如何在 Java 中将 InputStream 读取/转换为字符串? [英] How do I read / convert an InputStream into a String in Java?
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问题描述
If you have a java.io.InputStream
object, how should you process that object and produce a String
?
Suppose I have an InputStream
that contains text data, and I want to convert it to a String
, so for example I can write that to a log file.
What is the easiest way to take the InputStream
and convert it to a String
?
public String convertStreamToString(InputStream is) {
// ???
}
解决方案
A nice way to do this is using Apache commons IOUtils
to copy the InputStream
into a StringWriter
... something like
StringWriter writer = new StringWriter();
IOUtils.copy(inputStream, writer, encoding);
String theString = writer.toString();
or even
// NB: does not close inputStream, you'll have to use try-with-resources for that
String theString = IOUtils.toString(inputStream, encoding);
Alternatively, you could use ByteArrayOutputStream
if you don't want to mix your Streams and Writers
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