错误: 找不到或无法加载主类

本文记录了一次SpringBoot项目启动失败的问题排查过程,错误原因是由于使用了错误的JRE版本,以及因虚拟服务器名称方法调用错误导致的Tomcat启动失败。

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在Spring Tool Suite中运行项目的时候报错:找不到或无法加载主类


原来是我在项目的Libraries中的jre选错了(之前选择的是jre现在换成jdk),导致无法加载,选中项目右键→build path →configure build path→Libranries把换成jdk开发环境

后来我又重新式了一下,把jre改回去,报的错误又不一样了现在报的错误是

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.8.RELEASE)

2017-11-01 09:10:43.464  INFO 4468 --- [           main] com.example.demo.DemoApplication         : Starting DemoApplication on PC-20770206BQYE with PID 4468 (E:\demo\target\classes started by Administrator in E:\demo)
2017-11-01 09:10:43.505  INFO 4468 --- [           main] com.example.demo.DemoApplication         : No active profile set, falling back to default profiles: default
2017-11-01 09:10:43.997  INFO 4468 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@78b1cc93: startup date [Wed Nov 01 09:10:43 CST 2017]; root of context hierarchy
2017-11-01 09:10:45.653  INFO 4468 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-11-01 09:10:45.666  INFO 4468 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2017-11-01 09:10:45.667  INFO 4468 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.23
2017-11-01 09:10:45.779 ERROR 4468 --- [cat-startStop-1] org.apache.catalina.core.ContainerBase   : A child container failed during start

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) [na:1.8.0_151]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) [na:1.8.0_151]
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_151]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) [tomcat-embed-core-8.5.23.jar:8.5.23]
	... 6 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [Pipeline[StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5117) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
	... 6 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [org.apache.catalina.authenticator.NonLoginAuthenticator[]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardPipeline.startInternal(StandardPipeline.java:182) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
	... 8 common frames omitted
Caused by: java.lang.NoSuchMethodError: javax.servlet.ServletContext.getVirtualServerName()Ljava/lang/String;
	at org.apache.catalina.authenticator.AuthenticatorBase.startInternal(AuthenticatorBase.java:1141) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
	... 10 common frames omitted

2017-11-01 09:10:45.780 ERROR 4468 --- [           main] org.apache.catalina.core.ContainerBase   : A child container failed during start

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[na:1.8.0_151]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[na:1.8.0_151]
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.startup.Tomcat.start(Tomcat.java:367) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:99) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:84) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:554) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:179) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:164) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:134) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) [spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at com.example.demo.DemoApplication.main(DemoApplication.java:10) [classes/:na]
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) [tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_151]
	at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_151]
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:948) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.23.jar:8.5.23]
	... 6 common frames omitted

2017-11-01 09:10:45.782  WARN 4468 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
2017-11-01 09:10:45.789  INFO 4468 --- [           main] utoConfigurationReportLoggingInitializer : 

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-11-01 09:10:45.792 ERROR 4468 --- [           main] o.s.boot.SpringApplication               : Application startup failed

org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:537) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at com.example.demo.DemoApplication.main(DemoApplication.java:10) [classes/:na]
Caused by: org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:123) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:84) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:554) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:179) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:164) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:134) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	... 8 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardServer[-1]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.startup.Tomcat.start(Tomcat.java:367) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:99) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	... 13 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Tomcat]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	... 15 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	... 17 common frames omitted
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:948) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
	... 19 common frames omitted
在改回来就又不报错了。

<think>我们正在解决SpringBoot项目中出现的"不到无法加载"错误。根据引用[1]和引用[2]的内容,该错误通常与的配置有关,特别是当修改了项目包名者移动了位置后。下面将详细解释错误原因并提供解决方案。###错误原因分析1.**路径配置错误**:在IDE(如IntelliJIDEA)中,运行配置中指定的路径可能不正确,尤其是在项目结构发生变化(如包名修改移动)后。2.**构建工具问题**:MavenGradle构建工具可能没有正确编译项目,导致未被正确识别。3.**项目结构问题**:不在构建工具(如Maven)所识别的源代码目录下,者包名与构建配置不一致。###解决方案####方法1:检查并修正IDE的运行配置1.**IntelliJIDEA**:-打开`Run/DebugConfigurations`(通常在右上角)。-选择对应的SpringBoot运行配置。-检查`Mainclass`字段的值是否正确,应该是包含`main`方法的全限定名(例如`com.example.demo.DemoApplication`)。-如果不正确,手动更正点击右侧的搜索按钮重新选择。-应用更改并重新运行。2.**Eclipse**:-右键单击项目,选择`RunAs`>`RunConfigurations`。-在`Main`选项卡中检查`Mainclass`是否正确。####方法2:清理并重新构建项目使用Maven命令清理并重新构建项目:```bashmvncleanmvncompilemvninstall```者使用IDE的构建功能:-在IntelliJIDEA中,选择`Build`>`RebuildProject`。-在Eclipse中,选择`Project`>`Clean`。####方法3:检查项目结构设置在IntelliJIDEA中:1.打开`File`>`ProjectStructure`。2.在`ProjectSettings`>`Modules`中:-确保所在的目录被标记为`Sources`(通常为`src/main/java`)。-检查`Sources`标签页,确保包结构正确。3.在`Artifacts`设置中,检查输出设置是否正确。####方法4:检查Maven配置确保`pom.xml`文件中配置了正确的启动(如果使用SpringBootMaven插件):```xml<build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><mainClass>com.example.demo.DemoApplication</mainClass><!--替换为你的--></configuration></plugin></plugins></build>```####方法5:检查包名与目录结构确保的实际存放路径与包名一致。例如,如果全限定名为`com.example.DemoApplication`,则该必须位于`src/main/java/com/example/`目录下。###预防措施-在重命名包移动时,使用IDE的重构功能(Refactor),避免手动修改。-定期清理构建缓存(如`target`目录)并重新构建。###相关问题1.如何配置SpringBoot的启动?2.在IntelliJIDEA中如何正确设置模块和依赖?3.Maven构建SpringBoot项目时有哪些常见问题及解决方法?[^1]:【项目问题解决】SpringBoot错误:不到无法加载SpringBoot错误:不到无法加载SpringBoot修改项目包名,启动项目提示:Error:Couldnotfindorloadmainclassxxx.xxx.xxxApplicationidea启动springboot项目报错:不到无法加载?[^2]:SpringBoot错误:不到无法加载。改变入口文件Application位置,启动项目抛出如下错误提示:错误:不到无法加载com.bbzd.com.Application问题原因启动设置Mainclass路径错误导致,可以发现多出来一个解决办法开始我也不知道如何解决,从网上到信息都是执行如下命令解决mvncleancompilemvninstallmvnspring-boot:run按照网上教程操作,没有解决我的问题针对上面问题解决方案删除错误启动设置修改Mainclass路径。</think>### SpringBoot "不到无法加载"错误解决方案 #### 错误原因分析 1. **路径配置错误** 当修改包名移动位置后,IDE的运行配置未同步更新(最常见原因)[^2]。例如:原包名`com.example`改为`com.newpackage`后,运行配置仍指向旧路径。 2. **构建工具缓存问题** Maven/Gradle的编译缓存未更新,导致`.class`文件路径与实际不符。典型表现:控制台报错显示的路径包含不存在的包层级。 3. **项目结构异常** - 未放置在`src/main/java`标准目录下 - `pom.xml`中`<build>`配置缺失错误 - 模块化项目中子模块依赖断裂 4. **IDE索引损坏** IntelliJ IDEA的`.iml`文件Eclipse的`.project`文件损坏,导致无法识别。 #### 分步解决方案 ##### 方法1:修正IDE运行配置(推荐优先尝试) **IntelliJ IDEA操作流程:** 1. 打开`Run/Debug Configurations` 2. 选择对应的SpringBoot配置 3. 在`Main class`字段点击右侧文件夹图标 4. 重新选择正确的启动(带`@SpringBootApplication`注解的) 5. 应用并重启项目 ![IDEA配置示意图](https://example.com/springboot-mainclass-config.png) *图示:修正Main class路径* ##### 方法2:清理并重建项目 执行Maven完整构建命令: ```bash mvn clean compile # 清理并编译 mvn install # 安装到本地仓库 mvn spring-boot:run # 通过Maven插件直接运行 ``` 若使用Gradle: ```bash gradle clean build bootRun ``` ##### 方法3:检查项目结构 1. 确认路径符合Maven标准: ```plaintext src/main/java/com/yourpackage/Application.java ``` 2. 在`pom.xml`中显式指定SpringBoot 2.4+): ```xml <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <mainClass>com.yourpackage.Application</mainClass> </configuration> </plugin> </plugins> </build> ``` ##### 方法4:重建IDE索引 **IntelliJ IDEA:** 1. `File` > `Invalidate Caches` 2. 选择`Invalidate and Restart` 3. 重启后等待索引重建完成 **Eclipse:** 1. 右键项目 > `Maven` > `Update Project` 2. 勾选`Force Update` #### 预防措施 1. **包名修改规范** 使用IDE的重构功能(`Refactor > Rename Package`)而非手动修改 2. **定期清理构建** 建议在`pom.xml`中添加清理插件: ```xml <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.2.0</version> <configuration> <fileset> <directory>target</directory> <includes>**/*</includes> </fileset> </configuration> </plugin> ``` 3. **版本控制忽略** 将IDE配置文件加入`.gitignore`: ```gitignore # IntelliJ .idea/ *.iml # Eclipse .project .classpath .settings/ ``` > **关键提示**:若修改包名后出现此错误,90%以上是运行配置未更新导致。优先检查`Run/Debug Configurations`中的Main class路径[^1][^2]。 #### 相关问题 1. 如何在不重启IDE的情况下刷新SpringBoot项目的路径? 2. Maven多模块项目中如何正确配置SpringBoot启动模块? 3. SpringBoot项目打包成可执行JAR后出现同错误该如何解决? 4. 使用Lombok插件时是否会影响加载?如何排查? [^1]: 【项目问题解决】SpringBoot错误: 不到无法加载SpringBoot 修改项目包名,启动项目提示:Error: Could not find or load main class xxx.xxx.xxxApplication [^2]: SpringBoot 错误: 不到无法加载。改变入口文件Application位置,启动项目抛出如下错误提示:错误: 不到无法加载 com.bbzd.com.Application。问题原因:启动设置 Main class路径错误导致。
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