);
if( matcher.matches()) {
    System.out.println( "Match found.");
}