大家好，我是烤鸭：   

    关于springboot war包部署tomcat。

    环境：

        springboot 2.0.3.RELEASE

        apache-tomcat-8.5.32

1.    修改pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://maven.apache.org/POM/4.0.0"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><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.3.RELEASE</version></parent><groupId>com.xxx.xxx</groupId><version>1.0.0-SNAPSHOT</version><artifactId>xxx_xxxx_interface</artifactId><packaging>war</packaging><name>xxx_xxxx_interface</name><description>xxx接口</description><properties><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target><maven.compiler.encoding>UTF-8</maven.compiler.encoding><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.build.locales>zh_CN</project.build.locales></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency></dependencies><profiles><profile><!--本地开发环境 --><id>dev</id><properties><profiles.active>dev</profiles.active></properties><activation><activeByDefault>true</activeByDefault></activation></profile><profile><!--测试环境 --><id>test</id><properties><profiles.active>test</profiles.active></properties></profile><profile><!--生产环境 --><id>pro</id><properties><profiles.active>pro</profiles.active></properties></profile></profiles><build><finalName>xxxx_interface</finalName> <!-- 指定package生成的文件名为my-spring-boot.jar --><resources><!-- 所有环境配置文件过滤 --><resource><directory>src/main/resources</directory><filtering>true</filtering><excludes><exclude>test/*</exclude><exclude>pro/*</exclude><exclude>dev/*</exclude></excludes></resource><!-- 指定环境配置文件导入 --><resource><directory>src/main/resources/${profiles.active}</directory></resource></resources><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><source>1.8</source><target>1.8</target><delimiters><delimiter>@</delimiter></delimiters><useDefaultDelimiters>false</useDefaultDelimiters><archive><manifest><addClasspath>true</addClasspath><useUniqueVersions>false</useUniqueVersions><classpathPrefix>lib/</classpathPrefix><mainClass>xxx.xxx.xxxInterfaceMainApplication</mainClass></manifest><manifestEntries><version>${project.version}</version></manifestEntries></archive></configuration></plugin></plugins></build>
</project>

网上很多人都说需要再加忽略内置tomcat,或者servlet.api的包，其实都不需要。

主要就是   

    

        <parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.3.RELEASE</version></parent>

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

<packaging>war</packaging>

<parent>     spring-boot-starter-parent    </parent>

<dependency>         spring-boot-starter-web    </dependency>

 <packaging> war </packaging>

2.    修改启动方法

package com.xxx.xxxx.config;import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executors;import javax.annotation.PostConstruct;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;
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.stereotype.Controller;@Configuration
@EnableAutoConfiguration
@ComponentScan(value = "com.xxx.xxxx", excludeFilters = { @Filter(Controller.class),@Filter(type = FilterType.ASSIGNABLE_TYPE, value = { RootConfiguration.class }) })
@MapperScan({"com.xxx.xxxx.dao"})
public class RootConfiguration extends SpringBootServletInitializer {@PostConstructpublic void postConstruct() {}@Overrideprotected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {return configureApplication(builder);}public static void main(String[] args) {configureApplication(new SpringApplicationBuilder()).run(args);}private static SpringApplicationBuilder configureApplication(SpringApplicationBuilder builder) {return builder.sources(RootConfiguration.class);}}

主要就是继承 SpringBootServletInitializer ，重写 configure 方法。

3.    问题及猜想

    之前的项目就是这么配置的，用的springboot 1.5.6.RELEASE，是没有问题的。

     改了新项目，升级了springboot，也加了很多东西，项目就起不来了。

     本地run方法运行是没有问题的。

    3.1 问题 ：

        启动卡死：

    这是tomcat下log日志的最后几行，乍一看并没有什么问题。但是总觉得哪里不对。访问tomcat也访问不到。

[2018-07-04 06:48:10.199] [main] [DEBUG] o.h.validator.internal.xml.ValidationXmlParser - No META-INF/validation.xml found. Using annotation based configuration only.
[2018-07-04 06:48:10.205] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.springframework.validation.beanvalidation.LocaleContextMessageInterpolator as ValidatorFactory-scoped message interpolator.
[2018-07-04 06:48:10.206] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.resolver.TraverseAllTraversableResolver as ValidatorFactory-scoped traversable resolver.
[2018-07-04 06:48:10.206] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.util.ExecutableParameterNameProvider as ValidatorFactory-scoped parameter name provider.
[2018-07-04 06:48:10.206] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.DefaultClockProvider as ValidatorFactory-scoped clock provider.
[2018-07-04 06:48:10.207] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.scripting.DefaultScriptEvaluatorFactory as ValidatorFactory-scoped script evaluator factory.
[2018-07-04 06:48:10.654] [main] [WARN ] org.thymeleaf.templatemode.TemplateMode - [THYMELEAF][main] Template Mode 'HTML5' is deprecated. Using Template Mode 'HTML' instead.
[2018-07-04 06:48:10.823] [main] [INFO ] org.apache.coyote.http11.Http11NioProtocol - Starting ProtocolHandler [http-nio-8161]
[2018-07-04 06:48:10.839] [main] [INFO ] org.apache.tomcat.util.net.NioSelectorPool - Using a shared selector for servlet write/read
[2018-07-04 06:48:10.877] [main] [INFO ] com.xx.xx.xxxInterfaceMainApplication - Started xxxInterfaceMainApplication in 5.237 seconds (JVM running for 5.691)

或者卡在这：

[2018-07-04 06:48:10.056] [main] [DEBUG] o.h.validator.internal.engine.ConfigurationImpl - Setting custom MessageInterpolator of type org.springframework.validation.beanvalidation.LocaleContextMessageInterpolator
[2018-07-04 06:48:10.057] [main] [DEBUG] o.h.validator.internal.engine.ConfigurationImpl - Setting custom ConstraintValidatorFactory of type org.springframework.validation.beanvalidation.SpringConstraintValidatorFactory
[2018-07-04 06:48:10.057] [main] [DEBUG] o.h.validator.internal.engine.ConfigurationImpl - Setting custom ParameterNameProvider of type org.springframework.validation.beanvalidation.LocalValidatorFactoryBean$1
[2018-07-04 06:48:10.059] [main] [DEBUG] o.h.validator.internal.xml.ValidationXmlParser - Trying to load META-INF/validation.xml for XML based Validator configuration.
[2018-07-04 06:48:10.059] [main] [DEBUG] o.h.validator.internal.xml.ResourceLoaderHelper - Trying to load META-INF/validation.xml via user class loader
[2018-07-04 06:48:10.059] [main] [DEBUG] o.h.validator.internal.xml.ResourceLoaderHelper - Trying to load META-INF/validation.xml via TCCL
[2018-07-04 06:48:10.060] [main] [DEBUG] o.h.validator.internal.xml.ResourceLoaderHelper - Trying to load META-INF/validation.xml via Hibernate Validator's class loader
[2018-07-04 06:48:10.060] [main] [DEBUG] o.h.validator.internal.xml.ValidationXmlParser - No META-INF/validation.xml found. Using annotation based configuration only.
[2018-07-04 06:48:10.067] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.springframework.validation.beanvalidation.LocaleContextMessageInterpolator as ValidatorFactory-scoped message interpolator.
[2018-07-04 06:48:10.067] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.resolver.TraverseAllTraversableResolver as ValidatorFactory-scoped traversable resolver.
[2018-07-04 06:48:10.067] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.util.ExecutableParameterNameProvider as ValidatorFactory-scoped parameter name provider.
[2018-07-04 06:48:10.068] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.DefaultClockProvider as ValidatorFactory-scoped clock provider.
[2018-07-04 06:48:10.068] [main] [DEBUG] o.h.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.scripting.DefaultScriptEvaluatorFactory as ValidatorFactory-scoped script evaluator factory.
[2018-07-04 06:48:10.189] [main] [DEBUG] o.h.v.i.engine.resolver.TraversableResolvers - Cannot find javax.persistence.Persistence on classpath. Assuming non JPA 2 environment. All properties will per default be traversable.

或者卡在springboot读取banner之后。

    

    这种问题真的是难找，也不报错。

    3.2    猜想：

        1    是不是springboot版本升级导致的问题，第一时间降版本，无效。

        2    是不是引了多余的包，导致jar包冲突，解决了之后，无效。

        3    tomcat本身问题，换tomcat版本，保证tomcat是没问题的，无效。

            如果这些都做了，还是无效的话，考虑一下是不是代码的问题。

我尝试注释掉部分代码，再打包启动，如果成功了，就说明代码部分有问题。最后找到了代码中的问题。

问题代码：

/*** * 定时任务回调轮询*/
@Component
public class TaskUpdateNotify implements CommandLineRunner {public static Log logger = LogFactory.getLog(TaskUpdateNotify.class);public static final long timeFlag = 1000;@Autowiredprivate RedisClient redisClient;@Autowiredprivate ThreadHandler threadHandler;/*** 25小时以内完成8次通知（通知的间隔频率一般是：4m,10m,10m,1h,2h,6h,15h） 异步通知回调*/@Overridepublic void run(String... args) throws Exception {while (true) {// 先处理发二维码threadHandler.doNotifyAgainHandler();	//threadHandler.doPayNotifyAgainHandler();	//多线程方法//线成休息 1 minTimeUnit.MINUTES.sleep(1);}}
}

我怀疑原因是在实现 CommandLineRunner 接口，并在我在方法中 TimeUnit.MINUTES.sleep(1) 。

        之后把这个方法改成了定时任务，又取消了线程sleep，就可以启动了。

最后贴一下：

    启动成功的日志最后几行，应该是有tomcat容器启动的。

6-Jul-2018 06:14:03.022 信息 [localhost-startStop-1] org.springframework.boot.StartupInfoLogger.logStarted Started RootConfiguration in 6.223 seconds (JVM running for 12.622)
06-Jul-2018 06:14:03.063 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\preauth_interface.war] has finished in [10,773] ms
06-Jul-2018 06:14:03.064 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\docs]
06-Jul-2018 06:14:03.086 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\docs] has finished in [22] ms
06-Jul-2018 06:14:03.086 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\examples]
06-Jul-2018 06:14:03.357 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\examples] has finished in [271] ms
06-Jul-2018 06:14:03.357 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\host-manager]
06-Jul-2018 06:14:03.386 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\host-manager] has finished in [29] ms
06-Jul-2018 06:14:03.386 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\manager]
06-Jul-2018 06:14:03.409 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\manager] has finished in [23] ms
06-Jul-2018 06:14:03.410 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\ROOT]
06-Jul-2018 06:14:03.432 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [G:\develop\environment\apache-tomcat-8.5.32-1\webapps\ROOT] has finished in [22] ms
06-Jul-2018 06:14:03.441 信息 [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"]
06-Jul-2018 06:14:03.455 信息 [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]
06-Jul-2018 06:14:03.462 信息 [main] org.apache.catalina.startup.Catalina.start Server startup in 11229 ms

4.    总结

    如果有报错信息一切都好说，最怕的就是这样，找不到原因。只能一点点摸索，算是分享一下吧。每个人的原因不可能一样。这种问题只能慢慢找了。多尝试几次，如果还是找不到。

    就用 jar包方式 运行 springboot 项目。如果有 静态页面，就前后端分离，简单的方式 Nginx。