import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.Comparator; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; import java.util.TreeSet;
public class JavaUtil {
public static List filterList(List list,String... args){
//如果沒有資料，無需去重
if (null == list || list.isEmpty()){
return new ArrayList();
}
//set集合去重複
Set set = new TreeSet(new Comparator() {
@SuppressWarnings({ "unchecked", "rawtypes" })
public int compare(T o1, T o2) {
Class clazz1 = o1.getClass();
Class clazz2 = o2.getClass();
Method mv1;
Method mv2;
try {
//比較參數的個數
//int size = args.length;
int result = 0;
for (String gets : args){
mv1 = clazz1.getDeclaredMethod(gets);
mv2 = clazz2.getDeclaredMethod(gets);
String argVal = null == mv1.invoke(o1) ? "" : mv1.invoke(o1) + "";
String argVa2 = null == mv2.invoke(o2) ? "" : mv2.invoke(o2) + "";
result = argVal.compareTo(argVa2);
if (result != 0){
break;
}
}
return result;
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
return 0;
}
});
set.addAll(list);
return new ArrayList(set);
}
}