java中对List中对象排序实现

package com.test;



import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;







public class NewsManager {



	/**

	 * @param args

	 */

	public static void main(String[] args) {



		List newss=getNewsList();

		

		for(int i=0;i<newss.size();i++)

		{

			News news=(News)newss.get(i);

			

			System.out.println("id:"+news.getId());

			System.out.println("title:"+news.getTitle());

			System.out.println("hits:"+news.getHits());

			

		}



	}

	

	

	public static List getNewsList()

	{

		

		List list=new ArrayList();

		

		News news1=new News();

		news1.setHits(1);

		news1.setId(1);

		news1.setTitle("test1");

		list.add(news1);

		

		News news2=new News();

		news2.setHits(7);

		news2.setId(2);

		news2.setTitle("test2");

		list.add(news2);

		

		News news3=new News();

		news3.setHits(3);

		news3.setId(3);

		news3.setTitle("test3");

		list.add(news3);

		

		News news4=new News();

		news4.setHits(5);

		news4.setId(4);

		news4.setTitle("test4");

		list.add(news4);

		

		

		// 按点击数倒序

		Collections.sort(list, new Comparator<News>() {

			public int compare(News arg0, News arg1) {

				int hits0 = arg0.getHits();

				int hits1 = arg1.getHits();

				if (hits1 > hits0) {

					return 1;

				} else if (hits1 == hits0) {

					return 0;

				} else {

					return -1;

				}

			}

		});

		

		return list;

	}



}