没有声明可以找到元素的上下文：组件扫描' [英] No declaration can be found for element 'context:component-scan'

问题描述

我从Spring 3（3.1.2）和Google App Engine开始。

我在网上跟着一个tutoria，现在，我有我的bean -realted xml在启动时出现问题。

这是代码

 <？xml version =1.0encoding =UTF-8？> 
< beans xmlns =http://www.springframework.org/schema/beans
 xmlns：xsi =http://www.w3.org/2001/XMLSchema-instance
 xmlns：context =http://www.springframework.org/schema/context
 xsi：schemaLocation =http://www.springframework.org/schema/beans 
 http： //www.springframework.org/schema/beans/spring-beans.xsd 
 http://www.springframework.org/schema/context/ 
 http://www.springframework.org/schema /context/spring-context.xsd\"> 
< context：component-scan base-package =my.example> 
  

其中所有java文件的根包是my.example。子包装也是模型和控制器的子包装。
now。

当我启动应用程序时，我收到以下错误消息：

  org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException：来自ServletContext资源的XML文档中的第10行[/WEB-INF/spring-servlet.xml]无效;嵌套异常是org.xml.sax.SAXParseException：cvc-complex-type.2.4.c：匹配的通配符是严格的，但是对于元素'context：component-scan'没有声明。 
  

有很多堆栈跟踪。

有人知道我可以解决这个问题吗？
我检查了XSD，他们似乎是正确的。

解决方案

替换

  http://www.springframework.org/schema/context/spring-context.xsd 
  

by

  http://www.springframework.org/schema/context/spring-context-2.5.xsd 
  

这应该够了吧！我使用的是spring-context 3.1.1，我得到的错误指的是 http://www.springframework.org/schema/context/spring-context-2.1.xsd

然而，你也应该做一个maven树依赖性，并检查你是否有不同的春季版本。这个错误也可能是由于这个事实......

i'm starting with Spring 3 (3.1.2) and Google App Engine.

I've followed a tutoria online, now, i've my bean-realted xml which has a problem while starting.

this is the code

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context/
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="my.example">

where the root package of all the java file is "my.example". The subpackage are "model" and "controller" with subpackages as well. now.

when i start the app i receive back this error:

org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 10 in XML document from ServletContext resource [/WEB-INF/spring-servlet.xml] is invalid; nested exception is org.xml.sax.SAXParseException: cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'context:component-scan'.

with a lot of more stacktrace.

does anyone know how i can solve this? i checked the XSD and they seems to be correct.

解决方案

Problem is incompatible schema locations with your spring-context dependencies.

Replace

http://www.springframework.org/schema/context/spring-context.xsd

by

http://www.springframework.org/schema/context/spring-context-2.5.xsd

That should do the trick! I was using spring-context 3.1.1 and I was getting the same error referring to http://www.springframework.org/schema/context/spring-context-2.1.xsd

However, you should also do a maven tree dependendency and check if you've got different spring versions. This error could be due to this fact also...

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