java 占位符

    @Test
    void contextLoads() {
        String s1 = "你好{0}， 我叫{1}";
        System.out.println(MessageFormat.format(s1, "张飞", "王菲"));

        String s2 = "你好%s， 我叫%s";
        System.out.println(String.format(s2, "张1飞", "王1菲"));
    }