java文件上传工具类

您可以使用Apache Commons FileUpload来实现Java文件上传的工具类。该工具类可以将文件上传到服务器，并提供丰富的上传控制和进度报告。以下是一个简单的Java文件上传工具类的示例代码：

import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.util.List;

public class FileUploadUtils {

    public static final String UPLOAD_DIRECTORY = "uploads";

    public static boolean uploadFiles(HttpServletRequest request) {
        File uploadDir = new File(UPLOAD_DIRECTORY);
        if (!uploadDir.exists()) {
            uploadDir.mkdir();
        }
        
        boolean isMultipart = ServletFileUpload.isMultipartContent(request);
        if (!isMultipart) {
            return false;
        }
        
        DiskFileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        try {
            List<FileItem> items = upload.parseRequest(request);
            for (FileItem item : items) {
                if (!item.isFormField()) {
                    String fileName = new File(item.getName()).getName();
                    String filePath = UPLOAD_DIRECTORY + File.separator + fileName;
                    File uploadedFile = new File(filePath);
                    item.write(uploadedFile);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        
        return true;
    }
}

请注意，该示例代码需要进行适当调整以适应您的应用程序。