用java来实现利用文件构建用户电话号码本。（需实现增、删、查（按指定属性排序并查询）、改、显示的功能）。 1. “添加”功能（addEntry）：接收用户的输入，将新的记录添加到文件中 2. “删除”功能（removeEntry）：接收用户输入的姓名或电话号码，搜索文件中相应的记录并将其删除。 3. “查询”功能(sortedSearch)：接收用户输入的排序方式和查询关键词，对文件中的记录按照指定属性进行排序并进行查询。 4. “修改”功能（updateEntry）：接收用户输入的姓名或电话号码，搜索文件中相应的记录并将其更新为新输入的信息。 5. “显示”功能（displayEntries）：从文件中读取并展示所有已存储的记录。

以下是一个简单的示例代码：

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

public class PhoneBook {
    private static final String FILE_NAME = "phonebook.txt";
    private static final String[] ATTRIBUTES = {"Name", "Phone Number"};
    private static final String DELIMITER = ",";

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("Please select an option:");
            System.out.println("1. Add Entry");
            System.out.println("2. Remove Entry");
            System.out.println("3. Sorted Search");
            System.out.println("4. Update Entry");
            System.out.println("5. Display Entries");
            System.out.println("6. Exit");
            int option = scanner.nextInt();
            scanner.nextLine(); // consume the \n character
            switch (option) {
                case 1:
                    addEntry(scanner);
                    break;
                case 2:
                    removeEntry(scanner);
                    break;
                case 3:
                    sortedSearch(scanner);
                    break;
                case 4:
                    updateEntry(scanner);
                    break;
                case 5:
                    displayEntries();
                    break;
                case 6:
                    System.exit(0);
                    break;
                default:
                    System.out.println("Invalid option!");
            }
        }
    }

    private static void addEntry(Scanner scanner) {
        System.out.println("Please enter the name:");
        String name = scanner.nextLine();
        System.out.println("Please enter the phone number:");
        String phoneNumber = scanner.nextLine();
        try (PrintWriter writer = new PrintWriter(new FileWriter(FILE_NAME, true))) {
            writer.println(name + DELIMITER + phoneNumber);
            System.out.println("Entry added successfully!");
        } catch (IOException e) {
            System.out.println("Error: " + e.getMessage());
        }
    }

    private static void removeEntry(Scanner scanner) {
        System.out.println("Please enter the name or phone number to remove:");
        String query = scanner.nextLine();
        List<String> lines = readAllLines();
        boolean found = false;
        try (PrintWriter writer = new PrintWriter(new FileWriter(FILE_NAME))) {
            for (String line : lines) {
                String[] parts = line.split(DELIMITER);
                if (!parts[0].equals(query) && !parts[1].equals(query)) {
                    writer.println(line);
                } else {
                    found = true;
                }
            }
        } catch (IOException e) {
            System.out.println("Error: " + e.getMessage());
        }
        if (found) {
            System.out.println("Entry removed successfully!");
        } else {
            System.out.println("Entry not found!");
        }
    }

    private static void sortedSearch(Scanner scanner) {
        System.out.println("Please select an attribute to sort by:");
        for (int i = 0; i < ATTRIBUTES.length; i++) {
            System.out.println((i + 1) + ". " + ATTRIBUTES[i]);
        }
        int attributeIndex = scanner.nextInt() - 1;
        scanner.nextLine(); // consume the \n character
        System.out.println("Please enter the search query:");
        String query = scanner.nextLine();
        List<String> lines = readAllLines();
        List<String[]> entries = new ArrayList<>();
        for (String line : lines) {
            String[] parts = line.split(DELIMITER);
            entries.add(parts);
        }
        Collections.sort(entries, new Comparator<String[]>() {
            @Override
            public int compare(String[] o1, String[] o2) {
                return o1[attributeIndex].compareTo(o2[attributeIndex]);
            }
        });
        boolean found = false;
        for (String[] entry : entries) {
            if (entry[attributeIndex].contains(query)) {
                System.out.println(entry[0] + " " + entry[1]);
                found = true;
            }
        }
        if (!found) {
            System.out.println("No matching entries found!");
        }
    }

    private static void updateEntry(Scanner scanner) {
        System.out.println("Please enter the name or phone number to update:");
        String query = scanner.nextLine();
        List<String> lines = readAllLines();
        boolean found = false;
        try (PrintWriter writer = new PrintWriter(new FileWriter(FILE_NAME))) {
            for (String line : lines) {
                String[] parts = line.split(DELIMITER);
                if (!parts[0].equals(query) && !parts[1].equals(query)) {
                    writer.println(line);
                } else {
                    System.out.println("Please enter the new name:");
                    String name = scanner.nextLine();
                    System.out.println("Please enter the new phone number:");
                    String phoneNumber = scanner.nextLine();
                    writer.println(name + DELIMITER + phoneNumber);
                    found = true;
                }
            }
        } catch (IOException e) {
            System.out.println("Error: " + e.getMessage());
        }
        if (found) {
            System.out.println("Entry updated successfully!");
        } else {
            System.out.println("Entry not found!");
        }
    }

    private static void displayEntries() {
        List<String> lines = readAllLines();
        for (String line : lines) {
            String[] parts = line.split(DELIMITER);
            System.out.println(parts[0] + " " + parts[1]);
        }
    }

    private static List<String> readAllLines() {
        List<String> lines = new ArrayList<>();
        try (BufferedReader reader = new BufferedReader(new FileReader(FILE_NAME))) {
            String line;
            while ((line = reader.readLine()) != null) {
                lines.add(line);
            }
        } catch (IOException e) {
            System.out.println("Error: " + e.getMessage());
        }
        return lines;
    }
}

注意，这只是一个简单的示例代码，可能需要根据具体需求进行修改和优化。此外，文件格式和路径也需要根据实际情况进行设置。