IOUtils.java

public class IOUtils {
    public static String toString(InputStream input, String charset) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int n = 0;
        while ((n = input.read(buffer)) != -1) {
            output.write(buffer, 0, n);
        }
        return output.toString(charset);
    }
}