<servlet-mapping>
    <servlet-name>aaa</servlet-name>
    <url-pattern>/aaa</url-pattern>
    <servlet-name>curve</servlet-name>
    <url-pattern>/curve</url-pattern>
</servlet-mapping>
不能这样写,每个servlet都对应一个servlet-mapping,改成
<servlet-mapping>
    <servlet-name>aaa</servlet-name>
    <url-pattern>/aaa</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>curve</servlet-name>
    <url-pattern>/curve</url-pattern>
</servlet-mapping>