spring页面转发和参数传递

    技术2022-05-11  12

    1.最简单的action页面提交和参数p的传递               < form:form name = " batchForm "  method = " post "  action = " /video/list.html " >         < input type = " hidden "  name = " p "  value = " <c:out value= " $ {videoList.p} " /> " /> // 从action取得p的值       </ form:form >        public  ModelAndView list(HttpServletRequest request,HttpServletResponse response)  {        int page = ServletRequestUtils.getIntParameter(request, "p"1);//通过超连接取得p的参数值        HashMap<String, Object> map = new HashMap<String, Object>();        map.put("p", page);        return new ModelAndView(listView, "videoList", map);     } 2.在javascript里面实现不同连接的表单提交   < form id = " messageForm "  name = " messageForm "  method = " post "  onSubmit = " return       onMessageFormSubmit(<c:out  value= " $ {param.type} " />) " >          < input type = " hidden "  name = " method "  value = " delete " />         < input type = " hidden "  name = " type "  value = " <c:out value= " $ {param.type} " /> "   />      </ form >      < script type = " text/javascript " >         function onMessageFormSubmit(type)  {            if(type == 0{                document.messageForm.action = '/commend/special/list.html';            }            if(type == 1){                document.messageForm.action = '/special/list.html';            }         }          Form.focusFirstElement($( ' messageForm ' ));   </ script > 3.通过编辑页面的提交给action="/special/edit.html"既对应的onsubmit方法返回给前一页面,注意删除按钮不应提交   < c:set var = " buttons " > < input type = " submit "   class = " button "  name = " audited "  onclick = " bCancel=false "  value = " <fmt:message key    = " button.audited " /> " /> < input type = " button class= " button "  οnclick= " location.href = ' /special/list.html?method=find&from=edit '"      value= " < fmt:message   key = " button.delete " /> " /> < input type = " submit "   class = " button "  name = " cancel "  onclick = " bCancel=true "  value = " <fmt:message      key= " button.back " /> " />   </ c:set >   < form:form commandName = " special "  method = " post "  action = " /special/edit.html "  id = " specialForm "   >      < input type = " hidden "  name = " type "  value = " <c:out value= " $ {param.type} "  /> "   />      < class = " buttonBar bottom " >          < c:out value = " ${buttons} "  escapeXml = " false "   />      </ p >    </ form:form > 4.jsp使用request.getAttribute()方法接收传递过来的special参数对象       public  ModelAndView find(HttpServletRequest request,            HttpServletResponse response)  {        if (log.isDebugEnabled()) {            log.debug("entering 'find' method...");        }        int specialId = ServletRequestUtils.getIntParameter(request,                "specialId"-1);        Special special = specialManager.findBySpecialId(specialId);        return new ModelAndView(findView, "special", special);  }      <%        if ( null   ==  request.getAttribute( " special " ) )         {    %>    <script type="text/javascript">    alert('<fmt:message key="special.status.conflict"/>');     location.href='/special/list.html?type=<%=ServletRequestUtils.getIntParameter(request, "type",0)%>     &p=<%=ServletRequestUtils.getIntParameter(request, "p", 1)%>';    </script>     <%             return ;    } %> 5.此时的param是有controller传递过来的参数别名,即spring自带的参数.     < form:form commandName = " special "   method = " post "  id = " specialForm "  name = " specialForm "      onsubmit = " return  validateSpecial(this) " >       < input type = " hidden "  name = " type "  value = " <c:out value= " $ {param.type} "  /> "   />        < input type = " hidden "  name = " p "  value = " <c:out value= " $ {param.p} "  /> "   /> </ form:form > 6.通过controller传递参数,得到hashMap所封装的对象.    public  ModelAndView list(HttpServletRequest req, HttpServletResponse res)  {    HashMap<String,Object> videoRelationsMap = new HashMap<String,Object>();        videoRelationsMap.put("video", video);       return new ModelAndView(view,"videoRelationsList",videoRelationsMap);} <%  Videos videos  =  (Videos)((HashMap)request.getAttribute( " videoRelationsList " )).get( " video " ); %>

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