cvc-complex-type.2.4.a: Invalid content was found starting with element 'async-supported'. 错误

cvc-complex-type.2.4.a: Invalid content was found starting with element 'async-supported'. One of 

 '{"http://Java.sun.com/xml/ns/javaee":init-param}' is expected.

web.xml总是报cvc-complex-type.2.4.a: Invalid content was found starting with element 'async-supported'. 错误, 解决办法为：将“http://www.springmodules.org/schema/cache/springmodules-cache.xsd http://www.springmodules.org/schema/cache/springmodules-ehcache.xsd” 这段话加入到xml文件"xmlns:xsi="的标签中，问题就解决了。