Question

我在Spring中理解RequestMapping时遇到问题，因为它无法正常工作。我要做的是将“/”映射到返回“registration.jsp”，而不是向用户显示填写并返回“greeting.jsp”页面的表单。这是我的代码，但是当我启动我的webapp时，我得到的是/显示注册jsp，当我填充数据时，它进入控制器方法映射/“注册”（我希望它在显示之前发生）注册页面，不是吗？），并且在我点击提交后，处理问候页面的控制器方法没有捕获到该操作。这是我的代码......

控制器：

package org.fabrizio.lastfmmusicrecommender.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
public class LastFmController {

@RequestMapping("/")
public String showRegistration(){
    return "RegistrazioneUtente";
}

@RequestMapping(value="/registrazioneAction", method=RequestMethod.POST)
public String registraUtente(){
    return "greetings";
}
}

我的注册jsp：

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
  <title>Registrazione Utente</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
  <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <h2>Registrazione Utente</h2>
  <form role="form"  action="/registrazioneAction" method="get">
    <div class="form-group">
      <label for="username">Username:</label>
      <input type="text" class="form-control" id="username" placeholder="Enter email">
    </div>
    <div class="form-group">
      <label for="password">Password:</label>
      <input type="password" class="form-control" id="password" placeholder="Enter password">
    </div>
    <div class="checkbox">
      <label><input type="checkbox"> Utente Last.fm?</label>
    </div>
    <button type="submit" class="btn btn-default">Submit</button>
  </form>
</div>

</body>
</html>

的web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<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>LastFmCarMusicRecommender</display-name>
    <welcome-file-list>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>

    <servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/spring-context.xml</param-value>
</init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>

用SpringMVC-servlet.xml中：

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="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="org.fabrizio.lastfmmusicrecommender.controller" />

    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass"
            value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>


</beans>

所以基本上当我启动web-app时，它不会进入控制器（“/”）请求映射，但会正确显示注册表单，因为我填充了该方法内部的数据（如何显示右页如果在显示页面后扫描控制器代码？），但它不会进入我在表单操作中调用的方法。我在日志中得到的是：

    02/02/2015 11:07:43 - DEBUG - (InternalResourceView.java:170) - Forwarding to resource [/WEB-INF/views/RegistrazioneUtente.jsp] in InternalResourceView 'RegistrazioneUtente'
02/02/2015 11:07:44 - DEBUG - (FrameworkServlet.java:996) - Successfully completed request

感谢您的建议，我试图解释并附上尽可能多的有用的东西。

编辑：这是spring-context.xml：

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

    <!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->

    <!-- Enables the Spring MVC @Controller programming model -->
    <annotation-driven />

    <!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
    <resources mapping="/resources/**" location="/resources/" />

    <!-- 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>

    <context:component-scan base-package="org.fabrizio.lastfmmusicrecommender.controller" />
        <mvc:resources mapping="/resources/**" location="/resources/" />


</beans:beans>

Answer 1

我看到的问题是： -

@RequestMapping(value="/registrazioneAction", method=RequestMethod.POST)

映射用于发布请求，但表单已获取

<form role="form"  action="/registrazioneAction" method="get">

将方法从“获取”更改为“发布”希望它解决问题

Answer 2

user3829082使用相同的答案更快（主要是逐行;））

补充：我无法解释为什么你没有在根映射（“/”）中看到任何进展。这对我来说似乎是正确的，它也可以呈现正确的视图。

Spring RequestMapping无法按预期工作

2 个答案: