服务器内部转发与客户端重定向

发表于 更新于 分类于 阅读次数： Valine：

内部转发

image-20220402160305352

这是一次响应的时间，服务器内部经过了多少组件浏览器并不知道

下面时两个组件之间的关系

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public class TestServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.getRequestDispatcher("hi").forward(req,resp);
        System.out.println("我是组件一");
    }
}
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public class GetServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("我是组件2");
    }
}
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<servlet>
    <servlet-name>TestServlet</servlet-name>
    <servlet-class>com.zss.servlets.TestServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>TestServlet</servlet-name>
    <url-pattern>/add</url-pattern>
</servlet-mapping>
<servlet>
    <servlet-name>GetServlet</servlet-name>
    <servlet-class>com.zss.servlets.GetServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>GetServlet</servlet-name>
    <url-pattern>/hi</url-pattern>
</servlet-mapping>

image-20220402161455991

成功将一个页面的处理，经过了两个组件‘

重定向

image-20220402160545843 
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public class TestServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("我是组件一");
        resp.sendRedirect("hi");
    }
}

当我们重定向的时候，标志状态为302，将页面重新定向到hi

image-20220402161939291