Model to Json serializer JSP tag (by Eugene Dolganov)

example.jsp

<%@ taglib tagdir="/WEB-INF/tags/util" prefix="util" %>

<%-- tag should be placed to Web-inf/tags/util/toJson.tag --%>

<script id="scheduleData" type="json-data"><util:toJson source="${schedule}"/></script>

toJson.tag

<%@tag import="org.slf4j.LoggerFactory"%>
<%@tag import="org.codehaus.jackson.map.ObjectMapper"%>
<%@ tag trimDirectiveWhitespaces="true" display-name="Конвертирование объекта в JSON" pageEncoding="UTF-8" language="java" %>
<%@ attribute name="source" required="true" type="java.lang.Object"%>
<%@ attribute name="catchException" type="java.lang.Boolean"%>
<%
	String result = null;
	try {
		ObjectMapper mapper = new ObjectMapper();
		result = mapper.writeValueAsString(source);
	}catch(Exception e){
		if( ! Boolean.FALSE.equals(catchException)){
			LoggerFactory.getLogger("toJson.tag").error("can't convert to json", e);
		} else {
			throw e;
		}
	}
	if(result != null){
		jspContext.getOut().append(result);
	}
%>

Yep, it's my idea =)