jsp之初学过滤器二---web.xml配置错误

错误信息如下：

cvc-complex-type.2.4.a: Invalid content was found starting with element 'body'. One of '{"http://
 java.sun.com/xml/ns/javaee":description, "http://java.sun.com/xml/ns/javaee":display-name, "http://
 java.sun.com/xml/ns/javaee":icon, "http://java.sun.com/xml/ns/javaee":filter-name}' is expected.