Question

如何在特定目录中保存图像？

private void saveImage(String imageUrl, String destinationFile) throws Exception
{

    URL url = new URL(imageUrl);
    InputStream is = url.openStream();
    OutputStream os = new FileOutputStream(destinationFile);

    byte[] b = new byte[2048];
    int length;

    while ((length = is.read(b)) != -1) {
        os.write(b, 0, length);
    }

    is.close();
    os.close();

}

上述代码无法正常运行。任何建议。？

Answer 1

试试这个：

private void saveImage(String imageUrl, String destinationFile) throws Exception
{
    URL url = new URL(imageUrl);
    InputStream is = url.openStream();
    BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(destinationFile)));

    byte[] b = new byte[2048];
    int length;

    while ((length = is.read(b)) != -1) 
    {
        bos.write(b, 0, length);
    }

    is.close();
    os.close();
}

Answer 2

在destinationFile本身中指定目录（由saveImage的调用者指定），或者将其添加到saveImage中：

File outFile = new File(myDirectory, destinationFile);
OutputStream os = new FileOutputStream(outFile);

Answer 3

只需替换当前

的第4行

OutputStream os = new FileOutputStream(destinationFile);

使用以下行，所有其他行应保持不变

OutputStream os = new FileOutputStream(new File(destinationFile));

如何在java中的特定文件夹上保存图像

3 个答案: