java 图片 bytearrayinputstream_Java 图片处理 以及如何将字节数组byte[] 转化为Inputstream...

01    import javax.imageio.*;//for ImageIO.read

02    import java.awt.*;//for JFrame and JLabel etc

03    import javax.swing.*;//for JFrame and JLabel etc

04    import java.net.*;//for URL

05    import java.io.*;//for catch (IOException e),File,InputStream, BufferedInputStream,and FileInputStream ect

06    public class HelloJava{

07       public static void main (String[] args){

08       Image image = null;

09        try {

10            // Read from a file

11            File sourceimage = new File("source.gif");  //source.gif图片要与HelloJava.java同在一目录下

12            image = ImageIO.read(sourceimage);

13

14            // Read from an input stream

15            InputStream is = new BufferedInputStream(

16               new FileInputStream("mid.jpg"));  //mid.jpg图片要与HelloJava.java同在一目录下

17            image = ImageIO.read(is);

18

19            // Read from a URL

20            URL url = new URL("http://www.javaworld.com/images/012407-tipsbox.jpg");

21            image = ImageIO.read(url);

22        } catch (IOException e) {

23        }

24

25        // Use a label to display the image

26        JFrame frame = new JFrame();

27        JLabel label = new JLabel(new ImageIcon(image));

28        frame.getContentPane().add(label, BorderLayout.CENTER);

29        frame.pack();

30        frame.setVisible(true);

31        //关闭窗口--退出调试

32         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

33         }

34    }