我試圖編譯和運行在這個倉庫的一些基本的Java代碼: https://github.com/jasebell/mlbookexamples機器學習Maven構建 - 我如何得到它的工作?
舉個例子,Java文件夾,裏面chapter2.BritneyDilemma。
我試圖用maven來做這件事(因爲有一個pom.xml),但我覺得有一些東西讓我失望。我對Maven瞭解不多,我的背景是C和cmake。乍一看,我可以看出爲什麼人們討厭Maven。該項目似乎並沒有完全配置的pom.xml /顯得相當不規範:
- ,只拉下一些依賴,例如BritneyDilemma要求classifier4J但這不是在pom.xml提及。
- 當我做任何簡單的命令mvn安裝/編譯等,輸出到目標基本上什麼都沒有(這是一個幾乎是空的jar)。
我已經試過各種方法,如:
- 修改的pom.xml在maven assembly plugin添加和運行
mvn clean compile package
。最多我設法得到一個打包pom.xml依賴關係的jar,但由於沒有classifier4j仍然無法編譯BritneyDilemma(這在pom.xml中沒有提及,所以我不確定maven應該知道該怎麼做這是一個要求/從哪裏拉)。 - 遠離maven,下載classifer4j並通過命令行進行編譯。運行時錯誤和一些調查指出,我錯過了一些classifier4j dependency,我認爲這是因爲我離開了maven,否則這將被一些遞歸建築物照顧。
這是一個庫存增加的嘗試,作出任何修改/取的pom.xml如:
~/projects/mlbookexamples/java (master) $ mvn install
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building mlbook
[INFO] task-segment: [install]
[INFO] ------------------------------------------------------------------------
[INFO] [resources:resources {execution: default-resources}]
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /home/alex/projects/mlbookexamples/java/src/main/resources
Downloading: http://repo.springsource.org/libs-milestone//javax/batch/javax.batch-api/1.0/javax.batch-api-1.0.jar
34K downloaded (javax.batch-api-1.0.jar)
[INFO] [compiler:compile {execution: default-compile}]
[INFO] No sources to compile
[INFO] [resources:testResources {execution: default-testResources}]
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /home/alex/projects/mlbookexamples/java/src/test/resources
[INFO] [compiler:testCompile {execution: default-testCompile}]
[INFO] No sources to compile
[INFO] [surefire:test {execution: default-test}]
[INFO] No tests to run.
[INFO] Surefire report directory: /home/alex/projects/mlbookexamples/java/target/surefire-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Results :
Tests run: 0, Failures: 0, Errors: 0, Skipped: 0
[INFO] [jar:jar {execution: default-jar}]
[WARNING] JAR will be empty - no content was marked for inclusion!
[INFO] Building jar: /home/alex/projects/mlbookexamples/java/target/mlbookexamples-1.0-SNAPSHOT.jar
[INFO] [install:install {execution: default-install}]
[INFO] Installing /home/alex/projects/mlbookexamples/java/target/mlbookexamples-1.0-SNAPSHOT.jar to /home/alex/.m2/repository/com/datasentiment/mlbook/mlbookexamples/1.0-SNAPSHOT/mlbookexamples-1.0-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6 seconds
[INFO] Finished at: Wed Mar 04 08:38:56 NZDT 2015
[INFO] Final Memory: 33M/249M
[INFO] ------------------------------------------------------------------------
~/projects/mlbookexamples/java/target (master) $ java -jar mlbookexamples-1.0-SNAPSHOT.jar
no main manifest attribute, in mlbookexamples-1.0-SNAPSHOT.jar
我跑的Arch Linux。
我不知道如何在Linux上獲得它,但您需要安裝Maven - 在Windows中,您將其添加到Path變量以獲取與Maven關聯的'mvn'programm,然後在文件夾中運行'mvn clean install' pom.xml文件仍然存在 - Maven會通知您有關pom.xml的任何問題 – JBA 2015-03-03 12:07:00
我認爲您將能夠儘快處理Linux Part - > http://maven.apache.org/download.cgi 'mvn'命令被識別出來,你可以在pom.xml文件所在的文件夾中使用'mvn clean install'來構建示例 – JBA 2015-03-03 12:14:18
我已經安裝了maven,'mvn clean install'將不起作用是多個主要實例(每個章節大約一個左右)。一個mvn的安裝沒有下載一半的互聯網到〜/ .m2,我不知道這是如何讓我前進,因爲在目標文件夾裏面還有一個[基本]空的jar文件。如果從項目中查看pom.xml,您會看到它只列出了一些存儲庫,因此我不確定它的全部用途是什麼:https://github.com/jasebell/mlbookexamples/blob/master/的Java/pom.xml的 – Stiege 2015-03-03 19:13:57