java 多字段排序

	/**
	 * Sort List by multiple conditions.

	 * It's like SQL 'Order by' clause. Input multiple Comparator
	 * in List as argument.
	 * 
	 * @param 
	 * @param list
	 * @param comparatorList
	 * @throws IllegalArgumentException if comparatorList is empty
	 * @author shengyuan.lu 卢声远
	 */
	public static  void sort(List list, final List> comparatorList) {
        if (comparatorList.isEmpty()) {//Always equals, if no Comparator.
             throw new IllegalArgumentException("comparatorList is empty.");
        }
        Comparator comparator = new Comparator() {
        public int compare(T o1, T o2) {
                for (Comparator c:comparatorList) {
                    if (c.compare(o1, o2) > 0) {
                      return 1;
                    } else if (c.compare(o1, o2) < 0) {
                      return -1;
                    }
                }
                return 0;
          }
        };
        Collections.sort(list, comparator);
   }

 

 public void sortByMethod(List list, final String method,
            final boolean reverseFlag) {
        Collections.sort(list, new Comparator