求完整的过程辛苦各位了

Question

编程读取销售数据，输出指定型号商品的销售总额。例如:输出A001，期待输出为10500。

Answer 1

你可以参考一下，希望采纳
路径换成你的文件所在绝对路径即可

import java.io.*;
import java.util.*;

public class Demo{

    public static void main(String[] args) throws IOException {
        FileReader fr = new FileReader("D:/IDEA/idea_Demo/.idea/test.txt");
        BufferedReader br = new BufferedReader(fr);
        String s = br.readLine();// 读取文件的1行

        Map<String, Double> map = new HashMap<>();
        double sum = 0;

        while (s != null) {
            String[] info = s.split("\t");
            String name = info[0];
            double sales = Double.parseDouble(info[1]);
            if (map.containsKey(name)) {
                double oldValue = map.get(name);
                map.put(name, sales + oldValue);
            } else {
                map.put(name, sales);
            }
            s = br.readLine();
        }
        br.close();


        Scanner sc = new Scanner(System.in);
        while (true) {
            System.out.print("输入指定商品型号：");
            String id = sc.nextLine();

            if (map.containsKey(id)) {
                System.out.println("销售总额是：" + map.get(id));
            } else {
                System.out.println("找不到该型号");
            }
        }
    }
}