java IO流拷贝图片

图片属于字节流，使用InputStream和OutputStream。

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyImage {

    public static void main(String[] args) throws IOException {

        File inFile = new File("F:\\1.jpg");
        File outFile = new File("D:\\1.jpg");

        FileInputStream in = new FileInputStream(inFile);
        FileOutputStream out = new FileOutputStream(outFile);
        byte[] buf = new byte[1024];
        int length = 0;

        //边读边写
        while ((length = in.read(buf)) != -1) {
            out.write(buf, 0, length);
        }

        out.close();
        in.close();
    }

}