java - 无法配置 Spring MVC 应用程序

Question

我在配置 Spring MVC 应用程序时遇到了大问题。无论我在配置 xml 中写什么，在到达 localhost/appname/或 localhost/appname/register 时都会收到 404 。为什么会发生这种情况？阅读 Maven 中的 MVC 教程，看起来我正在按照他们所说的做所有事情。

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>Wymysl to!</display-name>




    <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>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
    </context-param>

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

</web-app>

调度程序-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="
 http://www.springframework.org/schema/mvc 
 http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
 http://www.springframework.org/schema/beans 
 http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
 http://www.springframework.org/schema/context 
  http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <context:component-scan base-package="wymysl.Controllers" /> 
    <context:annotation-config />

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

     <bean
        class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>



</beans>

RegisterController.java

package wymysl.Controllers;



import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import wymysl.database.Person;
import wymysl.database.PersonsRepository;


@Controller
public class RegisterController {

    @Autowired
    PersonsRepository repo;

    @RequestMapping(value = "/register", method = RequestMethod.GET)
    public String register() {


        return "register";

    }

    @RequestMapping(value = "/register", method = RequestMethod.POST)
    public String register(@ModelAttribute("Person") Person person) {

        System.out.println(""+person.getName());

        return "index";

    }



}

Answer 1

您可以更改以使其更加基本的内容:-

1. 删除

   上下文配置位置 /WEB-INF/dispatcher-servlet.xml

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

将 web.xml 和dispatcher-servlet.xml 放在同一路径中。

不需要 <context:annotation-config />因为它已经被组件扫描处理了。请参阅此处:- Difference between <context:annotation-config> vs <context:component-scan>和<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>

确保/WEB-INF/jsp/register.jsp 中存在 register.jsp。

如果问题仍未解决，您需要共享您的服务器日志。