无法再找到我的映射(控制器)

Question

我不能找到我的映射了(我使它工作。但后来，我做了一些改变，但可能是由于缓存，我没有意识到它什么时候停止工作:-()。现在当我点击表单上的提交时，它给出了404错误。任何帮助都会很感激。提前感谢!

web . xml:

<servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/app/*</url-pattern>
    </servlet-mapping>

JSP:

<form:form method="POST" action="/app/app/studentSearchById" commandName="student">

控制器:

@Controller
// @RequestMapping("/studentSearch")
public class StudentSearchController {
    // @Autowired
    //StudentService userService = new StudentService();
    // @RequestMapping(value="/StudentSearchById", method = RequestMethod.GET)
    // public ModelAndView searchById(@PathVariable Long studentId) {
    @RequestMapping(value = "/studentSearchById", method = RequestMethod.POST)
    public ModelAndView searchById(@ModelAttribute("student") Student student, Map<String, Object> map,
            HttpServletRequest request) {
        StudentService userService = new StudentService();
        Student studentFound = userService.findStudent(student.getStudentId());
        ModelAndView modelAndView = new ModelAndView();
        // modelAndView.addObject("students", studentFound);
        return modelAndView;
    }

提前谢谢你!

Answer 1

当你使用构造型注释(@Controller， @Service， @Repository)时，最好使用context: component-scan标签来说明Spring必须扫描包，搜索注释并在应用程序上下文中注册bean。

Answer 2

我花了几个小时……就在发帖之后，我发现了…

我已经更改了spring-servlet.xml中的行。像以前一样输入这行代码，它就成功了:

<context:component-scan base-package="my.controller.package" />