1.ServletActionContext方式

可以訪問原始API

TestServletActionContextAction.java

package Demo2;

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

import org.apache.struts2.ServletActionContext;

public class TestServletActionContextAction {

    public String execute()
    {
        /*
         * Servlet ActionContext：可以從中獲取到當前Action物件需要的一切Servlet API物件
         * 常用的方法：
         * 獲取HttpServletRequest：ServletActionContext.getRequest()
         * 獲取HttpSession：ServletActionContext.getRequest().getSession()
         * 獲取ServletContext：ServletActionContext.getServletContext()
         */
 

        HttpServletRequest request=ServletActionContext.getRequest();
        HttpSession session=ServletActionContext.getRequest().getSession();
        ServletContext servletContext=ServletActionContext.getServletContext();
        System.out.println("execute...");
        return "success";
    }

}
 

總結：HttpServletRequest：ServletActionContext.getRequest()

2.ServletAware

TestServletAwareAction.java
實現 ServletRequestAware，ServletContextAware，ServletResponseAware
介面

package Demo2;

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


import org.apache.struts2.interceptor.ServletRequestAware;

import
 
 org.apache.struts2.util.ServletContextAware;
/*
 * 通過實現ServletSxxAware介面的方式由Struts2注入
 * 需要的Servlet相關的介面
 * ServletRequestAware，ServletContextAware，ServletResponseAware
 */
public class TestServletAwareAction implements 
        ServletRequestAware,ServletContextAware{
    @Override
    public void setServletRequest(HttpServletRequest request) {
        // TODO Auto-generated method stub
        System.out.println(request);

    }
    private ServletContext context;
    @Override
    public void setServletContext(ServletContext context) {
        // TODO Auto-generated method stub
        System.out.println(context);
        this.context=context;
    }

    public String execute()
    {
        System.out.println("............");
        System.out.println("ServletContext: "+context);
        return "sussess";
    }

}

總結：實現serrvletXxxAware介面，寫public void ServletXxxAware（ServletXxx xxx）方法