報錯內容如下：

Multiple annotations found at this line:
    - cvc-complex-type.2.4.a: Invalid content was found starting with element 'bean'. One of '{"http://xmlns.jcp.org/xml/ns/javaee":interceptors, "http://xmlns.jcp.org/
     xml/ns/javaee":decorators, "http://xmlns.jcp.org/xml/ns/javaee":alternatives, "http://xmlns.jcp.org/xml/ns/javaee":scan, "http://xmlns.jcp.org/xml/ns/javaee":trim}' is 

解決方法：

<?xml version="1.0"?>
<beans bean-discovery-mode="annotated" version="2.0"
 xmlns="http://xmlns.jcp.org/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_2_0.xsd" />
將 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 中的www刪除，然後儲存就可以了

最後說一句，這個錯真的是奇葩，找好久，還以為是dtd的問題。。。