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Forum:
JSP
make Simple Tag with attribute
Petar Thomas
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Posts: 234
posted 13 years ago
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This is what I have:
jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="mmm" uri="fx" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title></title> </head> <body> <%getServletContext().setAttribute("test", "anything");%> <c:if test="${not empty test }"> <mmm:sat movieList="${test}" /> </c:if> </body> </html>
tld
<?xml version="1.0" encoding="ISO-8859-1"?> <taglib xsi:schemaLocation='"http://java.sun.com/xml/ns/j2ee/webjsptaglibrary_2_0.xsd"' xmlns:xsi='"http://www.w3.org/2001/XMLNSchema-instance"' xmlns='"http://java.sun.com/xml/ns/j2ee"' version='"2.0"'> <tlib-version>1.2</tlib-version> <short-name>fx</short-name> <uri>fx</uri> <tag> <name>sat</name> <tag-class>src.customtags.SimpleAttributeTag</tag-class> <body-content>empty</body-content> <attribute> <name>movieList</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> </tag> </taglib>
tag handler class
package src.customtags; import java.io.*; import javax.servlet.jsp.*; import javax.servlet.jsp.tagext.*; public class SimpleAttributeTag extends SimpleTagSupport{ public String movieList; public String getMovieList() { return movieList; } public void setMovieList(String movieList) { this.movieList = movieList; } public void doTag() throws JspException, IOException{ getJspContext().getOut().write(movieList); } }
output
HTTP Status 500 - -------------------------------------------------------------------------------- type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: Unable to compile class for JSP org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:597) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) root cause java.lang.NumberFormatException: For input string: ""2.0"" sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source) java.lang.Double.parseDouble(Unknown Source) org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:1055) org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:846) org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1530) org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361) org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411) org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:865) org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1530) org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361) org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411) org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417) org.apache.jasper.compiler.Node$Root.accept(Node.java:495) org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361) org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1763) org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198) org.apache.jasper.compiler.Compiler.compile(Compiler.java:347) org.apache.jasper.compiler.Compiler.compile(Compiler.java:327) org.apache.jasper.compiler.Compiler.compile(Compiler.java:314) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:589) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
Bear Bibeault
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posted 13 years ago
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What's with the double quoting in the TLD file? That's what's causing the syntax failures. It has nothing at all to do with your tag.
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Petar Thomas
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Posts: 234
posted 13 years ago
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Double qouting. I feel like crying.
[edit 1,2] I am
[end edit]
Hey, Thank You
[edit2]
I don't know from where are the double quotes.... It was not my conscious decision.
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