tomcat错误提示如下: HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:248) root cause java.lang.NullPointerException org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:703) org.apache.struts2.components.UIBean.end(UIBean.java:450) org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:36) org.apache.jsp.SayHello_jsp._jspx_meth_s_textfield_0(SayHello_jsp.java:139) org.apache.jsp.SayHello_jsp._jspx_meth_s_form_0(SayHello_jsp.java:105) org.apache.jsp.SayHello_jsp._jspService(SayHello_jsp.java:68) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:248) note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs. --------------------------------------------------------------------------------Apache Tomcat/5.5.17
HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:248)
root cause java.lang.NullPointerException
org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:703)
org.apache.struts2.components.UIBean.end(UIBean.java:450)
org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:36)
org.apache.jsp.SayHello_jsp._jspx_meth_s_textfield_0(SayHello_jsp.java:139)
org.apache.jsp.SayHello_jsp._jspx_meth_s_form_0(SayHello_jsp.java:105)
org.apache.jsp.SayHello_jsp._jspService(SayHello_jsp.java:68)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:248)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.
--------------------------------------------------------------------------------Apache Tomcat/5.5.17
"而直接在浏览器中直接输入同目录下的HelloWorld却能运行"回楼上,配置文件的action定无问题.
这个property属性
value的值没有
则抛出500错误