Struts2（7）_Struts 动作类获得 ServletAPI

本系列博客汇总在这里：​​Struts2 汇总​​

Struts 动作类获得 ServletAPI

• • 
    
• ​​一、使用 ServletActionContext 获得 servletAPI​​
• ​​二、通过实现接口的方式来获得 servletAPI​​
  • 
    

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！