在多次尝试解决下面这个简单的谜题后，我感到很沮丧。
我从spring.io创建了一个Web应用程序（war）。非常简单的演示，你可以看看这个git存储库：https://github.com/haigopi/SpringBootGradleStandaloneTomcatWarTest
Had only two classes (DemoApplication.java and ServletInitializer.java)
and a Single application.properties.
运行gradle build将生成一个demo.war（也提交到存储库），我将其复制到tomcat（7 / CentOs）webapps，然后启动服务器。
以下是我的tomcat日志的树结构：
[root@localhost logs]# tree
.
├── catalina.2016-12-25.log
├── host-manager.2016-12-25.log
├── localhost.2016-12-25.log
├── localhost_access_log.2016-12-25.txt
└── manager.2016-12-25.log
localhost.2016-12-25.log文件得到了以下日志：
Dec 25, 2016 5:26:31 PM org.apache.catalina.core.ApplicationContext log
INFO: 2 Spring WebApplicationInitializers detected on classpath
Dec 25, 2016 5:26:33 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring embedded WebApplicationContext
所以catalina.2016-12-25.log：
INFO: Starting Servlet Engine: Apache Tomcat/7.0.69
Dec 25, 2016 5:26:30 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive /var/lib/tomcat/webapps/demo-0.0.1-SNAPSHOT.war
Dec 25, 2016 5:26:31 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 of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
Dec 25, 2016 5:26:35 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deployment of web application archive /var/lib/tomcat/webapps/demo-0.0.1-SNAPSHOT.war has finished in 5,599 ms
Dec 25, 2016 5:26:35 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Dec 25, 2016 5:26:35 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Dec 25, 2016 5:26:35 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 5650 ms
我没有看到弹簧启动应用程序启动时没有打印任何sysouts（来自DemoApplication.java和ServletInitializer），也没有弹簧启动横幅，我也尝试添加一个无法访问的控制器。
有人可以解雇一些吗？
快速查看我正在打印war文件的结构：
[root@localhost demo-0.0.1-SNAPSHOT]# tree
.
├── META-INF
│ └── MANIFEST.MF
├── org
│ └── springframework
│ └── boot
│ └── loader
│ ├── archive
│ │ ├── Archive.class
│ │ ├── Archive$Entry.class
│ │ ├── Archive$EntryFilter.class
│ │ ├── ExplodedArchive$1.class
│ │ ├── ExplodedArchive.class
│ │ ├── ExplodedArchive$FileEntry.class
│ │ ├── ExplodedArchive$FileEntryIterator.class
│ │ ├── ExplodedArchive$FileEntryIterator$EntryComparator.class
│ │ ├── JarFileArchive.class
│ │ ├── JarFileArchive$EntryIterator.class
│ │ └── JarFileArchive$JarFileEntry.class
│ ├── data
│ │ ├── ByteArrayRandomAccessData.class
│ │ ├── RandomAccessData.class
│ │ ├── RandomAccessDataFile.class
│ │ ├── RandomAccessDataFile$DataInputStream.class
│ │ ├── RandomAccessDataFile$FilePool.class
│ │ └── RandomAccessData$ResourceAccess.class
│ ├── ExecutableArchiveLauncher$1.class
│ ├── ExecutableArchiveLauncher.class
│ ├── jar
│ │ ├── AsciiBytes.class
│ │ ├── Bytes.class
│ │ ├── CentralDirectoryEndRecord.class
│ │ ├── CentralDirectoryFileHeader.class
│ │ ├── CentralDirectoryParser.class
│ │ ├── CentralDirectoryVisitor.class
│ │ ├── FileHeader.class
│ │ ├── Handler.class
│ │ ├── JarEntry.class
│ │ ├── JarEntryFilter.class
│ │ ├── JarFile$1.class
│ │ ├── JarFile$2.class
│ │ ├── JarFile$3.class
│ │ ├── JarFile.class
│ │ ├── JarFileEntries$1.class
│ │ ├── JarFileEntries.class
│ │ ├── JarFileEntries$EntryIterator.class
│ │ ├── JarFile$JarFileType.class
│ │ ├── JarURLConnection$1.class
│ │ ├── JarURLConnection.class
│ │ ├── JarURLConnection$JarEntryName.class
│ │ └── ZipInflaterInputStream.class
│ ├── JarLauncher.class
│ ├── LaunchedURLClassLoader$1.class
│ ├── LaunchedURLClassLoader.class
│ ├── Launcher.class
│ ├── MainMethodRunner.class
│ ├── PropertiesLauncher$1.class
│ ├── PropertiesLauncher$ArchiveEntryFilter.class
│ ├── PropertiesLauncher.class
│ ├── PropertiesLauncher$FilteredArchive$1.class
│ ├── PropertiesLauncher$FilteredArchive.class
│ ├── PropertiesLauncher$PrefixMatchingArchiveFilter.class
│ ├── util
│ │ └── SystemPropertyUtils.class
│ └── WarLauncher.class
└── WEB-INF
├── classes
│ ├── application.properties
│ ├── com
│ │ └── example
│ │ ├── DemoApplication.class
│ │ └── ServletInitializer.class
│ ├── static
│ └── templates
├── lib
│ ├── classmate-1.3.3.jar
│ ├── hibernate-validator-5.2.4.Final.jar
│ ├── jackson-annotations-2.8.5.jar
│ ├── jackson-core-2.8.5.jar
│ ├── jackson-databind-2.8.5.jar
│ ├── jboss-logging-3.3.0.Final.jar
│ ├── jcl-over-slf4j-1.7.22.jar
│ ├── jul-to-slf4j-1.7.22.jar
│ ├── log4j-over-slf4j-1.7.22.jar
│ ├── logback-classic-1.1.8.jar
│ ├── logback-core-1.1.8.jar
│ ├── slf4j-api-1.7.22.jar
│ ├── snakeyaml-1.17.jar
│ ├── spring-aop-5.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-beans-5.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-boot-2.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-boot-autoconfigure-2.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-boot-starter-2.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-boot-starter-logging-2.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-boot-starter-web-2.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-context-5.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-core-5.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-expression-5.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-web-5.0.0.BUILD-SNAPSHOT.jar
│ ├── spring-webmvc-5.0.0.BUILD-SNAPSHOT.jar
│ └── validation-api-1.1.0.Final.jar
└── lib-provided
├── spring-boot-starter-tomcat-2.0.0.BUILD-SNAPSHOT.jar
├── tomcat-embed-core-8.5.6.jar
├── tomcat-embed-el-8.5.6.jar
└── tomcat-embed-websocket-8.5.6.jar
和清单文件：
[root@localhost META-INF]# cat MANIFEST.MF
Manifest-Version: 1.0
Start-Class: com.example.DemoApplication
Spring-Boot-Classes: WEB-INF/classes/
Spring-Boot-Lib: WEB-INF/lib/
Spring-Boot-Version: 2.0.0.BUILD-SNAPSHOT
Main-Class: org.springframework.boot.loader.WarLauncher