javax.servlet.ServletException: Request[/usergetinfo] does not contain handler parameter named 'para

错误介绍：1：找不到配置的(DispatchAction)方法参数，或者其他参数。  eg：parameter=“method”；

                   2：过滤器中“ chain.doFilter(request,response);”传递不了下一个过滤器中或者，进入请求中。

异常详细信息：

2015-01-16 17:18:02,424 ERROR org.apache.struts.actions.DispatchAction Request[/usergetinfo] does not contain handler parameter named 'param'.  This may be caused by whitespace in the label text.
2015-1-16 17:18:02 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet action threw exception
javax.servlet.ServletException: Request[/usergetinfo] does not contain handler parameter named 'param'.  This may be caused by whitespace in the label text.
	at org.apache.struts.actions.DispatchAction.unspecified(DispatchAction.java:215)
	at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:249)
	at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.ts.filter.EncodingFilter.doFilter(EncodingFilter.java:79)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
	at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:852)
	at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:584)
	at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1508)
	at java.lang.Thread.run(Thread.java:619)

原因分析：

1：jsp中<form action="usergetinfo.do?param=getHtmlUserInfo">这种传递参数不能成功。
2：js中userForm.action = path+"/usergetinfo.do?param=getHtmlUserInfo";
       userForm.method = "get";
       userForm.submit();这种传递参数不能成功。

解决办法：

1:post：

<form action="usergetinfo.do?param=getHtmlUserInfo" method="post">...

  get：

<form action="usergetinfo.do" method="get">
 <input type="hidden" id="param" name="param" value="getHtmlUserInfo" />...

2:如果js(get)提交,在jsp的form表单中添加：

<!--jsp-->
<input type="hidden" id="param" name="param" value="getHtmlUserInfo" />
//js
  userForm.action = path+"/usergetinfo.do";
  userForm.method = "get";
  userForm.submit();

3:如果js(post)提交，不用隐藏域，直接写：

  var userForm = $("#userform").get(0);
  userForm.action = path+"/usergetinfo.do?param=getHtmlUserInfo";//或者userForm.action = "usergetinfo.do?param=getHtmlUserInfo";
  userForm.method = "post";
  userForm.submit()

注：如果，用get方式提交，<form>下submit，还是js提交，都要在form表单中添加，一个method parameter的隐藏域提交。

注：如果request找不到路径可添加：

<!--jsp-->
<input id="contextPath" type="hidden" value="${pageContext.request.contextPath }" />
//js
var path = $("#contextPath").val();