Struts2拦截器-PreResultListener

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

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