Custom Tag

함수 호출순서
doStartTag() -> { setBodyContent() -> doInitBody() -> doAfterBody() } -> doEndTag() -> release()

로직이 들어가는 자바 클래스
package benitware.sample.test; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.TagSupport; @SuppressWarnings("serial") public class CustomTagEx extends TagSupport { private Long value; public void setValue(Long value) { this.value = value; } @Override public int doStartTag() throws JspException { try { JspWriter out = pageContext.getOut(); String changedValue = ""; if((value/1000000000)>0){ changedValue = value/1000000000 + " GB"; } else if((value/1000000)>0){ changedValue = value/1000000 + " MB"; } else if((value/1000)>0){ changedValue = value / 1000 + " kB"; } else { changedValue = value + " byte"; } out.print(" 입력받은 값은 " + changedValue + " 입니다."); } catch (Exception e) { e.printStackTrace(); } return SKIP_BODY; } }

/WEB-INF/tlds/tazz009.tld

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE tablib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN" "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd"> <taglib> <tlibversion>1.0</tlibversion> <jspversion>1.2</jspversion> <shortname>tazz009</shortname> <!-- tag name과 무관 --> <tag> <name>size</name> <!-- jsp에서 사용할 태그 이 --> <tagclass>benitware.sample.test.CustomTagEx</tagclass> <attribute> <name>value</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> </tag> </taglib>

사용방법
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ include file="/WEB-INF/jsp/common/include/taglib.jsp"%> <%@ taglib prefix="tazz" uri="/WEB-INF/tlds/tazz009.tld" %> <tazz:size value="10000000"></tazz:size>