jetbrick-commons/src/main/java/jetbrick/lang/StringUtils.java
public static String defaultIfNull(final String s, final String defaultStr) {
        return s == null ? defaultStr : s;
    }
public static String defaultIfNull(final String s, final String defaultStr) {
        return s == null ? defaultStr : s;
    }
<p>
Returns either the passed in String, or if the String is {@code null},
the value of {@code defaultStr}.
</p>

<pre>
StringUtils.defaultIfNull(null, "NULL")  = "NULL"
StringUtils.defaultIfNull("", "NULL")    = ""
StringUtils.defaultIfNull("bat", "NULL") = "bat"
</pre>