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字串處理,替換忽略大小寫,空格

 public static void main(String[] args) {
	String aa = "qwzhongqianQwhahaQWhahaqwhahQW";
	String bb = "a   aa    aaaa      bbbb       ccccc                  ddd        ";
	System.out.println(aa.replaceAll("(?i)qw", "&"));
	String[] strArray = bb.split("\\s++");
	for (String s: strArray) {
		System.out.println(s);
	}


執行結果: