参考文献と先人の知恵
- Maven – Welcome to Apache Maven
- 【超初心者向け】Maven超入門
- よく使うMavenコマンド集
- java - Can't execute jar- file: "no main manifest attribute" - Stack Overflow
手順
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OpenJDK をインストールする。
sudo yum -y install java-1.8.0-openjdk-devel
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Maven – Welcome to Apache Maven にアクセスする。
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画面左側の About Maven より, Download をクリックする。
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Binary tar.gz archive の Link を右クリックし, URL をコピーする。
- 今回は apache-maven-3.5.4-bin.tar.gz とする。
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Maven をダウンロードする。Tera Term を使用している場合, リンクは右クリックで貼り付けられる。
cd /usr/local/src; pwd sudo curl -LO <URL>
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Maven を展開する。
cd ..; pwd gunzip -c src/apache-maven-3.5.4-bin.tar.gz | sudo tar -xpf - sudo ln -sv apache-maven-3.5.4 apache-maven
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Maven への PATH を設定する。
cd; pwd cp -aiv .bash_profile .bash_profile.`date +%Y%m%d` echo 'PATH=/usr/local/apache-maven/bin:${PATH}' >> .bash_profile
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再ログインし, mvn コマンドが使用できることを確認する。
mvn -version
Apache Maven 3.5.4 (1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-18T03:33:14+09:00) Maven home: /usr/local/apache-maven Java version: 1.8.0_181, vendor: Oracle Corporation, runtime: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.181-3.b13.el7_5.x86_64/jre Default locale: ja_JP, platform encoding: UTF-8 OS name: "linux", version: "3.10.0-862.11.6.el7.x86_64", arch: "amd64", family: "unix"
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プロジェクトのひな形を作成する。
mkdir -v /var/tmp/maven cd /var/tmp/maven; pwd mvn archetype:generate
[INFO] Scanning for projects... Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom (3.9 kB at 2.6 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-plugins/22/maven-plugins-22.pom (中略) 2244: remote -> xyz.luan.generator:xyz-generator (-) Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): 1252: ★ Enter キー押下 Choose org.apache.maven.archetypes:maven-archetype-quickstart version: 1: 1.0-alpha-1 2: 1.0-alpha-2 3: 1.0-alpha-3 4: 1.0-alpha-4 5: 1.0 6: 1.1 7: 1.3 Choose a number: 7: ★ Enter キー押下 Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/archetypes/maven-archetype-quickstart/1.3/maven-archetype-quickstart-1.3.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/archetypes/maven-archetype-quickstart/1.3/maven-archetype-quickstart-1.3.pom (1.6 kB at 7.1 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/archetypes/maven-archetype-bundles/1.3/maven-archetype-bundles-1.3.pom (中略) Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/archetypes/maven-archetype-quickstart/1.3/maven-archetype-quickstart-1.3.jar (7.0 kB at 30 kB/s) Define value for property 'groupId': ★ "com.myapp" と入力 Define value for property 'artifactId': ★ "myapp" と入力 Define value for property 'version' 1.0-SNAPSHOT: : ★ Enter キー押下 Define value for property 'package' com.myapp: : ★ Enter キー押下 Confirm properties configuration: groupId: com.myapp artifactId: myapp version: 1.0-SNAPSHOT package: com.myapp Y: : ★ Enter キー押下 [INFO] ---------------------------------------------------------------------------- [INFO] Using following parameters for creating project from Archetype: maven-archetype-quickstart:1.3 [INFO] ---------------------------------------------------------------------------- [INFO] Parameter: groupId, Value: com.myapp [INFO] Parameter: artifactId, Value: myapp [INFO] Parameter: version, Value: 1.0-SNAPSHOT [INFO] Parameter: package, Value: com.myapp [INFO] Parameter: packageInPathFormat, Value: com/myapp [INFO] Parameter: package, Value: com.myapp [INFO] Parameter: version, Value: 1.0-SNAPSHOT [INFO] Parameter: groupId, Value: com.myapp [INFO] Parameter: artifactId, Value: myapp [INFO] Project created from Archetype in dir: /var/tmp/maven/myapp [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 03:48 min [INFO] Finished at: 2018-09-28T16:37:18+09:00 [INFO] ------------------------------------------------------------------------ [ansible@centos7-02 maven]$
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検証する。
cd myapp; pwd mvn validate
[INFO] Scanning for projects... [INFO] [INFO] --------------------------< com.myapp:myapp >--------------------------- [INFO] Building myapp 1.0-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.372 s [INFO] Finished at: 2018-09-28T16:38:15+09:00 [INFO] ------------------------------------------------------------------------
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コンパイルする。
mvn compile
[INFO] Scanning for projects... [INFO] [INFO] --------------------------< com.myapp:myapp >--------------------------- [INFO] Building myapp 1.0-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-resources-plugin/3.0.2/maven-resources-plugin-3.0.2.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-resources-plugin/3.0.2/maven-resources-plugin-3.0.2.pom (7.1 kB at 4.4 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-plugins/30/maven-plugins-30.pom (中略) Downloaded from central: https://repo.maven.apache.org/maven2/com/thoughtworks/qdox/qdox/2.0-M7/qdox-2.0-M7.jar (315 kB at 321 kB/s) [INFO] Changes detected - recompiling the module! [INFO] Compiling 1 source file to /var/tmp/maven/myapp/target/classes [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 28.664 s [INFO] Finished at: 2018-09-28T16:39:58+09:00 [INFO] ------------------------------------------------------------------------
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テストする。
mvn test
[INFO] Scanning for projects... [INFO] [INFO] --------------------------< com.myapp:myapp >--------------------------- [INFO] Building myapp 1.0-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-surefire-plugin/2.20.1/maven-surefire-plugin-2.20.1.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-surefire-plugin/2.20.1/maven-surefire-plugin-2.20.1.pom (5.2 kB at 2.9 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire/2.20.1/surefire-2.20.1.pom (中略) Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire-junit4/2.20.1/surefire-junit4-2.20.1.jar (82 kB at 280 kB/s) [INFO] [INFO] ------------------------------------------------------- [INFO] T E S T S [INFO] ------------------------------------------------------- [INFO] Running com.myapp.AppTest [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.259 s - in com.myapp.AppTest [INFO] [INFO] Results: [INFO] [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0 [INFO] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 19.793 s [INFO] Finished at: 2018-09-28T16:41:10+09:00 [INFO] ------------------------------------------------------------------------
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パッケージを生成する。
mvn package
[INFO] Scanning for projects... [INFO] [INFO] --------------------------< com.myapp:myapp >--------------------------- [INFO] Building myapp 1.0-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-jar-plugin/3.0.2/maven-jar-plugin-3.0.2.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-jar-plugin/3.0.2/maven-jar-plugin-3.0.2.pom (6.2 kB at 3.7 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-jar-plugin/3.0.2/maven-jar-plugin-3.0.2.jar (中略) Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/commons/commons-compress/1.11/commons-compress-1.11.jar (426 kB at 277 kB/s) [INFO] Building jar: /var/tmp/maven/myapp/target/myapp-1.0-SNAPSHOT.jar [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 14.051 s [INFO] Finished at: 2018-09-28T16:42:26+09:00 [INFO] ------------------------------------------------------------------------
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実行する: エラー!
ls -l target/myapp-1.0-SNAPSHOT.jar LANG=C java -jar target/myapp-1.0-SNAPSHOT.jar
no main manifest attribute, in target/myapp-1.0-SNAPSHOT.jar
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pom.xml を修正する。
cp -aiv pom.xml pom.xml.`date +%Y%m%d` vi pom.xml diff -u pom.xml.`date +%Y%m%d` pom.xml
--- pom.xml.20180928 2018-09-28 16:37:18.062624925 +0900 +++ pom.xml 2018-09-28 16:46:09.944109262 +0900 @@ -50,6 +50,15 @@ <plugin> <artifactId>maven-jar-plugin</artifactId> <version>3.0.2</version> + <configuration> + <archive> + <manifest> + <addClasspath>true</addClasspath> + <classpathPrefix>lib/</classpathPrefix> + <mainClass>com.myapp.App</mainClass> + </manifest> + </archive> + </configuration> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId>
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パッケージを再生成する。
mvn clean mvn package
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実行する: OK!
LANG=C java -jar target/myapp-1.0-SNAPSHOT.jar
Hello World!
どっとはらい。