List的排序

package test;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Test3 {

	/*
	 * List<Map>的排序
	 */
	public static void main(String[] args) {
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
		for(int i=10; i>=0; i--) {
			Map<String, Object> map = new HashMap<String, Object>();
			map.put("key", i);
			list.add(map);
		}
		System.out.println(list);
		Comparator<Map<String, Object>> comp = new Comparator<Map<String, Object>>() {
			public int compare(Map<String, Object> o1, Map<String, Object> o2) {
				return o1.get("key").toString().compareTo(o2.get("key").toString());
			}
		};
		Collections.sort(list, comp);
		System.out.println(list);
	}
}