I got the error "HtmlEncoderTag cannot be resolved to a type" on defining a custom tag?
I am defining a custom tag "htmlencoder". I have These files:
WEB-INF/classes/HtmlEncoderTag.jar ,with a java code like this:
import java.io.I开发者_JAVA百科OException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.BodyContent;
import javax.servlet.jsp.tagext.BodyTagSupport;
public class HtmlEncoderTag extends BodyTagSupport{
//....
}
WEB-INF/htmlencoder.tld :
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
<tlib-version>1.0</tlib-version>
<jsp-version>1.2</jsp-version>
<short-name></short-name>
<tag>
<name>htmlencode</name>
<tag-class>HtmlEncoderTag</tag-class>
<body-content>JSP</body-content>
</tag>
</taglib>
index.jsp:
<%@ taglib uri="WEB-INF/htmlencoder.tld" prefix="htmlencoder"%>
<head>
<title>Watch out you sinners...</title>
</head>
<html>
<body bgcolor="white">
<htmlencoder:htmlencode><script <% //the error refers to this line %>
type="javascript">BadStuff()</script></htmlencoder:htmlencode>
</body>
</html>
I got the error "HtmlEncoderTag cannot be resolved to a type" when i run my page and it shows me the line index.jsp:7 ( I mentioned above).
What should I do?
I found the answer. I'm not sure it is necessary, but my problem solved this way: You have to put your tag class in a package. for example, your HtmlEncoderTag.jar file should be placed in WEB-INF/MyTag/ and should be like this:
pckage MyTag;
import java.io.IOException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.BodyContent;
import javax.servlet.jsp.tagext.BodyTagSupport;
public class HtmlEncoderTag extends BodyTagSupport{
//....
}
And your tld file will be like this:
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
<tlib-version>1.0</tlib-version>
<jsp-version>1.2</jsp-version>
<short-name></short-name>
<tag>
<name>htmlencode</name>
<tag-class>MyTag.HtmlEncoderTag</tag-class>
<body-content>JSP</body-content>
</tag>
</taglib>
Two things:
- HtmlEncoderTag.jar should be in WEB-INF/lib, not WEB-INF/classes.
- Is HtmlEncoderTag in a package? None is shown in your Java code. However, if it is, the class name in the tag-class element needs to be fully qualified.
加载中,请稍侯......
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