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Struts2访问servlet分享

程序员文章站 2024-02-13 20:24:34
一:访问或添加request/session/application属性 复制代码 代码如下:public string scope() throws excep...

一:访问或添加request/session/application属性
 

复制代码 代码如下:

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:

复制代码 代码如下:

 <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:

复制代码 代码如下:

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:
复制代码 代码如下:

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;

       }

}