Question

我是struts2的新手。在应用程序中有一个名为userLogin的Action。当我输入url http://servername:9090/appName/userLogin时，它应该将请求直接转发到/jsp/account/login.jsp。它不应该调用动作方法。我如何确保当请求通过获取然后forword到loginPage else如果请求是发布然后它应该调用操作

Struts.xml如下

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
   "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
   "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <constant name="struts.devMode" value="true" />
    <constant name="struts.custom.i18n.resources" value="ApplicationResources" />
    <package name="default" extends="struts-default">
        <action name="index">
            <result>jsp/index.jsp</result>
        </action>    

        <action name="userLogin" class="com.ril.tc.action.LoginAction">
            <result>jsp/account/login.jsp</result>
            <result name="success">jsp/index.jsp</result>
            <result name="error">jsp/account/login.jsp</result>
        </action>

        <action name="ministatement" class="com.ril.tc.action.MiniStatementAction">
            <result>jsp/account/ministatement.jsp</result>
            <result name="success">jsp/account/ministatementdetails.jsp</result>
            <result name="error">jsp/account/ministatement.jsp</result>
        </action>
    </package>
</struts>

Answer 1

<强> 1。您可以在业务方法执行之前简单地检查操作方法中的请求方法。

      It will add  2-3 lines of java code in action method and  a line modification in xml configuration.

<强> 2。或者，您可以使用拦截器严格限制Action方法的执行。

    Interceptor requires a seperate java class and a few lines of xml configuration.

方法1

a）Java代码

public String execute (){  // or your method name

     if(ServletActionContext.getRequest().getMethod().equals("GET")){

        return  "getrequest";
     }

........
//your business logic

}

b）xml配置

<action name="userLogin" class="com.ril.tc.action.LoginAction">
            <result name="getrequest">jsp/account/login.jsp</result>
            <result name="success">jsp/index.jsp</result>
            <result name="error">jsp/account/login.jsp</result>
        </action>

方法2。

a）Java代码

public GetRequestFilterInterceptor extends AbstractInterceptor{
  @Override
    public void intercept (ActionInvocation action){
            if(ServletActionContext.getRequest().getMethod(). equals("GET")){
                    return "getrequest";
            }else{
                    action.invoke();
            }

    }
}

b）Xml配置

<struts>
  <package name="default" extends="struts-default">
        <interceptors>

        <interceptor name="getUrlFilter" class="packagename.GetRequestFilterInterceptor"/>

                    <interceptor-stack  name="requestFilter">

                        <interceptor-ref  name="getUrlFilter"/>
                        <interceptor-ref name="defaultStack"/>  

                     </interceptor-stack>

        </interceptors>
     ......

        <action name="userLogin" class="com.ril.tc.action.LoginAction">

            <interceptor-ref  name="requestFilter"/>

            <result name="getrequest">jsp/account/login.jsp</result>
            <result name="success">jsp/index.jsp</result>
            <result name="error">jsp/account/login.jsp</result>
        </action>    

     </package>

</struts>

如果你想过滤很多方法，我建议你使用拦截器。如果您只想过滤一种方法，那么第一种方法就更好了。

在Struts中获取请求2

1 个答案: