Maven - create project

# Maven download

https://maven.apache.org/download.cgi

# 環境變數設定


# 確認有安裝好 Maven

mvn -v

mvn -version

# Create Project

Cmd

mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DarchetypeVersion=1.4 -DinteractiveMode=false

powershell

珍惜生命，學習 Java 請少用 PowerShell 當成你主要的 Shell 環境

mvn archetype:generate '-DgroupId=com.mycompany.app' -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart '-DarchetypeVersion=1.4' -DinteractiveMode=false

Git Bash

mvn archetype:generate \
  -DgroupId=com.mycompany.app -DartifactId=my-app \
  -DarchetypeArtifactId=maven-archetype-quickstart \
  -DarchetypeVersion=1.4 -DinteractiveMode=false

\ 換行只有 bash

以上皆無法

mvn archetype:generate

並選取以下功能

# Add exec-maven-plugin

<build>
    <pluginManagement>
      <plugins>
        <!-- 其他 plugins ... -->

        <!--===== 加入這段 =====-->
        <plugin>
          <groupId>org.codehaus.mojo</groupId>
          <artifactId>exec-maven-plugin</artifactId>
          <version>1.2.1</version>
          <executions>
            <execution>
              <goals>
                <goal>java</goal>
              </goals>
            </execution>
          </executions>
          <configuration>
            <mainClass>com.mycompany.app.App</mainClass>
          </configuration>
        </plugin>
        <!--===== 加入這段 =====-->

        <!-- 其他 plugins ... -->
      </plugins>
    </pluginManagement>
  </build>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>jar.app</groupId>
  <artifactId>my-app</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>
  <name>my-app</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.2.1</version>
                <executions>
                    <execution><!--設定Goal的執行方式-->
                      <goals>
                        <goal>java</goal> <!--要設定的goal-->
                      </goals>
                    </execution>
                </executions>
                <configuration>
                    <mainClass>jar.App</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

# 清除 target

mvn clean

# 產生執行檔

Compile: 通常只下這行就可以執行了

mvn compile

Building: 會完整的建構整個專案，並把專案打包成.jar 檔，供別人下載執行。但會產出較多檔案，且耗費較多時間

mvn package

# 執行

Execute

mvn exec:java