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我試圖從我的網絡攝像頭捕獲圖像，但在saveJPG方法中出現錯誤。我的Java代碼訪問限制錯誤
錯誤：
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- Access restriction: The type JPEGCodec is not accessible due to restriction on required library C:\Program Files\Java\jre7\lib\rt.jar
- Access restriction: The method createJPEGEncoder(OutputStream) from the type JPEGCodec is not accessible due to restriction on required library C:
\Program Files\Java\jre7\lib\rt.jar
- Access restriction: The type JPEGImageEncoder is not accessible due to restriction on required library C:\Program Files\Java\jre7\lib\rt.jar
在我saveJPG方法發生在我行此錯誤
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(0.5f,false);
encoder.setJPEGEncodeParam(param);
CODE：
JButton startC = new JButton("Capturar");
startC.setPreferredSize(new Dimension(100,22));
startC.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
// Grab a frame
FrameGrabbingControl fgc = (FrameGrabbingControl)
player.getControl("javax.media.control.FrameGrabbingControl");
buf = fgc.grabFrame();
// Convert it to an image
btoi = new BufferToImage((VideoFormat)buf.getFormat());
img = btoi.createImage(buf);
// show the image
//imgpanel.setImage(img);
// save image
saveJPG(img,"c:\\test.jpg");
}
});
public static void saveJPG(Image img, String s)
{
BufferedImage bi = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, null, null);
FileOutputStream out = null;
try
{
out = new FileOutputStream(s);
}
catch (java.io.FileNotFoundException io)
{
System.out.println("File Not Found");
}
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(0.5f,false);
encoder.setJPEGEncodeParam(param);
try
{
encoder.encode(bi);
out.close();
}
catch (java.io.IOException io)
{
System.out.println("IOException");
}
}
個進口：
import static com.googlecode.javacv.jna.highgui.cvCreateCameraCapture;
import static com.googlecode.javacv.jna.highgui.cvGrabFrame;
import static com.googlecode.javacv.jna.highgui.cvReleaseCapture;
import com.googlecode.javacv.CanvasFrame;
import com.googlecode.javacv.FrameGrabber;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import com.colorfulwolf.webcamapplet.gui.LabelPanel;
import com.colorfulwolf.webcamapplet.gui.LoadingScreen;
import com.googlecode.javacv.jna.highgui.CvCapture;
import java.awt.BorderLayout;
import javax.media.*;
import javax.media.protocol.*;
import javax.media.util.BufferToImage;
import javax.swing.*;
import java.awt.*;
import java.util.*;
import javax.media.control.*;
import javax.media.format.*;
import com.sun.image.codec.jpeg.*;
您使用的是Eclipse嗎？前一段時間，我也有類似的東西，但那是一個Eclipse錯誤（在靛藍中，目前的版本Juno爲此得到了修復）。 – 11684
@ 11684我正在使用Eclipse Juno –
包含'com.sun.image.codec.jpeg'包的jar在哪裏？ – 11684