java:简单电话簿

请用面向对象方法设计并实现一个简单电话簿，包括如下功能： 
1.能设置并以文件保存若干姓名、联系电话和电邮地址。 
2.根据输入的姓名，在已经保存的文件中查询相应的联系电话和电邮地址，并显示查询结果。 

3.根据输入的电话号码，在已经保存的文件中查询相应的联系人姓名，并显示查询结果。

将输入的数据保存到文件中。

import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.HashMap;import java.util.Map;public class IOUtil {public static Map<String, PhoneBook> phoneDatas = new HashMap<String, PhoneBook>();public static final String DATA_FILE = "data.bat";static {load();}public static boolean save(String name,String phoneNum,String email){phoneDatas.put(name, new PhoneBook(name,phoneNum,email));try {FileOutputStream out = new FileOutputStream(DATA_FILE);out.write((name+" "+phoneNum+" "+email).getBytes());out.flush();out.close();return true;} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return false;}public static boolean load() {try {FileInputStream in = new FileInputStream(DATA_FILE);byte[] bs = new byte[1024];int len = 0;StringBuilder dataStr = new StringBuilder();while ((len = in.read(bs)) != -1) {dataStr.append(new String(bs, 0, len));}String[] dataStrs = dataStr.toString().trim().split("\\s+");if (dataStrs.length > 1) {for (int i = 0; i < dataStrs.length; i += 3) {phoneDatas.put(dataStrs[i],new PhoneBook(dataStrs[i],dataStrs[i+1],dataStrs[i+2]));}}return true;} catch (FileNotFoundException e) {try {new File(DATA_FILE).createNewFile();} catch (IOException e1) {e1.printStackTrace();}} catch (IOException e) {e.printStackTrace();}return false;}}

电话簿类

public class PhoneBook {private String name;private String phoneNum;private String email;public PhoneBook() {}public PhoneBook(String name, String phoneNum, String email) {super();this.name = name;this.phoneNum = phoneNum;this.email = email;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPhoneNum() {return phoneNum;}public void setPhoneNum(String phoneNum) {this.phoneNum = phoneNum;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}}

main

import java.util.Collection;import java.util.Scanner;public class Main {static Scanner input = new Scanner(System.in);public static void main(String[] args) {String name ;do {System.out.println("可进行的操作有：");System.out.println("1.存入信息");System.out.println("2.通过姓名查询其他信息");System.out.println("3.通过电话查询其他信息");System.out.print("请输入您要进行的操作：");switch (input.nextInt()) {case 1:System.out.print("请输入姓名：");name = input.next();System.out.print("请输入电话号码：");String phoneNum = input.next();System.out.print("请输入邮箱：");String email = input.next();IOUtil.save(name, phoneNum, email);break;case 2:System.out.println("通过姓名查询其他信息");findByName();break;case 3:System.out.println("通过电话查询其他信息");findByPhoneNum();break;default:System.out.println("没有该操作！");}System.out.print("是否继续操作（y/n）：");} while ("y".equals(input.next()));}public static void findByName() {String name ;System.out.print("请输入需要查询的姓名：");name = input.next();if(IOUtil.phoneDatas.containsKey(name)){System.out.println(name+"的电话号码是:"+IOUtil.phoneDatas.get(name).getPhoneNum()+",邮箱是："+IOUtil.phoneDatas.get(name).getEmail());}else{System.out.println("没有名为"+name+"的信息。");}}public static void findByPhoneNum(){System.out.print("请输入需要查询的号码：");String phoneNum = input.next();Collection<PhoneBook> pbs = IOUtil.phoneDatas.values(); for(PhoneBook pb:pbs){if(phoneNum.equals(pb.getPhoneNum())){System.out.print("电话号码为"+phoneNum+"的姓名是："+pb.getName()+",邮箱是："+pb.getEmail());return;}}System.out.println("没有电话号码为"+phoneNum+"的信息。");}}