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Documentation
This commit is contained in:
Phillip Webb
parent
ec36efd50f
commit
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@ -3,7 +3,6 @@ Spring Boot is released under the non-restrictive Apache 2.0 license. If you wou
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to contribute something, or simply want to hack on the code this document should help
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you get started.
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## Working with the code
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If you don't have an IDE preference we would recommend that you use
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[Spring Tools Suite](http://www.springsource.com/developer/sts) or
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@ -11,7 +10,6 @@ If you don't have an IDE preference we would recommend that you use
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[m2eclipe](http://eclipse.org/m2e/) eclipse plugin for maven support. Other IDEs
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and tools should also work without issue.
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### Building from source
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To build the source you will need to install
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[Apache Maven](http://maven.apache.org/run-maven/index.html) v3.0 or above. The project
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@ -24,7 +22,6 @@ to submit a pull request:
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$ mvn clean install -DskipTests
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### Importing into eclipse with m2eclipse
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We recommend the [m2eclipe](http://eclipse.org/m2e/) eclipse plugin when working with
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eclipse. If you don't already have m2eclipse installed it is available from the "eclipse
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@ -47,7 +44,6 @@ With the requisite eclipse plugins installed you can select
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`import existing maven projects` from the `file` menu to import the code. You will
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need to import the root `spring-boot` pom and the `spring-boot-samples` pom separately.
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### Importing into eclipse without m2eclipse
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If you prefer not to use m2eclipse you can generate eclipse project meta-data using the
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following command:
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@ -60,13 +56,10 @@ from the `file` menu.
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### Importing into other IDEs
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Maven is well supported by most Java IDEs. Refer to you vendor documentation.
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### Integration tests
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The sample application are used as integration tests during the build
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(when you `mvn install`). Due to the fact that they make use of the
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`spring-package-maven-plugin` they cannot be called directly, and so
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instead are launched via the `maven-invoker-plugin`. If you encounter
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build failures running the integration tests, check the `build.log`
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file in the appropriate sample directory.
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The sample application are used as integration tests during the build (when you
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`mvn install`). Due to the fact that they make use of the `spring-boot-maven-plugin`
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they cannot be called directly, and so instead are launched via the
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`maven-invoker-plugin`. If you encounter build failures running the integration tests,
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check the `build.log` file in the appropriate sample directory.
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274
README.md
274
README.md
@ -1,188 +1,190 @@
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# Spring Boot
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Spring Boot is "Spring for Snowboarders". If you are kewl, or just impatient, and you
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want to use Spring, then this is the place to be. Spring Boot is the code-name for a
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group of related technologies, that will get you up and running with
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Spring-powered, production-grade applications and services with absolute minimum fuss.
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It takes an opinionated view of the Spring family so that new and existing users can
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quickly get to the bits they need. Assumes limited knowledge of the Java development
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ecosystem. Absolutely no code generation and no XML (unless you really want it).
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Spring Boot makes it easy to create Spring-powered, production-grade applications and
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services with absolute minimum fuss. It takes an opinionated view of the Spring platform
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so that new and existing users can quickly get to the bits they need.
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The goals are:
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You can use Spring Boot to create stand-alone Java applications that can be started using
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`java -jar` or more traditional WAR deployments. We also provide a command line tool
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that runs spring scripts.
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* Radically faster and widely accessible getting started experience for Spring
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development
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Our primary goals are:
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* Provide a radically faster and widely accessible getting started experience for all
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Spring development
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* Be opinionated out of the box, but get out of the way quickly as requirements start to
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diverge from the defaults
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* Provide a range of non-functional features that are common to large classes of projects
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(e.g. embedded servers, security, metrics, health checks, externalized configuration)
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* First class support for REST-ful services, modern web applications, batch jobs, and
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enterprise integration
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* Applications that adapt their behavior or configuration to their environment
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* Optionally use Groovy features like DSLs and AST transformations to accelerate the
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implementation of basic business requirements
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* Absolutely no code generation and no requirement for XML configuration
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## Quick Start Script Example
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The Spring Zero command line tool uses [Groovy](http://groovy.codehaus.org/) underneath
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so that we can present simple Spring snippets that can 'just run', for example:
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## Installing
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You need to [build from source](#building-from-source) for now, but when it's done
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instructions will look like this:
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1) Get Java. Download and install the Java SDK from [www.java.com](http://www.java.com)
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2) Get Spring
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$ curl -s initializr.cfapps.io/installer | bash
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or use the [Windows installer](#installing)
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## Building from source
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Spring Zero can be [built with maven](http://maven.apache.org/run-maven/index.html) v3.0
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or above.
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$ mvn clean install
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An `alias` can be used for the Spring Boot command line tool:
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$ alias spring="java -jar ~/.m2/repository/org/springframework/boot/spring-cli/0.5.0.BUILD-SNAPSHOT/spring-cli-0.5.0.BUILD-SNAPSHOT.jar"
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_Also see [docs/CONTRIBUTING](docs/CONTRIBUTING.md) if you want to submit pull requests._
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## Quick Start Example
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The Spring Zero command line tool uses Groovy underneath so that we can present simple
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snippets that can just run, for example:
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$ cat > app.groovy
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@Controller
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class ThisWillActuallyRun {
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@RequestMapping("/")
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@ResponseBody
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String home() {
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return "Hello World!"
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}
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```groovy
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@Controller
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class ThisWillActuallyRun {
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@RequestMapping("/")
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@ResponseBody
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String home() {
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return "Hello World!"
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}
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<ctrl-d>
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$ spring run app.groovy
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$ curl localhost:8080
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Hello World!
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}
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```
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```
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$ spring run app.groovy
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$ curl localhost:8080
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Hello World!
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```
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_See [below](#installing-the-cli) for command line tool installation instructions._
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## Quick Start Java Example
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If you don't want to use the command line tool, or you would rather work using Java and
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an IDE you can. Just add a `main()` method that calls `SpringApplication` and
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add `@EnableAutoConfiguration`:
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import org.springframework.stereotype.*;
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import org.springframework.web.bind.annotation.*;
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import org.springframework.boot.context.annotation.*;
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```java
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import org.springframework.boot.*;
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import org.springframework.boot.autoconfiguration.*;
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import org.springframework.stereotype.*;
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import org.springframework.web.bind.annotation.*;
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@Controller
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@EnableAutoConfiguration
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public class SampleController {
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@RequestMapping("/")
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@ResponseBody
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String home() {
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return "Hello World!"
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}
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public static void main(String[] args) throws Exception {
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SpringApplication.run(SampleController.class, args);
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}
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@Controller
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@EnableAutoConfiguration
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public class SampleController {
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@RequestMapping("/")
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@ResponseBody
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String home() {
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return "Hello World!"
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}
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_NOTE: the above example assumes your build system has imported the `spring-starter-web`
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maven pom._
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public static void main(String[] args) throws Exception {
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SpringApplication.run(SampleController.class, args);
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}
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}
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```
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## Spring Boot Components
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There are a number of components in Boot. Here are the important ones:
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_NOTE: the above example assumes your build system has imported the `spring-starter-web` maven pom._
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### The Spring CLI
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The 'spring' command line application compiles and runs Groovy source, making it super
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easy to write the absolute minimum of code to get an application running. Spring CLI
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can also watch files, automatically recompiling and restarting when they change.
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## Installing the CLI
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You need [Java SDK v1.6](http://www.java.com) or higher to run the command line tool. You
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should check your current Java installation before you begin:
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*See [spring-cli/README](spring-cli/README.md).*
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$ java -version
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Complete installation instructions TBD. For now you can
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[build from source](#building-from-source).
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## Building from source
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Spring Boot can be [built with maven](http://maven.apache.org/run-maven/index.html) v3.0
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or above.
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### Spring Boot
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The main library providing features that support the other parts of Spring Boot.
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Features include:
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$ mvn clean install
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* `SpringApplication` - a class with static convenience methods that make it really easy
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to write a standalone Spring Application. Its sole job is to create and refresh an
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appropriate Spring `ApplicationContext`.
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You can use an `alias` for the Spring Boot command line tool:
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$ alias spring="java -jar ~/.m2/repository/org/springframework/boot/spring-cli/0.5.0.BUILD-SNAPSHOT/spring-cli-0.5.0.BUILD-SNAPSHOT.jar"
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_Also see [CONTRIBUTING.md] if you wish to submit pull requests._
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## Spring Boot Modules
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There are a number of modules in Spring Boot. Here are the important ones:
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### spring-boot
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The main library providing features that support the other parts of Spring Boot,
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these include:
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* The `SpringApplication` class, providing static convenience methods that make it easy
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to write a stand-alone Spring Application. Its sole job is to create and refresh an
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appropriate Spring `ApplicationContext`
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* Embedded web applications with a choice of container (Tomcat or Jetty for now)
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* First class externalized configuration support
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* Convenience `ApplicationContext` initializers, including support for sensible logging
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defaults.
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_See [spring-boot/README](spring-boot/README.md)._
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_See [spring-boot/README.md](spring-boot/README.md)._
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### Spring Autoconfigure
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Spring Zero can configure large parts of common applications based on detecting the
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content of the classpath and any existing application context. A single
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`@EnableAutoConfigure` annotation triggers auto-configuration of the Spring context.
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### spring-boot-autoconfigure
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Spring Boot can configure large parts of common applications based on the content
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of their classpath. A single `@EnableAutoConfiguration` annotation triggers
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auto-configuration of the Spring context.
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Auto-configuration attempts to guess what beans a user might want based on their
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classpath. For example, If a 'HSQLDB' is on the classpath the user probably wants an
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in-memory database to be defined. Auto-configuration will back away as the user starts
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to define their own beans.
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Auto-configuration attempts to deduce which beans a user might need. For example, If
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'HSQLDB' is on the classpath, and the user has not configured any database connections,
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then they probably want an in-memory database to be defined. Auto-configuration will
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always back away as the user starts to define their own beans.
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_See [spring-autoconfigure/README](spring-autoconfigure/README.md)._
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_See [spring-boot-autoconfigure/README.md](spring-boot-autoconfigure/README.md)._
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### Spring Actuator
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Spring Actuator uses auto-configuration to decorate your application with features that
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make it instantly deployable and supportable in production. For instance if you are
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writing a JSON web service then it will provide a server, security, logging, externalized
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configuration, management endpoints, an audit abstraction, and more. If you want to
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switch off the built in features, or extend or replace them, it makes that really easy as well.
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_See [spring-actuator/README](spring-actuator/README.md)._
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### Spring Starters
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Spring Starters are a set of convenient dependency descriptors that you can include in
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### spring-boot-starters
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Starters are a set of convenient dependency descriptors that you can include in
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your application. You get a one-stop-shop for all the Spring and related technology
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that you need without having to hunt through sample code and copy paste loads of
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dependency descriptors. For example, if you want to get started using Spring and JPA for
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database access just include one dependency in your project, and you are good to go.
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database access just include the `spring-boot-starter-data-jpa` dependency in your
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project, and you are good to go.
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_See [spring-starters/README](spring-starters/README.md)._
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_See [spring-boot-starters/README.md](spring-boot-starters/README.md)._
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### Packaging
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The [spring-launcher](spring-launcher/) and
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[spring-maven-packaging-plugin](spring-maven-packaging-plugin) provide a convenient way
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to package you application for release. Applications can be released as a single jar
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file that can simply be launched using `java -jar`.
|
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### spring-boot-cli
|
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The Spring command line application compiles and runs Groovy source, making it super
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easy to write the absolute minimum of code to get an application running. Spring CLI
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can also watch files, automatically recompiling and restarting when they change.
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|
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_See [spring-launcher/README](spring-launcher/README.md) &
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[spring-package-maven-plugin/README](spring-package-maven-plugin/README.md)._
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*See [spring-boot-cli/README.md](spring-boot-cli/README.md).*
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### spring-boot-ops
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Ops uses auto-configuration to decorate your application with features that
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make it instantly deployable and supportable in production. For instance if you are
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writing a JSON web service then it will provide a server, security, logging, externalized
|
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configuration, management endpoints, an audit abstraction, and more. If you want to
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switch off the built in features, or extend or replace them, it makes that really easy as
|
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well.
|
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|
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_See [spring-boot-ops/README.md](spring-boot-ops/README.md)._
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### spring-boot-loader
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Loader provides the secret sauce that allows you to build a single jar file that can be
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launched using `java -jar`. Generally you will not need to use `spring-boot-loader`
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directly but instead work with the
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[Gradle](spring-boot-gradle-plugin/README.md) or
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[Maven](spring-boot-maven-plugin/README.md) plugin.
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_See [spring-boot-loader/README.md](spring-boot-loader/README.md)._
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## Samples
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Groovy samples for use with the command line application are available in
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[spring-cli/samples](spring-cli/samples/#). To run the CLI samples type
|
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[spring-boot-cli/samples](spring-boot-cli/samples/#). To run the CLI samples type
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`spring run <sample>.groovy` from samples directory.
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Java samples are available in [spring-boot-sample](spring-boot-samples/#) and should
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be build with maven and run use `java -jar target/<sample>.jar`. The following java
|
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Java samples are available in [spring-boot-samples](spring-boot-samples/#) and should
|
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be build with maven and run use `java -jar target/<sample>.jar`. The following java
|
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samples are provided:
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* spring-boot-sample-simple - A simple command line application
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* spring-boot-sample-tomcat - Embedded Tomcat
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* spring-boot-sample-jetty - Embedded Jetty
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* spring-boot-sample-actuator - Simple REST service with production features
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* spring-boot-sample-actuator-ui - A web UI example with production features
|
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* spring-boot-sample-web-ui - A thymeleaf web application
|
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* spring-sample-batch - Define and run a Batch job in a few lines of code
|
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* spring-sample-data-jpa - Spring Data JPA + Hibernate + HSQLDB
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* spring-boot-sample-integration - A spring integration application
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* spring-boot-sample-profile - example showing Spring's `@profile` support
|
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* spring-boot-sample-traditional - shows Spring Zero with more traditional WAR packaging
|
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* [spring-boot-sample-simple](spring-boot-sample-simple) - A simple command line application
|
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* [spring-boot-sample-tomcat](spring-boot-sample-tomcat) - Embedded Tomcat
|
||||
* [spring-boot-sample-jetty](spring-boot-sample-jetty) - Embedded Jetty
|
||||
* [spring-boot-sample-ops](spring-boot-sample-ops) - Simple REST service with production features
|
||||
* [spring-boot-sample-ops-ui](spring-boot-sample-ops-ui) - A web UI example with production features
|
||||
* [spring-boot-sample-web-ui](spring-boot-sample-web-ui) - A thymeleaf web application
|
||||
* [spring-boot-sample-web-static](spring-boot-sample-web-static) - A web application service static files
|
||||
* [spring-sample-batch](spring-sample-batch) - Define and run a Batch job in a few lines of code
|
||||
* [spring-sample-data-jpa](spring-sample-data-jpa) - Spring Data JPA + Hibernate + HSQLDB
|
||||
* [spring-boot-sample-integration](spring-boot-sample-integration) - A spring integration application
|
||||
* [spring-boot-sample-profile](spring-boot-sample-profile) - example showing Spring's `@profile` support
|
||||
* [spring-boot-sample-traditional](spring-boot-sample-traditional) - shows more traditional WAR packaging
|
||||
(but also executable using `java -jar`)
|
||||
* spring-boot-sample-xml - Example show how Spring Boot can be mixed with traditional XML
|
||||
configuration
|
||||
|
||||
* [spring-boot-sample-xml](spring-boot-sample-xml) - Example show how Spring Boot can be mixed with traditional
|
||||
XML configuration (we generally recommend using Java `@Configuration` whenever possible)
|
||||
|
||||
153
docs/SCRAPBOOK.md
Normal file
153
docs/SCRAPBOOK.md
Normal file
@ -0,0 +1,153 @@
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# Docs without a home as yet :(
|
||||
|
||||
|
||||
|Feature |Implementation |Notes |
|
||||
|---|---|---|
|
||||
|Launch Spring from Java main |SpringApplication | Plenty of convenience methods and customization opportunities |
|
||||
|Server |Tomcat or Jetty | |
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||||
|Logging |Logback, Log4j or JDK | Sensible defaults configurations. |
|
||||
|Externalized configuration | Properties or YAML | Support for Spring profiles. Bind automatically to @Bean. |
|
||||
|
||||
For a quick introduction and to get started quickly with a new
|
||||
project, carry on reading. For more in depth coverage of the features
|
||||
of Spring Boot.Strap, go to the [Feature Guide](docs/Features.md).
|
||||
|
||||
# Getting Started
|
||||
|
||||
You will need Java (6 at least) and a build tool (Maven is what we use
|
||||
below, but you are more than welcome to use gradle). These can be
|
||||
downloaded or installed easily in most operating systems. For Ubuntu:
|
||||
|
||||
$ sudo apt-get install openjdk-6-jdk maven
|
||||
|
||||
<!--FIXME: short instructions for Mac.-->
|
||||
|
||||
## A basic project
|
||||
|
||||
If you are using Maven create a really simple `pom.xml` with 2 dependencies:
|
||||
|
||||
`pom.xml`
|
||||
|
||||
```
|
||||
<project>
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<groupId>com.mycompany</groupId>
|
||||
<artifactId>myproject</artifactId>
|
||||
<version>1.0.0-SNAPSHOT</version>
|
||||
<packaging>jar</packaging>
|
||||
<properties>
|
||||
<start-class>com.mycompany.Application</start-class>
|
||||
</properties>
|
||||
<parent>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-starter-parent</artifactId>
|
||||
<version>{{project.version}}</version>
|
||||
</parent>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-starter</artifactId>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
<build>
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-package-maven-plugin</artifactId>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
</project>
|
||||
```
|
||||
|
||||
If you like Gradle, that's fine, and you will know what to do with
|
||||
those dependencies. The one dependency adds Spring Boot.Config auto
|
||||
configuration and the Tomcat container to your application. If you
|
||||
prefer Jetty you can just add the embedded Jetty jars to your
|
||||
classpath instead of Tomcat.
|
||||
|
||||
Now write a simple main class
|
||||
|
||||
`Application.java`
|
||||
```
|
||||
package com.mycompany;
|
||||
|
||||
import org.springframework.boot.SpringApplication;
|
||||
import org.springframework.context.annotation.Configuration;
|
||||
|
||||
@Configuration
|
||||
public class Application {
|
||||
|
||||
public static void main(String[] args) {
|
||||
SpringApplication.run(Application.class, args);
|
||||
}
|
||||
|
||||
}
|
||||
```
|
||||
|
||||
You should be able to run it already:
|
||||
|
||||
$ mvn package
|
||||
$ java -jar target/myproject-1.0.0-SNAPSHOT.jar
|
||||
|
||||
. ____ _ __ _ _
|
||||
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
|
||||
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
|
||||
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
|
||||
' |____| .__|_| |_|_| |_\__, | / / / /
|
||||
=========|_|==============|___/=/_/_/_/
|
||||
Spring Bootstrap
|
||||
|
||||
2013-07-19 17:13:51.673 INFO 18937 --- [ main] com.mycompany.Application ...
|
||||
... <logs showing application starting up>
|
||||
|
||||
It doesn't do anything yet, but that's because all we did is start a
|
||||
Spring `ApplicationContext` and let it close when the JVM stopped.
|
||||
|
||||
To make it do something a little bit more interesting you could bind
|
||||
some command line arguments to the application:
|
||||
|
||||
`Application.java`
|
||||
```
|
||||
@Configuration
|
||||
@ConfigurationProperties
|
||||
@EnableConfigurationProperties
|
||||
public class Application {
|
||||
|
||||
private String message;
|
||||
|
||||
@Override
|
||||
public void run(String... args) throws Exception {
|
||||
System.err.println(message);
|
||||
}
|
||||
|
||||
public static void main(String[] args) {
|
||||
SpringApplication.run(Application.class, args);
|
||||
}
|
||||
|
||||
public String getMessage() {
|
||||
return message;
|
||||
}
|
||||
|
||||
public void setMessage(String message) {
|
||||
this.message = message;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
The `@ConfigurationProperties` annotation binds the Spring
|
||||
`Environment` (including command line arguments) to the `Application`
|
||||
instance, and `CommandLineRunner` is a marker interface for anything
|
||||
you want to be executed after the content is started. So run it
|
||||
again and you will see the message:
|
||||
|
||||
```
|
||||
$ mvn package
|
||||
$ java -jar target/myproject-1.0.0-SNAPSHOT.jar --message="Hello World"
|
||||
...
|
||||
Hello World
|
||||
```
|
||||
|
||||
To add more features, add some `@Bean` definitions to your
|
||||
`Application` class, and read more in the
|
||||
[Feature Guide](docs/Features.md).
|
||||
@ -1,156 +1,104 @@
|
||||
# Spring Boot.Strap
|
||||
# Spring Boot
|
||||
Spring Boot provides the central features for the other modules in the project. It is
|
||||
relatively unopinionated and it has minimal dependencies which makes it usable as a
|
||||
stand-alone library for anyone whose tastes diverge from ours.
|
||||
|
||||
Spring Boot.Strap provides features for the other parts of Spring
|
||||
Boot. It is relatively unopinionated and therefore usable as a
|
||||
standalone library for anyone whose tastes diverge from ours.
|
||||
|
||||
|Feature |Implementation |Notes |
|
||||
|---|---|---|
|
||||
|Launch Spring from Java main |SpringApplication | Plenty of convenience methods and customization opportunities |
|
||||
|Server |Tomcat or Jetty | |
|
||||
|Logging |Logback, Log4j or JDK | Sensible defaults configurations. |
|
||||
|Externalized configuration | Properties or YAML | Support for Spring profiles. Bind automatically to @Bean. |
|
||||
|
||||
For a quick introduction and to get started quickly with a new
|
||||
project, carry on reading. For more in depth coverage of the features
|
||||
of Spring Boot.Strap, go to the [Feature Guide](docs/Features.md).
|
||||
|
||||
# Getting Started
|
||||
|
||||
You will need Java (6 at least) and a build tool (Maven is what we use
|
||||
below, but you are more than welcome to use gradle). These can be
|
||||
downloaded or installed easily in most operating systems. For Ubuntu:
|
||||
|
||||
$ sudo apt-get install openjdk-6-jdk maven
|
||||
|
||||
<!--FIXME: short instructions for Mac.-->
|
||||
|
||||
## A basic project
|
||||
|
||||
If you are using Maven create a really simple `pom.xml` with 2 dependencies:
|
||||
|
||||
`pom.xml`
|
||||
|
||||
```
|
||||
<project>
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<groupId>com.mycompany</groupId>
|
||||
<artifactId>myproject</artifactId>
|
||||
<version>1.0.0-SNAPSHOT</version>
|
||||
<packaging>jar</packaging>
|
||||
<properties>
|
||||
<start-class>com.mycompany.Application</start-class>
|
||||
</properties>
|
||||
<parent>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-starter-parent</artifactId>
|
||||
<version>{{project.version}}</version>
|
||||
</parent>
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-starter</artifactId>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
<build>
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-package-maven-plugin</artifactId>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
</project>
|
||||
```
|
||||
|
||||
If you like Gradle, that's fine, and you will know what to do with
|
||||
those dependencies. The one dependency adds Spring Boot.Config auto
|
||||
configuration and the Tomcat container to your application. If you
|
||||
prefer Jetty you can just add the embedded Jetty jars to your
|
||||
classpath instead of Tomcat.
|
||||
|
||||
Now write a simple main class
|
||||
|
||||
`Application.java`
|
||||
```
|
||||
package com.mycompany;
|
||||
|
||||
import org.springframework.boot.SpringApplication;
|
||||
import org.springframework.context.annotation.Configuration;
|
||||
|
||||
@Configuration
|
||||
public class Application {
|
||||
|
||||
public static void main(String[] args) {
|
||||
SpringApplication.run(Application.class, args);
|
||||
}
|
||||
## SpringApplication
|
||||
The `SpringApplication` class provides a convenient way to bootstrap a Spring application
|
||||
that will be started from a `main()` method. In many situations you can just delegate
|
||||
to the static `SpringApplication.run` method:
|
||||
|
||||
```java
|
||||
public static void main(String[] args) {
|
||||
SpringApplication.run(SpringConfiguration.class, args);
|
||||
}
|
||||
```
|
||||
|
||||
You should be able to run it already:
|
||||
When you application starts you should see something similar to the following:
|
||||
|
||||
$ mvn package
|
||||
$ java -jar target/myproject-1.0.0-SNAPSHOT.jar
|
||||
|
||||
. ____ _ __ _ _
|
||||
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
|
||||
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
|
||||
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
|
||||
' |____| .__|_| |_|_| |_\__, | / / / /
|
||||
=========|_|==============|___/=/_/_/_/
|
||||
Spring Bootstrap
|
||||
|
||||
2013-07-19 17:13:51.673 INFO 18937 --- [ main] com.mycompany.Application ...
|
||||
... <logs showing application starting up>
|
||||
|
||||
It doesn't do anything yet, but that's because all we did is start a
|
||||
Spring `ApplicationContext` and let it close when the JVM stopped.
|
||||
|
||||
To make it do something a little bit more interesting you could bind
|
||||
some command line arguments to the application:
|
||||
|
||||
`Application.java`
|
||||
```
|
||||
@Configuration
|
||||
@ConfigurationProperties
|
||||
@EnableConfigurationProperties
|
||||
public class Application {
|
||||
. ____ _ __ _ _
|
||||
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
|
||||
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
|
||||
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
|
||||
' |____| .__|_| |_|_| |_\__, | / / / /
|
||||
=========|_|==============|___/=/_/_/_/
|
||||
Spring Boot (v0.5.0.BUILD-SNAPSHOT)
|
||||
|
||||
private String message;
|
||||
2013-07-31 00:08:16.117 INFO 56603 --- [ main] o.s.b.s.app.SampleApplication : Starting SampleApplication v0.1.0 on mycomputer with PID 56603 (/apps/myapp.jar started by pwebb)
|
||||
2013-07-31 00:08:16.166 INFO 56603 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6e5a8246: startup date [Wed Jul 31 00:08:16 PDT 2013]; root of context hierarchy
|
||||
```
|
||||
|
||||
@Override
|
||||
public void run(String... args) throws Exception {
|
||||
System.err.println(message);
|
||||
}
|
||||
By default `INFO` logging messages will shown, including some relevant startup information
|
||||
such as the user that started the application.
|
||||
|
||||
public static void main(String[] args) {
|
||||
SpringApplication.run(Application.class, args);
|
||||
}
|
||||
### Customizing SpringApplication
|
||||
If the SpringApplication defaults aren't to your taste you can instead create a local
|
||||
instance and customize it. For example, to turn off the banner you would write:
|
||||
|
||||
public String getMessage() {
|
||||
return message;
|
||||
}
|
||||
|
||||
public void setMessage(String message) {
|
||||
this.message = message;
|
||||
}
|
||||
```java
|
||||
public static void main(String[] args) {
|
||||
SpringApplication app = new SpringApplication(SpringConfiguration.class);
|
||||
app.setShowBanner(false);
|
||||
app.run(args);
|
||||
}
|
||||
```
|
||||
|
||||
The `@ConfigurationProperties` annotation binds the Spring
|
||||
`Environment` (including command line arguments) to the `Application`
|
||||
instance, and `CommandLineRunner` is a marker interface for anything
|
||||
you want to be executed after the content is started. So run it
|
||||
again and you will see the message:
|
||||
See the `SpringApplication` Javadoc for a complete list of the configuration options
|
||||
|
||||
```
|
||||
$ mvn package
|
||||
$ java -jar target/myproject-1.0.0-SNAPSHOT.jar --message="Hello World"
|
||||
...
|
||||
Hello World
|
||||
### Accessing command line properties
|
||||
By default `SpringApplication` will expose any command line arguments as Spring
|
||||
Properties. This allows you to easily access arguments using by injecting them
|
||||
as `@Values`
|
||||
|
||||
```java
|
||||
import org.springframework.stereotype.*
|
||||
import org.springframework.beans.factory.annotation.*
|
||||
|
||||
@Component
|
||||
public class MyBean {
|
||||
|
||||
@Value("${name}")
|
||||
private String name;
|
||||
// Running 'java -jar myapp.jar --name=Spring' will set this to "Spring"
|
||||
|
||||
// ...
|
||||
}
|
||||
```
|
||||
|
||||
To add more features, add some `@Bean` definitions to your
|
||||
`Application` class, and read more in the
|
||||
[Feature Guide](docs/Features.md).
|
||||
### CommandLineRunner beans
|
||||
If you wan't access to the raw command line argument, or you need to run some specific
|
||||
code once the `SpringApplication` has started you can implement the `CommandLineRunner`
|
||||
interface. The `run(String... args)` method will be called on all spring beans
|
||||
implementing the interface.
|
||||
|
||||
```java
|
||||
import org.springframework.boot.*
|
||||
import org.springframework.stereotype.*
|
||||
|
||||
@Component
|
||||
public class MyBean implements CommandLineRunner {
|
||||
|
||||
public void run(String... args) {
|
||||
// Do something...
|
||||
}
|
||||
|
||||
}
|
||||
```
|
||||
|
||||
You can additionally implement the `org.springframework.core.Ordered` interface or use
|
||||
the `org.springframework.core.annotation.Order` annotation if serveral `CommandLineRunner`
|
||||
beans are defined that must be called in a specific order.
|
||||
|
||||
### Application Exit
|
||||
|
||||
|
||||
|
||||
## Embedded Servlet Container Support
|
||||
|
||||
## External Configuration
|
||||
|
||||
## Conditionals
|
||||
|
||||
## ApplicationContextInitializers
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user