JSP-Fehler - illegal, um mehrere vorkommen von 'contentType' mit verschiedenen Werten

Arbeite ich auf der Netbeans-Freundliche tutorial auf dieser Seite mit Hilfe des Netbeans 7 IDE , Glassfish 3+ - server , der servlet-Klasse und session beans. Die servlet-Klasse wird voraussichtlich zum aufrufen der index.jsp-Klasse.

Aber jedes mal, wenn ich das Projekt in Netbeans bekomme ich eine Fehlermeldung.

dies ist der index.jsp-Seite.

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql"%>

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <link rel="stylesheet" type="text/css" href="css/affablebean.css">
    <title>The Affable Bean</title>
    </head>
    <body>

        <div id="indexLeftColumn">
                <div id="welcomeText">
                    <p style="font-size: larger">Welcome to the online home of the Affable Bean Green Grocer.</p>

                    <p>Enjoy browsing and learning more about our unique home delivery
                        service bringing you fresh organic produce, dairy, meats, breads
                        and other delicious and healthy items to your doorstep.</p>
                </div>
            </div>

            <div id="indexRightColumn">
                <c:forEach var="category" items="${categories}">
                    <div class="categoryBox">
                        <a href="category?${category.id}">
                            <span class="categoryLabel"></span>
                            <span class="categoryLabelText">${category.name}</span>

                            <img src="${initParam.categoryImagePath}${category.name}.jpg"
                                 alt="${category.name}" class="categoryImage">
                        </a>
                    </div>
                </c:forEach>
            </div>
    </body>
</html>

Hallo, ist die Fehlermeldung aus dem glassfish 3+ server

WARNING: StandardWrapperValve[jsp]: PWC1406: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: /index.jsp(9,0) PWC5988: Page directive: illegal to have multiple occurrences of 'contentType' with different values (old: text/html; charset=UTF-8, new: text/html)
    at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:81)
    at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:376)
    at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:204)
    at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:173)
    at org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:600)
    at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2297)
    at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2347)
    at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2353)
    at org.apache.jasper.compiler.Node$Root.accept(Node.java:499)
    at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2297)
    at org.apache.jasper.compiler.Validator.validate(Validator.java:1826)
    at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:223)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:625)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722)

WARNING: StandardWrapperValve[jsp]: PWC1406: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: /index.jsp(9,0) PWC5988: Page directive: illegal to have multiple occurrences of 'contentType' with different values (old: text/html; charset=UTF-8, new: text/html)
    at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:81)
    at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:376)
    at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:204)
    at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:173)
    at org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:600)
    at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2297)
    at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2347)
    at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2353)
    at org.apache.jasper.compiler.Node$Root.accept(Node.java:499)
    at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2297)
    at org.apache.jasper.compiler.Validator.validate(Validator.java:1826)
    at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:223)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:625)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722)

WARNING: StandardWrapperValve[jsp]: PWC1406: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: /index.jsp(9,0) PWC5988: Page directive: illegal to have multiple occurrences of 'contentType' with different values (old: text/html; charset=UTF-8, new: text/html)
    at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:81)
    at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:376)
    at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:204)
    at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:173)
    at org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:600)
    at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2297)
    at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2347)
    at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2353)
    at org.apache.jasper.compiler.Node$Root.accept(Node.java:499)
    at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2297)
    at org.apache.jasper.compiler.Validator.validate(Validator.java:1826)
    at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:223)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:625)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722)

Jeder Vorschlag wird geschätzt

Du hast geschrieben contentType Attribut zweimal.
das ist es, was der Fehler sagen, aber ich bin nicht in der Lage zu verfolgen, wurden die Inhalte geben wird zweimal angezeigt. Bin neu in JSP kann einer helfen

InformationsquelleAutor CodeAngel | 2013-07-22

2

Den content-header-Typ aussieht, set:
```
<%@page contentType="text/html" pageEncoding="UTF-8"%>
```
und
```
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
```
Ausnahme ausgelöst wird, weil das charset fehlt in der page-Direktive.
Das ist, warum es scheint, als eine andere contentType.

InformationsquelleAutor Guy Bouallet

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