java diamond 运算符_请使用 -source 7 或更高版本以启用 diamond 运算符-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_30670053/article/details/114515285

在构建项目时遇到了Maven编译失败的问题，错误信息表明源代码中使用了Java 1.5不支持的try-with-resources和diamond运算符。这需要将项目的Java编译源代码级别提升到1.7或更高才能解决。

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[INFO] -------------------------------------------------------------

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 3.497 s

[INFO] Finished at: 2017-02-23T16:30:37+08:00

[INFO] Final Memory: 10M/150M

[INFO] ------------------------------------------------------------------------

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project core: Compilation failure: Compilation failure:

[ERROR] /D:/workSpaces/MyEclipse 2016/ecs/core/src/main/java/com/chinatelecom/ecs/core/common/util/HttpClientUtil.java:[59,13] -source 1.5 中不支持 try-with-resources

[ERROR] (请使用 -source 7 或更高版本以启用 try-with-resources)

[ERROR] /D:/workSpaces/MyEclipse 2016/ecs/core/src/main/java/com/chinatelecom/ecs/core/common/util/URLUtil.java:[146,54] -source 1.5 中不支持 diamond 运算符

[ERROR](请使用 -source 7 或更高版本以启用 diamond 运算符)

[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