Java实验项目三——职工类对象数组按照职工生日排序

Program：

修改项目三（1）中的第3题，实现比较方法，将对象数组的数据按照生日的大小给职工排序。

Description：令日期类MyDate和员工类Worker类实现接口Comparable，并实现方法compareTo()

代码如下：

MyDate类：

 1 /*
 2  * Description:定义日期时间类,实现Comparable接口
 3  *
 4  * Written By:Cai
 5  *
 6  * Date Written:2017-10-18
 7  *
 8  *
 9  * */
10
11 package entity;
12
13
14 public class MyDate implements Comparable<MyDate> {
15
16     private String year;    //年
17     private String month;   //月
18     private String day;     //日
19
20
21     public MyDate() {
22
23     }
24
25     public MyDate(String year,String month,String day) {
26
27         this.year = year;
28         this.month = month;
29         this.day = day;
30     }
31
32
33     //定义setter和getter方法
34     public String getYear() {
35         return year;
36     }
37
38     public void setYear(String year) {
39         this.year = year;
40     }
41
42     public String getMonth() {
43         return month;
44     }
45
46     public void setMonth(String month) {
47         this.month = month;
48     }
49
50     public String getDay() {
51         return day;
52     }
53
54     public void setDay(String day) {
55         this.day = day;
56     }
57
58     //覆写toString()方法
59     public String toString() {
60         return this.year + "年" + this.month + "月" + this.day + "日";
61     }
62
63
64     //实现Comparable接口的compareTo()方法
65     @Override
66     public int compareTo(MyDate temp) {
67
68         //将对象的日期连接成时间戳一起比较
69         String str1 = this.year + this.month + this.day;
70         String str2 = temp.getYear() + temp.getMonth() + temp.getDay();
71
72         //直接调用String类的compareTo()方法，按字符串从小到大排序
73         return str1.compareTo(str2);
74     }
75
76 }

Worker类：

  1 /*
  2  * Description:定义职工类，实现Comparable接口
  3  *
  4  * Written By:Cai
  5  *
  6  * Date Written:2017-10-18
  7  *
  8  *
  9  * */
 10
 11 package entity;
 12
 13 import entity.MyDate;
 14
 15 public class Worker implements Comparable<Worker> {
 16
 17     String workerId;        　　//职工号
 18     String workerName;         //职工姓名
 19     String workerSex;          //职工性别
 20     String workerPartment;     //职工部门
 21     MyDate workerBirthday;     //职工生日
 22     MyDate workerBeginDate;    //职工开始工作时间
 23
 24
 25     //定义构造方法
 26     public Worker() {
 27
 28     }
 29
 30     public Worker(String id,String name,String sex,String partment,MyDate birthday,MyDate beginDate) {
 31
 32         this.workerId = id;
 33         this.workerName = name;
 34         this.workerSex = sex;
 35         this.workerPartment = partment;
 36         this.workerBirthday = birthday;
 37         this.workerBeginDate = beginDate;
 38     }
 39
 40
 41     //定义setter和getter方法
 42     public String getWorkerId() {
 43         return workerId;
 44     }
 45
 46     public void setWorkerId(String workerId) {
 47         this.workerId = workerId;
 48     }
 49
 50     public String getWorkerName() {
 51         return workerName;
 52     }
 53
 54     public void setWorkerName(String workerName) {
 55         this.workerName = workerName;
 56     }
 57
 58     public String getWorkerSex() {
 59         return workerSex;
 60     }
 61
 62     public void setWorkerSex(String workerSex) {
 63         this.workerSex = workerSex;
 64     }
 65
 66     public String getWorkerPartment() {
 67         return workerPartment;
 68     }
 69
 70     public void setWorkerPartment(String workerPartment) {
 71         this.workerPartment = workerPartment;
 72     }
 73
 74     public MyDate getWorkerBirthday() {
 75         return workerBirthday;
 76     }
 77
 78     public void setWorkerBirthday(MyDate workerBirthday) {
 79         this.workerBirthday = workerBirthday;
 80     }
 81
 82     public MyDate getWorkerBeginDate() {
 83         return workerBeginDate;
 84     }
 85
 86     public void setWorkerBeginDate(MyDate workerBeginDate) {
 87         this.workerBeginDate = workerBeginDate;
 88     }
 89
 90     //覆写toString方法
 91     @Override
 92     public String toString() {
 93         return "Worker [workerId=" + workerId + ", workerName=" + workerName
 94                 + ", workerSex=" + workerSex + ", workerPartment="
 95                 + workerPartment + ", workerBirthday=" + workerBirthday
 96                 + ", workerBeginDate=" + workerBeginDate + "]";
 97     }
 98
 99     //实现接口中compareTo()方法，按照出生日期，从大到小排序
100     @Override
101     public int compareTo(Worker temp) {
102
103         return this.getWorkerBirthday().compareTo(temp.getWorkerBirthday());
104     }
105
106 }

TestDemo类：

 1 /*
 2  * Description:定义测试类，模拟十个职工的单位,并且排序
 3  *
 4  * Written By:Cai
 5  *
 6  * Date Written:2017-10-09
 7  *
 8  * */
 9
10 package main;
11
12 import entity.*;
13
14 public class TestDemo {
15
16     public static void main(String args[]) {
17
18         Worker[] workers = new Worker[10];        //声明Worker类数组对象，大小为10
19
20         //为数组对象依次赋值
21         for( int i = 0; i < 10; i++ ) {
22
23             workers[i] = new Worker("00000" + i,"worker_" + i,"男","办公室" + i,new MyDate("199" + (9-i), ((9-i)) + "",((9-i)) + ""  ),
24                     new MyDate("200" + i, (i+1) + "",(i+1) + ""  ));
25         }
26
27         //对数组按照排序:按照生日由大到小排序
28         java.util.Arrays.sort(workers);
29
30         //打印数组对象
31         display(workers);
32
33     }
34
35     //定义方法，打印Worker类的数组对象信息
36     public static void display(Worker[] workers) {
37
38         for( int i = 0; i < workers.length; i++ ) {
39             System.out.println( workers[i] );
40         }
41     }
42
43 }