AJAX 在 Spring MVC 中返回 404

Question

ViewResolver（我的 jsp 位于前缀值指定的正确文件夹中）：

<!-- Resolves views selected for rendering by @Controllers --> 
<!-- to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".jsp" />
</beans:bean>

Servlet 映射：

<servlet-mapping>
    <servlet-name>appServlet</servlet-name>
    <url-pattern>*.fst</url-pattern>
</servlet-mapping>

控制器：

@Controller
public class HomeController {   
    private static final Logger logger = 
        LoggerFactory.getLogger(HomeController.class);

    @RequestMapping("/home")
    public ModelAndView home(String user, HttpServletRequest request) {
        logger.info("Home controller has been executed");
        ModelAndView mv = new ModelAndView();

        mv.addObject("userName", user);
        mv.addObject("controllerName", request.getRequestURI());
        mv.setViewName("home");

        return mv;
    }

    @RequestMapping(value = "/testAjax", method = RequestMethod.POST)
    public String testAjax(@RequestParam("memberId") String id, 
        HttpServletRequest request, HttpServletResponse response, 
        Locale locale, Model model) {

        logger.info("Text Ajax action has been executed. My Parameter is " + id);

        return id;
    }
}

在 STS IDE 上打开 Tomcat 8 服务器后，使用此 url http://localhost:8080/home.fst 访问此网站正常。

但在页面上，像下面这样调用 AJAX 会引发 404 错误：

$.ajax({
    type: "POST",
    url: "/testAjax.fst",
    data: {"memberId" : "test"},
    success: function (result) {
        console.log(result)
    } 
});

这是控制台错误日志：

 POST http://localhost:8080/testAjax.fst 404 (Not Found)
 k.cors.a.crossDomain.send                     jquery-2.1.3.min.js:4
 n.extend.ajaxhome.fst:11 (anonymous function) jquery-2.1.3.min.js:3
 n.event.dispatch                              jquery-2.1.3.min.js:3
 r.handle

奇怪的是它调用testAjax控制器很好，服务器上没有错误日志。

logger.info("Text Ajax action has been executed. My Parameter is " + id);

当我的 AJAX 调用 textAjax 操作时，也会打印日志。我也用调试点检查了它（它坏了）。

好像是怎么回事？？

Answer 1

一切都很好，只需在您的方法中添加 @ResponseBody 注释，我建议您将请求方法 POST 更改为 GET

春天

@RequestMapping(value = "/testAjax", method = RequestMethod.GET) //Made Change
@ResponseBody //added
public String testAjax(@RequestParam("memberId") String id,     HttpServletRequest request, HttpServletResponse response, Locale locale, Model model) {
    logger.info("Text Ajax action has been executed. My Parameter is " + id);

    return id;
}

JQuery

$.ajax({
    type: "GET", //Made Change
    url:"/testAjax.fst",
    data: {"memberId" : "test"},
    success: function (result) {
    console.log(result)
    } 
});