Question

SEVERE：servlet调度程序的Servlet.service（）引发了异常 java.lang.IllegalStateException：BindingResult和bean名称'forum'的普通目标对象都不能作为请求属性使用在org.springframework.web.servlet.support.BindStatus。（BindStatus.java:141）在org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus（AbstractDataBoundFormElementTag.java:175） at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath（AbstractDataBoundFormElementTag.java:195）在org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName（AbstractDataBoundFormElementTag.java:161） at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.autogenerateId（AbstractDataBoundFormElementTag.java:148）在org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.resolveId（AbstractDataBoundFormElementTag.java:139）在org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes（AbstractDataBoundFormElementTag.java:123）在org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes（AbstractHtmlElementTag.java:380）在org.springframework.web.servlet.tags.form.InputTag.writeTagContent（InputTag.java:140）在org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal（AbstractFormTag.java:91）在org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag（RequestContextAwareTag.java:78） at org.apache.jsp.WEB_002dINF.jsp.ForumList_jsp._jspx_meth_form_005finput_005f0（ForumList_jsp.java:189） at org.apache.jsp.WEB_002dINF.jsp.ForumList_jsp._jspx_meth_form_005fform_005f0（ForumList_jsp.java:138）在org.apache.jsp.WEB_002dINF.jsp.ForumList_jsp._jspService（ForumList_jsp.java:94）在org.apache.jasper.runtime.HttpJspBase.service（HttpJspBase.java:70）在javax.servlet.http.HttpServlet.service（HttpServlet.java:717）在org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:377）在org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:313）在org.apache.jasper.servlet.JspServlet.service（JspServlet.java:260）在javax.servlet.http.HttpServlet.service（HttpServlet.java:717）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:290）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在org.apache.catalina.core.ApplicationDispatcher.invoke（ApplicationDispatcher.java:646）在org.apache.catalina.core.ApplicationDispatcher.processRequest（ApplicationDispatcher.java:436）在org.apache.catalina.core.ApplicationDispatcher.doForward（ApplicationDispatcher.java:374）在org.apache.catalina.core.ApplicationDispatcher.forward（ApplicationDispatcher.java:302）在org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel（InternalResourceView.java:239）在org.springframework.web.servlet.view.AbstractView.render（AbstractView.java:250）在org.springframework.web.servlet.DispatcherServlet.render（DispatcherServlet.java:1062）在org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:790）在org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:709）在org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:613）在org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:525）在javax.servlet.http.HttpServlet.service（HttpServlet.java:617）在javax.servlet.http.HttpServlet.service（HttpServlet.java:717）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:290）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:233） at org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:191）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:127） at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:102）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:109）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:298）在org.apache.coyote.http11.Http11Processor.process（Http11Processor.java:857）在org.apache.coyote.http11.Http11Protocol $ Http11ConnectionHandler.process（Http11Protocol.java:588）在org.apache.tomcat.util.net.JIoEndpoint $ Worker.run（JIoEndpoint.java:489）在java.lang.Thread.run（未知来源）

我无法在multiactioncontroller中绑定commandName becoz没有setCommandName和setCommandClass方法（methodSimpleFormController）

Answer 1

如果您延长request.getParameter("parameterName");，则只需MultiActionController即可。使用setCommand()扩展SimpleFormController

更新（有关getParameter（）方法的更多理解）：

假设你有一个这样的表格：

<form action="myController.html" method="post">
    Name : <input type="text" name="username" value="${param.username}" />
    <%--
       That ${param.username} will help pre-populating the value 
       of the text field with `username` parameter
    --%> 
</form>

在您的控制器方法中，检索提交的参数，如：

public ModelAndView myControllerMethod(HttpServletRequest request, HttpServletResponse response) {
    String username = request.getParameter("username");
}

如上所述，你不能使用扩展MultiActionController的bean，你需要单独为所有bean属性执行它。

我如何在spring中使用multiactioncontroller而不是simpleformcontroller获取表单值

1 个答案: