Java实现简单赛事通知（大二水平）

目录

前言

代码

总结

前言

 这里我是先创建学生名字，再询问学生要关注的赛事（这里使用map存），最后学校发布赛事，遍历这里的map，通过key比对每个学生的关注是否与发布的赛事相同，相同则将相同的赛事信息与Student放进新的map中，最后显示出来。

代码

 Student：定义Student

public class Student {

	private String name;

	public Student(String name) {
		// TODO Auto-generated method stub
		this.name = name;
	}

	public String getName(String name) {
		// TODO Auto-generated method stub
		return name;
	}

	@Override
	public String toString() {
		return name;
	}
}

Competition：定义Competition

public class Competition{

	private String cname;
	private String inf;

	public Competition(String cname, String inf) {
		// TODO Auto-generated method stub
		this.inf = inf;
		this.cname = cname;
	}

	public String getName(String cname) {
		// TODO Auto-generated method stub
		return cname;
	}

	public String getNo(String inf) {
		// TODO Auto-generated method stub
		return inf;
	}

	@Override
	public String toString() {
		return "赛名:'" + cname + '\'' + ", 信息:'" + inf + '\'' ;
	}
	
}

 Create：用于创建学生和学校发布竞赛

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Create {
	List<Student> students = new ArrayList<>();
	List<Competition> competitions = new ArrayList<>();
	static Scanner scanner = new Scanner(System.in);
	
	public List<Student> createStudent() {
		System.out.println("开始创建学生");
		int num = 1;
		System.out.println("请输入学生" + num + "的名字:");
		num++;
		String sname;
		while (!(sname = scanner.nextLine()).isEmpty()) { // 输入完毕直接按回车
			System.out.println("请输入学生" + num + "的名字:");
			Student student = new Student(sname);
			students.add(student);
			num++;
		}
		System.out.println("创建学生结束");
		return students;
	}

	public List<Competition> createCompetition() {		//这里可以创建重复的竞赛
		System.out.println("您选择创建多少个竞赛?");
		int comGeShu = scanner.nextInt();
		for (int i = 0; i < comGeShu; i++) {
			String cname = get();
			System.out.println("请输入竞赛" + cname + "的简介:");
			String inf = scanner.next();
			Competition competition = new Competition(cname, inf);
			competitions.add(competition);
		}
		return competitions;
	}

	public String get() {
		System.out.println("-------------------------");
		System.out.println("        请选择竞赛     ");
		System.out.println("1.--       天梯赛      --");
		System.out.println("2.-- 中国计算机设计大赛 --");
		System.out.println("3.-- 蓝桥杯个人赛软件类 --");
		System.out.println("4.--    “互联网+”比赛   --");
		System.out.println("-------------------------");
		System.out.println("给出您的选择:");
		int competition = scanner.nextInt();
		String cname = null;
		if (competition == 1) {
			cname = "天梯赛";
		} else if (competition == 2) {
			cname = "中国计算机设计大赛";
		} else if (competition == 3) {
			cname = "蓝桥杯个人赛软件类";
		} else if (competition == 4) {
			cname = "互联网比赛";
		} else {
			System.out.println("未找到该竞赛");
		}
		return cname;
	}
}

 Choose：学生选择关注的赛事

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Scanner;
import java.util.Set;

public class Choose {	//学生选择收藏
	List<Student> students = new ArrayList<>();
	static HashMap<Student, List<String>> want = new HashMap<>();
	static Scanner scanner = new Scanner(System.in);

	public Choose(List<Student> students) {
		this.students = students;
	}

	public HashMap<Student, List<String>> ChooseAll() { // 把学生和他的关注列表放入map
		for (int i = 0; i < students.size(); i++) {
			List<String> oneChoose = new ArrayList<>();
			oneChoose = find(i);
			Student sname = students.get(i);
			want.put(sname, oneChoose);
		}
		return want;
	}

	public List<String> find(int i) { // 选择单个学生想要关注的竞赛并放入列表
		List<String> competitions = new ArrayList<>();
		System.out.println("");
		System.out.println("选择" + students.get(i) + "想关注的竞赛");
		System.out.println("-------------------------");
		System.out.println("1.--       天梯赛      --");
		System.out.println("2.-- 中国计算机设计大赛 --");
		System.out.println("3.-- 蓝桥杯个人赛软件类 --");
		System.out.println("4.--    “互联网+”比赛   --");
		System.out.println("-------------------------");
		System.out.println("");
		System.out.println("给出您的选择:");
		String competition;
		while (!(competition = scanner.nextLine()).isEmpty()) {
			System.out.println("给出您的选择:");
			if (competition.equals("1")) {
				competitions.add("天梯赛");
			} else if (competition.equals("2")) {
				competitions.add("中国计算机设计大赛");
			} else if (competition.equals("3")) {
				competitions.add("蓝桥杯个人赛软件类");
			} else if (competition.equals("4")) {
				competitions.add("互联网比赛");
			} else {
				System.out.println("未找到该竞赛");
			}
		}
		return competitions;
	}

	
	public Set<Student> getKeys() {
		Set<Student> stu = new HashSet<>();
		stu.addAll(want.keySet());
		return stu;
	}

Main：

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
	static Create create = new Create();
	static List<Student> students = new ArrayList<>();
	static List<Competition> competitions = new ArrayList<>();
	static HashMap<Student, List<String>> want = new HashMap<>();
	static HashMap<Student, List<Competition>> message = new HashMap<>();

	public static void main(String[] args) {
		students = create.createStudent(); // 创建student
		Choose choose = new Choose(students);
		want = choose.ChooseAll(); // 创建map以学生为key 以想要的竞赛为value(list)
		competitions = create.createCompetition(); // 学校发布competition
		System.out.println("学校发布的赛事 :" + competitions.toString());
		Set<Student> keys = choose.getKeys();
		for (Student key : keys) {
			List<Competition> repeat = new ArrayList<>();
			repeat = receipt(key);
			message.put(key, repeat);
		}
		Set<Student> Mkeys = getMkeys();
		for (Student key : Mkeys) {
			System.out.println("学生" + key + " 关注的赛事 :" + message.get(key).toString());
		}

	}

	public static List<Competition> receipt(Student key) {
		List<String> values = new ArrayList<>();	 // 新list存value
		values.addAll(want.get(key));
		Competition rep = null;
		List<Competition> repeat = new ArrayList<>();	// 重复的赛事信息
		for (int i = 0; i < values.size(); i++) {	 // 从收藏夹找
			int flag=0;
			for (int j = 0; j < competitions.size() && flag==0; j++) {
				String Index = values.get(i);
				String queryString = competitions.get(j).toString();
				Pattern pattern = Pattern.compile(Index); 		// 从所有竞赛检索
				Matcher matcher = pattern.matcher(queryString);
				while (matcher.find()) {
					rep = competitions.get(j);
					repeat.add(rep);
					flag=1;
				}
			}
		}
		return repeat;
	}

	public static Set<Student> getMkeys() {
		Set<Student> stu = new HashSet<>();
		stu.addAll(message.keySet());
		return stu;
	}

}

总结

方法与类的定义不够简洁严谨，结构较复杂且一些输入格式的错误未解决。