为什么Spring不扫描我的控制器

时间:2017-07-11 20:08:49

标签: java spring spring-mvc

我想学习一些关于Spring的知识。我试图配置它,但有些东西我不能得到,因为看起来Spring似乎无法识别我的控制器。

这是我的web.xml

  <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>dispatcher</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <servlet-name>dispatcher</servlet-name>
         <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/*</url-pattern>
  </servlet-mapping>
</web-app>

这个是servlet

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:mvc="http://www.springframework.org/schema/mvc" 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.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="it.mexpenses.controller" />
    <mvc:annotation-driven />


    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
        <property name="order" value="1" />
    </bean>
</beans>

控制器:

package it.mexpenses.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class LoginController {

    @GetMapping("/login")
    public ModelAndView login() {
        User user = loginService.login(username, password);
        return new ModelAndView("welcome", "currentUser", null);
    }
}

1 个答案:

答案 0 :(得分:1)

在典型的spring MVC应用程序中,您会发现有两个spring配置文件,一个配置应用程序上下文的文件,通常以Spring上下文侦听器启动。

UITextView

Spring MVC配置文件通常以Spring调度程序servlet开头。例如。

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

我强烈建议对Spring配置使用注释。它让生活更轻松,更现代......

您还可以使用春季启动生成项目,让您的生活更轻松:https://start.spring.io/

参考:Spring MVC: difference between <context:component-scan> and <annotation-driven /> tags?