问题：
使用jersey+spring构建RESTful服务，并将应用部署在不能连接外网的服务器上。部署时，报错信息如下，
1WARNING: Ignored XML validation warning 2org.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>. 3 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195) 4 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.warning(ErrorHandlerWrapper.java:96) 5... 6 7 8 9SEVERE: Context initialization failed 10org.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'. 11 at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:396) 12 at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334) 13 at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302) 14...
也就是，找不到如下的元素的声明
<aop:aspectj-autoproxy />
解决：
通过去除spring配置文件中schemaLocation的版本号（如2.0，3.0），让spring自己匹配版本。通常情况下，都是因为所依赖的spring版本号低于配置文件中指定的版本号。修改后如下
1<beans xmlns="http://www.springframework.org/schema/beans" 2 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 3 xmlns:context="http://www.springframework.org/schema/context" 4 xmlns:aop="http://www.springframework.org/schema/aop" 5 xsi:schemaLocation="http://www.springframework.org/schema/beans 6 http://www.springframework.org/schema/beans/spring-beans.xsd 7 http://www.springframework.org/schema/context 8 http://www.springframework.org/schema/context/spring-context.xsd 9 http://www.springframework.org/schema/aop 10 http://www.springframework.org/schema/aop/spring-aop.xsd">
如果希望保留spring配置文件中的schema版本号，而所依赖spring版本号不小于配置文件对应版本号，那么问题很有可能出在依赖其他库时没有去除这些库对于spring的依赖（通常它们会依赖于低版本的spring，从而导致整个项目的spring版本出问题）。可以通过在pom.xml中，对于这些库，剔除spring依赖。例如我使用的jersey-spring，则修改pom.xml后如下，
1<dependency> 2 <groupId>com.sun.jersey.contribs</groupId> 3 <artifactId>jersey-spring</artifactId> 4 <version>1.17.1</version> 5 <exclusions> 6 <exclusion> 7 <groupId>org.springframework</groupId> 8 <artifactId>spring</artifactId> 9 </exclusion> 10 <exclusion> 11 <groupId>org.springframework</groupId> 12 <artifactId>spring-core</artifactId> 13 </exclusion> 14 <exclusion> 15 <groupId>org.springframework</groupId> 16 <artifactId>spring-web</artifactId> 17 </exclusion> 18 <exclusion> 19 <groupId>org.springframework</groupId> 20 <artifactId>spring-beans</artifactId> 21 </exclusion> 22 <exclusion> 23 <groupId>org.springframework</groupId> 24 <artifactId>spring-context</artifactId> 25 </exclusion> 26 <exclusion> 27 <groupId>org.springframework</groupId> 28 <artifactId>spring-aop</artifactId> 29 </exclusion> 30 </exclusions> 31 </dependency>