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Struts2访问servlet分享

发布时间：2023-01-01 08:48:27 来源：互联网

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一：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>

二：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;
 }
}