刚下了个新项目，跑了下maven报错了：
E:\workspace\portalframe>mvn clean install [INFO] Scanning for projects... [WARNING] [WARNING] Some problems were encountered while building the effective model for com.migu.reading.portalFrame:ues:war:trunk-SNAPSHOT [WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: com.portalFrame:commons.mq:jar -> duplicate declaration of version V300R003C20B311 @ line 1031, column 17 [WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: com.portalFrame:axis:jar -> version 0.0.1 vs 1.4 @ line 1164, column 17 [WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: com.portalFrame:com.huawei.uxe.core.render:jar -> version 3.2.21.22 vs 0.0.1 @ line 1230, column 17 [WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: com.portalFrame:commons-codec:jar -> duplicate declaration of version 1.3.2 @ line 1483, column 17 [WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: com.portalFrame:jdom:jar -> version 1.1 vs 0.0.1 @ line 1982, column 17 [WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 2915, column 15 [WARNING] [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. [WARNING] [WARNING] For this reason, future Maven versions might no longer support building such malformed projects. [WARNING] [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building ues trunk-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ ues --- [INFO] Deleting E:\workspace\portalframe\target [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ ues --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 2 resources [INFO] Copying 352 resources [INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ ues --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 4791 source files to E:\workspace\portalframe\target\classes 致命错误: 在类路径或引导类路径中找不到程序包 java.lang [INFO] ------------------------------------------------------------- [ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] An unknown compilation problem occurred [INFO] 1 error [INFO] ------------------------------------------------------------- [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 14.730 s [INFO] Finished at: 2019-01-25T11:37:58+08:00 [INFO] Final Memory: 40M/637M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project ues: Compilation failure [ERROR] An unknown compilation problem occurred [ERROR] -> [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/MojoFailureException
既然是编译错误，那么就考虑下jdk包问题，去看了下pom.xml，发现插件里有这个东西：
<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> <optimize>false</optimize> <debug>false</debug> <showDeprecation>false</showDeprecation> <showWarnings>true</showWarnings> <compilerArguments> <bootclasspath>${java.home}/lib/rt.jar:${java.home}/lib/jce.jar</bootclasspath> </compilerArguments> </configuration> </plugin>
看到bootclasspath就觉得很奇怪，为啥是个冒号来分割呢？一查才知道，冒号是用于linux操作系统的，windows下只能改为分号。改完重新跑maven，这次不再出现该问题了。