不区分大小写进行替换

/** *不区分大小写进行替换 */public class Test {/** * @param args */public static void main(String[] args) {test_replaceAll();}public static void test_replaceAll(){String input = "Hello World!";String input2 = "HELLO WORLD!" ;String inputStr = "REPLAce";String replacement="china";System.out.println(input);System.out.println(input.replaceAll("(?i)world", replacement));System.out.println(input2.replaceAll("(?i)world", replacement));System.out.println(inputStr.replaceAll("(?i)replace", "Replace"));}}