关于Struts2的自定义的验证截器
package ch06.struts2.Interceptor;
import java.util.Map;
import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;
public class AuthenticationInterceptor implements Interceptor {
private static final long serialVersionUID = 1L;
public static final String USER_SESSION_KEY = "UserSessionKey";
public void destroy() {}
public void init() {}
public String intercept(ActionInvocation actionInvocation) throws Exception {
//取得Session
Map session = actionInvocation.getInvocationContext().getSession();
//从Session里获得登录时保存进session的User类
String user = (String) session.get(USER_SESSION_KEY);
//判断用户名是否为空
boolean isAuthenticated = (null!=user);
if (!isAuthenticated) {//如果未通过登录验证
//下面的那个return怎么能返回登录页面
return Action.LOGIN; //返回登录页面
}else{
// 下面的这个actionInvocation.invoke()是什么意思
return actionInvocation.invoke();//返回验证通过
}
}
}
struts.xml配置自定义的拦截器
<!-- 自定义验证拦截器 -->
<interceptors>
<interceptor name="Authentication" class="ch06.struts2.Interceptor.AuthenticationInterceptor" />
</interceptors>
<action name="Welcome">
<interceptor-ref name ="Authentication"/>
<result name="success">welcome.jsp</result>
</action>