当前 Java 是 OpenJDK 17

			
Neo-iMac:~ neo$ java -version
openjdk version "17.0.1" 2021-10-19
OpenJDK Runtime Environment Homebrew (build 17.0.1+0)
OpenJDK 64-Bit Server VM Homebrew (build 17.0.1+0, mixed mode, sharing)			
			
			

代码中增加了

			
	<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <encoding>UTF-8</encoding>
        <java.version>1.8</java.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>			
			
			

仍如不能通过编译，提示：

			
An exception has occurred in the compiler (17.0.1). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program, the following diagnostic, and the parameters passed to the Java compiler in your report. Thank you.
com.sun.tools.javac.code.Symbol$CompletionFailure: class file for jakarta.validation.constraints.Pattern$Flag not found			
			
			

这是因为有些第三方包依赖 OpenJDK 8 的一些包。安装 openjdk8 使用 1.8 编译问题得到解决。

			
export JAVA_HOME=/Library/Java/JavaVirtualMachines/openjdk-8.jdk/Contents/Home
mvn package			
			
			

多线程下载 -Dmaven.artifact.threads=10 默认是 5

			
mvn -Dmaven.artifact.threads=10 test

您可以使用MAVEN_OPTS环境变量。例如：

export MAVEN_OPTS = -Dmaven.artifact.threads = 10

MAVEN_OPTS = -Dmaven.repo.local=.m2/repository
			
			

			
mvn clean install -Dmaven.test.skip=true -s ~/.m2/settings.xml			
			
			

使用4个线程构建

			
mvn -T 4 install
			
			

每个CPU核心1个线程

			
mvn -T 1C install			
			
			

查看可用的pom定义

mvn help:effective-pom			
		

创建 Maven 项目

			
mvn archetype:create   -DarchetypeGroupId=org.apache.maven.archetypes   -DgroupId=com.company -DartifactId=my-app			
			
			

			
mvn archetype:create 
    -DgroupId=packageName    
    -DartifactId=webappName 
    -DarchetypeArtifactId=maven-archetype-webapp 			
			
			

清楚

$ mvn clean		
			

编译项目的源代码

$ mvn compile
			

				
mvn clean package -T 1C -Dmaven.test.skip=true  -Dmaven.compile.fork=true				
				
				

			
mvn test-compile  			
			
			

编译测试的源代码

mvn test-compile			
			

运行测试

$ mvn test
			
			

打包但不测试

			
mvn -D maven.test.skip=true package
			
			

忽略测试失败

			
mvn test -Dmaven.test.failure.ignore			
			
			

将编译后的代码打包

$ mvn package
			

$ ls target/*.war
target/www.netkiller.cn-0.0.1-SNAPSHOT.war
			

防止出现脏数据，可以先 clean 然后再打包，同时为了加快打包速度，逃过测试

			
mvn clean package -Dmaven.test.skip=true			
			
			

将项目打包后安装到本地仓库，可以作为其它项目的本地依赖。

$ mvn install		
			

跳过测试

mvn install -Dmaven.test.skip=true			
			

				
mvn install:install-file -Dfile=<path-to-file> -DgroupId=<group-id> -DartifactId=<artifact-id> -Dversion=<version> -Dpackaging=<packaging>

<path-to-file>: 要安装的JAR的本地路径
<group-id>：		要安装的JAR的Group Id
<artifact-id>: 	要安装的JAR的 Artificial Id
<version>: 		JAR 版本
<packaging>: 	打包类型，例如JAR
				
				

				
mvn install:install-file -Dfile=path/to/your.jar -DgroupId=com.example -DartifactId=project -Dversion=1.2.0 -Dpackaging=jar
				
				

mvn compile war:war			
			

mvn compile war:exploded			
			

mvn compile war:inplace
			

$ mvn exec:java -Dexec.mainClass="cn.netkiller.Test"			
			

			
mvn -Djar.finalName=myCustomName package			
			
			

			
mvn jar:jar -Djar.finalName=custom-jar-name			
			
			

			
mvn install assembly:assembly			
			
			

--encrypt-master-password

			
neo@MacBook-Pro ~ % mvn --encrypt-master-password test
{LhCRW9y8CG4HfT7ExHI3msP56Cv+fgjdiNhTk883hZs=}			
			
			

显示插件的详细信息

			
MacBook-Pro:deployment neo$ mvn help:describe -DgroupId=org.apache.maven.plugins                   -DartifactId=maven-war-plugin                   -Ddetail=true
[INFO] Scanning for projects...
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-help-plugin:2.2:describe (default-cli) @ standalone-pom ---
[INFO] org.apache.maven.plugins:maven-war-plugin:3.1.0

Name: Apache Maven WAR Plugin
Description: Builds a Web Application Archive (WAR) file from the project
  output and its dependencies.
Group Id: org.apache.maven.plugins
Artifact Id: maven-war-plugin
Version: 3.1.0
Goal Prefix: war

This plugin has 4 goals:

war:exploded
  Description: Create an exploded webapp in a specified directory.
  Implementation: org.apache.maven.plugins.war.WarExplodedMojo
  Language: java
  Bound to phase: package

  Available parameters:

    archive
      The archive configuration to use. See Maven Archiver Reference.

    archiveClasses (Default: false)
      Whether a JAR file will be created for the classes in the webapp. Using
      this optional configuration parameter will make the compiled classes to
      be archived into a JAR file and the classes directory will then be
      excluded from the webapp.

    cacheFile (Default: ${project.build.directory}/war/work/webapp-cache.xml)
      Required: true
      The file containing the webapp structure cache.

    containerConfigXML
      The path to a configuration file for the servlet container. Note that the
      file name may be different for different servlet containers. Apache
      Tomcat uses a configuration file named context.xml. The file will be
      copied to the META-INF directory.

    delimiters
      Set of delimiters for expressions to filter within the resources. These
      delimiters are specified in the form 'beginToken*endToken'. If no '*' is
      given, the delimiter is assumed to be the same for start and end.
      
      So, the default filtering delimiters might be specified as:
      
      <delimiters>
        <delimiter>${*}</delimiter>
        <delimiter>@</delimiter>
      </delimiters>
      
      Since the '@' delimiter is the same on both ends, we don't need to
      specify '@*@' (though we can).

    dependentWarExcludes
      The comma separated list of tokens to exclude when doing a WAR overlay.
      Default is Overlay.DEFAULT_EXCLUDES

    dependentWarIncludes
      The comma separated list of tokens to include when doing a WAR overlay.
      Default is Overlay.DEFAULT_INCLUDES

    escapedBackslashesInFilePath (Default: false)
      To escape interpolated values with Windows path c:\foo\bar will be
      replaced with c:\\foo\\bar.

    escapeString
      Expression preceded with this String won't be interpolated. \${foo} will
      be replaced with ${foo}.

    filteringDeploymentDescriptors (Default: false)
      To filter deployment descriptors. Disabled by default.

    filters
      Filters (property files) to include during the interpolation of the
      pom.xml.

    includeEmptyDirectories (Default: false)
      (no description available)

    nonFilteredFileExtensions
      A list of file extensions that should not be filtered. Will be used when
      filtering webResources and overlays.

    outputFileNameMapping
      The file name mapping to use when copying libraries and TLDs. If no file
      mapping is set (default) the files are copied with their standard names.

    overlays
      The overlays to apply. Each <overlay> element may contain:
      - id (defaults to currentBuild)
      - groupId (if this and artifactId are null, then the current project is
        treated as its own overlay)
      - artifactId (see above)
      - classifier
      - type
      - includes (a list of string patterns)
      - excludes (a list of string patterns)
      - filtered (defaults to false)
      - skip (defaults to false)
      - targetPath (defaults to root of webapp structure)

    recompressZippedFiles (Default: true)
      Indicates if zip archives (jar,zip etc) being added to the war should be
      compressed again. Compressing again can result in smaller archive size,
      but gives noticeably longer execution time.

    resourceEncoding (Default: ${project.build.sourceEncoding})
      The encoding to use when copying filtered web resources.

    supportMultiLineFiltering (Default: false)
      Stop searching endToken at the end of line

    useCache (Default: false)
      Whether the cache should be used to save the status of the webapp across
      multiple runs. Experimental feature so disabled by default.

    useDefaultDelimiters (Default: true)
      Use default delimiters in addition to custom delimiters, if any.

    useJvmChmod (Default: true)
      use jvmChmod rather that cli chmod and forking process

    warSourceDirectory (Default: ${basedir}/src/main/webapp)
      Required: true
      Single directory for extra files to include in the WAR. This is where you
      place your JSP files.

    warSourceExcludes
      The comma separated list of tokens to exclude when copying the content of
      the warSourceDirectory.

    warSourceIncludes (Default: **)
      The comma separated list of tokens to include when copying the content of
      the warSourceDirectory.

    webappDirectory (Default:
    ${project.build.directory}/${project.build.finalName})
      Required: true
      The directory where the webapp is built.

    webResources
      The list of webResources we want to transfer.

    webXml
      The path to the web.xml file to use.

    workDirectory (Default: ${project.build.directory}/war/work)
      Required: true
      Directory to unpack dependent WARs into if needed.

war:help
  Description: Display help information on maven-war-plugin.
    Call mvn war:help -Ddetail=true -Dgoal=<goal-name> to display parameter
    details.
  Implementation: org.apache.maven.plugins.war.HelpMojo
  Language: java

  Available parameters:

    detail (Default: false)
      User property: detail
      If true, display all settable properties for each goal.

    goal
      User property: goal
      The name of the goal for which to show help. If unspecified, all goals
      will be displayed.

    indentSize (Default: 2)
      User property: indentSize
      The number of spaces per indentation level, should be positive.

    lineLength (Default: 80)
      User property: lineLength
      The maximum length of a display line, should be positive.

war:inplace
  Description: Generate the webapp in the WAR source directory.
  Implementation: org.apache.maven.plugins.war.WarInPlaceMojo
  Language: java

  Available parameters:

    archive
      The archive configuration to use. See Maven Archiver Reference.

    archiveClasses (Default: false)
      Whether a JAR file will be created for the classes in the webapp. Using
      this optional configuration parameter will make the compiled classes to
      be archived into a JAR file and the classes directory will then be
      excluded from the webapp.

    cacheFile (Default: ${project.build.directory}/war/work/webapp-cache.xml)
      Required: true
      The file containing the webapp structure cache.

    containerConfigXML
      The path to a configuration file for the servlet container. Note that the
      file name may be different for different servlet containers. Apache
      Tomcat uses a configuration file named context.xml. The file will be
      copied to the META-INF directory.

    delimiters
      Set of delimiters for expressions to filter within the resources. These
      delimiters are specified in the form 'beginToken*endToken'. If no '*' is
      given, the delimiter is assumed to be the same for start and end.
      
      So, the default filtering delimiters might be specified as:
      
      <delimiters>
        <delimiter>${*}</delimiter>
        <delimiter>@</delimiter>
      </delimiters>
      
      Since the '@' delimiter is the same on both ends, we don't need to
      specify '@*@' (though we can).

    dependentWarExcludes
      The comma separated list of tokens to exclude when doing a WAR overlay.
      Default is Overlay.DEFAULT_EXCLUDES

    dependentWarIncludes
      The comma separated list of tokens to include when doing a WAR overlay.
      Default is Overlay.DEFAULT_INCLUDES

    escapedBackslashesInFilePath (Default: false)
      To escape interpolated values with Windows path c:\foo\bar will be
      replaced with c:\\foo\\bar.

    escapeString
      Expression preceded with this String won't be interpolated. \${foo} will
      be replaced with ${foo}.

    filteringDeploymentDescriptors (Default: false)
      To filter deployment descriptors. Disabled by default.

    filters
      Filters (property files) to include during the interpolation of the
      pom.xml.

    includeEmptyDirectories (Default: false)
      (no description available)

    nonFilteredFileExtensions
      A list of file extensions that should not be filtered. Will be used when
      filtering webResources and overlays.

    outputFileNameMapping
      The file name mapping to use when copying libraries and TLDs. If no file
      mapping is set (default) the files are copied with their standard names.

    overlays
      The overlays to apply. Each <overlay> element may contain:
      - id (defaults to currentBuild)
      - groupId (if this and artifactId are null, then the current project is
        treated as its own overlay)
      - artifactId (see above)
      - classifier
      - type
      - includes (a list of string patterns)
      - excludes (a list of string patterns)
      - filtered (defaults to false)
      - skip (defaults to false)
      - targetPath (defaults to root of webapp structure)

    recompressZippedFiles (Default: true)
      Indicates if zip archives (jar,zip etc) being added to the war should be
      compressed again. Compressing again can result in smaller archive size,
      but gives noticeably longer execution time.

    resourceEncoding (Default: ${project.build.sourceEncoding})
      The encoding to use when copying filtered web resources.

    supportMultiLineFiltering (Default: false)
      Stop searching endToken at the end of line

    useCache (Default: false)
      Whether the cache should be used to save the status of the webapp across
      multiple runs. Experimental feature so disabled by default.

    useDefaultDelimiters (Default: true)
      Use default delimiters in addition to custom delimiters, if any.

    useJvmChmod (Default: true)
      use jvmChmod rather that cli chmod and forking process

    warSourceDirectory (Default: ${basedir}/src/main/webapp)
      Required: true
      Single directory for extra files to include in the WAR. This is where you
      place your JSP files.

    warSourceExcludes
      The comma separated list of tokens to exclude when copying the content of
      the warSourceDirectory.

    warSourceIncludes (Default: **)
      The comma separated list of tokens to include when copying the content of
      the warSourceDirectory.

    webappDirectory (Default:
    ${project.build.directory}/${project.build.finalName})
      Required: true
      The directory where the webapp is built.

    webResources
      The list of webResources we want to transfer.

    webXml
      The path to the web.xml file to use.

    workDirectory (Default: ${project.build.directory}/war/work)
      Required: true
      Directory to unpack dependent WARs into if needed.

war:war
  Description: Build a WAR file.
  Implementation: org.apache.maven.plugins.war.WarMojo
  Language: java
  Bound to phase: package

  Available parameters:

    archive
      The archive configuration to use. See Maven Archiver Reference.

    archiveClasses (Default: false)
      Whether a JAR file will be created for the classes in the webapp. Using
      this optional configuration parameter will make the compiled classes to
      be archived into a JAR file and the classes directory will then be
      excluded from the webapp.

    attachClasses (Default: false)
      Whether classes (that is the content of the WEB-INF/classes directory)
      should be attached to the project as an additional artifact.
      By default the classifier for the additional artifact is 'classes'. You
      can change it with the someclassifier parameter.
      
      If this parameter true, another project can depend on the classes by
      writing something like:
      
      
        myGroup
        myArtifact
        myVersion
        classes

    cacheFile (Default: ${project.build.directory}/war/work/webapp-cache.xml)
      Required: true
      The file containing the webapp structure cache.

    classesClassifier (Default: classes)
      The classifier to use for the attached classes artifact.

    classifier
      Classifier to add to the generated WAR. If given, the artifact will be an
      attachment instead. The classifier will not be applied to the JAR file of
      the project - only to the WAR file.

    containerConfigXML
      The path to a configuration file for the servlet container. Note that the
      file name may be different for different servlet containers. Apache
      Tomcat uses a configuration file named context.xml. The file will be
      copied to the META-INF directory.

    delimiters
      Set of delimiters for expressions to filter within the resources. These
      delimiters are specified in the form 'beginToken*endToken'. If no '*' is
      given, the delimiter is assumed to be the same for start and end.
      
      So, the default filtering delimiters might be specified as:
      
      Since the '@' delimiter is the same on both ends, we don't need to
      specify '@*@' (though we can).

    dependentWarExcludes
      The comma separated list of tokens to exclude when doing a WAR overlay.
      Default is Overlay.DEFAULT_EXCLUDES

    dependentWarIncludes
      The comma separated list of tokens to include when doing a WAR overlay.
      Default is Overlay.DEFAULT_INCLUDES

    escapedBackslashesInFilePath (Default: false)
      To escape interpolated values with Windows path c:\foo\bar will be
      replaced with c:\\foo\\bar.

    escapeString
      Expression preceded with this String won't be interpolated. \${foo} will
      be replaced with ${foo}.

    failOnMissingWebXml
      Whether or not to fail the build if the web.xml file is missing. Set to
      false if you want your WAR built without a web.xml file. This may be
      useful if you are building an overlay that has no web.xml file.
      Starting with 3.1.0, this property defaults to false if the project
      depends on the Servlet 3.0 API or newer.

    filteringDeploymentDescriptors (Default: false)
      To filter deployment descriptors. Disabled by default.

    filters
      Filters (property files) to include during the interpolation of the
      pom.xml.

    includeEmptyDirectories (Default: false)
      (no description available)

    nonFilteredFileExtensions
      A list of file extensions that should not be filtered. Will be used when
      filtering webResources and overlays.

    outputDirectory (Default: ${project.build.directory})
      Required: true
      The directory for the generated WAR.

    outputFileNameMapping
      The file name mapping to use when copying libraries and TLDs. If no file
      mapping is set (default) the files are copied with their standard names.

    overlays
      The overlays to apply. Each overlay element may contain:
      - id (defaults to currentBuild)
      - groupId (if this and artifactId are null, then the current project is
        treated as its own overlay)
      - artifactId (see above)
      - classifier
      - type
      - includes (a list of string patterns)
      - excludes (a list of string patterns)
      - filtered (defaults to false)
      - skip (defaults to false)
      - targetPath (defaults to root of webapp structure)

    packagingExcludes
      The comma separated list of tokens to exclude from the WAR before
      packaging. This option may be used to implement the skinny WAR use case.
      Note that you can use the Java Regular Expressions engine to include and
      exclude specific pattern using the expression %regex[]. Hint: read the
      about (?!Pattern).

    packagingIncludes
      The comma separated list of tokens to include in the WAR before
      packaging. By default everything is included. This option may be used to
      implement the skinny WAR use case. Note that you can use the Java Regular
      Expressions engine to include and exclude specific pattern using the
      expression %regex[].

    primaryArtifact (Default: true)
      Whether this is the main artifact being built. Set to false if you don't
      want to install or deploy it to the local repository instead of the
      default one in an execution.

    recompressZippedFiles (Default: true)
      Indicates if zip archives (jar,zip etc) being added to the war should be
      compressed again. Compressing again can result in smaller archive size,
      but gives noticeably longer execution time.

    resourceEncoding (Default: ${project.build.sourceEncoding})
      The encoding to use when copying filtered web resources.

    skip (Default: false)
      User property: maven.war.skip
      You can skip the execution of the plugin if you need to. Its use is NOT
      RECOMMENDED, but quite convenient on occasion.

    supportMultiLineFiltering (Default: false)
      Stop searching endToken at the end of line

    useCache (Default: false)
      Whether the cache should be used to save the status of the webapp across
      multiple runs. Experimental feature so disabled by default.

    useDefaultDelimiters (Default: true)
      Use default delimiters in addition to custom delimiters, if any.

    useJvmChmod (Default: true)
      use jvmChmod rather that cli chmod and forking process

    warSourceDirectory (Default: ${basedir}/src/main/webapp)
      Required: true
      Single directory for extra files to include in the WAR. This is where you
      place your JSP files.

    warSourceExcludes
      The comma separated list of tokens to exclude when copying the content of
      the warSourceDirectory.

    warSourceIncludes (Default: **)
      The comma separated list of tokens to include when copying the content of
      the warSourceDirectory.

    webappDirectory (Default:
    ${project.build.directory}/${project.build.finalName})
      Required: true
      The directory where the webapp is built.

    webResources
      The list of webResources we want to transfer.

    webXml
      The path to the web.xml file to use.

    workDirectory (Default: ${project.build.directory}/war/work)
      Required: true
      Directory to unpack dependent WARs into if needed.


[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.960 s
[INFO] Finished at: 2017-08-03T14:33:18+08:00
[INFO] Final Memory: 10M/155M
[INFO] ------------------------------------------------------------------------			
			
			

			
MacBook-Pro:api.netkiller.cn neo$ mvn help:describe \
	-DgroupId=org.springframework.boot \
	-DartifactId=spring-boot-maven-plugin \
	-Ddetail=true