How to convert java.io.InputStream to String

How to convert java.io.InputStream to String

While working on Files and FTP we come across some situations where we need to convert a java.io.InputStream to String. This can be easily achieved by using various techniques. Some of them are given below.


This example uses Apache IOUtils which can be downloaded from http://mvnrepository.com/artifact/commons-io/commons-io/2.5
To see How to convert InputStream to String using standard Java library CLICK HERE.


Suppose we have a file in D:/sample.txt

Method 1:

File: InputStreamToStringExample.java

import java.io.*;
import org.apache.commons.io.IOUtils;

public class InputStreamToStringExample {

 public static void main(String[] args) throws IOException {

  InputStream inputStream = new FileInputStream("D:\\sample.txt");
  String result = IOUtils.toString(inputStream, "UTF-8");
  System.out.println(result);
  
  IOUtils.closeQuietly(inputStream);
 }
}

Method 2:

File: InputStreamToStringExample.java

import java.io.*;
import org.apache.commons.io.IOUtils;

public class InputStreamToStringExample {

 public static void main(String[] args) throws IOException {

  InputStream inputStream = new FileInputStream("D:\\sample.txt");
  StringWriter stringWriter = new StringWriter();
  IOUtils.copy(inputStream, stringWriter, "UTF-8");
  
  String text = stringWriter.toString();
  System.out.println(text);
 }
}

Output:
This is an example.