List通用排序

//通用排序
public class SortList<E> {
	public void Sort(List<E> list, final String method, final String sort) {
		Collections.sort(list, new Comparator() {
			public int compare(Object a, Object b) {
				int ret = 0;
				try {
					Method m1 = ((E) a).getClass().getMethod(method, null);
					Method m2 = ((E) b).getClass().getMethod(method, null);
					if (sort != null && "desc".equals(sort))// 倒序
						ret = m2.invoke(((E) b), null).toString().compareTo(
								m1.invoke(((E) a), null).toString());
					else
						// 正序
						ret = m1.invoke(((E) a), null).toString().compareTo(
								m2.invoke(((E) b), null).toString());
				} catch (NoSuchMethodException ne) {
					System.out.println(ne);
				} catch (IllegalAccessException ie) {
					System.out.println(ie);
				} catch (InvocationTargetException it) {
					System.out.println(it);
				}
				return ret;
			}
		});
	}
}

調用：

SortList<TbNews> sortList = new SortList<TbNews>();
// 排序 list爲集合，getNdate根據哪個字段排序，desc排序方式
sortList.Sort(list, "getNdate", "desc");