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