我有一个接受分段上传的java应用程序,我的问题是我想要一个HTML/JSP前端,而不是仅仅在服务器上工作。根据我提供的代码,实现此目的的最佳方法是什么。这对我来说有点困惑,因为我不确定如何将文件上传部分带入 html/jsp 页面。任何建议都会有所帮助。
非常感谢,
语气
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import com.amazonaws.AmazonClientException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.ClasspathPropertiesFileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.ProgressEvent;
import com.amazonaws.services.s3.model.ProgressListener;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.amazonaws.services.s3.transfer.TransferManager;
import com.amazonaws.services.s3.transfer.Upload;
public class S3TransferProgressSample {
private static AWSCredentials credentials;
private static TransferManager tx;
private static String bucketName;
private JProgressBar pb;
private JFrame frame;
private Upload upload;
private JButton button;
public static void main(String[] args) throws Exception {
AmazonS3 s3 = new AmazonS3Client(credentials = new ClasspathPropertiesFileCredentialsProvider().getCredentials());
Region usWest2 = Region.getRegion(Regions.US_WEST_2);
s3.setRegion(usWest2);
tx = new TransferManager(s3);
bucketName = "s3-upload-sdk-sample-" + credentials.getAWSAccessKeyId().toLowerCase();
new S3TransferProgressSample();
}
public S3TransferProgressSample() throws Exception {
frame = new JFrame("Amazon S3 File Upload");
button = new JButton("Choose File...");
button.addActionListener(new ButtonListener());
pb = new JProgressBar(0, 100);
pb.setStringPainted(true);
frame.setContentPane(createContentPane());
frame.pack();
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
class ButtonListener implements ActionListener {
public void actionPerformed(ActionEvent ae) {
JFileChooser fileChooser = new JFileChooser();
int showOpenDialog = fileChooser.showOpenDialog(frame);
if (showOpenDialog != JFileChooser.APPROVE_OPTION) return;
createAmazonS3Bucket();
ProgressListener progressListener = new ProgressListener() {
public void progressChanged(ProgressEvent progressEvent) {
if (upload == null) return;
pb.setValue((int)upload.getProgress().getPercentTransfered());
switch (progressEvent.getEventCode()) {
case ProgressEvent.COMPLETED_EVENT_CODE:
pb.setValue(100);
break;
case ProgressEvent.FAILED_EVENT_CODE:
try {
AmazonClientException e = upload.waitForException();
JOptionPane.showMessageDialog(frame,
"Unable to upload file to Amazon S3: " + e.getMessage(),
"Error Uploading File", JOptionPane.ERROR_MESSAGE);
} catch (InterruptedException e) {}
break;
}
}
};
File fileToUpload = fileChooser.getSelectedFile();
PutObjectRequest request = new PutObjectRequest(
bucketName, fileToUpload.getName(), fileToUpload)
.withProgressListener(progressListener);
upload = tx.upload(request);
}
}
private void createAmazonS3Bucket() {
try {
if (tx.getAmazonS3Client().doesBucketExist(bucketName) == false) {
tx.getAmazonS3Client().createBucket(bucketName);
}
} catch (AmazonClientException ace) {
JOptionPane.showMessageDialog(frame, "Unable to create a new Amazon S3 bucket: " + ace.getMessage(),
"Error Creating Bucket", JOptionPane.ERROR_MESSAGE);
}
}
private JPanel createContentPane() {
JPanel panel = new JPanel();
panel.add(button);
panel.add(pb);
JPanel borderPanel = new JPanel();
borderPanel.setLayout(new BorderLayout());
borderPanel.add(panel, BorderLayout.NORTH);
borderPanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
return borderPanel;
}
}
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