按照列表中的某個欄位的屬性進行排序
java開發中時常遇到排序的問題。尤其是遇到針對某個bo,po之類的實體bean屬性的值進行排序是就要使用Collections這個工具類,就顯得格外方便。
/**
* @decription:對列表進行排序
* @param args
*/
public static void main(String[] args) {
List<WaterMamBgalarminfo> listForCompare = new ArrayList<WaterMamBgalarminfo>();
WaterMamBgalarminfo po1 = new WaterMamBgalarminfo();
WaterMamBgalarminfo po2 = new WaterMamBgalarminfo();
WaterMamBgalarminfo po3 = new WaterMamBgalarminfo();
WaterMamBgalarminfo po4 = new WaterMamBgalarminfo();
po1.setQkalarminfoid(new Integer(6));
po2.setQkalarminfoid(new Integer(4));
po3.setQkalarminfoid(new Integer(5));
po4.setQkalarminfoid(new Integer(7));
listForCompare.add(po1);
listForCompare.add(po2);
listForCompare.add(po3);
listForCompare.add(po4);
comPare(listForCompare);
for(WaterMamBgalarminfo po:listForCompare){
System.out.println(po.getQkalarminfoid());
}
}
static void comPare(List list){
Collections.sort(list, new Comparator<WaterMamBgalarminfo>() {
@Override
public int compare(WaterMamBgalarminfo o1, WaterMamBgalarminfo o2) {
return o1.getQkalarminfoid()-o2.getQkalarminfoid();
}
});
}
}