Question

我有一个ByteArrayInputStream形式的图像。我想采取这种做法，并将其保存到我的文件系统中的某个位置。

我一直在四处走动，你能不能帮助我。

Answer 1

如果您已经在使用Apache commons-io，则可以使用：

 IOUtils.copy(byteArrayInputStream, new FileOutputStream(outputFileName));

Answer 2

InputStream in = //your ByteArrayInputStream here
OutputStream out = new FileOutputStream("filename.jpg");

// Transfer bytes from in to out
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0) {
    out.write(buf, 0, len);
}
in.close();
out.close();

Answer 3

您可以使用以下代码：

ByteArrayInputStream input = getInputStream();
FileOutputStream output = new FileOutputStream(outputFilename);

int DEFAULT_BUFFER_SIZE = 1024;
byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
long count = 0;
int n = 0;

n = input.read(buffer, 0, DEFAULT_BUFFER_SIZE);

while (n >= 0) {
   output.write(buffer, 0, n);
   n = input.read(buffer, 0, DEFAULT_BUFFER_SIZE);
}

Answer 4

    ByteArrayInputStream stream  = <<Assign stream>>;
    byte[] bytes = new byte[1024];
    stream.read(bytes);
    BufferedWriter writer = new BufferedWriter(new FileWriter(new File("FileLocation")));
    writer.write(new String(bytes));
    writer.close();

与FileWriter相比，

Buffered Writer将提高写入文件的性能。

如何获取ByteArrayInputStream并将其内容保存为文件系统上的文件

4 个答案: