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java bufferedimage是什么，让我们一起了解一下？
BufferedImage是Image的一个子类，Image和BufferedImage的主要作用就是将一副图片加载到内存中。生成的图片在内存里有一个图像缓冲区，利用这个缓冲区我们可以很方便的操作这个图片，通常用来做图片修改操作如大小变换、图片变灰、设置图片透明或不透明等。
如果Java想将一副图片加载到内存中的方法是：BufferedImage bufferedImage = ImageIO.read(new FileInputStream(filePath));
那么如果想编写一个网络程序，通过Socket将图片从服务器端传到客户端，并存入文件系统，该如何操作？
示例如下：
Server端：package org.exam3;import java.awt.image.BufferedImage;import java.io.ByteArrayOutputStream;import java.io.DataOutputStream;import java.io.File;import java.net.ServerSocket;import java.net.Socket;import javax.imageio.ImageIO;public class T6Server { public static void main(String[] args) throws Exception { ServerSocket server = new ServerSocket(8888);Socket s = server.accept();DataOutputStream dout = new DataOutputStream(s.getOutputStream());BufferedImage image = ImageIO.read(new File("1.gif"));ByteArrayOutputStream out = new ByteArrayOutputStream();boolean flag = ImageIO.write(image, "gif", out);byte[] b = out.toByteArray();dout.write(b);s.close();}}Client端：package org.exam3;import java.awt.BorderLayout;import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.image.BufferedImage;import java.io.ByteArrayInputStream;import java.io.DataInputStream;import java.io.File;import java.io.PrintWriter;import java.net.Socket;import javax.imageio.ImageIO;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;public class T6Client extends JFrame {JButton button;MyPanel panel;public T6Client() {setSize(300, 400);button = new JButton("获取图像");add(button,BorderLayout.NORTH);button.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent event) {try {Socket s = new Socket("localhost",8888);PrintWriter out = new PrintWriter(s.getOutputStream());out.print("a");DataInputStream in = new DataInputStream(s.getInputStream());byte[]b = new byte[1000000];in.read(b);ByteArrayInputStream bin = new ByteArrayInputStream(b);BufferedImage image = ImageIO.read(bin);ImageIO.write(image, "gif", new File("2.gif"));s.close();} catch (Exception e) {}}});panel = new MyPanel();add(panel);}public static void main(String[] args) throws Exception {T6Client frame = new T6Client();frame.setDefaultCloseOperation(J
