直接贴代码,
第一种:
public class Test1 extends ActionSupport { private Map request; private Map session; private Map application; //虽然说上面定义的是map类型,但是struts在解析的时候可以把它们转换成HttpServletRequest、 //HttpSession等,这样你在页面上就可以直接用了,而且可以拿出相应的值来,这些值是在Action里面 //设置好的,如下面的execute方法里面设置的key和相应的value; public Test1() { request = (Map)ActionContext.getContext().get("request"); session = ActionContext.getContext().getSession(); application = ActionContext.getContext().getApplication(); } public String execute() { request.put("r1", "r1"); session.put("s1", "s1"); application.put("a1", "a1"); return SUCCESS; } }
第二种:
public class Test2 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:
//这种方式也挺好用的,个人也经常使用这种方式 public class Test3 extends ActionSupport { private HttpServletRequest request; private HttpSession session; private ServletContext application; public Test3() { 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; } }