struts之Action中获取request、request获取referer请求头实现防盗链 

 javaweb之request获取referer请求头实现防盗链    .

http://blog.csdn.net/mustbehard/article/details/20786551
2014-03-08 16:44 4199人阅读 评论(0) 收藏 举报 
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[java] view plain copy 
01.package test.request;  
02.  
03.import java.io.IOException;  
04.  
05.import javax.servlet.ServletException;  
06.import javax.servlet.http.HttpServlet;  
07.import javax.servlet.http.HttpServletRequest;  
08.import javax.servlet.http.HttpServletResponse;  
09.  
10.//利用referer请求头实现防盗链  
11.public class RequestDemo8 extends HttpServlet {  
12.  
13.    public void doGet(HttpServletRequest request, HttpServletResponse response)  
14.            throws ServletException, IOException {  
15.        // 获取请求是从哪里来的  
16.        String referer = request.getHeader("referer");  
17.        // 如果是直接输入的地址，或者不是从本网站访问的重定向到本网站的首页  
18.        if (referer == null || !referer.startsWith("http://localhost")) {  
19.            response.sendRedirect("/day06/index.jsp");  
20.            // 然后return，不要输出后面的内容了  
21.            return;  
22.        }  
23.        String date = "日记";  
24.        response.getWriter().write(date);  
25.    }  
26.  
27.    public void doPost(HttpServletRequest request, HttpServletResponse response)  
28.            throws ServletException, IOException {  
29.        doGet(request, response);  
30.    }  
31.  
32.}

 

struts之Action中获取request、response对象的方法


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;

    }

}

           

代码


复制代码

package com.ljq.action;

import java.util.Arrays;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;

public class HelloWorldAction {

//在页面中采用以下el表达式输出
//第一种
//${applicationScope.app} 
//${sessionScope.ses}
//${requestScope.req}
//第二种
//${app} 
//${ses}
//${req}
 public String list() {
 ActionContext ctx = ActionContext.getContext();
 ctx.getApplication().put("app", "应用范围");// 往ServletContext里放入application
 ctx.getSession().put("ses", "session范围");// 往session里放入session
 ctx.put("req", "request范围");// 往request里放入request
 ctx.put("names", Arrays.asList("张三", "李四", "王五"));
return "message";
 }

//在页面中采用以下el表达式输出
//第一种
//${applicationScope.app} 
//${sessionScope.ses}
//${requestScope.req}
//第二种
//${app} 
//${ses}
//${req}
 public String get() throws Exception {
 HttpServletRequest request = ServletActionContext.getRequest();
 ServletContext servletContext = ServletActionContext.getServletContext();
 request.setAttribute("req", "请求范围属性");
request.getSession().setAttribute("ses", "会话范围属性");
servletContext.setAttribute("app", "应用范围属性");
// HttpServletResponse response = ServletActionContext.getResponse();
 return "message";
}
}





jsp代码
${applicationScope.app} <br>
${sessionScope.ses}<br>
${requestScope.req}<br>
===========<br/>
${app} <br>
${ses}<br>
${req}<br>
===========<br/>
<c:forEach items="${names}" var="name">
${name }<br/>
</c:forEach>



分类: struts2

标签: struts2 action中获取request、respon对象

 

posted @ 2017-09-21 09:25  sky20080101  阅读(661)  评论(0)    收藏  举报