check 是否已存在分享文件 否 -> 通过模板生成文件 上传并且记录路径 是 -> 和当前使用模板对比 是 如果版本一致，返回 否 产生文件 上传并且记录路径 用Java实现代码

好的，以下是一个可能的Java实现代码，供参考：

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class FileUploader {
    private static final String TEMPLATES_DIR = "/templates";
    private static final String UPLOADS_DIR = "/uploads";

    public String uploadFile(String fileName, String templateVersion) throws IOException {
        // Check if the file already exists in the uploads directory
        File file = new File(UPLOADS_DIR + "/" + fileName);
        if (file.exists()) {
            // Compare with the current template version
            String currentVersion = getCurrentTemplateVersion(fileName);
            if (currentVersion.equals(templateVersion)) {
                return file.getPath();
            }
        }

        // Generate file using template and upload it
        String filePath = generateFileFromTemplate(fileName);
        uploadFileToServer(filePath);

        // Record file path and template version
        recordFileDetails(fileName, templateVersion, filePath);

        return filePath;
    }

    private String generateFileFromTemplate(String fileName) throws IOException {
        // Load template file
        Path templatePath = Paths.get(TEMPLATES_DIR + "/" + fileName);
        String templateContent = Files.readString(templatePath);

        // Replace placeholders in template with actual values
        String fileContent = replacePlaceholders(templateContent);

        // Generate file using the modified template
        Path filePath = Paths.get(UPLOADS_DIR + "/" + fileName);
        Files.writeString(filePath, fileContent);

        return filePath.toString();
    }

    private void uploadFileToServer(String filePath) {
        // Upload file to the server
        // ...
    }

    private void recordFileDetails(String fileName, String templateVersion, String filePath) {
        // Record the file path and template version in a database or log file
        // ...
    }

    private String getCurrentTemplateVersion(String fileName) {
        // Query the database or log file to get the current template version for the given file
        // ...
        return "1.0"; // Placeholder
    }

    private String replacePlaceholders(String templateContent) {
        // Replace placeholders in the template with actual values
        // ...
        return ""; // Placeholder
    }
}

请注意，这只是一个简单的示例实现。具体实现可能因情况而异，需要根据实际需求进行更改和调整。