JAVA

[Java] CustomTag.2 속성이 있는 커스텀태그.

tenn 2012. 5. 29. 18:39

커스텀 태그 만들기


1. 라이브러리 임포트



jsp-api.jar



2. Tag Servlet 작성


package tags;


import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

public class helloTagServlet implements Tag {
  private PageContext pageContext;
  private Tag parentTag;
  private String name;

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

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

  public Tag getParent() {
    return this.parentTag;
  }

  public void setName(String name){
     this.name = name;
  }

  public int doStartTag() throws JspException {
    try {
      JspWriter out = pageContext.getOut();

      out.print("Hello World!");
      out.println("name : "+this.name);

    } catch(Exception e) {
      throw new JspException(e.getMessage());
    }
      return SKIP_BODY;
    }

    public int doEndTag() throws JspException {
      return EVAL_PAGE;
    }

  public void release() {}
}


3. tld 작성


<?xml version="1.0" ?>

<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
            web-jsptaglibrary_2_0.xsd"
        version="2.0">

  <tlib-version>1.0</tlib-version>
  <jsp-version>2.0</jsp-version>
  <short-name>helloTag</short-name>
  <tag>
    <name>helloTag</name>
    <tag-class>tags.helloTagServlet</tag-class>
    <body-content>empty</body-content>
<attribute>
<name>name</name>
<type>java.lang.String</type>
<rtexprvalue>true</rtexprvalue>  <- EL식, servlet식을 사용해서 값 설정 가능.
</attribute>
  </tag>
</taglib>

4. web.xml에 추가


<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
             web-app_2_4.xsd"
         version="2.4">
  <jsp-config>
    <taglib>
      <taglib-uri>tags/hello</taglib-uri>
      <taglib-location>/WEB-INF/lib/hello.tld</taglib-location>
    </taglib>
  </jsp-config>
</web-app>


5. jsp에 사용


//uri web.xml에서 설정한 <taglib-uri>의 값을 설정



<%@ page contentType="text/html; charset=windows-31j"

         import="tags.*" %>


<%@ taglib uri=" tags/hello "

    prefix="hello" %>


<HTML>

<BODY>


<hello:helloTag name="hello"/>






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