Struts2怎麼配置登入攔截器

編寫攔截器的兩種方法：

1、繼承AbstractInterceptor類，重寫intercept方法（）這裡對攔截到的内容進行處理

/**
 * 登入攔截器
 */
package com.abc.hotel.interceptor;

import java.util.Map;

import org.apache.struts2.ServletActionContext;

import com.abc.hotelsys.domain.User;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

/**
 * @author 别說難忘記
 *
 */
public class LoginInterceptor extends AbstractInterceptor {

	@Override
	public String intercept(ActionInvocation invocation) throws Exception {
		String path = ServletActionContext.getRequest().getRequestURI();
		
		if(path.contains("getImageCode")||path.contains("checkLogin")||path.contains("toLogin")) {
			return invocation.invoke();
		}
		
		ActionContext actionContext = ActionContext.getContext();
		Map<String, Object> session  = actionContext.getSession();
		User user = (User) session.get("loginUser");
		if(user!=null) {
			return invocation.invoke();
		}else {
			System.out.println("未登入，進行攔截！"+path);
			return "login_page";
		}
		
	}
		
	

}
           

2、實作Interceptor接口

/**
 * 登入攔截器
 */
package com.abc.hotel.interceptor;

import java.util.Map;

import org.apache.struts2.ServletActionContext;

import com.abc.hotelsys.domain.User;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import com.opensymphony.xwork2.interceptor.Interceptor;

/**
 * @author 别說難忘記
 *
 */
public class LoginInterceptor implements Interceptor {

	@Override
	public String intercept(ActionInvocation invocation) throws Exception {
		String path = ServletActionContext.getRequest().getRequestURI();
		
		if(path.contains("getImageCode")||path.contains("checkLogin")||path.contains("toLogin")) {
			return invocation.invoke();
		}
		
		ActionContext actionContext = ActionContext.getContext();
		Map<String, Object> session  = actionContext.getSession();
		User user = (User) session.get("loginUser");
		if(user!=null) {
			return invocation.invoke();
		}else {
			System.out.println("未登入，進行攔截！"+path);
			return "login_page";
		}
		
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void init() {
		// TODO Auto-generated method stub
		
	}
		
	

}
           

對Struts配置檔案進行配置攔截器

struts.xml

<package name="hotelsysPkg" abstract="true" extends="struts-default" >
    	<interceptors > 
    			<interceptor name="loginValidate" class="com.abc.hotel.interceptor.LoginInterceptor" />
    			<interceptor-stack name="mystack">
    				<interceptor-ref name="defaultStack"/>
		    		<interceptor-ref name="loginValidate"/>
		    	</interceptor-stack>
    	</interceptors>
    	<default-interceptor-ref name="mystack" />  
    	<global-results>
    		<result name="login_page">../WEB-INF/views/login.jsp</result>
    	</global-results>
</package> 
           

運作截圖如下：