如何用java复制文件中的图片

    public static void main(String[] args){String src="这里放你要复制的图片的地址，记得在后面加.jpg";//否则可能会报拒绝访问或者无权限String target="这里放你要复制到的文件的地址，同样，也要加.jpg";copyFile(src,target);}public static void copyFile(String src,String target){//首先需要确定两个源File srcFile = new File(src);File targetFile = new File(target);try {//选择两个流InputStream in = new FileInputStream(srcFile);OutputStream out = new FileOutputStream(targetFile);//操作流byte[] bytes = new byte[1024];int len = -1;while((len=in.read(bytes))!=-1){out.write(bytes, 0, len);}//关闭流in.close();out.close();} catch (IOException e) {e.printStackTrace();}System.out.println("文件复制成功");}

如何用java从网站链接中复制图片到文件中

    public static void main(String[] args) {// 声明stream输入输出类OutputStream os = null;InputStream is = null;try {// 生成URL类并建立连接URL url = new URL("链接地址");URLConnection conn = url.openConnection();is = conn.getInputStream();// 准备输出文件，开始读写File f = new File("io.jpg");os = new FileOutputStream(f);byte[] b = new byte[1024];int len = 0;while((len = is.read(b))!= -1) {os.write(b, 0 ,len);}os.close();is.close();//最后记得关闭} catch (IOException e) {e.printStackTrace();}}