【问题标题】:redirected page is not being displayed with spring-mvc ajax requestspring-mvc ajax请求未显示重定向页面
【发布时间】:2018-07-10 18:01:23
【问题描述】:

在我的 Spring MVC 应用程序中,我想使用 AJAX 将我的页面从 index.jsp 页面重定向到 final.jsp 页面。但是当我在我的应用程序中单击Redirect Page 按钮时,没有显示重定向页面(final.jsp)。我在我的 Java 代码中使用了 System.out.println("inside /redirect");System.out.println("inside /finalPage"); 来检查服务器是否接收到 AJAX GET 请求,并且只打印了 inside /redirect,这意味着没有调用 /finalPage。此外,我的浏览器控制台没有显示任何错误。那么请告诉我,可能是什么问题,问题出在哪里?我在下面发布了我的完整代码:

WebController.java

package com.tutorialspoint;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class WebController {

   @RequestMapping(value = "/index", method = RequestMethod.GET)
   public String index() {
       return "index";
   }

   @RequestMapping(value = "/redirect", method = RequestMethod.GET)
   public String redirect() {
      System.out.println("inside /redirect");
      return "redirect:/finalPage";
   }

   @RequestMapping(value = "/finalPage", method = RequestMethod.GET)
   public String finalPage() {
       System.out.println("inside /finalPage");
      return "final";
   }
}

index.jsp

<%@taglib uri = "http://www.springframework.org/tags/form" prefix = "form"%>
<html>
   <head>
      <title>Spring Page Redirection</title>
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
   </head>
   <body>
      <h2>Spring Page Redirection</h2>
      <p>Click below button to redirect the result to new page</p>
      <button onClick="redFun()">Redirect Page</button>
      <script>
            function redFun() {
                $.ajax({
                    type : "GET",
                    url : "/HelloWeb/redirect"
                });
            }
      </script>
   </body>
</html>

final.jsp

<%@taglib uri = "http://www.springframework.org/tags/form" prefix = "form"%>
<html>

   <head>
      <title>Spring Page Redirection</title>
   </head>

   <body>
      <h2>Redirected Page</h2>
   </body>

</html>

web.xml:

<web-app id = "WebApp_ID" version = "2.4"
   xmlns = "http://java.sun.com/xml/ns/j2ee" 
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation = "http://java.sun.com/xml/ns/j2ee 
   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

   <display-name>Spring MVC Application</display-name>

   <servlet>
      <servlet-name>HelloWeb</servlet-name>
      <servlet-class>
         org.springframework.web.servlet.DispatcherServlet
      </servlet-class>
      <load-on-startup>1</load-on-startup>
   </servlet>

   <servlet-mapping>
      <servlet-name>HelloWeb</servlet-name>
      <url-pattern>/</url-pattern>
   </servlet-mapping>

</web-app>

HelloWeb-servlet.xml

<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:context = "http://www.springframework.org/schema/context"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation = "
   http://www.springframework.org/schema/beans     
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context 
   http://www.springframework.org/schema/context/spring-context-3.0.xsd">

   <context:component-scan base-package = "com.tutorialspoint" />

   <bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver">
      <property name = "prefix" value = "/WEB-INF/jsp/" />
      <property name = "suffix" value = ".jsp" />
   </bean>

</beans>

【问题讨论】:

    标签: java ajax spring jsp spring-mvc


    【解决方案1】:

    您的浏览器未遵循重定向,因为您使用 ajax 来访问控制器的重定向方法。你有两个选择:

    1. 完全不要使用ajax,让浏览器自然响应重定向状态。

      function redFun() {
          window.location = "/HelloWeb/redirect";
      }
      
    2. 查找对 XmlHttpRequest 的 HTTP 302 响应,并将 window.location 更改为响应中 Location 标头的值:

      function redFun() {
          $.ajax({
              type: "GET",
              url: "/HelloWeb/redirect"
          }).fail(function (jqXHR, status, err) {
              if (jqXHR.status === 302) {
                  window.location = jqXHR.getResponseHeader('Location');
              }    
          });
      }
      

    【讨论】:

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