Struts2（7）_Struts 动作类获得 ServletAPI

本系列博客汇总在这里：Struts2 汇总

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一、使用 ServletActionContext 获得 servletAPI

package com.wyx.action;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.servlet.jsp.PageContext;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

/**
 * action动作类
 */
public class HelloAction extends ActionSupport
{
	public String hello()
	{
		//获得page域对象
		PageContext page = ServletActionContext.getPageContext();
		//获得request
		HttpServletRequest request = ServletActionContext.getRequest();
		//获得response
		HttpServletResponse response = ServletActionContext.getResponse();
		//获得session
		HttpSession session = request.getSession();
		//获得application
		ServletContext sc = ServletActionContext.getServletContext();
		System.out.println(page);
		System.out.println(request);
		System.out.println(response);
		System.out.println(session);
		System.out.println(sc);
		return super.SUCCESS;
	}
}

二、通过实现接口的方式来获得 servletAPI

package com.wyx.action;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.util.ServletContextAware;

import com.opensymphony.xwork2.ActionSupport;

/**
 * action动作类
 */
public class HelloAction1 extends ActionSupport implements ServletRequestAware, ServletResponseAware, ServletContextAware
{
	HttpServletRequest request;
	
	HttpServletResponse response;
	
	ServletContext sc;
	
	public String hello()
	{
		System.out.println(request);
		String result = request.getParameter("name");
		System.out.println(result);
		System.out.println(request.getSession());
		System.out.println(response);
		System.out.println(sc);
		return super.SUCCESS;
	}

	@Override
	public void setServletRequest(HttpServletRequest request) 
	{
		this.request = request;
	}

	@Override
	public void setServletResponse(HttpServletResponse response) 
	{
		this.response = response;
	}

	@Override
	public void setServletContext(ServletContext context) 
	{
		this.sc = context;
	}
}

如有错误，欢迎指正！