struts2将https url强制重定向到http

<struts>
  <constant name="struts.enable.DynamicMethodInvocation" value="false" />
  <constant name="struts.devMode" value="false" />

  <package name="default" extends="struts-default">
    <interceptors>
      <interceptor name="httpsRedirectInterceptor" class="com.example.HttpsRedirectInterceptor" />
      <interceptor-stack name="httpsRedirectStack">
        <interceptor-ref name="httpsRedirectInterceptor" />
        <interceptor-ref name="defaultStack" />
      </interceptor-stack>
    </interceptors>

    <default-interceptor-ref name="httpsRedirectStack" />
    <!-- 其他配置 -->
  </package>
</struts>

package com.example;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class HttpsRedirectInterceptor extends AbstractInterceptor {
  @Override
  public String intercept(ActionInvocation invocation) throws Exception {
    String scheme = invocation.getInvocationContext().getScheme();
    if (scheme.equalsIgnoreCase("https")) {
      String newUrl = "http://" + invocation.getInvocationContext().getServerName() + invocation.getInvocationContext().getServletPath();
      invocation.getInvocationContext().getResponse().sendRedirect(newUrl);
      return null;
    }
    return invocation.invoke();
  }
}