Convert InputStream to String in Java
String is a sequence of characters used to hold data like "Halo World!". A Stream is an i/o class that is used to read and write bytes of data as a continuous sequence of bytes. In some situations we need to convert streams to string . The following 2 examples show how to convert an InputStream to a String.Using Scanner Class:
import java.io.*;
import java.util.*;
public class TestClass{
public static void main(String[] args) {
try {
FileInputStream fis = new FileInputStream("in.txt");
String str = new Scanner(fis,"UTF-8").useDelimiter("\\A").next();
System.out.println(str);
} catch (Exception e) {
System.err.println(e);
}
}
}
Using BufferedInputStream and ByteArrayOutputStream
import java.io.*;
import java.util.*;
public class TestClass{
public static void main(String[] args) {
try {
FileInputStream fis = new FileInputStream("in.txt");
BufferedInputStream bStream = new BufferedInputStream(fis);
ByteArrayOutputStream baous = new ByteArrayOutputStream();
int temp = bStream.read();
while(temp != -1) {
baous.write((byte) temp);
temp = bStream.read();
}
String str = baous.toString("UTF-8");
System.out.println(str);
}catch (IOException e) {
System.err.println(e);
}
}
}
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