Struts2拦截器-PreResultListener

 PreResultListener拦截器是在action方法执行后，返回result以前执行的拦截器。

 

package com.struts2.interceptor;
import com.opensymphony.xwork2.ActionSupport;
public class MyAction extends ActionSupport {
    /**
     *
     */
    private static final long serialVersionUID = 1L;
    @Override
    public String execute() throws Exception {
        System.out.println("execute方法");
        return SUCCESS ;
    }

}

 

 

一个简单例子，打印简单的一句话，加上一个简单的拦截器

 

 

package com.struts2.interceptor;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
public class MyInterceptor extends AbstractInterceptor {
    /**
     *
     */
    private static final long serialVersionUID = 1L;
    @Override
    public String intercept(ActionInvocation invo) throws Exception {

        invo.addPreResultListener(new PreInter()) ;
        System.out.println("拦截器前执行");

        String result = invo.invoke() ;

        System.out.println("拦截器后执行");

        return result ;
    }
}

 

 

加上preResult拦截器：

 

 

package com.struts2.interceptor;
import com.opensymphony.xwork2.ActionInvocation;
public class PreInter implements PreResultListener {
    public void beforeResult(ActionInvocation arg0, String arg1) {
        System.out.println("结果集返回前执行");
    }
}

 

 

运行结果：

 

拦截器前执行
execute方法
结果集返回前执行
拦截器后执行