import java.lang.reflect.Field;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class SortData {
    public List<?> sortByInt(List<?> list, final String param ){
        //自定義Comparator物件，自定義排序  
        Comparator c = new Comparator() {  
            @Override
 
  
            public int compare(Object o1, Object o2) {  
                try {
                    Field  field1 = o1.getClass().getDeclaredField(param);
                    Field  field2 = o2.getClass().getDeclaredField(param);
                    field1.setAccessible(true);
                    field2.setAccessible(true
 
);
                    if((Integer)field1.get(o1)<(Integer)field2.get(o2))  
                        return 1;  
                    //注意！！返回值必須是一對相反數，否則無效。jdk1.7以後就是這樣。  
                    else return -1;  
                } catch (Exception e) {
                    e.printStackTrace();
                } 
           return
 
 1;
        }
        };
        Collections.sort(list, c);
        return list;
    }
}