Maven has three standard lifecycles:
clean : handling of project cleanup
default(或 build) Processing of project deployment
site Processing of project site document creation
Each lifecycle contains a series of phases (phase). These phase are equivalent to the unified interface provided by Maven, and then the implementation of these phase is done by Maven plug-ins.
When we enter the mvn command, such as mvn clean,clean, it corresponds to the clean phase in the Clean life cycle. But the specific operation of clean is made up of maven-clean-plugin To make it happen.
So the concrete implementation of each phase of the Maven life cycle is implemented by the Maven plug-in.
Maven is actually a framework that relies on plug-ins for execution, and each task is actually done by plug-ins. The Maven plug-in is usually used to:
Create a jar file
Create a war file
Compile code file
Code unit test
Create a project document
Create a project report
Plug-ins usually provide a collection of targets and can be executed using the following syntax:
<code>mvn [plugin-name]:[goal-name]code>
For example, a Java project can be compiled using maven-compiler-plugin ‘s compile-goal, using the following command:
<code>mvn compiler:compilecode>
11.7.1. Plug-in type ¶
Maven provides the following two types of plug-ins:
Types
Description
Build plugins
It is executed at build time and configured in the element of pom.xml.
Reporting plugins
It is executed during the site generation process and configured in the element of pom.xml.
Here is a list of some common plug-ins:
Plug-in
Description
Clean
Clean up the target file after building. Delete the destination directory.
Compiler
Compile the Java source file.
Surefile
Run the JUnit unit test. Create a test report.
Jar
Build the JAR file from the current project.
War
Build the WAR file from the current project.
Javadoc
Generate Javadoc for the project.
Antrun
Run a collection of ant tasks from any stage of the build process.
11.7.2. Example ¶
We’ve used it a lot in our example. maven-antrun-plugin To output the data to the console. Please check Maven - 构建配置文件 Chapter. Let’s understand this section in a better way and create a pom.xml file in the C:MVNproject directory.
<projectxmlns="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/xsd/maven-4.0.0.xsd">4.0.0 com.companyname.projectgroup project 1.0 org.apache.maven.plugins maven-antrun-plugin 1.1 id.clean clean run clean
phaseecho>tasks>configuration>execution>executions>plugin>plugins>build>project>
Next, open the command terminal and jump to the directory where pom.xml is located, and execute the following mvn command.
mvn clean
Maven will begin to process and display the clean phase of the clean life cycle.
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------
[INFO] Building Unnamed - com.companyname.projectgroup:project:jar:1.0
[INFO] task-segment: [post-clean]
[INFO] ------------------------------------------------------------------
[INFO] [clean:clean {execution: default-clean}]
[INFO] [antrun:run {execution: id.clean}]
[INFO] Executing tasks
[echo] clean phase
[INFO] Executed tasks
[INFO] ------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Sat Jul 07 13:38:59 IST 2012
[INFO] Final Memory: 4M/44M
[INFO] ------------------------------------------------------------------
The above example shows the following key concepts:
-
Plug-ins are defined using the plugins element in pom.xml.
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Each plug-in can have multiple goals.
-
You can define the phase, and the plug-in will use its phase element to start processing. We’ve used it. clean Stage.
-
You can configure the tasks to be performed by binding to the target of the plug-in. We’re already bound. echo Task to maven-antrun-plugin run target.
-
That’s it. Maven will take care of the rest. It will download plug-ins that are not available in the local repository and start processing.
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1. Geographical Information Systems in the World Wide Web Era
4
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2. Basic technology of WebGIS
4
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3. Geographic Web Services
5
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4. aggregation of geographical information
4
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5. mobile GIS
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6. Geographic information portal
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7. New generation national spatial data infrastructure and GIS
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8. Application of WebGIS in E-Commerce
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9. Application of WebGIS in E-government
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10. Hotspots and frontiers of WebGIS
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1. Angularjs2
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1. SVG tutorial
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1. Memcached
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1. C# tutorial
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1. Sqlite
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2. Go
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2. Docker
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2. Vue3
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2. Servlet
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3. React
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3. SOAP tutorial
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3. Android
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3. Mongodb
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3. Kotlin
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4. Lua
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4. MySQL tutorial
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4. Appml
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5. Perl
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5. Postgresql
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web
15
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5. Web Services tutorial
6
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6. Ruby
41
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6. Design-pattern
35
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7. Django
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7. Rust
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6. WSDL tutorial
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8. Foundation
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9. Ios
43
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8. Css3
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9. Swift
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11. HTML tutorial-(HTML5 Standard)
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12. Http
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13. Regex
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14. Regexp
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Principles, Technologies, and Methods of Geographic Information Systems
102
In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.
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1. Introduction to Geographic Information Systems
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2. From the Real World to the Bit World
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3. Spatial Data Model
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4. Spatial Reference Systems and Map Projections
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5. Data in GIS
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6. Spatial data acquisition
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7. Spatial Data Management
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8. Spatial analysis
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9. Digital Terrain Model (DTM) and Terrain Analysis
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10. Spatial modeling and spatial decision support
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11. Spatial data representation and map making
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12. 3S Integration Technology
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13. Network Geographic Information System
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14. Examples of Geographic Information System Application
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15. Organization and Management of Geographic Information System Application Projects
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16. Geographic Information system Software Engineering Technology
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17. Geographic Information System Standards
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18. Geographic Information System and Society
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19. Earth Information Science and Digital Earth
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