读取两个文本文件并将这两个文本文件中的特定行写入第三个文件

Question

我正在创建一个医院管理系统，其中有 2 个 classes，即 AddDoctor 和 AddPatient，它们从用户那里获取关于他们的详细信息的输入，并将它们存储到各自的文件中。我现在想创建一个约会 class，我可以在其中将具有特定 ID 的患者分配给具有从文件中读取的特定 ID 的医生。如果 Java 支持多重继承，这将非常容易，但由于它不支持，我陷入了如何完成这项任务的困境。

以下是我的 AddDoctor class

class AddDoctor{
    int did;
    int dage;
    long dphno;
    String dname;
    String dgender;
    String dqualification;

    InputStreamReader in = new InputStreamReader(System.in);
    BufferedReader br = new BufferedReader(in);

    void input() throws IOException{
        System.out.print("Enter Doctor's Name:");
        dname = br.readLine();

        Random rand = new Random();
        did = rand.nextInt((9999 - 100) + 1) + 10;

        System.out.print("Enter Doctor's Phone Number:");
        dphno = Long.parseLong(br.readLine());

        System.out.print("Enter Doctor's Age:");
        dage = Integer.parseInt(br.readLine());

        System.out.print("Enter Doctor's Gender:");
        dgender = br.readLine();

        System.out.print("Enter Doctor's Qualification:");
        dqualification = br.readLine();
    }

    void delete() throws FileNotFoundException, IOException{
        Scanner in = new Scanner(System.in);
        File inputFile = new File("DoctorDetails.txt");
        File tempFile = new File("myTemp.txt");

        BufferedReader reader = new BufferedReader(new FileReader(inputFile));
        BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

        String currentLine;

        String lineToRemove;
        System.out.println("Enter the ID of the Doctor you wish to delete: ");
        lineToRemove = in.next();

        while((currentLine = reader.readLine()) != null) {
            String trimmedLine = currentLine.trim();
            if(trimmedLine.startsWith(lineToRemove)) continue;          
            writer.write((currentLine) + System.getProperty("line.separator"));
        }
        writer.close();
        reader.close();
        Files.move(tempFile.toPath(), inputFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
    }

    void search() throws IOException{
        Scanner scan=new Scanner(System.in);
        System.out.println("Enter the ID of the Doctor To Search:");
        String did=scan.next();
        String line="";
        try{
            FileInputStream fin = new FileInputStream("DoctorDetails.txt");
            Scanner sc = new Scanner(fin);
            while(sc.hasNextLine()){
                line=sc.nextLine();
                if(line.startsWith(did))
                    System.out.println(line+" ");
            }
            sc.close();
        }
        catch(IOException e){
            e.printStackTrace();
        }
    }
    
    void display(){
        try{
            BufferedReader br=new BufferedReader(new FileReader("DoctorDetails.txt"));
            String s="";
            while((s=br.readLine())!=null){
                String data[]=new String[6];
                data=s.split(" ");
                for(int i=0;i<6;i++){
                    System.out.print(data[i]+"\t");
                }
                System.out.println();
            }
            br.close();
        }
        catch(Exception e){
        }
    }
};


//Class WriteD to Write Doctor Details in a text file where the details are fetched from the Class AddDoctor
class WriteD extends AddDoctor {
        void write() {
            try(FileWriter fw = new FileWriter("DoctorDetails.txt",true);
                BufferedWriter bw = new BufferedWriter(fw);
                PrintWriter out = new PrintWriter(bw))
                {
                    out.println(did + " " + dname + " " + dphno + " " + dage + " " + dgender + " " + dqualification);
                }catch(IOException e){
                e.printStackTrace();
                }
        }
    };

以下是我的 AddPatient Class

    class AddPatient extends People{
    String pillness;
    String pregisterdate;

    InputStreamReader in = new InputStreamReader(System.in);
    BufferedReader br = new BufferedReader(in);

    void input() throws IOException{
        System.out.print("Enter Patient's Name:");
        name = br.readLine();

        Random rand1 = new Random();
        id = rand1.nextInt((9999 - 100) + 1) + 10;

        System.out.print("Enter Patient's Phone Number:");
        phno = Long.parseLong(br.readLine());

        System.out.print("Enter Patient's Age:");
        age = Integer.parseInt(br.readLine());

        System.out.print("Enter Patient's Gender:");
        gender = br.readLine();

        System.out.print("Enter Patient's Illness:");
        pillness = br.readLine();

        System.out.print("Enter Patient's Registration Date:");
        pregisterdate = br.readLine();
    }

    void delete() throws FileNotFoundException, IOException{
        Scanner in = new Scanner(System.in);
        File inputFile = new File("PatientDetails.txt");
        File tempFile = new File("myTemp2.txt");

        BufferedReader reader = new BufferedReader(new FileReader(inputFile));
        BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

        String currentLine;

        String lineToRemove;
        System.out.println("Enter the ID of the Patient you wish to delete: ");
        lineToRemove = in.next();

        while((currentLine = reader.readLine()) != null) {
            String trimmedLine = currentLine.trim();
            if(trimmedLine.startsWith(lineToRemove)) continue;
            writer.write((currentLine) + System.getProperty("line.separator"));
        }
        writer.close();
        reader.close();
        Files.move(tempFile.toPath(), inputFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
    }

    void search() throws IOException{
        Scanner scan=new Scanner(System.in);
        System.out.println("Enter the ID of the Patient To Search:");
        String did=scan.next();
        String line="";
        try{
            FileInputStream fin = new FileInputStream("PatientDetails.txt");
            Scanner sc = new Scanner(fin);
            while(sc.hasNextLine()){
                line=sc.nextLine();
                if(line.startsWith(did))
                    System.out.println(line);
            }
            sc.close();
        }
        catch(IOException e){
            e.printStackTrace();
        }
    }

    void display(){
        try{
            BufferedReader br=new BufferedReader(new FileReader("PatientDetails.txt"));
            String s="";
            while((s=br.readLine())!=null){
                String data[]=new String[7];
                data=s.split(" ");
                for(int i=0;i<7;i++){
                    System.out.print(data[i]+"\t");
                }
                System.out.println();
            }
            br.close();
        }
        catch(Exception e){
        }
    }
};

    class WriteP extends AddPatient {
        void write() {
                try(FileWriter fw = new FileWriter("PatientDetails.txt",true);
                    BufferedWriter bw = new BufferedWriter(fw);
                    PrintWriter out = new PrintWriter(bw))
                    {
                        out.println(String.format("%-1s %-1s %-1s %-1s %-1s %-1s %-1s",id,name,phno,age,gender,pillness,pregisterdate));
                    }catch(IOException e){
                    e.printStackTrace();
                    }
            }
        };

Answer 1

简单的解决方案是在约会中使用组合创建医生和患者的对象class并从用户那里获取医生和患者 ID，或者使用对象创建一个并将其写入第三个文件。

如果是 Id，您需要从文件中搜索信息。如果有新信息，您将创建医生和患者的对象。首先在他们的文件中将它们正确，然后根据需要将数据存储在第三个文件中。

如果它回答了你的问题，请告诉我。

Answer 2

创建约会 class 并使用接受要查找的 ID 的搜索方法（看起来与您已有的搜索方法相似）然后使用与您的 write 相似的代码写入新的文件.

读取两个文本文件并将这两个文本文件中的特定行写入第三个文件

Read two text files and write specific lines from those two text files into a third file

java

io

file

file-handling