Common maven2 commands

Reproduced in: http://bakcom.iteye.com/blog/280604

 

 

The running command of maven2 is MVN,

Common commands:

MVN archetype: Create a Maven Project

MVN compile: Compile source code

MVN test-compile: Compile the test code

MVN test: run the unit test in the application.

MVN site: the website that generates project-related information

MVN clean: clears the generated results in the target directory.

MVN package: generate a jar file based on the project

MVN install: Install jar in local repository

MVN Eclipse: generate an Eclipse project file

Generate a project

Create a Java project: MVN archetype: Create-dgroupid = com. Demo-dartifactid = app

Create a WEB Project: MVN archetype: Create-dgroupid = com. Demo-dartifactid = web-app-darchetypeartifactid = Maven-Archetype-webapp

Generate an Eclipse project

Normal Eclipse project execution: MVN Eclipse: Eclipse

Eclipse WTP project execution: MVN Eclipse: eclipse-dwtpversion = 1.0

(Wtp1.0 and later versions can be used)

 

 

Introduction to Basic Nodes of POM. xml files

<Project>: Root Node of the file.
<Modelversion>: The object model version used by POM. xml.
<Groupid>: The unique ID of the organization or group that creates the project.
<Artifactid>: The unique ID of a project, which can be considered as the project name.
<Packaging>: The extension of the package, such as jar, war, and ear.
<Version>: Version number of the product.
<Name>: Project display name. It is often used for Maven-generated documents.
<URL>: The site of the Organization, which is commonly used for Maven-generated documents.
<Description>: Project description, which is commonly used in Maven-generated documents.

 

 

In pom 4, <dependency> also introduces <scope>, which mainly manages the deployment of dependencies.

Currently, <scope> can use five values:

Compile: the default value. It is applicable to all stages and will be released along with the project.

Provided: similar to compile, it is expected that JDK, container, or user will provide this dependency. For example, Servlet. jar.

Runtime: used only at runtime, such as the JDBC driver. Applicable to the running and testing stages.

Test: used only for testing. It is used to compile and run test code. Will not be released along with the project.

System: similar to provided, You need to explicitly provide jar containing dependencies. MAVEN will not find it in repository.

Define Your Own structure

Create an archetype project:

MVN archetype: Create \
-Dgroupid = cn. Prof \
-Dartifactid = prof-Archetype \
-Darchetypeartifactid = Maven-Archetype

Main template file: archetype-resources/POM. xml

Modify content

Modify related sources defined in META-INF/Maven/archetype. xml

Install this project: MVN install

Run the following command to create a project in the new directory:

MVN archetype: Create-dgroupid = com. mergere. mvnbook \

-Dartifactid = proficio-example \
-Darchetypegroupid = com. XXX. MVN \
-Darchetypeartifactid = prof-Archetype \
-Darchetypeversion = 1.0-Snapshot

Directory description

Maven2 directory
Directory	Level 2 Directory	Level 3 directory	Level 4 directory	Description
Pom. xml				Maven2 project settings file
Src/				Source code directory
	Main/			Project subject directory Root
		Java/		Source code directory
		Resources/		Required Resource Directory
		Filters/		Resource filter file directory
		Assemby/		Assembly Descriptors
		Config/		Configuration File root directory
		Webapp/		Web application directory
			WEB-INF/	WEB-INF directory
	Test/			Project test directory Root
		Java/		Test code directory
		Resources/		Resource Directory required for testing
		Filters/		Test resource filter file directory
	Site/			Site-related resource directories
Target/				Output directory Root
	Classes/			Project subject output directory
	Test_classes/			Project test output directory
	Site/			Project Site output directory

Problems encountered

1. This error is reported when the m2eclipse plug-in is installed.

Eclipse is running in a JRE, but a JDK is required

Some Maven plugins may not work when importing projects or updating source folders.

Solution: view the details in eclipse \ readme \ readme_eclipse.html. In the selecting a workspace section

Create a shortcut and set the target location to D: \ eclipse_jee \ eclipse.exe-vm d: \ Java \ jdk1.5.0 _ 10 \ bin \ javaw

Because the default VM is JDK, JRE, bin, and javaw, it is directly changed to JDK to eliminate errors.

2. Run the command MVN Eclipse: After eclipse-dwtpversion = 1.0, the Java of the imported project facet is still 1.4, and the value set on Eclipse is 5.0.

Solution: add the Plugins instructions in POM. xml.

XML Code

1. <Plugins>
2. <Plugin>
3. <Artifactid>Maven-compiler-plugin</Artifactid>
   
4. <Configuration>
5. <Source>1.5</Source>
   
6. <Target>1.5</Target>
   
7. </Configuration>
8. </Plugin>
9. </Plugins>

View plaincopy to clipboardprint?

1. <Plugins> <plugin> <artifactid>Maven-compiler-plugin</Artifactid> <configuration> <source>1.5</Source> <target>1.5</Target> </configuration> </plugin> </plugins>

XML Code

1. <Plugins> <plugin> <artifactid> Maven-compiler-plugin </artifactid> <configuration> <source> 1.5 </source> <target> 1.5 </Target> </Configuration> </plugin> </plugins>

<Plugins> <plugin> <artifactid> Maven-compiler-plugin </artifactid> <configuration> <source> 1.5 </source> <target> 1.5 </Target> </Configuration> </plugin> </plugins>

 

3. After using the command MVN Eclipse: Eclipse, import it to eclipse. Right-click the Eclipse project and choose plug-in Maven> enable dependency management. An error indicating repeated references will be reported.
Solution: Execute MVN Eclipse: Eclipse, refresh the Eclipse project, and cancel the reference dependency of the maven plug-in. The error will be eliminated.

 

4. Failure executing javac, but cocould not parse the error:
An exception occurs in the compiler (1.5.0 _ 10. If this error is not found in bug parade, archive it in Java Developer Connection (http://java.sun.com/webapps/bugreport. Please include your program and the following diagnostic information in the report. Thank you for your cooperation.
Java. NiO. bufferoverflowexception