我是初学者，当我部署testWeb是老是出现下列情况：

java.lang.reflect.UndeclaredThrowableException

$Proxy0.getAllUsers(Unknown Source)

com.jdon.framework.test.web.UserListAction.doPost(UserListAction.java:55)

com.jdon.framework.test.web.UserListAction.doGet(UserListAction.java:39)

javax.servlet.http.HttpServlet.service(HttpServlet.java:690)

javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:694)

org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:665)

org.apache.jsp.index_jsp._jspService(index_jsp.java:54)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)

javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

com.jdon.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:92)