哈哈。大家平时都在使用电话本。以下使用java来模拟而一个简单的电话本吧...

首先给出联系人的抽象类

package net.itaem.po;

/**

*

* 电话人的信息

* */

public class User {

private String name;

private String phoneNumber;

private String companyName;

private String email;

private String address;

private String birthday;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getPhoneNumber() {

return phoneNumber;

}

public void setPhoneNumber(String phoneNumber) {

this.phoneNumber = phoneNumber;

}

public String getCompanyName() {

return companyName;

}

public void setCompanyName(String companyName) {

this.companyName = companyName;

}

public String getEmail() {

return email;

}

public void setEmail(String email) {

this.email = email;

}

public String getAddress() {

return address;

}

public void setAddress(String address) {

this.address = address;

}

public String getBirthday() {

return birthday;

}

public void setBirthday(String birthday) {

this.birthday = birthday;

}

@Override

public String toString() {

return "User [name=" + name + ", phoneNumber=" + phoneNumber

+ ", companyName=" + companyName + ", email=" + email

+ ", address=" + address + ", birthday=" + birthday + "]";

}

public User(String name, String phoneNumber, String companyName,

String email, String address, String birthday) {

this.name = name;

this.phoneNumber = phoneNumber;

this.companyName = companyName;

this.email = email;

this.address = address;

this.birthday = birthday;

}

public User(String name, String phoneNumber){

this.name = name;

this.phoneNumber = phoneNumber;

}

}

给出操作数据库的UserDao。这里仅仅是简单的模拟操作...所以使用打印来提示操作结果

以下给出工具类，用来获得MVC中的VIEW的请求内容

package net.itaem.tool;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class GetInput {

private static BufferedReader bufReader;

static{

bufReader = new BufferedReader(new InputStreamReader(System.in));

}

public static String getInputString(String info) throws IOException{

System.out.println(info);

String result = null;

result = bufReader.readLine(); //读取内存输入的一行数据

return result;

}

public static void main(String[] args) throws IOException{

}

}

以下给出控制类，相当于MVC中的C，Controller，这个类负责和DAO，VIEW，TOOL等其他类交互...

package net.itaem.operate;

import java.io.IOException;

import net.itaem.dao.UserDao;

import net.itaem.po.User;

import net.itaem.tool.GetInput;

/**

* 操作类

* */

public class Operate {

public Operate(){

start();

}

public void start(){

try {

while(true){ //一直执行

run();

}

} catch (IOException e) {

e.printStackTrace();

}

}

private void run() throws IOException{

System.out.println("======================电话本===================");

System.out.println("1查看全部联系人");

System.out.println("2添加联系人");

System.out.println("3删除联系人");

System.out.println("4搜索联系人");

System.out.println("5退出");

String choose = GetInput.getInputString("输入你的选择");

char choice = choose.toCharArray()[0];

switch(choice){

case ‘1‘:

System.out.println(UserDao.getInstance().findAll()); //输出全部电话本用户

break;

case ‘2‘:

UserDao.getInstance().add(new User(GetInput.getInputString("输入名字"),

GetInput.getInputString("输入电话号码")));

break;

case ‘3‘:

UserDao.getInstance().delete(new User(GetInput.getInputString("输入名字"),

GetInput.getInputString("输入电话号码")));

break;

case ‘4‘:

System.out.println(UserDao.getInstance().findUsersByKeyword(GetInput.getInputString("输入要查询的keyword")));

break;

case ‘5‘:

exit();

break;

default:

System.out.println("sorry your input was wrong, please input 1、2、3、4");

}

}

private void exit(){

System.exit(0); //退出

}

public static void main(String[] args) {

new Operate().start();

}

}

详细的程序执行结果大家能够自己測试下，或者读读代码看看也应该能够明确...

以下是类图：

总结：这个模拟并没有什么太大的难度。可是重点就是使用面向对象的思想去设计，然后各个类之间达到解耦。