Java Heroku Post请求在本地主机上工作，但在Heroku上不工作

我试图使用Heroku发布一个小型Rest服务。 我遇到的问题是，当我尝试从Postman为我的本地主机发送邮件时，post request loginU可以工作，但当我将其部署到heroku时，它不能工作。

herokuURL：

heroku日志：

2020-02-05T14:03:56.133012+00:00 app[web.1]: 14:03:56.132 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.DispatcherServlet - POST "/loginU", parameters={}
2020-02-05T14:03:56.140330+00:00 app[web.1]: 14:03:56.140 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.handler.SimpleUrlHandlerMapping - Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]
2020-02-05T14:03:56.141139+00:00 app[web.1]: 14:03:56.141 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.resource.ResourceHttpRequestHandler - Resource not found
2020-02-05T14:03:56.141259+00:00 app[web.1]: 14:03:56.141 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.DispatcherServlet - Completed 404 NOT_FOUND
2020-02-05T14:03:56.150004+00:00 app[web.1]: 14:03:56.149 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.DispatcherServlet - "ERROR" dispatch for POST "/error", parameters={}

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似乎

gpaCalculator

方法抛出了一个异常，这个方法做什么？你能发布你的本地主机url和heroku url吗understand@B.MgpaCalculator正在尝试使用用户凭据登录大学系统，并通过网络抓取获取学生信息，但我不认为这是问题的原因，因为我得到了一个路径未找到错误：/@NaveenKulkarni herokuURL-->另一个是本地Tomcat服务器localhost:5000

  @PostMapping("/loginUser")
    public ResponseEntity getGrades(@RequestParam(value="username") String username, @RequestParam(value="passw") String password) {

        Student current = null;
        try {current = gpaCalculator.getStudent(username, password);
            return ResponseEntity.ok(current);
        } catch (Exception e) {
            System.out.println(e);
            return ResponseEntity.ok(current);
        }

    }

2020-02-05T14:03:56.133012+00:00 app[web.1]: 14:03:56.132 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.DispatcherServlet - POST "/loginU", parameters={}
2020-02-05T14:03:56.140330+00:00 app[web.1]: 14:03:56.140 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.handler.SimpleUrlHandlerMapping - Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]
2020-02-05T14:03:56.141139+00:00 app[web.1]: 14:03:56.141 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.resource.ResourceHttpRequestHandler - Resource not found
2020-02-05T14:03:56.141259+00:00 app[web.1]: 14:03:56.141 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.DispatcherServlet - Completed 404 NOT_FOUND
2020-02-05T14:03:56.150004+00:00 app[web.1]: 14:03:56.149 [http-nio-34176-exec-9] DEBUG org.springframework.web.servlet.DispatcherServlet - "ERROR" dispatch for POST "/error", parameters={}