java/新闻网爬虫/CommandController.java

package com.cctv.news.controller;

import com.cctv.news.command.Command;
import com.cctv.news.view.OutputView;

import java.util.HashMap;
import java.util.Map;

public class CommandController {
    private final Map<String, Command> commands;
    private final OutputView view;

    public CommandController(OutputView view) {
        this.view = view;
        this.commands = new HashMap<>();
    }

    public void registerCommand(Command command) {
        commands.put(command.getName(), command);
    }

    public void executeCommand(String input) {
        if (input == null || input.trim().isEmpty()) {
            view.showError("命令不能为空");
            return;
        }

        String[] parts = input.trim().split("\\s+");
        String commandName = parts[0];
        String[] args = parts.length > 1 ? java.util.Arrays.copyOfRange(parts, 1, parts.length) : new String[0];

        Command command = commands.get(commandName);
        if (command != null) {
            try {
                command.execute(args);
            } catch (Exception e) {
                view.showError("执行命令时出错: " + e.getMessage());
            }
        } else {
            view.showError("未知命令: " + commandName + "，输入 help 查看可用命令");
        }
    }
}