页面跳转的两种方式：转发和重定向

小鱼儿 2021-12-11 11:53 254阅读 0赞

理论参考https://blog.csdn.net/xybelieve1990/article/details/49486751这篇文章

1 Servlet、location和状态吗302一起完成重定向

import java.io.IOException;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    /**
     * 和location和302一起完成重定向
     * @author Administrator
     *
     */
    public class ServletDmo1 extends HttpServlet {
    
        public void doGet(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
            // 向页面输出内容
            response.setContentType("text/html;charset=UTF-8");
            // response.getWriter().write("向班长借钱...");
            // 班长没钱
            response.setStatus(302);
            // 班长告诉我副班长的地址（重定向都是客户端的，带项目名）
            response.setHeader("location", "/day09/1.html");
        }
    
        public void doPost(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
            doGet(request, response);
        }
    
    }

项目day09/1.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Insert title here</title>
    </head>
    <body>
        
        <h3>1.html的相对路径</h3>
        <a href="./demo5">demo5</a>
        <a href="demo5">demo5</a>
        
        <h3>1.html的绝对路径</h3>
        <a href="http://localhost/day09/demo5">demo5</a>
        <a href="/day09/demo5">demo5</a>
        
    </body>
    </html>

demo5是通过配web.xml置文件与反射技术跳转到ServletDemo5

import java.io.IOException;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    /**
     * 配置servlet启动时加载
     * @author Administrator
     *
     */
    public class ServletDemo5 extends HttpServlet {
        
        /**
         * 默认的情况下第一次访问的时候init被调用。
         * 
         */
        public void init() throws ServletException {
            System.out.println("init...");
            // 初始化数据库的链接
            
        }
        
        public void doGet(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
            // 写的内容
            // 获取表单输入的内容
            // 自己逻辑，通过名称查询数据库，把张三的姓名查到了
            // 把张三返回浏览器,
            //向控制台输出结果
            System.out.println("doGet...");
            // 向页面输出内容
            response.getWriter().write("hello demo5...");
        }
        
        public void doPost(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException {
            doGet(request,response);
        }
        
    }

2 页面的定时跳转

转载于:https://www.cnblogs.com/zsj03180204/p/11045532.html