非IoC方式访问Servlet API的两种方法-优快云博客

本文详细介绍了在Java Web开发中如何通过ActionContext和ServletActionContext访问Action上下文，包括如何获取request、session和application，并进行数据保存。

使用ActionContext访问
ActionContext来自com.opensymphony.xwork2.ActionContext

具体实现代码段如下：

<span style="font-size:14px;">public class UserAction01 extends ActionSupport {
	
	private String username;
	private String password;
	private Map<String, Object> request;
	private Map<String, Object> session;
	private Map<String, Object> application;	
	
	public String login(){
		//获取对象
		ActionContext ac=ActionContext.getContext();
		request=(Map<String, Object>)ac.get("request");
		session=ac.getSession();
		application=ac.getApplication();
		//保存数据
		request.put("loginAddress", "您本次登录地点是：北京");
		session.put("username",username);
		application.put("online","当前在线人数：XXX");</span>

此种方式获得的request,session,application均为Map集合形式。

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使用ServletActionContext访问
ServletActionContext来自org.apache.struts2.ServletActionContext
具体实现代码段如下:

<span style="font-family:Comic Sans MS;font-size:14px;">public class UserAction03 extends ActionSupport {

	private String username;
	private String password;
	private HttpServletRequest request;
	private HttpSession session;
	private ServletContext application;

	public String login() {
		// 获取对象
		request = ServletActionContext.getRequest();
		session = request.getSession();
		application = ServletActionContext.getServletContext();
		// 保存数据
		request.setAttribute("loginAddress", "您本次登录地点是：北京");
		session.setAttribute("username",username);
		application.setAttribute("online","当前在线人数：XXX");</span>

转载于:https://www.cnblogs.com/archermeng/p/7537536.html