Spring AOP schema找不到報錯

問題：

使用jersey+spring構建RESTful服務，並將應用部署在不能鏈接外網的服務器上。部署時，報錯信息以下，

WARNING: Ignored XML validation warning 
org.xml.sax.SAXParseException: schema_reference.4: Failed to read schema document 'http://www.springframework.org/schema/aop/spring-aop-3.0.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>. 
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195) 
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.warning(ErrorHandlerWrapper.java:96) 
...

SEVERE: Context initialization failed 
org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 16 in XML document from class path resource [cn/edu/seu/herald/ws/applicationContext.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 'aop:aspectj-autoproxy'. 
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:396) 
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334) 
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302) 
...

也就是，找不到以下的元素的聲明

<aop:aspectj-autoproxy />

解決：

經過去除spring配置文件中schemaLocation的版本號（如2.0，3.0），讓spring本身匹配版本。一般狀況下，都是由於所依賴的spring版本號低於配置文件中指定的版本號。修改後以下

<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" 
       xmlns:aop="http://www.springframework.org/schema/aop" 
       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 
    http://www.springframework.org/schema/aop 
    http://www.springframework.org/schema/aop/spring-aop.xsd">

若是但願保留spring配置文件中的schema版本號，而所依賴spring版本號不小於配置文件對應版本號，那麼問題頗有可能出在依賴其餘庫時沒有去除這些庫對於spring的依賴（一般它們會依賴於低版本的spring，從而致使整個項目的spring版本出問題）。能夠經過在pom.xml中，對於這些庫，剔除spring依賴。例如我使用的jersey-spring，則修改pom.xml後以下，

<dependency> 
            <groupId>com.sun.jersey.contribs</groupId> 
            <artifactId>jersey-spring</artifactId> 
            <version>1.17.1</version> 
            <exclusions> 
                <exclusion> 
                    <groupId>org.springframework</groupId> 
                    <artifactId>spring</artifactId> 
                </exclusion> 
                <exclusion> 
                    <groupId>org.springframework</groupId> 
                    <artifactId>spring-core</artifactId> 
                </exclusion> 
                <exclusion> 
                    <groupId>org.springframework</groupId> 
                    <artifactId>spring-web</artifactId> 
                </exclusion> 
                <exclusion> 
                    <groupId>org.springframework</groupId> 
                    <artifactId>spring-beans</artifactId> 
                </exclusion> 
                <exclusion> 
                    <groupId>org.springframework</groupId> 
                    <artifactId>spring-context</artifactId> 
                </exclusion> 
                <exclusion> 
                    <groupId>org.springframework</groupId> 
                    <artifactId>spring-aop</artifactId> 
                </exclusion> 
            </exclusions> 
        </dependency>