Struts2 拦截器—拦截action

对于拦截器的基本使用这里我就懒得打字了，我这里就讲下如何用 Struts2 拦截器 拦截action。这是我个人的想法，如果有什么不对的，或者你们有什么更好的方法。请多多留言！

    

       拦截器的默认拦截的方法参数是：includeMethods（要拦截的方法） 和 excludeMethods（不需要拦截的方法），多个的时候，用逗号分开；

       但，现实中，有些时候。我们还是需要设置有3 个类的所有方法都不需要拦截和4个方法不需要拦截，那么如果使用excludeMethods 的话，就得把 3 个类中的所有方法都列出来。当然如果少就列列就算了，如果多呢。不就麻烦了。所以。下面我们将讨论如何拦截 类 这个级别的请求。

一、在配置文件中修改下:

<interceptors>
        <interceptor name="mainSession" class="net.zy.interceptor.MainSessionInterceptor"></interceptor>
        <interceptor-stack name="mainSessionStack">
            <interceptor-ref name="mainSession">
                <param name="excludeMethods">login,logOut</param>
                <!-- 自定义参数 excludeActions -->
                <param name="excludeActions">sms_,main_</param>
            </interceptor-ref>
            <!-- 默认拦截器 -->
            <interceptor-ref name="defaultStack"></interceptor-ref>
        </interceptor-stack>
    </interceptors>
    <!-- 设置未默认的拦截器 -->
    <default-interceptor-ref name="mainSessionStack"></default-interceptor-ref>

		<interceptors>
 			<interceptor name="mainSession" class="net.zy.interceptor.MainSessionInterceptor"></interceptor>
 			<interceptor-stack name="mainSessionStack">
 				<interceptor-ref name="mainSession">
 					<param name="excludeMethods">login,logOut</param>
 					<!-- 自定义参数 excludeActions -->
 					<param name="excludeActions">sms_,main_</param>
 				</interceptor-ref>
 				<!-- 默认拦截器 -->
 				<interceptor-ref name="defaultStack"></interceptor-ref>
 			</interceptor-stack> 
 		</interceptors>
 		<!-- 设置未默认的拦截器 -->
 		<default-interceptor-ref name="mainSessionStack"></default-interceptor-ref>

 在配置文件中，添加自定义参数。excludeActions

二、在拦截器类中，添加 excludeActions  成员变量，并且提供get,set方法，struts2会自定给我们set参数进来。

  

package net.zy.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import net.zy.models.SysUsers;
import net.zy.models.VipBean;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;

/**
 * 拦截器
 *
 * @author 妞见妞爱
 */
public class MainSessionInterceptor implements Interceptor{

    private String excludeActions;
    private String excludeMethods;


    public String getExcludeMethods() {
        return excludeMethods;
    }

    public void setExcludeMethods(String excludeMethods) {
        this.excludeMethods = excludeMethods;
    }

    public String getExcludeActions() {
        return excludeActions;
    }

    public void setExcludeActions(String excludeActions) {
        this.excludeActions = excludeActions;
    }

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

    }

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

    }


    public String intercept(ActionInvocation invocation) throws Exception {

        HttpServletRequest request = ServletActionContext.getRequest();
        HttpSession session = request.getSession();

        // 获取请求的action名称
        String actionName = invocation.getInvocationContext().getName();
        // 获取action后附带参数
        //Map parameters = invocation.getInvocationContext().getParameters();

        //配置文件中 排除的 action
        String [] excludeAction = excludeActions.split(",");
        for (int i = 0; i < excludeAction.length; i++) {
            if (actionName.startsWith(excludeAction[i])) {
                return invocation.invoke();
            }
        }

        //配置文件中 排除的 Method
        String [] excludeMethod = excludeMethods.split(",");
        for (int i = 0; i < excludeMethod.length; i++) {
            if (actionName.endsWith(excludeMethod[i])) {
                return invocation.invoke();
            }
        }

        SysUsers  users = (SysUsers) session.getAttribute("user");
        if (users != null) {
            return invocation.invoke();
        }


        return "Timeout";
    }



}

package net.zy.interceptor; 

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession; 
import net.zy.models.SysUsers;
import net.zy.models.VipBean; 
import org.apache.struts2.ServletActionContext; 
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;

/**
 * 拦截器
 * 
 * @author 妞见妞爱
 */
public class MainSessionInterceptor implements Interceptor{

	private String excludeActions;
	private String excludeMethods;  
	 
	
	public String getExcludeMethods() {
		return excludeMethods;
	}

	public void setExcludeMethods(String excludeMethods) {
		this.excludeMethods = excludeMethods;
	}

	public String getExcludeActions() {
		return excludeActions;
	}

	public void setExcludeActions(String excludeActions) {
		this.excludeActions = excludeActions;
	}

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

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

	 
	public String intercept(ActionInvocation invocation) throws Exception { 
		
		HttpServletRequest request = ServletActionContext.getRequest();
		HttpSession session = request.getSession();
		 
		// 获取请求的action名称
		String actionName = invocation.getInvocationContext().getName();    
		// 获取action后附带参数    
        //Map parameters = invocation.getInvocationContext().getParameters();    

		//配置文件中 排除的 action
		String [] excludeAction = excludeActions.split(",");
		for (int i = 0; i < excludeAction.length; i++) {
			if (actionName.startsWith(excludeAction[i])) {
				return invocation.invoke(); 
			}
		}
		
		//配置文件中 排除的 Method
		String [] excludeMethod = excludeMethods.split(",");
		for (int i = 0; i < excludeMethod.length; i++) {
			if (actionName.endsWith(excludeMethod[i])) {
				return invocation.invoke(); 
			}
		}
		
		SysUsers  users = (SysUsers) session.getAttribute("user");
		if (users != null) {
			return invocation.invoke();
		}
		 
		 		
		return "Timeout";
	}

	 

}

   嘿嘿。。。就这样了....简单点。。。。。