javaweb项目网页自动刷新

心已赠人 2022-03-21 10:44 428阅读 0赞

#### 一、项目结构 ####

**效果：**

1.  用ServletRefresh访问网页/refresh
2.  然后会将请求转发到index.jsp页面
3.  等待3秒后或者点击链接会自动刷新，跳转到首页home.html  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqdTIy_size_16_color_FFFFFF_t_70]

#### 二、ServletRefresh.Java ####

package net.test.servlet;
    
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    
    @WebServlet(name = "ServletRefresh",urlPatterns = "/refresh")
    public class ServletRefresh extends HttpServlet {
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
        }
    
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            //3秒后自动跳转或者点击链接跳转首页
            String message="  <meta http-equiv='refresh' content='3;/hello/home.html'>" +
                    "3秒后将自动跳转到首页，如果没有跳转，请点击" +
                    "<a href='/hello/home.html'>跳转链接</a>";
            //设置属性
            request.setAttribute("message",message);
            //请求转发
            request.getRequestDispatcher("/index.jsp").forward(request,response);
        }
    }

#### 三、index.jsp ####

<%--
      Created by IntelliJ IDEA.
      User: Administrator
      Date: 2019/1/29
      Time: 0:02
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
      <head>
        <title>$Title$</title>
      </head>
      <body>
      #获取属性
      <%=request.getAttribute("message")%>
      </body>
    </html>

#### 四、home.html ####

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>首页</title>
    </head>
    <body>
        <h3>网站首页</h3>
    </body>
    </html>

#### 五、部署及运行 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqdTIy_size_16_color_FFFFFF_t_70 1]  
访问/refresh页面  
![在这里插入图片描述][20190201075300569.]  
3秒后或者点击链接，跳转到如下页面

![在这里插入图片描述][20190201075321304.]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqdTIy_size_16_color_FFFFFF_t_70]: /images/20220321/e648db67612d40e88cc6357a37311bc1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqdTIy_size_16_color_FFFFFF_t_70 1]: /images/20220321/bb415b0cd9984ca38d534ee1e998427e.png
[20190201075300569.]: /images/20220321/a337e278a0064e57b71a866b69f9edd2.png
[20190201075321304.]: /images/20220321/1f35f8db21664a2581f3a39d175dd541.png