Construction of the project maven slices: 4. Coordination and dependency, spring relies on injection demo

SOURCE download
Coordinate

  <groupId>com.demo.animal</groupId>  <artifactId>animal-core</artifactId>  < Version>0.0.1-snapshot</version>  <packaging>jar</packaging>

GroupId: Define the actual project that the current MAVEN project belongs to

Artifactid: Defines a MAVEN project (module) in the actual project, and recommends that the actual project project be prefixed with the artifactid, such as: Nexus-indexer

Current version of the Version:maven project

How to Package a Packaging:maven project

Depend on

Pom.xml

<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/xsd/maven-4.0.0.xsd" >< Modelversion>4.0.0</modelversion><groupid>com.demo.animal</groupid><artifactid> Animal-core</artifactid><version>0.0.1-snapshot</version><packaging>jar</packaging ><name>animal-core</name><url>http://maven.apache.org</url><properties>< Project.build.sourceencoding>utf-8</project.build.sourceencoding></properties><dependencies ><dependency><groupId>junit</groupId><artifactId>junit</artifactId>< Version>4.10</version><scope>test</scope></dependency><dependency><groupid >org.springframework</groupid><artifactid>spring-core</artifactid><version>3.0.7. Release</version></depenDency><dependency><groupid>org.springframework</groupid><artifactid>spring-beans </artifactId><version>3.0.7.RELEASE</version></dependency><dependency>< Groupid>org.springframework</groupid><artifactid>spring-context</artifactid><version >3.0.7.release</version></dependency><dependency><groupid>org.springframework</ groupid><artifactid>spring-test</artifactid><version>3.0.7.release</version></ Dependency><dependency><groupid>com.kenai.nbpwr</groupid><artifactid>javax-inject </artifactId><version>1.0-201002241208</version></dependency></dependencies>< /project>

Maven uses dependencies by setting coordinates in the dependency element, such as the following:

groupid,artifactid,version: The basic coordinates of dependence, the most important

Type: dependent type, corresponding to the packaging of the project coordinate definition, in most cases, this does not need to be configured, the default feeling jar

Scope: Scope of dependence

Optional: Whether tag dependency is optional

Exclusions: Used to exclude transitive dependencies

Range of dependencies

The dependency range is used to control the relationship with these three classpath (compile classpath, test classpath, execute classpath)

The type of dependency range:

Compile: Compile tie range, default , for compiling, test, execute three kinds of classpath are effective, such as: Spring-core

Test: test-dependent range, only valid for test classpath, such as: JUnit

Provided: The dependency range has been provided, which is effective for compiling and testing classpath, such as: Servlet-api

Runtime: Execution time range, valid for test and execution, such as: JDBC Driver

System: Systems-dependent, same as provided

Dependency range is related to Classpath

Transitive dependency

watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvd29izw5kawfua3vu/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/southeast ">

Execute command to view dependent tree

Dependency:tree

View results:

watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvd29izw5kawfua3vu/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/southeast ">

Ways to rely on conflict resolution

Test-a:

SOURCE download

Test-b:

SOURCE download

watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvd29izw5kawfua3vu/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/southeast ">

Install Test-a and test-b to the local warehouse for test-c dependencies

TEST.c

SOURCE download

Why is it dependent on Commons-logging-1.1.3.jar?

Because: when the second direct dependence and the third direct dependence are present, it is preferred to select the second direct dependence (path short)

Go on

Test.d

SOURCE download

Install test-d to the local warehouse. For test-c Dependence

Test-c

SOURCE download

Suppose you need to use Test-b's Commons-logging-1.1.3.jar

Capable of adding exclusions in test-d, for example, the following configuration

<dependency><groupId>com.demo.test</groupId><artifactId>test-d</artifactId>< version>0.0.1-snapshot</version><exclusions><exclusion><groupid>commons-logging< /groupid><artifactid>commons-logging</artifactid></exclusion></exclusions></ Dependency>

Copyright notice: This article blog original articles, blogs, without consent, may not be reproduced.

Construction of the project maven slices: 4. Coordination and dependency, spring relies on injection demo