minio多个文件上传java后端接收

要使用Minio上传多个文件并在Java后端接收，你需要使用Minio Java SDK和Apache Commons FileUpload库来处理文件上传请求，以下是一个简单的示例代码：

import java.io.InputStream;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import io.minio.MinioClient;
import io.minio.errors.MinioException;
import io.minio.policy.PolicyType;

public class MinioUploadServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;
  private static final int MAX_FILE_SIZE = 1024 * 1024 * 5; // 5MB
  private static final int MAX_REQUEST_SIZE = 1024 * 1024 * 10; // 10MB

  private static final String MINIO_ENDPOINT = "http://<minio-host>:<minio-port>";
  private static final String MINIO_ACCESS_KEY = "<minio-access-key>";
  private static final String MINIO_SECRET_KEY = "<minio-secret-key>";
  private static final String MINIO_BUCKET_NAME = "<minio-bucket-name>";

  @Override
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // 检查请求是否为文件上传类型
    boolean isMultipart = ServletFileUpload.isMultipartContent(request);
    if (!isMultipart) {
      response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Invalid request type.");
      return;
    }

    // 设置上传文件的临时存储目录
    DiskFileItemFactory factory = new DiskFileItemFactory();
    factory.setRepository(new File(System.getProperty("java.io.tmpdir")));

    // 创建文件上传处理器
    ServletFileUpload upload = new ServletFileUpload(factory);
    upload.setFileSizeMax(MAX_FILE_SIZE);
    upload.setSizeMax(MAX_REQUEST_SIZE);

    // 连接到Minio服务
    MinioClient minioClient = new MinioClient.Builder()
        .endpoint(MINIO_ENDPOINT)
        .credentials(MINIO_ACCESS_KEY, MINIO_SECRET_KEY)
        .build();

    // 处理上传文件
    try {
      List<FileItem> items = upload.parseRequest(request);
      for (FileItem item : items) {
        if (!item.isFormField() && item.getSize() > 0) {
          // 上传文件到Minio服务
          String fileName = item.getName();
          InputStream stream = item.getInputStream();
          minioClient.putObject(MINIO_BUCKET_NAME, fileName, stream, item.getContentType());

          // 设置上传文件的访问权限
          minioClient.setObjectPolicy(MINIO_BUCKET_NAME, fileName, PolicyType.PUBLIC_READ);
        }
      }
    } catch (Exception e) {
      response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
      return;
    }

    // 返回上传结果
    response.setStatus(HttpServletResponse.SC_OK);
    response.getWriter().println("Upload successful.");
  }
}

在上面的示例代码中，我们首先检查请求是否为文件上传类型，然后设置上传文件的临时存储目录，并创建文件上传处理器。接下来，我们连接到Minio服务，处理上传文件，并将文件上传到Minio存储桶中。最后，我们为上传的文件设置访问权限，并返回上传结果。

注意，在使用上述代码之前，你需要先设置好Minio服务的访问密钥和桶名称，并将`io.minio:minio`和`org.apache.commons:commons-fileupload`库添加到你的Java项目中。