利用jquery的get方法，发送一个Struts2请求，报无法找到方法

js代码

java代码

错误信息
严重:
Servlet.service() for servlet [action] in context with path [/eimplat_pack] threw exception [java.lang.NoSuchMethodException: Action[/labelcp] does not contain specified method (check logs)] with root cause
java.lang.NoSuchMethodException: Action[/labelcp] does not contain specified method (check logs)