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

import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.ComparatorUtils;
import org.apache.commons.collections.comparators.ComparableComparator;
import org.apache.commons.collections.comparators.ComparatorChain;

public class SortUtil {
	public static void main(String[] args) {
		System.out.println(testMapSort());
	}
	
	/**
	 * 对list进行排序
	 * @param sortList 需要排序的list
	 * @param param1   排序的参数名称
	 * @param orderType 排序类型：正序-asc；倒序-desc  
	 */
	public static List sort(List sortList, String param1, String orderType){
		Comparator mycmp1 = ComparableComparator.getInstance ();
		if("desc".equals(orderType)){
			mycmp1 = ComparatorUtils. reversedComparator(mycmp1); //逆序（默认为正序）
		}
		
		ArrayList<Object> sortFields = new ArrayList<Object>();
		sortFields.add( new BeanComparator(param1 , mycmp1)); //主排序（第一排序）

		ComparatorChain multiSort = new ComparatorChain(sortFields);
		Collections.sort (sortList , multiSort);
		
		return sortList;
	}
	
	/**
	 * 对list进行排序
	 * @param sortList 需要排序的list
	 * @param param1   排序的参数名称:参数长度
	 * @param param2   排序的参数名称:排序参数
	 * @param orderType 排序类型：正序-asc；倒序-desc  
	 */
	public static List sortParam2(List sortList, String param1,String param2, String orderType){
		Comparator mycmp1 = ComparableComparator.getInstance ();
		Comparator mycmp2 = ComparableComparator.getInstance ();
		if("desc".equals(orderType)){
			mycmp1 = ComparatorUtils. reversedComparator(mycmp1); //逆序（默认为正序）
		}
		
		ArrayList<Object> sortFields = new ArrayList<Object>();
		sortFields.add( new BeanComparator(param1 , mycmp1)); //主排序（第一排序）
		sortFields.add( new BeanComparator(param2 , mycmp2)); //主排序（第一排序）

		ComparatorChain multiSort = new ComparatorChain(sortFields);
		Collections.sort (sortList , multiSort);
		
		return sortList;
	}
	
	public static List testMapSort(){
		List sortList = new ArrayList();
		
		Map map = new HashMap();
		map.put("name", "1");
		map.put("age", "1");
		
		Map map2 = new HashMap();
		map2.put("name", "3");
		map2.put("age", "13");
		
		Map map1 = new HashMap();
		map1.put("name", "3");
		map1.put("age", "12");
		
		List list = new ArrayList();
		list.add(map);
		list.add(map1);
		list.add(map2);
		
		//return sort(list, "age", "asc");
		return sortParam2(list, "name", "age", "asc");
	}
	
}