Question

我在intellij中创建了一个maven项目并添加了scala框架支持

此项目名称为 sparkexamples ，我添加了必要的依赖项

以下是项目目录结构。

S:\surender\intellij_1\sparkexamples
S:\surender\intellij_1\sparkexamples\src\main\scala\com\test\spark\examples\DemoMain.scala
S:\surender\intellij_1\sparkexamples\pom.xml

我从命令提示符进入S：\ surender \ intellij_1 \ sparkexamples并开始运行以下mvn命令

 mvn clean compile
 mvn package

运行mvn包之后我可以在cons

中看到

S:\surender\intellij_1\sparkexamples>mvn clean compile
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building spark-examples 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ spark-examples ---
[INFO] Deleting S:\surender\intellij_1\sparkexamples\target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ spark-exam
ples ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered  resources,
i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ spark- examples
---
[INFO] No sources to compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.950 s
[INFO] Finished at: 2017-03-28T10:46:18+01:00
[INFO] Final Memory: 13M/224M
[INFO] ------------------------------------------------------------------------

S:\surender\intellij_1\sparkexamples>mvn package
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building spark-examples 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ spark-exam
ples ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered  resources,
 i.e. build is platform dependent!
 [INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ spark-examples
---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources)  @ sp
ark-examples ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources,
i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory S:\surender\intellij_1\sparkexamples\
 src\test\resources
 [INFO]
 [INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ spark-e
xamples ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ spark- examples ---

[INFO] No tests to run.
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ spark-examples ---
[INFO] Building jar: S:\surender\intellij_1\sparkexamples\target\spark-examples-
1.0-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.651 s
[INFO] Finished at: 2017-03-28T10:47:09+01:00
[INFO] Final Memory: 15M/225M
[INFO] ------------------------------------------------------------------------

S:\surender\intellij_1\sparkexamples>ole that **No Sources to compile**

有人可以帮我解决这个问题吗？

Answer 1

Maven编译器是＆＃34; incremental＆＃34;默认情况下。（这意味着只有编译目标是＆＃34; incremental＆＃34;，默认情况下，Maven仍会让你浏览整个lifecycle。）

当你第一次做的时候：

mvn clean compile

您的来源已编译完毕。（生命周期：你跑到并包括compile生命周期阶段。）

然后你做了：

mvn package

再次调用编译器，并观察到它之前已经完成了它的工作。（生命周期：package是延长compile阶段的生命周期阶段。）

这似乎发生了什么。免责声明：您只包含mvn package的输出。如果您的mvn compile也告诉您没有任何内容可以编译，那么其他内容正在进行中，您可能想要重新解释您的问题（或发布一个新问题）。

此外，如果这个生命周期的事情搞砸了你，还有一个提示：compile是一个生命周期阶段，许多人把它与做某个特定的任务混淆了＃34;它不是。来自mvn -h：

usage: mvn [options] [<goal(s)>] [<phase(s)>]

同样，compile是一个阶段，如果你想做一个目标（＆＃34; task＆＃34;），如果这样做的话只需编译：{{1}}（compiler:compile）。

IntelliJ No Source使用Maven错误编译

1 个答案: