这里我已经包含了一个用于登录目的的拦截器类。但是在struts.xml中提到它后，当我点击注册页面上的注册按钮时，我的struts表单上看不到字段错误。
下面是我的struts.xml。请更正我应该放置 LoginInterceptors 类拦截器。下面是我的struts.xml
<?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.enable.DynamicMethodInvocation" value="true" />
<package name="myPack" extends="struts-default">
<interceptors>
<interceptor name="cache" class="org.entity.CacheInterceptor" />
<interceptor name="cacheone" class="org.entity.LoginInterceptors"></interceptor>
<interceptor-stack name="cacheStack">
<interceptor-ref name="cache" />
<interceptor-ref name="cacheone"></interceptor-ref>
<interceptor-ref name="defaultStack" />
</interceptor-stack>
</interceptors>
<default-interceptor-ref name="cacheStack" />
<action name="registration" class="org.entity.RegistrationAction">
<result name="input">BloodBankSection.jsp</result>
<result name="success">success.jsp</result>
<result name="error">BloodCampError.jsp</result>
</action>
<action name="AdminAction" class="org.entity.AdminAction">
<result name="input">Admin.jsp</result>
<result name="success">AdminLoginSucess.jsp</result>
<result name="error">Admin.jsp</result>
</action>
<action name="feedback" class="org.entity.FeedbackAction">
<result name="input">Feedback.jsp</result>
<result name="success">/feedbacksuccess.jsp</result>
<result name="error">/Feedback.jsp</result>
</action>
<action name="UpdateStockAction" class="org.entity.UpdateStockAction">
<interceptor-ref name="cacheone"></interceptor-ref>
<result name="input">UpdateStock.jsp</result>
<result name="success">updatesuccess.jsp</result>
<result name="error">UpdateStock.jsp</result>
</action>
<action name="LoginAction" class="org.entity.LoginAction">
<result name="input">BloodBankSection.jsp</result>
<result name="success">UpdateStock.jsp</result>
<result name="error">bloodloginerror.jsp</result>
</action>
<action name="delete" class="org.entity.DeleteAction">
<result name="success">AdminLoginSucess.jsp</result>
<result name="error">BloodBankSection.jsp</result>
</action>
<action name="DonorAction" class="org.entity.DonorAction">
<result name="input">DonorSection.jsp</result>
<result name="success">dsuccess.jsp</result>
<result name="error">DonorSection.jsp</result>
</action>
<action name="DonorLoginAction" class="org.entity.DonorLoginAction">
<result name="input">DonorSection.jsp</result>
<result name="success">DonorLoginSuccess.jsp</result>
<result name="error">donorloginerror.jsp</result>
</action>
<action name="SearchOneAction" class="org.entity.SearchOneAction">
<result name="input">DonorLoginSuccess.jsp</result>
<result name="success">DonorLoginSuccess.jsp</result>
<result name="error">errorsearch.jsp</result>
</action>
<action name="SearchTwoAction" class="org.entity.SearchTwoAction">
<result name="input">DonorLoginSuccess.jsp</result>
<result name="success">DonorLoginSuccess.jsp</result>
<result name="error">errorsearch.jsp</result>
</action>
<action name="SearchThreeAction" class="org.entity.SearchThreeAction">
<result name="input">DonorLoginSuccess.jsp</result>
<result name="success">DonorLoginSuccess.jsp</result>
<result name="error">errorsearch.jsp</result>
</action>
<action name="DonorInfoAction" class="org.entity.DonorInfoForBloodBank">
<result name="input">donorbloodsection.jsp</result>
<result name="success">donorbloodsection.jsp</result>
<result name="error">feedbacksuccess.jsp</result>
</action>
<action name="FPA" class="org.entity.ForgotAction">
<result name="input">ForgotPassword.jsp</result>
<result name="success">ForgotPasswordSuccess.jsp</result>
<result name="error">errorpassword.jsp</result>
</action>
<action name="DonorForgotAction" class="org.entity.DonorForgotAction">
<result name="input">DonorForgot.jsp</result>
<result name="success">DonorForgotSuccess.jsp</result>
<result name="error">errorpassword2.jsp</result>
</action>
<action name="BloodCampAction" class="org.entity.BloodCampAction">
<result name="input">BloodCampInfoReg.jsp</result>
<result name="success">BloodCampSuccess.jsp</result>
<result name="error">BloodCampError.jsp</result>
</action>
<action name="BloodBankEditAction" class="org.entity.BloodBankEditAction">
<result name="input">BloodUpdateProfile.jsp</result>
<result name="success">UpdateStock.jsp</result>
<result name="error">BloodUpdateProfile.jsp</result>
</action>
<action name="DonorEditAction" class="org.entity.DonorEditAction">
<result name="input">DonorUpdateProfile.jsp</result>
<result name="success">DonorLoginSuccess.jsp</result>
<result name="error">DonorUpdateProfile.jsp</result>
</action>
<action name="logout" class="org.entity.LoginAction" method="logout">
<result type="redirect">BloodBankSection.jsp</result>
</action>
<action name="logout2" class="org.entity.DonorLoginAction" method="logout">
<result type="redirect">DonorSection.jsp</result>
</action>
<action name="LastDonatedDateAction" class="org.entity.LastDonatedDateAction">
<result name="input">DonorLoginSuccess.jsp</result>
<result name="success">LastDonatedSuccess.jsp</result>
<result name="error">LastDonatedError.jsp</result>
</action>
</package>
</struts>
以下是我的 LoginInterceptors 类。
package org.entity;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;
public class LoginInterceptors implements Interceptor
{
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void init() {
// TODO Auto-generated method stub
}
@Override
public String intercept(ActionInvocation action) throws Exception {
HttpSession session=ServletActionContext.getRequest().getSession(false);
if(session==null || session.getAttribute("login")==null)
{
ServletActionContext.getResponse().sendRedirect("BloodBankSection.jsp");
System.out.println("First Inter");
}
return action.invoke();
}
}
由于拦截器总是先执行，因此表单字段错误不可见，也不会重定向到目标页面。输出是“第一个inter”，然后是剩余的测试线。
答案 0 :(得分：1)
首先，从实际登录操作的拦截器堆栈中删除登录拦截器。它会阻止您执行操作，因为您还没有登录。
其次，拦截器不应该直接重定向。它会创建一个新请求，这也意味着验证错误会丢失。让它返回一个结果值。
@Override
public String intercept(ActionInvocation action) throws Exception {
HttpSession session=ServletActionContext.getRequest().getSession(false);
if(session==null || session.getAttribute("login")==null)
{
System.out.println("First Inter");
return "login";
}
return action.invoke();
}
然后您可以为其创建<global-results>条目。哪个（通常）不应该是重定向。
<struts>
<package name="myPack" extends="struts-default">
<global-results>
<result name="login">BloodBankSection.jsp</result>
</global-results>
</struts>