List 自定义排序

package com.haoren168;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import java.util.List;/** * 自定义比较：MyComparator * @author Administrator * */public class MyComparator implements Comparator {/** * 实现compare */public int compare(Object o1, Object o2) {Person p1 = (Person) o1;Person p2 = (Person) o2;// 3个属性的比较int flag1 = p1.getName().compareTo(p2.getName());int flag2 = p1.getHigh().compareTo(p2.getHigh());int flag3 = p1.getEye().compareTo(p2.getEye());// 第一个相等，比较第二个if (flag1 == 0) {// 第二个相等，比较第三个if (flag2 == 0) {return flag3;} else {return flag2;}} else {return flag1;}}/** * 测试的main方法 * @param args */@SuppressWarnings("unchecked")public static void main(String[] args) {Person p1 = new Person("a1", "dd2", "xx1");Person p2 = new Person("a3", "dd1", "xx1");Person p3 = new Person("a2", "dd2", "xx1");Person p4 = new Person("a2", "dd1", "xx2");Person p5 = new Person("a2", "dd3", "xx1");Person p6 = new Person("a2", "dd1", "xx0");MyComparator my = new MyComparator();List<Person> personList = new ArrayList<Person>();personList.add(p1);personList.add(p2);personList.add(p3);personList.add(p4);personList.add(p5);personList.add(p6); Collections.sort(personList, my);for (Person p : personList) {System.out.println(p.getName()+"/" +p.getHigh()+"/" + p.getEye());}}}/** * Person 类 * @author Administrator * */class Person {private String name;private String high;private String eye;public Person(String name, String high, String eye) {this.eye = eye;this.name = name;this.high = high;}public String getEye() {return eye;}public void setEye(String eye) {this.eye = eye;}public String getHigh() {return high;}public void setHigh(String high) {this.high = high;}public String getName() {return name;}public void setName(String name) {this.name = name;}}  

 

结果：

a1/dd2/xx1
a2/dd1/xx0
a2/dd1/xx2
a2/dd2/xx1
a2/dd3/xx1
a3/dd1/xx1