public static Map<String, Object> getParametersStartingWith(ServletRequest request, String prefix) {
		Assert.notNull(request, "Request must not be null");
		Enumeration<String> paramNames = request.getParameterNames();
		Map<String, Object> params = new TreeMap<String, Object>();
		if (prefix == null) {
			prefix = "";
		}
		while (paramNames != null && paramNames.hasMoreElements()) {
			String paramName = paramNames.nextElement();
			if ("".equals(prefix) || paramName.startsWith(prefix)) {
				String unprefixed = paramName.substring(prefix.length());
				String[] values = request.getParameterValues(paramName);
				if (values == null || values.length == 0) {
					// Do nothing, no values found at all.
				}
				else if (values.length > 1) {
					params.put(unprefixed, values);
				}
				else {
					params.put(unprefixed, values[0]);
				}
			}
		}
		return params;
	}