struts2 获取session

最新推荐文章于 2023-05-11 17:25:19 发布

转载最新推荐文章于 2023-05-11 17:25:19 发布 · 468 阅读

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本文介绍四种在Struts2框架中获取请求、会话及应用数据的方法，包括直接使用ActionContext、实现特定接口、利用Servlet API以及实现ServletRequestAware接口的方式。

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//第一种很少用
public class LoginAction1 extends ActionSupport {

    private Map request;
    private Map session;
    private Map application;

    public LoginAction1() {
        request = (Map)ActionContext.getContext().get("request");
        session = ActionContext.getContext().getSession();
        application = ActionContext.getContext().getApplication();
    }

    public String execute() {
        request.put("r1", "request1");
        session.put("s1", "session1");
        application.put("a1", "application1");
        return SUCCESS;
    }
}
//第二种几乎都用这种方式
public class LoginAction2 extends ActionSupport implements RequestAware,SessionAware, ApplicationAware {

    private Map<String, Object> request;
    private Map<String, Object> session;
    private Map<String, Object> application;

    //DI dependency injection
    //IoC inverse of control
    public String execute() {
        request.put("r1", "r1");
        session.put("s1", "s1");
        application.put("a1", "a1");
        return SUCCESS;
    }

    @Override
    public void setRequest(Map<String, Object> request) {
        this.request = request;
    }

    @Override
    public void setSession(Map<String, Object> session) {
        this.session = session;
    }

    @Override
    public void setApplication(Map<String, Object> application) {
        this.application = application;
    }


}
//第三种很少用
public class LoginAction3 extends ActionSupport {

    private HttpServletRequest request;
    private HttpSession session;
    private ServletContext application;

    public LoginAction3() {
        request = ServletActionContext.getRequest();
        session = request.getSession();
        application = session.getServletContext();
    }

    public String execute() {
        request.setAttribute("r1", "r1");
        session.setAttribute("s1", "s1");
        application.setAttribute("a1", "a1");
        return SUCCESS;
    }

}
//第四种很少用
public class LoginAction4 extends ActionSupport implements ServletRequestAware {

    private HttpServletRequest request;
    private HttpSession session;
    private ServletContext application;



    public String execute() {
        request.setAttribute("r1", "r1");
        session.setAttribute("s1", "s1");
        application.setAttribute("a1", "a1");
        return SUCCESS;
    }

    @Override
    public void setServletRequest(HttpServletRequest request) {
        this.request = request;
        this.session = request.getSession();
        this.application = session.getServletContext();
    }