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spring maven项目打包为可执行jar包
用assembly打包一直报错：
shangyanshuodeMacBook-Pro:target shangyanshuo$ java -jar jobscrawler-1.0-SNAPSHOT-jar-with-dependencies.jar 17-04-30 15:52:43,337 INFO org.springframework.context.support.ClassPathXmlApplicationContext(AbstractApplicationContext.java:495) ## Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@22927a81: startup date [Sun Apr 30 15:52:43 CST 2017]; root of context hierarchy 17-04-30 15:52:43,489 INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader(XmlBeanDefinitionReader.java:315) ## Loading XML bean definitions from class path resource [spring/applicationContext-myBatis.xml] 17-04-30 15:52:47,269 INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader(XmlBeanDefinitionReader.java:315) ## Loading XML bean definitions from class path resource [spring/applicationContext.xml] Exception in thread "main" org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/context] Offending resource: class path resource [spring/applicationContext.xml] at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68) at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85) at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:80) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.error(BeanDefinitionParserDelegate.java:316) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1416) at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1409) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:184) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:140) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:111) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:243) at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127) at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:131) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:522) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:436) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83) at com.jobscrawler.crawlers.ShhCrawler.main(ShhCrawler.java:48)
网上看了一篇文章介绍说这是assembly打包spring项目的一个bug。参见（http://www.cnblogs.com/liqiu/p/4508848.html）
据说原因是spring的多个jar包中都含有spring.handlers和spring.schemas文件，而assembly只会把第一次遇到的文件打入jar包，后面遇到的都会skip掉。
解决方法就是放弃assembly，使用shade插件来打包.在shade的打包配制中指明spring.handlers和spring.schemas文件会以append方式加入进来，从而确保其他spring的jar中的这两个文件的信息不会被遗漏。
下面是一个非常简单的例子，只有四个文件的Maven工程，代码再附件内：
spring maven项目打包为可执行jar包
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