我需要java实现从浏览器获取文件并上传到OSS的代码

以下是Java实现从浏览器获取文件并上传到OSS的代码示例：

import java.io.File;
import java.io.IOException;
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.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.model.PutObjectRequest;

public class FileUploadServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    private static final String ACCESS_KEY_ID = "your_access_key_id";
    private static final String ACCESS_KEY_SECRET = "your_access_key_secret";
    private static final String ENDPOINT = "your_endpoint";
    private static final String BUCKET_NAME = "your_bucket_name";

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        DiskFileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);

        try {
            // 解析上传的文件
            @SuppressWarnings("unchecked")
            java.util.List<FileItem> items = upload.parseRequest(request);

            // 遍历上传的文件
            for (FileItem item : items) {
                if (!item.isFormField()) {
                    // 获取文件名
                    String fileName = item.getName();

                    // 上传到OSS
                    OSS ossClient = new OSSClientBuilder().build(ENDPOINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET);
                    ossClient.putObject(new PutObjectRequest(BUCKET_NAME, fileName, item.getInputStream()));
                    ossClient.shutdown();
                }
            }

            response.getWriter().print("Upload success");

        } catch (FileUploadException e) {
            e.printStackTrace();
            response.getWriter().print("Upload failed");
        }
    }
}

在这个示例中，我们使用了Apache Commons FileUpload库来解析上传的文件。我们遍历上传的文件并将其上传到阿里云OSS。

在上传之前，您需要将ACCESS_KEY_ID，ACCESS_KEY_SECRET，ENDPOINT和BUCKET_NAME替换为您自己的阿里云OSS凭据和桶信息。