Java 把数组变成字符串

public class Main {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3};
        System.out.println(arrToSting(arr));
    }
	//定义把数组转换为字符串的方法
    public static String arrToSting(int[] arr) {
        StringBuilder sb = new StringBuilder();
        sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            sb.append(arr[i]);
            if (i != arr.length - 1) {
                sb.append(",");
                sb.append(" ");
            }
        }
        sb.append("]");
        return sb.toString();
    }
}