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.
第一种方案: 将 "http://java.sun.com/xml/ns/javaee" 换为 "http://java.sun.com/xml/ns/j2ee"
错误,错误原因为 根元素<web-app>中的模式文件不对,javaee只支持单个的config,要换成 j2ee 经过测试,修改完还会报错。
第二种方案:直接将 xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 删除(或注释)
经测试,不再报错
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