jsp如何上传多个文件

<form action="upload" method="post" enctype="multipart/form-data">
    <input type="file" name="files" multiple>
    <input type="submit" value="Upload">
</form>

<servlet>
    <servlet-name>FileUploadServlet</servlet-name>
    <servlet-class>com.example.FileUploadServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>FileUploadServlet</servlet-name>
    <url-pattern>/upload</url-pattern>
</servlet-mapping>

import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.FileItem;
import java.util.List;

public class FileUploadServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        if (ServletFileUpload.isMultipartContent(request)) {
            try {
                List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
                for (FileItem item : items) {
                    if (!item.isFormField()) {
                        String fileName = item.getName();
                        // 处理文件保存逻辑
                        item.write(new File("/path/to/save/" + fileName));
                    }
                }
                response.getWriter().println("Files uploaded successfully.");
            } catch (Exception ex) {
                response.getWriter().println("There was an error: " + ex.getMessage());
            }
        }
    }
}