I have a String[] array and I need to convert it to InputStream.
I've seen Byte[] -> InputStream and String -> InputStream, but not this. Any tips?
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1An InputStream of what? Delimited? Length-prefixed?SLaks– SLaks2013-09-22 23:30:15 +00:00Commented Sep 22, 2013 at 23:30
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1An InputStream is for binary, perhaps you wanted a Reader which is for text?Peter Lawrey– Peter Lawrey2013-09-22 23:31:41 +00:00Commented Sep 22, 2013 at 23:31
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Actually, either will do, but I arbitrarily chose to ask about InputStream.Walrus the Cat– Walrus the Cat2013-09-22 23:34:13 +00:00Commented Sep 22, 2013 at 23:34
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3 Answers
You can construct a merged String with some separator and then to byte[] and then to ByteArrayInputStream.
Here's a way to convert a String to InputStream in Java.
1 Comment
Walrus the Cat
Yeah... that's the way I was going to go... zip up an array of newlines with my string array and join to a string... but I was hoping there was a more direct route.
Have a look at the following link: http://www.mkyong.com/java/how-to-convert-string-to-inputstream-in-java/
However, the difference in the code is that you should concatenate all the strings together in one string before converting.
String concatenatedString = ... convert your array
// convert String into InputStream
InputStream is = new ByteArrayInputStream(str.getBytes());
// read it with BufferedReader
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String line;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
br.close();
Comments
There is still no single method call to do this but with Java 8 you can do it in a single line of code. Given an array of String objects:
String[] strings = {"string1", "string2", "string3"};
You can convert the String array to an InputStream using:
InputStream inputStream = new ByteArrayInputStream(String.join(System.lineSeparator(), Arrays.asList(strings)).getBytes(StandardCharsets.UTF_8));
