Java 字符串按照指定长度 分割--添加到list列表

import java.util.ArrayList;
import java.util.List;

public class JsonTest {

public static void main(String[] args) {

    String str = "1234567890124564698797946532132132132156";
    stringToList(str,7);

}

public static void stringToList(String str,int length){
    List list = new ArrayList();
    //按照该长度进行字符串的分割
    //将输入的字符串分割为几份
    int size = str.length()/length+1;
    System.out.println(size);
    for (int i = 0; i < size; i++) {
            if (i==size-1){
                String substring = str.substring(i * length, str.length());
                list.add(substring);
            }else {
                String substring = str.substring(i * length, (i + 1) * length);
                list.add(substring);
            }
    }
    System.out.println(list);
}

}