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;
}
}
