本指南將幫助您了解spring boot starter parent如何幫助管理依賴項版本，所有spring boot項目通常使用spring-boot-starter-parent作為pom.xml中的父項：
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<parent> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-parent</artifactid> <version>1.4.0.release</version> </parent> |
parent poms為多個子項目和模塊管理以下內(nèi)容：
- 配置 - java版本和其他屬性
- depedency management - 依賴項的版本
- 默認(rèn)插件配置
內(nèi)部原理
首先 啟動器spring boot starter parent將spring-boot-dependencies定義為父pom。它從spring-boot-dependencies繼承了依賴關(guān)系管理。
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<parent> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-dependencies</artifactid> <version>1.4.0.release</version> <relativepath>../../spring-boot-dependencies</relativepath></parent> |
默認(rèn)的java版本是1.6。項目可以通過<java.version>1.8</java.version>在項目pom中指定屬性來覆蓋它。還有一些與編碼和源相關(guān)的其他設(shè)置，目標(biāo)版本也在父pom中設(shè)置。
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<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>${java.version}</maven.compiler.target> |
spring boot starter parent指定了一系列插件的默認(rèn)配置，包括maven-failsafe-plugin，maven-jar-plugin和maven-surefire-plugin。
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<plugin> <groupid>org.apache.maven.plugins</groupid> <artifactid>maven-failsafe-plugin</artifactid> <executions> <execution> <goals> <goal>integration-test</goal> <goal>verify</goal> </goals> </execution> </executions></plugin><plugin> <groupid>org.apache.maven.plugins</groupid> <artifactid>maven-jar-plugin</artifactid> <configuration> <archive> <manifest> <mainclass>${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從spring-boot-dependencies繼承了什么？
spring boot dependencies定義了所有spring boot項目的默認(rèn)依賴關(guān)系管理。如果我們想要使用特定依賴項的新版本，我們可以通過在項目pom中指定新屬性來覆蓋該版本。下面的摘錄顯示了由spring boot dependencies父pom管理的一些重要依賴項。由于spring boot starter parent繼承自spring-boot-dependencies，因此它也共享所有這些特性。
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<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> |
將maven 3.2.1定義為所需的最低版本：
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<prerequisites> <maven>3.2.1</maven></prerequisites> |
總結(jié)
以上所述是小編給大家介紹的spring-boot-starter-parent簡介，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復(fù)大家的。在此也非常感謝大家對服務(wù)器之家網(wǎng)站的支持！
原文鏈接：https://www.jdon.com/springboot/spring-boot-starter-parent.html
