Java/w12/datacollect/command/ExportCommand.java

package com.example.datacollect.command;

import com.example.datacollect.repository.ArticleRepository;
import com.example.datacollect.persist.JsonExporter;
import com.example.datacollect.view.ConsoleView;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

public class ExportCommand implements Command {
    private static final Logger logger = LoggerFactory.getLogger(ExportCommand.class);
    private final ConsoleView view;
    private final JsonExporter jsonExporter;

    public ExportCommand(ConsoleView view) {
        this.view = view;
        this.jsonExporter = new JsonExporter();
    }

    @Override
    public String getName() {
        return "export";
    }

    @Override
    public void execute(String[] args, ArticleRepository repository) {
        // 参数校验：export <filePath>
        if (args.length < 2) {
            String errorMsg = "用法: export <文件路径> (示例: export articles.json)";
            logger.error(errorMsg);
            view.printError(errorMsg);
            return;
        }

        String filePath = args[1];
        try {
            jsonExporter.export(repository, filePath);
            view.printSuccess("✅ 成功导出文章到: " + filePath);
        } catch (IOException e) {
            view.printError("❌ 导出失败: " + e.getMessage());
        }
    }
}