spring-security/docs/modules/ROOT/pages/getting-spring-security.adoc

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[[getting]]
= Getting Spring Security
This section describes how to get the Spring Security binaries.
See xref:community.adoc#community-source[Source Code] for how to obtain the source code.
== Release Numbering
Spring Security versions are formatted as MAJOR.MINOR.PATCH such that:
* MAJOR versions may contain breaking changes.
Typically, these are done to provide improved security to match modern security practices.
* MINOR versions contain enhancements but are considered passive updates.
* PATCH level should be perfectly compatible, forwards and backwards, with the possible exception of changes that fix bugs.
[[maven]]
== Usage with Maven
As most open source projects, Spring Security deploys its dependencies as Maven artifacts.
The topics in this section describe how to consume Spring Security when using Maven.
[[getting-maven-boot]]
=== Spring Boot with Maven
Spring Boot provides a `spring-boot-starter-security` starter that aggregates Spring Security-related dependencies.
The simplest and preferred way to use the starter is to use https://docs.spring.io/initializr/docs/current/reference/html/[Spring Initializr] by using an IDE integration in (https://joshlong.com/jl/blogPost/tech_tip_geting_started_with_spring_boot.html[Eclipse] or https://www.jetbrains.com/help/idea/spring-boot.html#d1489567e2[IntelliJ], https://github.com/AlexFalappa/nb-springboot/wiki/Quick-Tour[NetBeans]) or through https://start.spring.io.
Alternatively, you can manually add the starter, as the following example shows:
.pom.xml
[source,xml,subs="verbatim,attributes"]
----
<dependencies>
<!-- ... other dependency elements ... -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
</dependencies>
----
Since Spring Boot provides a Maven BOM to manage dependency versions, you do not need to specify a version.
If you wish to override the Spring Security version, you can do so by providing a Maven property:
.pom.xml
[source,xml,subs="verbatim,attributes"]
----
<properties>
<!-- ... -->
<spring-security.version>{spring-security-version}</spring-security.version>
</properties>
----
Since Spring Security makes breaking changes only in major releases, you can safely use a newer version of Spring Security with Spring Boot.
However, at times, you may need to update the version of Spring Framework as well.
You can do so by adding a Maven property:
.pom.xml
[source,xml,subs="verbatim,attributes"]
----
<properties>
<!-- ... -->
<spring.version>{spring-core-version}</spring.version>
</properties>
----
If you use additional features (such as LDAP, OAuth 2, and others), you need to also include the appropriate xref:modules.adoc#modules[Project Modules and Dependencies].
[[getting-maven-no-boot]]
=== Maven Without Spring Boot
When you use Spring Security without Spring Boot, the preferred way is to use Spring Security's BOM to ensure that a consistent version of Spring Security is used throughout the entire project. The following example shows how to do so:
.pom.xml
[source,xml,ubs="verbatim,attributes"]
----
<dependencyManagement>
<dependencies>
<!-- ... other dependency elements ... -->
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-bom</artifactId>
<version>{spring-security-version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
----
A minimal Spring Security Maven set of dependencies typically looks like the following example:
.pom.xml
[source,xml,subs="verbatim,attributes"]
----
<dependencies>
<!-- ... other dependency elements ... -->
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
</dependency>
</dependencies>
----
If you use additional features (such as LDAP, OAuth 2, and others), you need to also include the appropriate xref:modules.adoc#modules[Project Modules and Dependencies].
Spring Security builds against Spring Framework {spring-core-version} but should generally work with any newer version of Spring Framework 5.x.
Many users are likely to run afoul of the fact that Spring Security's transitive dependencies resolve Spring Framework {spring-core-version}, which can cause strange classpath problems.
The easiest way to resolve this is to use the `spring-framework-bom` within the `<dependencyManagement>` section of your `pom.xml`:
.pom.xml
[source,xml,subs="verbatim,attributes"]
----
<dependencyManagement>
<dependencies>
<!-- ... other dependency elements ... -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-framework-bom</artifactId>
<version>{spring-core-version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
----
The preceding example ensures that all the transitive dependencies of Spring Security use the Spring {spring-core-version} modules.
[NOTE]
====
This approach uses Maven's "`bill of materials`" (BOM) concept and is only available in Maven 2.0.9+.
For additional details about how dependencies are resolved, see https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html[Maven's Introduction to the Dependency Mechanism documentation].
====
[[maven-repositories]]
=== Maven Repositories
All GA releases (that is, versions ending in .RELEASE) are deployed to Maven Central, so you need not declare additional Maven repositories in your pom.
If you use a SNAPSHOT version, you need to ensure that you have the Spring Snapshot repository defined:
.pom.xml
[source,xml]
----
<repositories>
<!-- ... possibly other repository elements ... -->
<repository>
<id>spring-snapshot</id>
<name>Spring Snapshot Repository</name>
<url>https://repo.spring.io/snapshot</url>
</repository>
</repositories>
----
If you use a milestone or release candidate version, you need to ensure that you have the Spring Milestone repository defined, as the following example shows:
.pom.xml
[source,xml]
----
<repositories>
<!-- ... possibly other repository elements ... -->
<repository>
<id>spring-milestone</id>
<name>Spring Milestone Repository</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
----
[[getting-gradle]]
== Gradle
As most open source projects, Spring Security deploys its dependencies as Maven artifacts, which allows for first-class Gradle support.
The following topics describe how to consume Spring Security when using Gradle.
[[getting-gradle-boot]]
=== Spring Boot with Gradle
Spring Boot provides a `spring-boot-starter-security` starter that aggregates Spring Security related dependencies.
The simplest and preferred method to use the starter is to use https://docs.spring.io/initializr/docs/current/reference/html/[Spring Initializr] by using an IDE integration in (https://joshlong.com/jl/blogPost/tech_tip_geting_started_with_spring_boot.html[Eclipse] or https://www.jetbrains.com/help/idea/spring-boot.html#d1489567e2[IntelliJ], https://github.com/AlexFalappa/nb-springboot/wiki/Quick-Tour[NetBeans]) or through https://start.spring.io.
Alternatively, you can manually add the starter:
.build.gradle
[source,groovy]
[subs="verbatim,attributes"]
----
dependencies {
implementation "org.springframework.boot:spring-boot-starter-security"
}
----
Since Spring Boot provides a Maven BOM to manage dependency versions, you need not specify a version.
If you wish to override the Spring Security version, you can do so by providing a Gradle property:
.build.gradle
[source,groovy]
[subs="verbatim,attributes"]
----
ext['spring-security.version']='{spring-security-version}'
----
Since Spring Security makes breaking changes only in major releases, you can safely use a newer version of Spring Security with Spring Boot.
However, at times, you may need to update the version of Spring Framework as well.
You can do so by adding a Gradle property:
.build.gradle
[source,groovy]
[subs="verbatim,attributes"]
----
ext['spring.version']='{spring-core-version}'
----
If you use additional features (such as LDAP, OAuth 2, and others), you need to also include the appropriate xref:modules.adoc#modules[Project Modules and Dependencies].
=== Gradle Without Spring Boot
When you use Spring Security without Spring Boot, the preferred way is to use Spring Security's BOM to ensure a consistent version of Spring Security is used throughout the entire project.
You can do so by using the https://github.com/spring-gradle-plugins/dependency-management-plugin[Dependency Management Plugin]:
.build.gradle
[source,groovy]
[subs="verbatim,attributes"]
----
plugins {
id "io.spring.dependency-management" version "1.0.6.RELEASE"
}
dependencyManagement {
imports {
mavenBom 'org.springframework.security:spring-security-bom:{spring-security-version}'
}
}
----
A minimal Spring Security Maven set of dependencies typically looks like the following:
.build.gradle
[source,groovy]
[subs="verbatim,attributes"]
----
dependencies {
implementation "org.springframework.security:spring-security-web"
implementation "org.springframework.security:spring-security-config"
}
----
If you use additional features (such as LDAP, OAuth 2, and others), you need to also include the appropriate xref:modules.adoc#modules[Project Modules and Dependencies].
Spring Security builds against Spring Framework {spring-core-version} but should generally work with any newer version of Spring Framework 5.x.
Many users are likely to run afoul of the fact that Spring Security's transitive dependencies resolve Spring Framework {spring-core-version}, which can cause strange classpath problems.
The easiest way to resolve this is to use the `spring-framework-bom` within your `dependencyManagement` section of your `build.gradle`.
You can do so by using the https://github.com/spring-gradle-plugins/dependency-management-plugin[Dependency Management Plugin]:
.build.gradle
[source,groovy]
[subs="verbatim,attributes"]
----
plugins {
id "io.spring.dependency-management" version "1.0.6.RELEASE"
}
dependencyManagement {
imports {
mavenBom 'org.springframework:spring-framework-bom:{spring-core-version}'
}
}
----
The preceding example ensures that all the transitive dependencies of Spring Security use the Spring {spring-core-version} modules.
[[gradle-repositories]]
=== Gradle Repositories
All GA releases (that is, versions ending in .RELEASE) are deployed to Maven Central, so using the `mavenCentral()` repository is sufficient for GA releases. The following example shows how to do so:
.build.gradle
[source,groovy]
----
repositories {
mavenCentral()
}
----
If you use a SNAPSHOT version, you need to ensure that you have the Spring Snapshot repository defined:
.build.gradle
[source,groovy]
----
repositories {
maven { url 'https://repo.spring.io/snapshot' }
}
----
If you use a milestone or release candidate version, you need to ensure that you have the Spring Milestone repository defined:
.build.gradle
[source,groovy]
----
repositories {
maven { url 'https://repo.spring.io/milestone' }
}
----