一、定義Person類模型

package cn.lesson8.statary;public class Person {private int id;private String name;private int age;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}@Overridepublic String toString() {return "Person [id=" + id + ", name=" + name + ", age=" + age + "]";}}

二、定義接口SortInterface

package cn.lesson8.statary;import java.util.List;public interface SortInterface {public void sort(List<Person> list); }

三、實現接口的具體方法UpNameSort

該方法繼承了Comparator接口，實現自定義排序規則。 package cn.lesson8.statary;import java.util.Collections; import java.util.Comparator; import java.util.List;public class UpNameSort implements SortInterface,Comparator<Person>{@Overridepublic int compare(Person o1, Person o2) {int result=o1.getName().compareTo(o2.getName());if(0==result){return o1.getId()-o2.getId(); //如果名字相等，按Id排序}return result;}@Overridepublic void sort(List<Person> list) {Collections.sort(list, this); //安裝自定義排序規則進行排序，this代表當前的排序規則}}

四、調用環境類Environment

package cn.lesson8.statary;import java.util.List;public class Environment {private SortInterface sortInterface;public Environment(SortInterface sortInterface){this.sortInterface=sortInterface;}public Environment(){}public void setSortInterface(SortInterface sortInterface) {this.sortInterface = sortInterface;}public void sort(List<Person> list){this.sortInterface.sort(list); //this代表當前對象調用sortInterface對象的sort（）方法} }

五、測試類Client

package cn.lesson8.statary;import java.util.ArrayList; import java.util.List;public class Client {public static void main(String[] args){Person p1 = new Person();p1.setName("Tom");p1.setId(1);p1.setAge(20);Person p2 = new Person();p2.setName("Tonny");p2.setId(2);p2.setAge(50);Person p3 = new Person();p3.setName("Tom");p3.setId(5);p3.setAge(30);Person p4 = new Person();p4.setName("ABC");p4.setId(8);p4.setAge(10);Person p5 = new Person();p5.setName("Xyz");p5.setId(9);p5.setAge(15);List<Person> list = new ArrayList<Person>();list.add(p1);list.add(p2);list.add(p3);list.add(p4);list.add(p5);Environment env=new Environment();UpNameSort uns=new UpNameSort();env.setSortInterface(uns);env.sort(list);for(int i=0;i<list.size();i++){Person p=list.get(i);System.out.println(p.toString());}} }

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轉載于:https://www.cnblogs.com/james1207/p/3266559.html

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