java IO流 练习题 分析成绩单

Posted 2023-02-26 Code健行

java IO流 练习题

题目要求：

分析成绩单。

现在有如下格式的成绩单（文本格式）score.txt：

姓名:张三，数学72分，物理67分，英语70分.

姓名:李四，数学92分，物理98分，英语88分.

姓名:周五，数学68分，物理80分，英语77分.

要求按行读入取成绩单，并在该行的后面尾加上该同学的总成绩，然后再将该行写入到一个名字为socreAnalysis.txt的文件中

代码实现：

这段代码是将一个字符串中的数字提取出来，并相加

package IO;

import java.util.Scanner;

public class Deal 
    public int allScore(String str)
        Scanner scanner = new Scanner(str);
        scanner.useDelimiter("[^0123456789.]+");
        int total = 0;
        while (scanner.hasNext())
            try 
                int i = scanner.nextInt();
                System.out.println(i);
                total = total + i;
            catch(Exception e)
                scanner.next();
            
        
        return total;
    

package IO;

import java.io.*;

public class Test 

    public static void main(String[] args) 
        FileReader fileReader=null;
        FileWriter fileWriter=null;
        BufferedReader bufferedReader=null;
        BufferedWriter bufferedWriter=null;
        try 
             fileReader = new FileReader("D:\\\\Socre.txt");
             fileWriter= new FileWriter("E:\\\\SocreAnalysis.txt");
             bufferedReader = new BufferedReader(fileReader);
             bufferedWriter = new BufferedWriter(fileWriter);

            String b;
            while ((b=bufferedReader.readLine())!=null)
                System.out.println(b);

                Deal deal = new Deal();
                int i = deal.allScore(b);

                bufferedWriter.write(b+"总成绩"+i);
                bufferedWriter.newLine();
            

         catch (FileNotFoundException e) 
            e.printStackTrace();
         catch (IOException e) 
            e.printStackTrace();
        finally 
            try 
                fileReader.close();
                bufferedWriter.flush();
                fileWriter.close();
                bufferedReader.close();
                bufferedWriter.close();
             catch (IOException e) 
                e.printStackTrace();