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Java中对象按照属性排序

2014-11-24 09:17:08 · 作者: · 浏览: 0
标签: Java 对象 按照 属性 排序
项目中经常需要用到比如地区列表按照中文的拼音首字母排序，但是有时候获取到的地区列表是对象的形式，有地区id，地区名称两个属性。这里主要涉及到两个技术点：
1、对象按属性排序；2、中文按拼音首字母排序。下面给出自己整理好的demo： 
import java.text.Collator;  
import java.util.ArrayList;  
import java.util.Collections;  
import java.util.Comparator;  
  
import org.apache.commons.beanutils.BeanComparator;  
import org.apache.commons.collections.ComparatorUtils;  
import org.apache.commons.collections.comparators.ComparableComparator;  
import org.apache.commons.collections.comparators.ComparatorChain;  
  
public class CompareTipA  {  
    private int  id;  
    private String  name;  
    private String age;  
  
    @SuppressWarnings("unchecked")  
    public static void main(String []args) {  
        ArrayList list = new ArrayList();  
        list.add(new CompareTipA(1,"3","五"));  
        list.add(new CompareTipA(2,"1","六"));  
        list.add(new CompareTipA(5,"5","二"));  
        list.add(new CompareTipA(3,"4","四"));  
        list.add(new CompareTipA(8,"4","四"));  
        list.add(new CompareTipA(4,"2","一"));  
  
        Comparator mycmp = ComparableComparator.getInstance();  
        mycmp = ComparatorUtils.nullLowComparator(mycmp);  //允许null     
        mycmp = ComparatorUtils.reversedComparator(mycmp); //逆序     
          
        ArrayList sortFields = new ArrayList();  
        Comparator comparator=Collator.getInstance(java.util.Locale.CHINA);  
  
        sortFields.add(new BeanComparator("name",comparator));  //name正序 (主)  
        sortFields.add(new BeanComparator("id", mycmp));     //id逆序  (副)  
        ComparatorChain multiSort = new ComparatorChain(sortFields);  
        Collections.sort(list,multiSort);  
          
        for (int i =0;i






 
  
 
 
  
 

  注意：需要导入的三个包：commons-beanutils-1.8.3.jar     commons-collections-3.2.1.jar       commons-logging-1.1.3.jar
 
 
 

  commons-collections包不能用官网上的4.0版本，因为从
  源码中可以看见commons-beanutils包调用的就是commons-collections3.2版本的api，4.0的没兼容；commons-logging包也是commons-beanutils包所需要的。