SpringBoot Gradle 报错整理

最近有个需求要在本地进行测试，需要打包，但是 Gradle 又不熟悉，打包的时候报错，故整理之，以供后人瞻仰。。。

1. 报错信息：

   10:36:48 AM: Executing task 'bootRepackage'...
   FAILURE: Build failed with an exception.
   * Where:
   Build file '/Users/yyyy/Documents/Git/GitLab/xxx/build.gradle' line: 23
   * What went wrong:
   A problem occurred evaluating root project 'datacenter'.
   > Failed to apply plugin [class 'io.spring.gradle.dependencymanagement.DependencyManagementPlugin']
      > Could not create task of type 'DependencyManagementReportTask'.
   * Try:
   Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
   BUILD FAILED    
   Total time:     0.469 secs
   No service o    f type StyledTextOutputFactory available in ProjectScopeServices.
   Open File    
   10:36:49 AM:     Task execution finished 'bootRepackage'.
   

   • 问题解决：在build.gradle中的buildscript→dependencies中添加如下依赖(版本自己斟酌一下)：

     classpath 'io.spring.gradle:dependency-management-plugin:0.6.1.RELEASE'
     

2. 单独使用 jar 打包，运行报错：

   java -jar  project.jar
   Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication
   at com.ainemo.Application.main(Application.java:13)
   Caused by: java.lang.ClassNotFoundException: org.springframework.boot.SpringApplication
   at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
   ... 1 more
   

   • 问题解决：先使用 jar 打包，再运行 bootRepackage，找到：build/libs/project.jar即可，为何这样做能成功？原因尚不明确，这是急匆匆的解决方案
   • Gradle build 运行即可，如果项目改为了 war，你需要临时干掉 war 的支持，如插件apply plugin: 'war'和war{manifest....