Spring框架无法启动嵌入式容器

本文介绍了Spring框架无法启动嵌入式容器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在关注Spring in Action第4版第5章，但我坚持第一个例子。

I'm following Spring in Action 4th Edition Chapter 5, but I'm stuck at the very first example.

这是我的Eclipse Luna项目结构：

Here is my Eclipse Luna project structure:

如果我将此项目作为Spring Boot App运行，那么它会抛出异常：

If I run this project as Spring Boot App, then it throws exceptions:

org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean. at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:133) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:474) at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686) at org.springframework.boot.SpringApplication.run(SpringApplication.java:320) at org.springframework.boot.SpringApplication.run(SpringApplication.java:957) at org.springframework.boot.SpringApplication.run(SpringApplication.java:946) at spittr.SpittrApplication.main(SpittrApplication.java:10) Caused by: org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean. at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.getEmbeddedServletContainerFactory(EmbeddedWebApplicationContext.java:183) at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:156) at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:130) ... 7 common frames omitted

如何解决这个问题？

所有文件的内容：

SpittrApplication.java：

SpittrApplication.java:

package spittr; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class SpittrApplication { public static void main(String[] args) { SpringApplication.run(SpittrApplication.class, args); } }

SpittrWebAppInitializer.java：

SpittrWebAppInitializer.java:

package spittr.config; import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer; public class SpittrWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer { @Override protected String[] getServletMappings() { return new String[] { "/" }; } @Override protected Class<?>[] getRootConfigClasses() { return new Class<?>[] { RootConfig.class }; } @Override protected Class<?>[] getServletConfigClasses() { return new Class<?>[] { WebConfig.class }; } }

WebConfig.java：

WebConfig.java:

package spittr.config; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.ViewResolver; import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer; import org.springframework.web.servlet.config.annotation.EnableWebMvc; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; import org.springframework.web.servlet.view.InternalResourceViewResolver; @Configuration @EnableWebMvc @ComponentScan("spittr.web") public class WebConfig extends WebMvcConfigurerAdapter { @Bean public ViewResolver viewResolver() { InternalResourceViewResolver resolver = new InternalResourceViewResolver(); resolver.setPrefix("/WEB-INF/views/"); resolver.setSuffix(".jsp"); resolver.setExposeContextBeansAsAttributes(true); return resolver; } @Override public void configureDefaultServletHandling( DefaultServletHandlerConfigurer configurer) { configurer.enable(); } }

RootConfig.java：

RootConfig.java:

package spittr.config; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.ComponentScan.Filter; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.FilterType; import org.springframework.web.servlet.config.annotation.EnableWebMvc; @Configuration @ComponentScan(basePackages = { "spitter" }, excludeFilters = { @Filter(type = FilterType.ANNOTATION, value = EnableWebMvc.class) }) public class RootConfig { }

HomeController.java：

HomeController.java:

package spittr.web; import static org.springframework.web.bind.annotation.RequestMethod.*; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @Controller public class HomeController { @RequestMapping(value = "/", method = GET) public String home() { return "home"; } }

home.jsp：

<%@ taglib uri="java.sun/jsp/jstl/core" prefix="c" %> <%@ page session="false" %> <html> <head> <title>Spittr</title> <link rel="stylesheet" type="text/css" href="<c:url value="/resources/style.css" />" > </head> <body> <h1>Welcome to Spittr</h1> <a href="<c:url value="/spittles" />">Spittles</a> | <a href="<c:url value="/spitter/register" />">Register</a> </body> </html>

pom.xml

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="maven.apache/POM/4.0.0" xmlns:xsi="www.w3/2001/XMLSchema-instance" xsi:schemaLocation="maven.apache/POM/4.0.0 maven.apache/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.spittr</groupId> <artifactId>spittr</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>spittr</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.2.4.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>

推荐答案

使用Spring Boot时，不应包含其他Spring直接依赖，但依赖于Boot自己的依赖关系管理。使用提供的starters时，您可以确保所有需要的库都包含在匹配版本中。

When using Spring Boot you should not include the other Spring dependencies directly, but rely on Boot's own dependency management. When using the provided "starters" you can be sure that all needed libraries will be included in a matching version.

而不是包含 spring-mvc pom.xml中的工件：

Instead of including spring-mvc artifact in your pom.xml:

<dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> </dependency>

使用专用的Boot starter for webapps， spring-boot-starter-web ：

use the dedicated Boot starter for webapps, spring-boot-starter-web:

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>

官方指南

我相信你的pom.xml的其他部分也是多余的（spring-boot-starter，javax.servlet-api，spring-boot-maven-plugin）