Two The practice of Java Engineering--maven

Maven Project version number

• Default version number: 1.0-snapshot The best practice is to contract the version to an unstable version if the release must be deleted;
• Recommended version rule: Major version number. The minor version number. Delta Version number-< milestone version > such as: 1.0.0-release 10.2.5-final, etc. best practice is to develop a version number rule that everyone recognizes as a combination of their own.

Common commands

The built-in MAVEN plugin provides a common command to find the corresponding package in the following location:. m2\repository\org\apache\maven\plugins

• Compile
• Clean delete/target, delete compiled binaries, etc.
• Test test Case Junit/testng
• Package Packaging
• Install the project to the local warehouse
• Deploy release jar to remote server
• MVN Help:system Viewing environment variables

Plug-in Repository

• https://maven.apache.org/plugins/
• Http://www.mojohaus.org/plugins.html

Common plugins

• findbugs Static code check
• versions Unified upgrade version number Unified upgrade version http://www.mojohaus.org/versions-maven-plugin/you can see the usage examples, Common settings version of the command for MVN versions:set–dnewversion=1.1.0-final
• mvn versions:set-dnewversion=1.1
• Source Packaging sources Use the
• assembly Package zip, war
• tomcat7
When the jar is available externally

<plugins> <!--static code bug Scan--<plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>findbugs-maven-plugin</artifactId> <version>3.0.0</version> <configu Ration> <threshold>High</threshold> <effort>Default</effort> & Lt;findbugsxmloutput>true</findbugsxmloutput> <findbugsxmloutputdirectory>target/site</findbu Gsxmloutputdirectory> </configuration> </plugin> <!--version number management--<plugin> & Lt;groupid>org.codehaus.mojo</groupid> <artifactId>versions-maven-plugin</artifactId> & Lt;version>2.3</version> </plugin> <!--packaging source codes--<plugin> <artifactid>mave n-source-plugin</artifactid> <version>2.3</version> <executions> <exec               Ution> <id>attach-sources</id> <phase>install</phase> <goals> <goal>jar-no-fork</goal> </goals> </execution> </ Executions> </plugin> <!--This is a bit dizzy, generate executable jar package what--<plugin> <artifactid>maven-asse mbly-plugin</artifactid> <version>3.0.0</version> <configuration> <arc                Hieve> <manifest> <mainClass>com.xlx.Test</mainClass> </manifest> </archieve> <descriptorRefs> <descriptorref>jar -with-dependencies</descriptorref> </descriptorRefs> </configuration> &LT;/PLUGIN&G    T <!--Tomcat plug-in <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifacti D>tomcat7-maven-plugin</artifactid> <version>2.2</version> <configuration> <port>8 080</port> <path>/</path> </configuration> </plugin></plugins>

Custom Plugins

Learning Address https://maven.apache.org/guides/plugin/guide-java-plugin-development.html

1. Create a project
2. Modifying the POM<packaging>maven-plugin</packaging>
3. Add dependency

<dependencies>    <dependency>        <groupId>org.apache.maven</groupId>        <artifactId>maven-plugin-api</artifactId>        <version>LATEST</version>    </dependency>    <dependency>        <groupId>org.apache.maven.plugin-tools</groupId>        <artifactId>maven-plugin-annotations</artifactId>        <version>LATEST</version>        <scope>provided</scope>    </dependency></dependencies>

1. Write code implementationAbstractMojo

@Mojo(name="xlxTest",defaultPhase = LifecyclePhase.PACKAGE)public class Test extends AbstractMojo {    /**     * 接收的参数     */    @Parameter    private String message;    /**     * 接收多个值的参数     */    @Parameter    private List<String> options;    /**     * 命令行中接收,注意必须有property mvn:package -Dargs=this is from cmd     */    @Parameter(property = "args")    private String args;    public void execute() throws MojoExecutionException, MojoFailureException {        System.out.println("my first maven plugin message is : " + message);        System.out.println("my first maven plugin options is : " + options);        System.out.println("my first maven plugin args from evm is : " + args);    }}

1. MVN Install
2. Use, maven can receive parameters, or use environment variables, such as ${settings.localrepository},${project.baseuri}, etc.

<!--项目pom修改--><build>    <plugins>        <plugin>            <groupId>com.xlx</groupId>            <artifactId>engineering</artifactId>            <version>1.0-SNAPSHOT</version>            <executions>                <execution>                    <phase>package</phase>                    <goals>                        <goal>xlxTest</goal>                    </goals>                </execution>            </executions>            <configuration>                <message>message</message>                <options>                    <option>one</option>                    <option>two</option>                </options>            </configuration>        </plugin>    </plugins></build>

Profile

• Different operating environment dev/prod/test, etc.
• MVN Clean Package–p Dev
• Settings.xml can specify different server warehousing configurations<profile.active>私服或者官方</profile.active>

Configuration file path for multi-environment configuration

  <profiles> <profile> <id>dev</id> <properties> <profile.active>dev</profile.active> </properties> <activation> <        ;activebydefault>true</activebydefault> </activation> </profile> <profile> <id>test</id> <properties> <profile.active>test</profile.active> &L            t;/properties> </profile></profiles><build> <resources> <resource> <directory>${baseDir}/src/main/resources</directory> <excludes> <exclude& gt;conf/**</exclude> </excludes> </resource> <resource> <d Irectory>src/main/resources/conf/${profile.active}</directory> </resource> </resources>< /build>  

Private Servers

• Download: https://www.sonatype.com/download-oss-sonatype?hsCtaTracking=920dd7b5-7ef3-47fe-9600-10fecad8aa32% 7cf59d5f10-099f-4c66-a622-0254373f4a92
• Installation, decompression, if you need to modify the port number and other information, you can modify the file \nexus-3.13.0-01\etc\nexus-default.properties
• Start command go to \nexus-3.13.0-01\bin, Nexus/run can view boot log
• Use: http://books.sonatype.com/nexus-book/reference3/index.html

Adding a publishing node to the POM

<distributionManagement>    <repository>        <id>nexus-release</id>        <name>nexus-release</name>        <url>http://localhost:8099/repository/maven-releases/</url>    </repository>    <snapshotRepository>        <id>nexus-snapshot</id>        <name>nexus-snapshot</name>        <url>http://localhost:8099/repository/maven-snapshots/</url>    </snapshotRepository></distributionManagement>

Modify settings.xml Add server account password information

<server>    <id>nexus-release</id>    <username>admin</username>    <password>admin123</password></server><server>    <id>nexus-snapshot</id>    <username>admin</username>    <password>admin123</password></server>

Build Scaffolding

• MVN Archetype:create-from-project build Scaffolding from Project
• Cd/target/generated-soource/archetype go to this directory
• MVN Install release to warehouse
• List of scaffolding that can be added to the IDE
• MVN archetype:generate–darchetypecatagory=local Command-line method to create a project local parameter specify walk-in warehouse

Two The practice of Java Engineering--maven