将一维数组转二维数组

public static String[][] arrayPaging(String[] arr,int pageSize){

        String[][] arrs = new String[arr.length % pageSize == 0 ? arr.length/pageSize : arr.length/pageSize+1][pageSize];

        for (int i = 0; i < arr.length; i++) {
            arrs[i / pageSize][i % pageSize] = arr[i];
        }

        return arrs;
}