java arraylist 倒叙问题

import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;

import org.apache.commons.lang3.StringUtils;
import org.junit.Test;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;


@ContextConfiguration(locations = { "classpath*:conf/spring/*.xml" })
public class TestresiveTest extends AbstractJUnit4SpringContextTests {
public Object getBean(String beanName) {
Object object = applicationContext.getBean(beanName);
return object;
}

@Test
public void addUser() {
Resive r=new Resive();
r.setParentUnitid("110102030405");
ArrayList<Resive> ln=new ArrayList<Resive>();
ArrayList<Resive> ls=addresvic(ln,r);
System.out.println(ls.size());
for (Resive resive : ls) {
System.out.println("=="+resive.getName());
}
Collections.reverse(ls);
System.out.println("111111111111==========================");
for (Resive resive : ls) {
System.out.println("=="+resive.getName());
}
}
  
public ArrayList<Resive>  addresvic(ArrayList<Resive> ln,Resive r){

ResiveService resiveService = (ResiveService) getBean("resiveService");
Resive rr=resiveService.findResiveby(r.getParentUnitid());
if(StringUtils.isNotEmpty(rr.getParentUnitid())){
ln.add(rr);
System.out.println(ln.size());
addresvic(ln,rr);
}else{
ln.add(rr);
return ln;
}

return ln;
}

public static void main(String[] args) {
         List<Integer> list = new ArrayList<Integer>();// 创建列表
         for (int i = 0; i < 10; i++) {// 向列表中增加10个元素
             list.add(i);
         }
         Iterator it = list.iterator();
         System.out.print("ArrayList集合中的元素为：");
         while(it.hasNext()){
             System.out.print(it.next()+" ");
         }     
         System.out.println();
         System.out.println("逆序后为：");
         ListIterator<Integer> li = list.listIterator();// 获得ListIterator对象
         for (li = list.listIterator(); li.hasNext();) {// 将游标定位到列表结尾
             li.next();
         }
         for (; li.hasPrevious();) {// 逆序输出列表中的元素
             System.out.print(li.previous() + " ");
         }
     }
}