Struts2 访问servlet接口和分文件编写配置文件

在动作类中访问Servlet的API

第一种方式：使用ServletActionContext类

public String execute() throws Exception {

        HttpServletRequest request = ServletActionContext.getRequest();
        HttpServletResponse response = ServletActionContext.getResponse();
        ServletContext application = ServletActionContext.getServletContext();
        HttpSession session = request.getSession();


        System.out.println(request);
        System.out.println(response);
        System.out.println(application);
        System.out.println(session);

        return null;
}

这是一种比较好的方式，我们一般用这种方式就可以了。

第二种方式：使用实现接口的方式

public class TestAction extends ActionSupport implements ServletRequestAware,ServletResponseAware,ServletContextAware{
    private HttpServletRequest request;
    private HttpServletResponse response;
    private ServletContext application;

    @Override
    public String execute() throws Exception {

        System.out.println(request);
        System.out.println(response);
        System.out.println(application);
        System.out.println(session);

        return null;
    }
    public void setServletContext(ServletContext application) {
        this.application = application;
    }
    public void setServletResponse(HttpServletResponse response) {
        this.response = response;
    }
    public void setServletRequest(HttpServletRequest request) {
        this.request = request;
    }
}

这种方法稍麻烦一点。

分文件编写框架配置文件

我们的每一个配置文件负责不同功能的配置，我们可以通过include来包含进这些xml文件

<struts>
    <constant name="struts.devMode" value="true"></constant>

    <include file="struts_role.xml"></include>

    <include file="struts_user.xml"></include>
</struts>