ReplaceTag.java
package customaction;
import java.io.IOException;
import java.io.StringWriter;
import javax.servlet.jsp.JspContext;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.JspFragment;
import javax.servlet.jsp.tagext.SimpleTagSupport;
import org.apache.jasper.runtime.JspFragmentHelper;
public class ReplaceTag extends SimpleTagSupport {
private String oldWord;
private String newWord;
public void setOldWord(String oldWord) {
this.oldWord = oldWord;
}
public void setNewWord(String newWord) {
this.newWord = newWord;
}
@Override
public void doTag() throws JspException, IOException {
// TODO Auto-generated method stub
JspContext context = getJspContext();
JspWriter out = context.getOut();
JspFragment body = getJspBody();
StringWriter writer = new StringWriter();
body.invoke(writer);
String str = writer.toString();
String newStr = str.replace(oldWord, newWord);
out.println(newStr);
return;
}
}
customaction.tld
<?xml version="1.0" encoding="UTF-8" ?>
<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 http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">
<tlib-version>1.0</tlib-version>
<short-name>tool</short-name>
<tag>
<name>replace</name>
<tag-class>customaction.ReplaceTag</tag-class>
<body-content>scriptless</body-content>
<attribute>
<name>oldWord</name>
<type>java.lang.String</type>
</attribute>
<attribute>
<name>newWord</name>
<type>java.lang.String</type>
</attribute>
</tag>
</taglib>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="tool" uri="/taglibs/customaction.tld" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<tool:replace oldWord="비행기" newWord="제트기">
떴다 떴다 비행기 날아라 날아라 <br />
높이 높이 날아라 우리 비행기 <br />
</tool:replace>
</body>
</html>
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