想要把spring-boot项目按照平常的web项目一样发布到tomcat容器下需要进行下列几个步骤:

一、修改打包形式

在pom.xml里设置

    
     war
    

二、移除嵌入式tomcat插件

在pom.xml里找到spring-boot-starter-web依赖节点,在其中进行如下修改:

        
     
      org.springframework.boot
         
     
      spring-boot-starter-web
         
         
             
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-tomcat
               
          
     
    

三、添加本地调试Tomcat

为了本地调试方便，在pom.xml文件中,dependencies下面添加

            
     
      org.springframework.boot
             
     
      spring-boot-starter-tomcat
             
     
      provided
     
    

四、修改启动类，并重写初始化方法

我们平常用main方法启动的方式，都有一个Application的启动类，代码如下：

@SpringBootApplicationpublic class Application {    public static void main(String[] args) {        SpringApplication.run(Application.class, args);    }}

我们需要类似于web.xml的配置方式来启动spring上下文，在Application类的同级添加一个SpringBootStartApplication类，其代码如下:

/** * @author weixiang.wu *  * 修改启动类，继承 SpringBootServletInitializer 并重写 configure 方法 */@SpringBootApplicationpublic class ImApplication  extends SpringBootServletInitializer {    public static void main(String[] args) {        SpringApplication.run(ImApplication.class, args);    }    @Override    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {        // 注意这里要指向原先用main方法执行的Application启动类        return builder.sources(ImApplication.class);    }}

注意：如果出现以下错误，请尝试更换Tomcat版本

严重: Exception invoking method createStandardContextjavax.management.RuntimeOperationsException: Exception invoking method manageApp	at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:309)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)	at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:619)	at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:566)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)	at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)	at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)	at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401)	at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:361)	at sun.rmi.transport.Transport$1.run(Transport.java:200)	at sun.rmi.transport.Transport$1.run(Transport.java:197)	at java.security.AccessController.doPrivileged(Native Method)	at sun.rmi.transport.Transport.serviceCall(Transport.java:196)	at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)	at java.security.AccessController.doPrivileged(Native Method)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)	at java.lang.Thread.run(Thread.java:748)Caused by: java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1021)	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:993)	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)	at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1900)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)	... 33 more