本指南将帮助您了解spring boot starter parent如何帮助管理依赖项版本，所有spring boot项目通常使用spring-boot-starter-parent作为pom.xml中的父项：
|
1
2
3
4
5
|
<parent> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-parent</artifactid> <version>1.4.0.release</version> </parent> |
parent poms为多个子项目和模块管理以下内容：
- 配置 - java版本和其他属性
- depedency management - 依赖项的版本
- 默认插件配置
内部原理
首先 启动器spring boot starter parent将spring-boot-dependencies定义为父pom。它从spring-boot-dependencies继承了依赖关系管理。
|
1
2
3
4
5
6
|
<parent> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-dependencies</artifactid> <version>1.4.0.release</version> <relativepath>../../spring-boot-dependencies</relativepath></parent> |
默认的java版本是1.6。项目可以通过<java.version>1.8</java.version>在项目pom中指定属性来覆盖它。还有一些与编码和源相关的其他设置，目标版本也在父pom中设置。
|
1
2
3
4
5
6
|
<java.version>1.6</java.version><resource.delimiter>@</resource.delimiter> <!-- delimiter that doesn't clash with spring ${} placeholders --><project.build.sourceencoding>utf-8</project.build.sourceencoding><project.reporting.outputencoding>utf-8</project.reporting.outputencoding><maven.compiler.source>${java.version}</maven.compiler.source><maven.compiler.target>${java.version}</maven.compiler.target> |
spring boot starter parent指定了一系列插件的默认配置，包括maven-failsafe-plugin，maven-jar-plugin和maven-surefire-plugin。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
<plugin> <groupid>org.apache.maven.plugins</groupid> <artifactid>maven-failsafe-plugin</artifactid> <executions> <execution> <goals> <goal>integration-test</goal> <goal>verify</goal> </goals> </execution> </executions></plugin><plugin> <groupid>org.apache.maven.plugins</groupid> <artifactid>maven-jar-plugin</artifactid> <configuration> <archive> <manifest> <mainclass>${start-class}</mainclass> <adddefaultimplementationentries>true</adddefaultimplementationentries> </manifest> </archive> </configuration></plugin><plugin> <groupid>org.apache.maven.plugins</groupid> <artifactid>maven-surefire-plugin</artifactid> <configuration> <includes> <include>**/*tests.java</include> <include>**/*test.java</include> </includes> <excludes> <exclude>**/abstract*.java</exclude> </excludes> </configuration></plugin> |
spring boot starter parent从spring-boot-dependencies继承了什么？
spring boot dependencies定义了所有spring boot项目的默认依赖关系管理。如果我们想要使用特定依赖项的新版本，我们可以通过在项目pom中指定新属性来覆盖该版本。下面的摘录显示了由spring boot dependencies父pom管理的一些重要依赖项。由于spring boot starter parent继承自spring-boot-dependencies，因此它也共享所有这些特性。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
<properties> <activemq.version>5.13.4</activemq.version> ... <ehcache.version>2.10.2.2.21</ehcache.version> <ehcache3.version>3.1.1</ehcache3.version> ... <h2.version>1.4.192</h2.version> <hamcrest.version>1.3</hamcrest.version> <hazelcast.version>3.6.4</hazelcast.version> <hibernate.version>5.0.9.final</hibernate.version> <hibernate-validator.version>5.2.4.final</hibernate-validator.version> <hikaricp.version>2.4.7</hikaricp.version> <hikaricp-java6.version>2.3.13</hikaricp-java6.version> <hornetq.version>2.4.7.final</hornetq.version> <hsqldb.version>2.3.3</hsqldb.version> <htmlunit.version>2.21</htmlunit.version> <httpasyncclient.version>4.1.2</httpasyncclient.version> <httpclient.version>4.5.2</httpclient.version> <httpcore.version>4.4.5</httpcore.version> <infinispan.version>8.2.2.final</infinispan.version> <jackson.version>2.8.1</jackson.version> .... <jersey.version>2.23.1</jersey.version> <jest.version>2.0.3</jest.version> <jetty.version>9.3.11.v20160721</jetty.version> <jetty-jsp.version>2.2.0.v201112011158</jetty-jsp.version> <spring-security.version>4.1.1.release</spring-security.version> <tomcat.version>8.5.4</tomcat.version> <undertow.version>1.3.23.final</undertow.version> <velocity.version>1.7</velocity.version> <velocity-tools.version>2.0</velocity-tools.version> <webjars-hal-browser.version>9f96c74</webjars-hal-browser.version> <webjars-locator.version>0.32</webjars-locator.version> <wsdl4j.version>1.6.3</wsdl4j.version> <xml-apis.version>1.4.01</xml-apis.version></properties> |
将maven 3.2.1定义为所需的最低版本：
|
1
2
3
|
<prerequisites> <maven>3.2.1</maven></prerequisites> |
总结
以上所述是小编给大家介绍的spring-boot-starter-parent简介，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：https://www.jdon.com/springboot/spring-boot-starter-parent.html
