spring security找不到http://www.springframework.org/schema/security 命名空间
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/security"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security-2.0.4.xsd">
<http auto-config="true">
<intercept-url pattern="/admin.jsp" access="ROLE_ADMIN"/>
<intercept-url pattern="/**" access="ROLE_USER"/>
</http>
<authentication-provider>
<user-service>
<user name="admin" password="admin" authorities="ROLE_USER, ROLE_ADMIN" />
<user name="user" password="user" authorities="ROLE_USER" />
</user-service>
</authentication-provider>
</beans:beans>
报错:org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate NamespaceHandler for namespace [http://www.springframework.org/schema/security]
Offending resource: class path resource [applicationContext-scurity.xml]