转自 @author chenchuang
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
/**
* List对象排序的通用方法
*
* @author chenchuang
*
* @param <E>
*/
public class ListSort<E> {
/**
*
* @param list 要排序的集合
* @param method 要排序的实体的属性所对应的get方法
* @param sort desc 为正序
*/
public void Sort(List<E> list, final String method, final String sort) {
// 用内部类实现排序
Collections.sort(list, new Comparator<E>() {
public int compare(E a, E b) {
int ret = 0;
try {
// 获取m1的方法名
Method m1 = a.getClass().getMethod(method, null);
// 获取m2的方法名
Method m2 = b.getClass().getMethod(method, null);
if (sort != null && "desc".equals(sort)) {
ret = Double.valueOf(m2.invoke(((E) b), null).toString()).compareTo(Double.valueOf((m1.invoke(((E) a), null).toString())));
} else {
// 正序排序
ret = Double.valueOf(m1.invoke(((E) a), null).toString()).compareTo(Double.valueOf((m2.invoke(((E) b), null).toString())));
}
} catch (NoSuchMethodException ne) {
System.out.println(ne);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return ret;
}
});
}
}