RTEditor/src/main/java/com/onegravity/rteditor/utils/io/IOUtils.java
public static void write(char[] data, OutputStream output, Charset encoding) throws IOException {
        if (data != null) {
            output.write(new String(data).getBytes(Charsets.toCharset(encoding)));
        }
    }
public static void write(char[] data, OutputStream output, Charset encoding) throws IOException {
        if (data != null) {
            output.write(new String(data).getBytes(Charsets.toCharset(encoding)));
        }
    }
Writes chars from a <code>char[]</code> to bytes on an
<code>OutputStream</code> using the specified character encoding.
<p/>
This method uses {@link String#String(char[])} and
{@link String#getBytes(String)}.

@param data     the char array to write, do not modify during output,
null ignored
@param output   the <code>OutputStream</code> to write to
@param encoding the encoding to use, null means platform default
@throws NullPointerException if output is null
@throws IOException          if an I/O error occurs
@since 2.3