Java实现简单的通讯录

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简单的通讯录实现，跟写Java实现图书管理系统差不多，用到的知识也差不多，就当个小练习，练习一下写Java程序的手感。

Java实现图书管理系统

关于通讯录的代码都写在下面了

1. 代码

1.1 contact 包

1.1.1 Contact

package contact;

public class Contact {
    private int size;//当前占用容量
    private Person[] people = new Person[3];

    public int getSize() {
        return size;
    }

    public void setSize(int size) {
        this.size = size;
    }

    public Person getPerson(int pos) {
        return people[pos];
    }

    public void setPerson(Person person,int pos) {
        this.people[pos] = person;
    }

    public Boolean isFull(Contact contact) {
        return contact.getSize() == people.length;
    }
}

1.1.2 Person

package contact;

public class Person {
    private String name;
    private String sex;
    private int age;
    private String telephone;

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    @Override
    public String toString() {
        return "Person{" +
                "名字='" + name + '\'' +
                ", 性别='" + sex + '\'' +
                ", 年龄=" + age +
                ", 电话='" + telephone + '\'' +
                '}';
    }

    public Person(String name, String sex, int age, String telephone) {
        this.name = name;
        this.sex = sex;
        this.age = age;
        this.telephone = telephone;
    }
}

1.2 option 包

1.2.1 AddContact

package option;

import contact.Contact;
import contact.Person;

import java.util.Scanner;

public class AddContact implements IOperation{
    @Override
    public void work(Contact contact) {
        if(contact.isFull(contact)) {
            System.out.println("通讯录已满，无法添加！");
            return;
        }else {
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入联系人姓名:>");
            String name = scanner.nextLine();
            System.out.println("请输入联系人性别:>");
            String sex = scanner.nextLine();
            System.out.println("请输入联系人年龄:>");
            int age = scanner.nextInt();
            System.out.println("请输入联系人电话:>");
            String telephone = scanner.next();
            Person person = new Person(name,sex,age,telephone);

            int size = contact.getSize();
            contact.setPerson(person,size);
            contact.setSize(size+1);
            System.out.println("添加成功！");
        }
    }


}

1.2.2 DelContact

package option;

import contact.Contact;

import java.util.Scanner;

public class DelContact implements IOperation{
    @Override
    public void work(Contact contact) {
        int size = contact.getSize();
        if(0 == size) {
            System.out.println("通讯录为空，无法删除！");
            return;
        }else {
            System.out.println("请输入要删除的联系人姓名");
            Scanner scanner = new Scanner(System.in);
            String name = scanner.nextLine();

            for (int i = 0; i < size; i++) {
                if(name.equals(contact.getPerson(i).getName())) {
                    //删除
                    for (int j = i; j < size-1; j++) {
                        contact.setPerson(contact.getPerson(j+1),j);
                    }
                    contact.setSize(size-1);
                    System.out.println("删除成功！");
                    return;
                }
            }

            System.out.println("没有你要删除的联系人！");
        }
    }
}

1.2.3 ExitContact

package option;

import contact.Contact;

public class ExitContact implements IOperation{
    @Override
    public void work(Contact contact) {
        //释放占用内存
        for (int i = 0; i < contact.getSize(); i++) {
            contact.setPerson(null,i);
        }
        System.out.println("退出成功！");
        System.exit(0);
    }
}

1.2.4 FindContact

package option;

import contact.Contact;

import java.util.Scanner;

public class FindContact implements IOperation{
    @Override
    public void work(Contact contact) {
        int size = contact.getSize();
        System.out.println("请输入要查找的联系人姓名");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();

        for (int i = 0; i < size; i++) {
            if(name.equals(contact.getPerson(i).getName())) {
                System.out.println(contact.getPerson(i).toString());
                return;
            }
        }

        System.out.println("没有你要查找的联系人！");
    }
}

1.2.5 IOperation 接口

package option;

import contact.Contact;

public interface IOperation {
    void work(Contact contact);
}

1.2.6 ModifyContact

package option;

import contact.Contact;
import contact.Person;

import java.util.Scanner;

public class ModifyContact implements IOperation{
    @Override
    public void work(Contact contact) {
        int size = contact.getSize();
        System.out.println("请输入要修改的联系人姓名");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();

        for (int i = 0; i < size; i++) {
            if(name.equals(contact.getPerson(i).getName())) {
                //修改
                System.out.println("请输入联系人姓名:>");
                String name1 = scanner.nextLine();
                System.out.println("请输入联系人性别:>");
                String sex = scanner.nextLine();
                System.out.println("请输入联系人年龄:>");
                int age = scanner.nextInt();
                System.out.println("请输入联系人电话:>");
                String telephone = scanner.next();
                Person person = new Person(name1,sex,age,telephone);

                contact.setPerson(person,i);
                System.out.println("修改成功！");
                return;
            }
        }

        System.out.println("没有你要修改的联系人！");
    }
}

1.2.7 ShowContact

package option;

import contact.Contact;

public class ShowContact implements IOperation{
    @Override
    public void work(Contact contact) {
        if(0 == contact.getSize()) {
            System.out.println("通讯录为空");
            return;
        }else {
            for (int i = 0; i < contact.getSize(); i++) {
                System.out.println(contact.getPerson(i).toString());
            }
        }
    }
}

1.3 Main

import contact.Contact;
import option.AddContact;

import java.util.Scanner;

public class Main {
    public static int menu() {
        System.out.println("*********************");
        System.out.println("1.新增联系人");
        System.out.println("2.删除联系人");
        System.out.println("3.展示联系人");
        System.out.println("4.查找联系人");
        System.out.println("5.修改联系人");
        System.out.println("0.退出通讯录");
        System.out.println("*********************");
        System.out.println("请输入选项:>");

        Scanner scanner = new Scanner(System.in);
        return scanner.nextInt();
    }
    public static void main(String[] args) {
        int op;
        User user = new User();
        Contact contact = new Contact();
        do {
            op = menu();
            if(op > user.iOperation.length || op < 0) {
                System.out.println("输入错误！");
                continue;
            }
            user.doOperation(contact,op);
        }while (0 != op);
    }
}

1.4 User

import contact.Contact;
import option.*;

public class User {
    IOperation[] iOperation = new IOperation[]{
            new ExitContact(),
            new AddContact(),
            new DelContact(),
            new ShowContact(),
            new FindContact(),
            new ModifyContact(),
    };
    public void doOperation(Contact contact,int op) {
        this.iOperation[op].work(contact);
    }
}