Codigo fonte da tag <jsp:include>

public class IncludeTag implements Tag {

	private PageContext pageContext	= null;
	private Tag parent = null;

	private String page = null;

	public IncludeTag() {
		super();
	}

	public void setPage(String page) {
		this.page = page;
	}

	public int doEndTag() throws JspTagException {
		try {
			pageContext.include(page);
		} catch (Exception e) {
			throw new JspTagException(e.getMessage(), e);
		}
		return EVAL_PAGE;
	}

	public int doStartTag() throws JspTagException {
		return SKIP_BODY;
	}

	public void release() {
	}

	public void setPageContext(final PageContext pageContext) {
		this.pageContext = pageContext;
	}

	public javax.servlet.jsp.tagext.Tag getParent() {
		return parent;
	}

	public void setParent(final Tag parent) {
		this.parent = parent;
	}

}