Spring Boot 应用程序未在独立的 tomcat 中加载答案

【问题标题】：Spring boot app not loading in standalone tomcatSpring Boot 应用程序未在独立的 tomcat 中加载
【发布时间】：2017-07-04 11:41:23
【问题描述】：

我正在尝试在独立的 tomcat 中运行一个简单的 Spring Boot 应用程序。我已经尝试关注参考文档和一些问题/答案，但似乎没有任何效果。当 tomcat 启动时，它会部署应用程序，但完全忽略我的 Application 类，因此不会加载任何 spring 代码。我确定它一定是我缺少的一些简单的东西，但是......？

这是日志文件中的相关输出：

INFO: Deploying web application archive C:\dev\servers\apache-tomcat-7.0.75\webapps\bankweb-0.1.war
Feb 15, 2017 4:41:45 PM org.apache.catalina.startup.TldConfig execute
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list o
f JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and
JSP compilation time.
Feb 15, 2017 4:41:45 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deployment of web application archive C:\dev\servers\apache-tomcat-7.0.75\webapps\bankweb-0.1.war has finished in 3,595
 ms

我已根据文档更新了 Application 类以扩展 SpringBootServletInitializer：

@Configuration
@EnableAutoConfiguration
@ComponentScan
public class Application extends SpringBootServletInitializer {

    public static void main(String[] args) {
        SpringApplication.run(applicationClass, args);
    }

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(applicationClass);
    }

    private static Class<Application> applicationClass = Application.class;
}

@RestController
class GreetingController {

    @RequestMapping("/hello/{name}")
    String hello(@PathVariable String name) {
        return "Hello, " + name + "!";
    }
}

在 pom 中，我将包装更改为 war，并将嵌入式 servlet 容器标记为提供：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>it.ankle</groupId>
    <artifactId>bankweb</artifactId>
    <version>0.1</version>
    <packaging>war</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.7</java.version>
        <tomcat.version>7.0.69</tomcat.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jersey</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </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>

【问题讨论】：

我在你的 Application 类中唯一能看到的是我没有的被覆盖的 SpringApplicationBuilder configure() 方法。作为旁注，您可以将@Configuration @EnableAutoConfiguration @ComponentScan 替换为@SpringBootApplication

标签： java tomcat spring-boot

【解决方案1】：

这已解决，用户错误几乎可以概括。我剥离了所有东西以移除所有可选的弹簧模块，让它工作，然后一点一点地添加所有东西，它就工作了。我还不太习惯这种 Spring Boot 的东西，因为你已经在 pom.xml 中配置了一个库，所以它包含了功能。感谢所有花时间阅读的人！

【讨论】：