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