用split将字符串分割并输出

        String str1 = "aaa,bbb,ccc";
        String[] array1 = str1.split(",");
        for(int i = 0; i< array1.length; i++){
            System.out.println(array1[i]);
            //aaa
            //bbb
            //ccc

String[] array1 = str1.split("\\.");

如果想用"."切分，必须这样写在括号内