struts之Action中获取request、response对象的方法

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1、访问或添加request/session/application属性

public String scope() throws Exception{    ActionContext ctx = ActionContext.getContext();    ctx.getApplication().put("app", "应用范围");//往ServletContext里放入app    ctx.getSession().put("ses", "session范围");//往session里放入ses    ctx.put("req", "request范围");//往request里放入req    return "scope";}

JSP:

<body>

${applicationScope.app} <br>

${sessionScope.ses}<br>

${requestScope.req}<br>

</body>

2、获取HttpServletRequest/HttpSession/ServletContext/HttpServletResponse对象

方法一、通过ServletActionContext类直接获取：

public String rsa() throws Exception{    HttpServletRequest request = ServletActionContext.getRequest();    ServletContext servletContext = ServletActionContext.getServletContext();    request.getSession();    HttpServletResponse response = ServletActionContext.getResponse();     return "scope";}

方法二、实现指定接口，由struts框架运行时注入：

public class HelloWorldAction implements ServletRequestAware, ServletResponseAware, ServletContextAware{    private HttpServletRequest request;    private ServletContext servletContext;    private HttpServletResponse response;    public void setServletRequest(HttpServletRequest req) {        this.request=req;    }    public void setServletResponse(HttpServletResponse res) {        this.response=res;    }    public void setServletContext(ServletContext ser) {        this.servletContext=ser;    }}

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