使用异常捕获机制完成下述读取操作 读取emptxt文件并将每个员工信息读取出来以一个Emp实例保存然后将 这些Emp实例存入到一个Map集合中。其中key为字符串是该员工名字而value 是该Emp实例。 存入后要求用户输入一个员工的名字如张三 若该员工存在则输出该员工所有信息Emp的toString方法返回的字符串 输入的员工名若是英文不要求区分大小写。 若输入的员工名字不存在则显

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class EmpTest {
    public static void main(String[] args) {
        Map<String, Emp> map = new HashMap<String, Emp>();
        try (BufferedReader br = new BufferedReader(new FileReader("emp.txt"))) {
            String line;
            while ((line = br.readLine()) != null) {
                String[] arr = line.split(",");
                Emp emp = new Emp(arr[0], Integer.parseInt(arr[1]), arr[2], Double.parseDouble(arr[3]));
                map.put(emp.getName(), emp);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入员工名字：");
        String name = scanner.nextLine();
        Emp emp = map.get(name.toLowerCase());
        if (emp == null) {
            System.out.println("查无此人");
        } else {
            System.out.println(emp.toString());
        }
    }
}

class Emp {
    private String name;
    private int age;
    private String gender;
    private double salary;

    public Emp(String name, int age, String gender, double salary) {
        this.name = name;
        this.age = age;
        this.gender = gender;
        this.salary = salary;
    }

    public String getName() {
        return name;
    }

    public String toString() {
        return "姓名：" + name + "，年龄：" + age + "，性别：" + gender + "，薪资：" + salary;
    }
}
``