字节流--读取并复制图片

Posted 2021-02-04 czgxxwz

/**
 * 字节流--读取并复制图片
 * @param targetPath
 */
public static void readImageAndCopy(String targetPath){
    File file=new File("F:\CreateDemo\demo.jpg");
    FileInputStream fileInputStream=null;
    try{
        //输入流-读取文件
        fileInputStream=new FileInputStream(file);
        BufferedInputStream bufferedInputStream=new BufferedInputStream(fileInputStream);

        //输出流-写入文件
        FileOutputStream fileOutputStream=new FileOutputStream(targetPath);
        BufferedOutputStream bufferedOutputStream=new BufferedOutputStream(fileOutputStream);

        byte[] b=new byte[1024];
        int i=0;
        while ((i=bufferedInputStream.read(b))!=-1){
            bufferedOutputStream.write(b,0,i);
            System.out.println(i);
        }
        bufferedOutputStream.close();
        fileOutputStream.close();
        bufferedInputStream.close();
        fileInputStream.close();
    }catch (FileNotFoundException e){
        System.out.println("文件不存在");
        e.printStackTrace();
    }catch (IOException e){
        System.out.println("读取文件错误");
        e.printStackTrace();
    }
}