package Test;public class Student implements Comparable<Student> {private String name;private String number ;private String sex ;private int age;private String province;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getnumber() {return number;}public void setnumber(String number) {this.number = number;}public String getsex() {return sex ;}public void setsex(String sex ) {this.sex =sex ;}public int getage() {return age;}public void setage(int age) {// int a = Integer.parseInt(age);this.age= age;}public String getprovince() {return province;}public void setprovince(String province) {this.province=province ;}public int compareTo(Student o) {return this.name.compareTo(o.getName());}public String toString() {return  name+"\t"+sex+"\t"+age+"\t"+number+"\t"+province+"\n";}
}

import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStreamReader;import java.util.ArrayList;import java.util.Arrays;import java.util.Collections;import java.util.Scanner;public class Search{private static ArrayList<Person> Personlist1;public static void main(String[] args) {Personlist1 = new ArrayList<>();Scanner scanner = new Scanner(System.in);File file = new File("E:\\面向对象程序设计Java\\实验\\实验六\\身份证号.txt");try {FileInputStream F = new FileInputStream(file);BufferedReader in = new BufferedReader(new InputStreamReader(F));String temp = null;while ((temp = in.readLine()) != null) {Scanner linescanner = new Scanner(temp);linescanner.useDelimiter(" ");    String name = linescanner.next();String id = linescanner.next();String sex = linescanner.next();String age = linescanner.next();String place =linescanner.nextLine();Person Person = new Person();Person.setname(name);Person.setid(id);Person.setsex(sex);int a = Integer.parseInt(age);Person.setage(a);Person.setbirthplace(place);Personlist1.add(Person);}} catch (FileNotFoundException e) {System.out.println("查找不到信息");e.printStackTrace();} catch (IOException e) {System.out.println("信息读取有误");e.printStackTrace();}boolean isTrue = true;while (isTrue) {System.out.println("******************************************");System.out.println("1:按姓名字典顺序输出信息；");System.out.println("2:查询最大年龄与最小年龄人员信息；");System.out.println("3：按省份找你的同乡；");System.out.println("4:输入你的年龄,查询年龄与你最近人的信息；");System.out.println("5：退出");System.out.println("******************************************");int type = scanner.nextInt();switch (type) {case 1:Collections.sort(Personlist1);System.out.println(Personlist1.toString());break;case 2:int max=0,min=100;int j,k1 = 0,k2=0;for(int i=1;i<Personlist1.size();i++){j=Personlist1.get(i).getage();if(j>max){max=j; k1=i;}if(j<min){min=j; k2=i;}}  System.out.println("年龄最大："+Personlist1.get(k1));System.out.println("年龄最小："+Personlist1.get(k2));break;case 3:System.out.println("place?");String find = scanner.next();        String place=find.substring(0,3);String place2=find.substring(0,3);for (int i = 0; i <Personlist1.size(); i++) {if(Personlist1.get(i).getbirthplace().substring(1,4).equals(place)) {System.out.println("你的同乡："+Personlist1.get(i));}} break;case 4:System.out.println("年龄：");int yourage = scanner.nextInt();int close=ageclose(yourage);int d_value=yourage-Personlist1.get(close).getage();System.out.println(""+Personlist1.get(close));break;case 5:isTrue = false;System.out.println("再见!");break;default:System.out.println("输入有误");}}}public static int ageclose(int age) {int m=0;int    max=53;int d_value=0;int k=0;for (int i = 0; i < Personlist1.size(); i++){d_value=Personlist1.get(i).getage()-age;if(d_value<0) d_value=-d_value; if (d_value<max) {max=d_value;k=i;}}    return k;}}//jiekouwenjiaanpublic class Person implements Comparable<Person> {private String name;private String id;private int age;private String sex;private String birthplace;public String getname() {return name;}public void setname(String name) {this.name = name;}public String getid() {return id;}public void setid(String id) {this.id= id;}public int getage() {return age;}public void setage(int age) {// int a = Integer.parseInt(age);this.age= age;}public String getsex() {return sex;}public void setsex(String sex) {this.sex= sex;}public String getbirthplace() {return birthplace;}public void setbirthplace(String birthplace) {this.birthplace= birthplace;
}public int compareTo(Person o) {return this.name.compareTo(o.getname());}public String toString() {return  name+"\t"+sex+"\t"+age+"\t"+id+"\t";}