springboot父子类项目，打war包不成功，打包成功后放到Tomcat中不启动

落日映苍穹つ 2021-09-23 10:14 434阅读 0赞

今天打包父子项目，起先包如下错误

\[ERROR\] Plugin org.apache.maven.plugins:maven-jar-plugin:2.4 or one of its dependencies could not be resolved: Failure to find org.apache.maven.plugins:maven-jar-plugin:jar:2.4 in *http://localhost:8081/nexus/content/groups/public* was cached in the local repository, resolution will not be reattempted until the update interval of nexus has elapsed or updates are forced -> \[Help 1\]  
\[ERROR\]   
\[ERROR\] To see the full stack trace of the errors, re-run Maven with the -e switch.  
\[ERROR\] Re-run Maven using the -X switch to enable full debug logging.  
\[ERROR\]   
\[ERROR\] For more information about the errors and possible solutions, please read the following articles:  
\[ERROR\] \[Help 1\] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException

之类的错误

解决办法：在idea中，或者在cmd命令窗口，切换到项目路径下执行

1、执行 mvn clean,之后执行 mvn install

2、成功后，会在target目录下创建 所打的包.war和.war.original

3、打开cmd命令窗口，切换到war包所在路径，输入 java -jar war包，启动项目

![20191029162628189.png][]

4、发现war包在Tomcat中不能启动，Tomcat可以正常运行，不启动项目

原因：springboot项目没有启动类，

解决办法：在springboot启动类同目录下，新建如下类

import org.springframework.boot.builder.SpringApplicationBuilder;
    import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
    
    /**
     * 修改启动类，继承 SpringBootServletInitializer 并重写 configure 方法
     */
    public class SpringBootStartApplication extends SpringBootServletInitializer {
     
        @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(AdminApplication.class);
        }
    
    }

\*其他原因可参考[https://yq.aliyun.com/articles/58273][https_yq.aliyun.com_articles_58273]

[20191029162628189.png]: /images/20210923/3887d0cff9f44fe9a963a45ef52f4261.png
[https_yq.aliyun.com_articles_58273]: https://yq.aliyun.com/articles/58273