把spring boot项目打war包放在tomcat下启动报错java.lang.NoSuchMethodError: org.apache.tomcat.util.res.StringManage_springboot项目引入hutool工具打war包在tomcat中运行导致提示java.lang-优快云博客

本文介绍了当尝试将Spring Boot项目以war包形式部署到外部Tomcat服务器时遇到的`java.lang.NoSuchMethodError`异常。问题源于Spring Boot内置的Tomcat插件与外部Tomcat的冲突。解决方法包括调整主类配置以适应外部Tomcat环境。

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报错信息如下

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/yxicadmin]]
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:188)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1122)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:819)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1574)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1564)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/yxicadmin]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    ... 6 more
Caused by: java.lang.NoSuchMethodError: org.apache.tomcat.util.res.StringManager.getManager(Ljava/lang/Class;)Lorg/apache/tomcat/util/res/StringManager;
    at org.apache.tomcat.websocket.WsWebSocketContainer.<clinit>(WsWebSocketContainer.java:77)
    at org.apache.tomcat.websocket.server.WsSci.init(WsSci.java:131)
    at org.apache.tomcat.websocket.server.WsSci.onStartup(WsSci.java:47)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5506)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6 more
2017-07-25 17:02:43,802 [main] ERROR org.apache.catalina.core.ContainerBase - A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:188)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1122)
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:739)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:689)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

首先spring boot项目有两种启动方式：main方法启动和tomcat启动。需要搞清楚的是spring boot之所以能够由main启动是因为它内置了tomcat插件。之前我一直是用这种方法启动测试的，这个时候pom.xml中是不需要对tomcat做任何配置的，正常启动结果如下:

当需要设置tomcat启动的时候，原来的主类需要做如下改动：

public class MainApplication extends SpringBootServletInitializer {
	protected SpringApplicationBuilder configure(
			SpringApplicationBuilder application) {
		return application.sources(MainApplication.class);
	}

	public static void main(String[] args) throws Exception {
		SpringApplication.run(MainApplication.class, args);
}

如果此时直接把项目打个war包放在tomcat启动则会包开始的那个错误。其实就是tomcat冲突引起的，需要在pom.xml中解除原始的tomcat依赖，在网上查找的资料说添加如下配置，经过测试发现并没有什么卵用:

<exclusions>
	<exclusion>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-tomcat</artifactId>
	</exclusion>
</exclusions>

所以干脆简单粗暴一点，使用如下配置:

<exclusions>
	<exclusion>
		<groupId>org.apache.tomcat.embed</groupId>
		<artifactId>tomcat-embed-core</artifactId>
	</exclusion>
	<exclusion>
		<groupId>org.apache.tomcat.embed</groupId>
		<artifactId>tomcat-embed-el</artifactId>
	</exclusion>
	<exclusion>
		<groupId>org.apache.tomcat.embed</groupId>
		<artifactId>tomcat-embed-websocket</artifactId>
	</exclusion>
</exclusions>

启动，正常运行: