我正在学习Spring MVC,而且几乎在开始时就陷入困境。我已经关注了有关创建第一个MVC应用程序的视频,但这对我不起作用。我想将main.jsp作为起始页面,在配置之后但是页面没有加载,我一直都是404。我已经创建了一个新的Maven项目。然后我为项目添加Spring MVC框架支持,为Spring配置创建web.xml和spring-mvc-demo-servlet。我已经多次检查过我的项目,但没有成功。此外,我已检查过类似的主题,但也无法找到解决方案。
pom.hml
<?xml version="1.0" encoding="UTF-8"?>
HTTP://maven.Apache.org/下水道/maven-4.0.0.下水道"> 4.0.0
<groupId>group</groupId>
<artifactId>artifact</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<spring.version>5.0.4.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
VEB.HML
<?xml version="1.0" encoding="UTF-8"?>
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd“id =”WebApp_ID“version =”3.1“>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-mvc-demo-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Spring的MVC-演示servlet.xml中
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- Step 3: Add support for component scanning -->
<context:component-scan base-package="com.test.spring" />
<!-- Step 4: Add support for conversion, formatting and validation support -->
<mvc:annotation-driven/>
<!-- Step 5: Define Spring MVC view resolver -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
HomeController的
package com.test.spring;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HomeController {
@RequestMapping("/")
public String showPage() {
return "main";
}
我认为WebApplicationInitalizer从Spring 5和Intellij开始更简单。
1)将WebMvcConfig
类添加到com.test.spring
包中,如下所示:
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = { "com.test.spring"})
public class WebMvcConfig implements WebMvcConfigurer {
@Bean
public InternalResourceViewResolver resolver() {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setViewClass(JstlView.class);
resolver.setPrefix("/WEB-INF/views/");
resolver.setSuffix(".jsp");
return resolver;
}
2)将您的WEB-INF文件夹移动到一个新文件夹src/main/webapp
(mabe,你可以通过右键单击它将它作为源文件夹)
3)删除您的web.xml
和spring-mvc-demo-servlet.xml
文件以及所有旧的Web文件夹
4)添加应用程序初始化程序
public class AppInitializer extends
AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
最后右键单击AppInitializer类,然后运行它...
Optionnally,您可以将Tomcat添加到Maven pom.xml
,然后运行命令mvn tomcat7:run
:
<build>
<plugins>
...
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
</configuration>
</plugin>
<plugins>
<build>
希望对你有帮助
感谢你的回答Karbos,但我必须找到完全针对我提供的来源的解决方案,否则我将无法继续Udemy的课程......
我解决了这个问题,但最令人毛骨悚然的一刻是,我不知道我是如何做到的。我在项目中添加了一些更改。 web.xml中的更改
<servlet>
<servlet-name>my-dispatcher-servlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>WEB-INF/dispatcher-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
pom.xml中的更改
<packaging>war</packaging>
和其他一些我可能没有注意到原因是自动完成的。
所以这个问题花了我一天半的时间。觉得自己这么迟钝......