BeanComparator实现ArrayList复合排序
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- package test;
-
- import java.util.Collections;
- import java.util.Comparator;
- import java.util.ArrayList;
- 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;
-
- public static void main(String []args) {
- ArrayList<Object> list = new ArrayList<Object>();
- list.add(new CompareTipA(1,"3","五"));
- list.add(new CompareTipA(1,"1","六"));
- list.add(new CompareTipA(1,"5","二"));
- list.add(new CompareTipA(1,"4","四"));
- list.add(new CompareTipA(4,"2","一"));
-
- Comparator mycmp = ComparableComparator.getInstance();
- mycmp = ComparatorUtils.nullLowComparator(mycmp);
- mycmp = ComparatorUtils.reversedComparator(mycmp);
-
- ArrayList<Object> sortFields = new ArrayList<Object>();
- sortFields.add(new BeanComparator("id", mycmp));
- sortFields.add(new BeanComparator("name"));
-
- ComparatorChain multiSort = new ComparatorChain(sortFields);
- Collections.sort(list,multiSort);
-
- for (int i =0;i<list.size();i++) {
- System.out.println(list.get(i));
- }
- }
-
- public CompareTipA(int id, String name,String age) {
- this.id = id;
- this.name = name;
- this.age = age;
- }
-
- public int getId() {
- return this.id;
- }
-
- public void setId(int id) {
- this.id = id;
- }
-
- public String getName() {
- return this.name;
- }
-
- public void setName(String name) {
- this.name = name;
- }
-
- public String toString() {
- return "[id=" + this.id + ",name=" + this.name +",age=" + this.age +"]";
- }
-
- public String getAge() {
- return age;
- }
-
- public void setAge(String age) {
- this.age = age;
- }
- }