Spring is a very popular Java-based framework for building web and enterprise applications. Unlike many other frameworks, which focus on only one area, Spring framework provides a wide verity of features addressing the modern business needs via its portfolio projects.
In relation to Spring, Spring Boot aims to make it easy to create Spring-powered, production-grade applications and services with minimum fuss. It takes an opinionated view of the Spring platform so that new and existing users can quickly get to the bits they need.
The diagram below shows Spring Boot as a point of focus on the larger Spring ecosystem:
The primary goals of Spring Boot are:
To provide a radically faster and widely accessible ‘getting started’ experience for all Spring development.
To be opinionated out of the box, but get out of the way quickly as requirements start to diverge from the defaults.
To provide a range of non-functional features that are common to large classes of projects (e.g. embedded servers, security, metrics, health checks, externalized configuration).
Spring Boot does not generate code and there is absolutely no requirement for XML configuration.
https://github.com/boylegu/SpringBoot-vue
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.autoconfigure.condition.ConditionalOnClass; import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty; import org.springframework.boot.context.properties.EnableConfigurationProperties; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration @EnableConfigurationProperties(HelloProperties.class)//开启属性注入,通过@autowired注入 @ConditionalOnClass(Hello.class)//判断这个类是否在classpath中存在 //当设置hello=enabled的情况下,如果没有设置则默认为true,即条件符合 @ConditionalOnProperty(prefix="hello", value="enabled", matchIfMissing = true)//name属性和value属性是互斥的，不能同时使用 public class HelloAutoConfiguration { @Autowired private HelloProperties helloProperties; @Bean//使用java配置方式配置这个类 @ConditionalOnMissingBean(Hello.class)//容器中如果没有Hello这个类,那么自动配置这个Hello public Hello hello() { Hello hello = new Hello(); hello.setMsg(helloProperties.getMsg()); return hello; } }
@SpringBootApplication相当于@Configuration、@EnableAutoConfiguration和 @ComponentScan，你也可以同时使用这3个注解。其中@Configuration、@ComponentScan是spring框架的语法，在spring 3.x就有了，用于代码方式创建配置信息和扫描包。@EnableAutoConfiguration是spring boot语法，表示将使用自动配置。你如果下载了spring boot源码，就会看到spring boot实现了很多starter应用，这些starter就是一些配置信息（有点类似于docker，一组环境一种应用的概念），spring boot看到引入的starter包，就可以计算如果自动配置你的应用。
http://docs.spring.io/spring-boot/docs/1.2.8.RELEASE/reference/htmlsingle/#boot-features-logging-file-output
Spring Boot 支持多种外部配置方式
这些方式优先级如下：
- 命令行参数
- 来自
java:comp/env的JNDI属性 - Java系统属性（
System.getProperties()） - 操作系统环境变量
RandomValuePropertySource配置的random.*属性值jar包外部的application-{profile}.properties或application.yml(带spring.profile)配置文件jar包内部的application-{profile}.properties或application.yml(带spring.profile)配置文件jar包外部的application.properties或application.yml(不带spring.profile)配置文件jar包内部的application.properties或application.yml(不带spring.profile)配置文件@Configuration注解类上的@PropertySource- 通过
SpringApplication.setDefaultProperties指定的默认属性
应用配置文件（.properties或.yml）
在配置文件中直接写：
name=Isea533 server.port=8080.yml格式的配置文件如：
name: Isea533 server: port: 8080当有前缀的情况下，使用.yml格式的配置文件更简单。关于.yml配置文件用法请看这里
注意：使用.yml时，属性名的值和冒号中间必须有空格，如name: Isea533正确，name:Isea533就是错的。
属性配置文件的位置
spring会从classpath下的/config目录或者classpath的根目录查找application.properties或application.yml。
/config优先于classpath根目录
@PropertySource
这个注解可以指定具体的属性配置文件，优先级比较低。
SpringApplication.setDefaultProperties
例如：
SpringApplication application = new SpringApplication(Application.class); Map<String, Object> defaultMap = new HashMap<String, Object>(); defaultMap.put("name", "Isea-Blog"); //还可以是Properties对象 application.setDefaultProperties(defaultMap); application.run(args);http://blog.csdn.net/isea533/article/details/50281151
used an application.properties with Spring Boot (1.3 M1) and started to translate it into a yaml file because it grew more and more complex.
But I have problems translating this into yaml:
logging.level.*=WARN
logging.level.com.filenet.wcm=ERROR
logging.level.de.mycompany=DEBUG
The last two lines are easily translated into this:
logging:
level:
com.filenet.wcm: ERROR
de.mycompany: DEBUG
But how to add the values for the root logging level ? These two approaches failed:
Failed approach 1:
logging:
level: WARN
com.filenet.wcm: ERROR
de.mycompany: DEBUG
Failed approach 2:
logging:
level:
star: WARN
com.filenet.wcm: ERROR
de.mycompany: DEBUG
I read the docs, searched stackoverflow and googled but did not find an example for a valid syntax.
You can use ROOT to configure the root logging level:
logging:
level:
ROOT: DEBUGhttp://stackoverflow.com/questions/3837801/how-to-change-root-logging-level-programmatically
logging configuration in Yaml file #1265
https://github.com/spring-projects/spring-boot/issues/1265
Spring Boot建议将我们main方法所在的这个主要的配置类配置在根包名下。
类似如下结构：
com
+- example
+- myproject
+- Application.java
| +- domain | +- Customer.java | +- CustomerRepository.java | +- service | +- CustomerService.java | +- web +- CustomerController.java在Application.java中有main方法。
启动项目SpringApplication.run
启动Spring Boot项目最简单的方法就是执行下面的方法：
SpringApplication.run(Application.class, args);该方法返回一个ApplicationContext对象，使用注解的时候返回的具体类型是AnnotationConfigApplicationContext或AnnotationConfigEmbeddedWebApplicationContext，当支持web的时候是第二个。
除了上面这种方法外，还可以用下面的方法：
SpringApplication application = new SpringApplication(Application.class); application.run(args);SpringApplication包含了一些其他可以配置的方法，如果你想做一些配置，可以用这种方式。
除了上面这种直接的方法外，还可以使用SpringApplicationBuilder：
new SpringApplicationBuilder() .showBanner(false) .sources(Application.class) .run(args);当使用SpringMVC的时候由于需要使用子容器，就需要用到SpringApplicationBuilder，该类有一个child(xxx...)方法可以添加子容器。
http://blog.csdn.net/isea533/article/details/50278205
本文记录Spring Boot application.propertis配置文件的相关通用属性
# ===================================================================
# COMMON SPRING BOOT PROPERTIES # # This sample file is provided as a guideline. Do NOT copy it in its # entirety to your own application. ^^^ # =================================================================== # ---------------------------------------- # CORE PROPERTIES # ---------------------------------------- # SPRING CONFIG (ConfigFileApplicationListener) spring.config.name= # config file name (default to 'application') spring.config.location= # location of config file # PROFILES spring.profiles= # comma list of active profiles # APPLICATION SETTINGS (SpringApplication) spring.main.sources= spring.main.web-environment= # detect by default spring.main.show-banner=true spring.main....= # see class for all properties # LOGGING logging.path=/var/logs logging.file=myapp.log logging.config= # IDENTITY (ContextIdApplicationContextInitializer) spring.application.name= spring.application.index= # EMBEDDED SERVER CONFIGURATION (ServerProperties) server.port=8080 server.address= # bind to a specific NIC server.session-timeout= # session timeout in seconds server.context-path= # the context path, defaults to '/' server.servlet-path= # the servlet path, defaults to '/' server.tomcat.access-log-pattern= # log pattern of the access log server.tomcat.access-log-enabled=false # is access logging enabled server.tomcat.protocol-header=x-forwarded-proto # ssl forward headers server.tomcat.remote-ip-header=x-forwarded-for server.tomcat.basedir=/tmp # base dir (usually not needed, defaults to tmp) server.tomcat.background-processor-delay=30; # in seconds server.tomcat.max-threads = 0 # number of threads in protocol handler server.tomcat.uri-encoding = UTF-8 # character encoding to use for URL decoding # SPRING MVC (HttpMapperProperties) http.mappers.json-pretty-print=false # pretty print JSON http.mappers.json-sort-keys=false # sort keys spring.mvc.locale= # set fixed locale, e.g. en_UK spring.mvc.date-format= # set fixed date format, e.g. dd/MM/yyyy spring.mvc.message-codes-resolver-format= # PREFIX_ERROR_CODE / POSTFIX_ERROR_CODE spring.view.prefix= # MVC view prefix spring.view.suffix= # ... and suffix spring.resources.cache-period= # cache timeouts in headers sent to browser spring.resources.add-mappings=true # if default mappings should be added # THYMELEAF (ThymeleafAutoConfiguration) spring.thymeleaf.prefix=classpath:/templates/ spring.thymeleaf.suffix=.html spring.thymeleaf.mode=HTML5 spring.thymeleaf.encoding=UTF-8 spring.thymeleaf.content-type=text/html # ;charset=<encoding> is added spring.thymeleaf.cache=true # set to false for hot refresh # FREEMARKER (FreeMarkerAutoConfiguration) spring.freemarker.allowRequestOverride=false spring.freemarker.allowSessionOverride=false spring.freemarker.cache=true spring.freemarker.checkTemplateLocation=true spring.freemarker.contentType=text/html spring.freemarker.exposeRequestAttributes=false spring.freemarker.exposeSessionAttributes=false spring.freemarker.exposeSpringMacroHelpers=false spring.freemarker.prefix= spring.freemarker.requestContextAttribute= spring.freemarker.settings.*= spring.freemarker.suffix=.ftl spring.freemarker.templateEncoding=UTF-8 spring.freemarker.templateLoaderPath=classpath:/templates/ spring.freemarker.viewNames= # whitelist of view names that can be resolved # GROOVY TEMPLATES (GroovyTemplateAutoConfiguration) spring.groovy.template.allowRequestOverride=false spring.groovy.template.allowSessionOverride=false spring.groovy.template.cache=true spring.groovy.template.configuration.*= # See Groovy's TemplateConfiguration spring.groovy.template.contentType=text/html spring.groovy.template.prefix=classpath:/templates/ spring.groovy.template.suffix=.tpl spring.groovy.template.templateEncoding=UTF-8 spring.groovy.template.viewNames= # whitelist of view names that can be resolved # VELOCITY TEMPLATES (VelocityAutoConfiguration) spring.velocity.allowRequestOverride=false spring.velocity.allowSessionOverride=false spring.velocity.cache=true spring.velocity.checkTemplateLocation=true spring.velocity.contentType=text/html spring.velocity.dateToolAttribute= spring.velocity.exposeRequestAttributes=false spring.velocity.exposeSessionAttributes=false spring.velocity.exposeSpringMacroHelpers=false spring.velocity.numberToolAttribute= spring.velocity.prefix= spring.velocity.properties.*= spring.velocity.requestContextAttribute= spring.velocity.resourceLoaderPath=classpath:/templates/ spring.velocity.suffix=.vm spring.velocity.templateEncoding=UTF-8 spring.velocity.viewNames= # whitelist of view names that can be resolved # INTERNATIONALIZATION (MessageSourceAutoConfiguration) spring.messages.basename=messages spring.messages.cacheSeconds=-1 spring.messages.encoding=UTF-8 # SECURITY (SecurityProperties) security.user.name=user # login username security.user.password= # login password security.user.role=USER # role assigned to the user security.require-ssl=false # advanced settings ... security.enable-csrf=false security.basic.enabled=true security.basic.realm=Spring security.basic.path= # /** security.headers.xss=false security.headers.cache=false security.headers.frame=false security.headers.contentType=false security.headers.hsts=all # none / domain / all security.sessions=stateless # always / never / if_required / stateless security.ignored=false # DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties) spring.datasource.name= # name of the data source spring.datasource.initialize=true # populate using data.sql spring.datasource.schema= # a schema (DDL) script resource reference spring.datasource.data= # a data (DML) script resource reference spring.datasource.platform= # the platform to use in the schema resource (schema-${platform}.sql) spring.datasource.continueOnError=false # continue even if can't be initialized spring.datasource.separator=; # statement separator in SQL initialization scripts spring.datasource.driverClassName= # JDBC Settings... spring.datasource.url= spring.datasource.username= spring.datasource.password= spring.datasource.max-active=100 # Advanced configuration... spring.datasource.max-idle=8 spring.datasource.min-idle=8 spring.datasource.initial-size=10 spring.datasource.validation-query= spring.datasource.test-on-borrow=false spring.datasource.test-on-return=false spring.datasource.test-while-idle= spring.datasource.time-between-eviction-runs-millis= spring.datasource.min-evictable-idle-time-millis= spring.datasource.max-wait-millis= # MONGODB (MongoProperties) spring.data.mongodb.host= # the db host spring.data.mongodb.port=27017 # the connection port (defaults to 27107) spring.data.mongodb.uri=mongodb://localhost/test # connection URL spring.data.mongo.repositories.enabled=true # if spring data repository support is enabled # JPA (JpaBaseConfiguration, HibernateJpaAutoConfiguration) spring.jpa.properties.*= # properties to set on the JPA connection spring.jpa.openInView=true spring.jpa.show-sql=true spring.jpa.database-platform= spring.jpa.database= spring.jpa.generate-ddl=false # ignored by Hibernate, might be useful for other vendors spring.jpa.hibernate.naming-strategy= # naming classname spring.jpa.hibernate.ddl-auto= # defaults to create-drop for embedded dbs spring.data.jpa.repositories.enabled=true # if spring data repository support is enabled # SOLR (SolrProperties}) spring.data.solr.host=http://127.0.0.1:8983/solr spring.data.solr.zkHost= spring.data.solr.repositories.enabled=true # if spring data repository support is enabled # ELASTICSEARCH (ElasticsearchProperties}) spring.data.elasticsearch.cluster-name= # The cluster name (defaults to elasticsearch) spring.data.elasticsearch.cluster-nodes= # The address(es) of the server node (comma-separated; if not specified starts a client node) spring.data.elasticsearch.local=true # if local mode should be used with client nodes spring.data.elasticsearch.repositories.enabled=true # if spring data repository support is enabled # FLYWAY (FlywayProperties) flyway.locations=classpath:db/migrations # locations of migrations scripts flyway.schemas= # schemas to update flyway.initVersion= 1 # version to start migration flyway.prefix=V flyway.suffix=.sql flyway.enabled=true flyway.url= # JDBC url if you want Flyway to create its own DataSource flyway.user= # JDBC username if you want Flyway to create its own DataSource flyway.password= # JDBC password if you want Flyway to create its own DataSource # LIQUIBASE (LiquibaseProperties) liquibase.change-log=classpath:/db/changelog/db.changelog-master.yaml liquibase.contexts= # runtime contexts to use liquibase.default-schema= # default database schema to use liquibase.drop-first=false liquibase.enabled=true # JMX spring.jmx.enabled=true # Expose MBeans from Spring # RABBIT (RabbitProperties) spring.rabbitmq.host= # connection host spring.rabbitmq.port= # connection port spring.rabbitmq.addresses= # connection addresses (e.g. myhost:9999,otherhost:1111) spring.rabbitmq.username= # login user spring.rabbitmq.password= # login password spring.rabbitmq.virtualhost= spring.rabbitmq.dynamic= # REDIS (RedisProperties) spring.redis.host=localhost # server host spring.redis.password= # server password spring.redis.port=6379 # connection port spring.redis.pool.max-idle=8 # pool settings ... spring.redis.pool.min-idle=0 spring.redis.pool.max-active=8 spring.redis.pool.max-wait=-1 # ACTIVEMQ (ActiveMQProperties) spring.activemq.broker-url=tcp://localhost:61616 # connection URL spring.activemq.user= spring.activemq.password= spring.activemq.in-memory=true # broker kind to create if no broker-url is specified spring.activemq.pooled=false # HornetQ (HornetQProperties) spring.hornetq.mode= # connection mode (native, embedded) spring.hornetq.host=localhost # hornetQ host (native mode) spring.hornetq.port=5445 # hornetQ port (native mode) spring.hornetq.embedded.enabled=true # if the embedded server is enabled (needs hornetq-jms-server.jar) spring.hornetq.embedded.serverId= # auto-generated id of the embedded server (integer) spring.hornetq.embedded.persistent=false # message persistence spring.hornetq.embedded.data-directory= # location of data content (when persistence is enabled) spring.hornetq.embedded.queues= # comma separate queues to create on startup spring.hornetq.embedded.topics= # comma separate topics to create on startup spring.hornetq.embedded.cluster-password= # customer password (randomly generated by default) # JMS (JmsProperties) spring.jms.pub-sub-domain= # false for queue (default), true for topic # SPRING BATCH (BatchDatabaseInitializer) spring.batch.job.names=job1,job2 spring.batch.job.enabled=true spring.batch.initializer.enabled=true spring.batch.schema= # batch schema to load # AOP spring.aop.auto= spring.aop.proxy-target-class= # FILE ENCODING (FileEncodingApplicationListener) spring.mandatory-file-encoding=false # SPRING SOCIAL (SocialWebAutoConfiguration) spring.social.auto-connection-views=true # Set to true for default connection views or false if you provide your own # SPRING SOCIAL FACEBOOK (FacebookAutoConfiguration) spring.social.facebook.app-id= # your application's Facebook App ID spring.social.facebook.app-secret= # your application's Facebook App Secret # SPRING SOCIAL LINKEDIN (LinkedInAutoConfiguration) spring.social.linkedin.app-id= # your application's LinkedIn App ID spring.social.linkedin.app-secret= # your application's LinkedIn App Secret # SPRING SOCIAL TWITTER (TwitterAutoConfiguration) spring.social.twitter.app-id= # your application's Twitter App ID spring.social.twitter.app-secret= # your application's Twitter App Secret # SPRING MOBILE SITE PREFERENCE (SitePreferenceAutoConfiguration) spring.mobile.sitepreference.enabled=true # enabled by default # SPRING MOBILE DEVICE VIEWS (DeviceDelegatingViewResolverAutoConfiguration) spring.mobile.devicedelegatingviewresolver.enabled=true # disabled by default spring.mobile.devicedelegatingviewresolver.normalPrefix= spring.mobile.devicedelegatingviewresolver.normalSuffix= spring.mobile.devicedelegatingviewresolver.mobilePrefix=mobile/ spring.mobile.devicedelegatingviewresolver.mobileSuffix= spring.mobile.devicedelegatingviewresolver.tabletPrefix=tablet/ spring.mobile.devicedelegatingviewresolver.tabletSuffix=