Get an OutputStream into a String
This worked nicely
OutputStream output = new OutputStream() {
private StringBuilder string = new StringBuilder();
@Override
public void write(int b) throws IOException {
this.string.append((char) b );
}
//Netbeans IDE automatically overrides this toString()
public String toString() {
return this.string.toString();
}
};
method call =>> marshaller.marshal( (Object) toWrite , (OutputStream) output);
then to print the string or get it just reference the "output" stream itself
As an example, to print the string out to console =>> System.out.println(output);
FYI: my method call marshaller.marshal(Object,Outputstream)
is for working with XML. It is irrelevant to this topic.
This is highly wasteful for productional use, there is a way too many conversion and it is a bit loose. This was just coded to prove to you that it is totally possible to create a custom OuputStream and output a string. But just go Horcrux7 way and all is good with merely two method calls.
And the world lives on another day....
I would use a ByteArrayOutputStream
. And on finish you can call:
new String( baos.toByteArray(), codepage );
or better:
baos.toString( codepage );
For the String
constructor, the codepage
can be a String
or an instance of java.nio.charset.Charset. A possible value is java.nio.charset.StandardCharsets.UTF_8.
The method toString()
accepts only a String
as a codepage
parameter (stand Java 8).
I like the Apache Commons IO library. Take a look at its version of ByteArrayOutputStream, which has a toString(String enc)
method as well as toByteArray()
. Using existing and trusted components like the Commons project lets your code be smaller and easier to extend and repurpose.
Here's what I ended up doing:
Obj.writeToStream(toWrite, os);
try {
String out = new String(os.toByteArray(), "UTF-8");
assertTrue(out.contains("testString"));
} catch (UnsupportedEncondingException e) {
fail("Caught exception: " + e.getMessage());
}
Where os is a ByteArrayOutputStream
.