SpringBoot 打包成war包部署到tomcat（不帶 web.xml檔案 servlet3.0及之後可以不用配置）

在用idea 搭建 spring boot 並打包釋出到外部tomcat部署，原本以為很簡單的事情，沒想到還是遇到了一些異常情況，

找了好多資料都沒有解決問題，今天無意中找到一個方案搞定了，隨寫下用以記錄

途中遇到的異常：

 1.因為最簡單的demo所以沒有用到相關的事物，因此需要在啟動類裡移除TransactionAutoConfiguration 類

   這種錯誤一般是因為載入了元件，但是沒有正確配置，這也就可以通過 exclude 移除掉

  如果出現 DataSourceAutoConfiguration 相關的錯誤 也可以直接移除

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration$EnableTransactionManagementConfiguration$CglibAutoProxyConfiguration]; nested exception is java.lang.IllegalArgumentException: class org.springframework.transaction.annotation.TransactionManagementConfigurationSelector is not assignable to interface org.springframework.context.annotation.ImportSelector
	at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:616) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:296) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:241) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
07-Mar-2018 11:29:39.675 嚴重 [RMI TCP Connection(4)-127.0.0.1] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start: 
	at org.springframework.context.annotation.ConfigurationClassParser.processMemberClasses(ConfigurationClassParser.java:355) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
 org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
	at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:261) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)
	at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:241) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
 

附帶. pom.xml 配置檔案

<dependencies>
   <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>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>-->
<plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-war-plugin</artifactId>
         <configuration>
            <failOnMissingWebXml>false</failOnMissingWebXml>
         </configuration>
      </plugin>
   </plugins>
</build>

. application 啟動類

@SpringBootApplication
@EnableAutoConfiguration(exclude = {TransactionAutoConfiguration.class, DataSourceAutoConfiguration.class})
public class ChatApplication extends SpringBootServletInitializer {

   @Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
      return application.sources(ChatApplication.class);
}
   public static void main(String[] args) {
      SpringApplication.run(ChatApplication.class, args);
}

}