从记事本上添加手机联系人

package File.out.production;

import java.io.Serializable;

/**
 * Created by dell on 2017/5/2.
 */
public class Contacts implements Serializable {
    private String name;
    private String sex;
    private String num;

    public Contacts(String name, String sex, String num) {
        this.name = name;
        this.sex = sex;
        this.num = num;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getNum() {
        return num;
    }

    public void setNum(String num) {
        this.num = num;
    }
}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

package File.out.production;

import java.io.*;
import java.text.Collator;
import java.util.*;


/**
 * Created by shihao on 2017/5/2.
 */
public class Test5 {
    static FileOutputStream f=null;
    static FileInputStream ff=null;
    static List<Contacts> list=null;
    static File fff=new File("F:/java/联系人.txt");
    static BufferedReader bin=new BufferedReader(new InputStreamReader(System.in));
    public static void main(String[] args) throws Exception {
        while(true){
            System.out.println("******手机联系人*********");
            System.out.println("******1.添加联系人*******");
            System.out.println("******2.查看联系人*******");
            System.out.println("******3.查找联系人*******");
            System.out.println("******4.退出*************");
            String s=bin.readLine();
            if("1".equals(s)){
                add();
            }
            if("2".equals(s)){
                look();
            }
            if("3".equals(s)){
                fand();
            }
            if("4".equals(s)){
                break;
            }
        }
        System.out.println("再见");
    }

    private static void fand() throws  Exception{
        System.out.println("1.根据姓名  2.根据电话");
        String  aa=bin.readLine();
        if("1".equals(aa)){
            name();
        }
        if("2".equals(aa)){
            nu();
        }
    }

    private static void nu() throws Exception{
        System.out.println("请输入号码");
        String  a=bin.readLine();
        ff=new FileInputStream(fff);
        ObjectInputStream in=new ObjectInputStream(ff);
        list= (List<Contacts>) in.readObject();
        int num=0;
        Set<Contacts> set=new TreeSet<Contacts>(((o1, o2) -> {
            Collator c=Collator.getInstance();
            return c.compare(o1.getName(),o2.getName());
        }));
        for (Contacts pp:list) {
            if(pp.getName().contains(a)){
                set.add(pp);
                num++;
            }
        }
        for (Contacts pp:set) {
            System.out.println("姓名:"+pp.getName()+"\t性别: "+pp.getSex()+"\t电话:"+pp.getNum());
        }
        in.close();
        System.out.println("共找到"+num+"条");
    }

    private static void name() throws Exception {
        System.out.println("请输入姓名");
        String  a=bin.readLine();
        ff=new FileInputStream(fff);
        ObjectInputStream in=new ObjectInputStream(ff);
        list=(List<Contacts>) in.readObject();
        int num=0;
        Set<Contacts> set=new TreeSet<Contacts>(((o1, o2) -> {
            Collator c=Collator.getInstance();
            return c.compare(o1.getName(),o2.getName());
        }));
        for (Contacts pp:list) {
            if(pp.getName().contains(a)){
                num++;
                set.add( pp);
            }
        }

        in.close();
        System.out.println("共找到"+num+"条");
        for (Contacts pp:set) {
            System.out.println("姓名:"+pp.getName()+"\t性别: "+pp.getSex()+"\t电话:"+pp.getNum());
        }
    }

    private static void look() throws Exception{
        ff=new FileInputStream(fff);
        ObjectInputStream in=new ObjectInputStream(ff);
        list=(List<Contacts>) in.readObject();
        for (Contacts pp:list) {
            System.out.println("姓名:"+pp.getName()+"\t性别: "+pp.getSex()+"\t电话:"+pp.getNum());
        }
        in.close();
    }

    private static void add() throws Exception{
        System.out.println("请输入联系人信息");
        System.out.println("姓名:");
        String a=bin.readLine();
        System.out.println("性别:");
        String b=bin.readLine();
        System.out.println("电话:");
        String c=bin.readLine();
        Contacts p=new Contacts(a,b,c);
        if(fff.length()==0){
            list=new ArrayList<>();
        }else {
            ff=new FileInputStream(fff);
            ObjectInputStream in=new ObjectInputStream(ff);
            list=(List<Contacts>) in.readObject();
        }
        list.add(p);
        f=new FileOutputStream(fff);
        ObjectOutputStream out=new ObjectOutputStream(f);
        out.writeObject(list);//把集合存进去，先判断有没有，有就先去出来，再添加  再放回去
        out.close();
    }
}