SpringBoot使用一个全局的配置文件,配置文件名是固定的;
•application.properties
•application.yml
配置文件的作用:修改SpringBoot自动配置的默认值;SpringBoot在底层都给我们自动配置好;
YAML(YAML Ain't Markup Language):以数据为中心,比json、xml等更适合做配置文件;以前的配置文件;大多都使用的是xxxx.xml文件;
范例:YAML配置例子
server:
port: 8081
范例:XML配置
语法: K: V:表示一对键值对(: v之间有个空格)
以空格的缩进来控制层级关系;只要是左对齐的一列数据,都是同一个层级的
server:
port: 8081
path: /hello
属性和值也是大小写敏感;
k: v:字面直接来写;
字符串默认不用加上单引号或者双引号;
"":双引号;不会转义字符串里面的特殊字符;特殊字符会作为本身想表示的意思
name: "zhangsan \n lisi":输出;zhangsan 换行 lisi
'':单引号;会转义特殊字符,特殊字符最终只是一个普通的字符串数据
name: ‘zhangsan \n lisi’:输出;zhangsan \n lisi
k: v:在下一行来写对象的属性和值的关系;注意缩进
对象还是k: v的方式
friends:
lastName: zhangsan
age: 20
行内写法:
friends: {lastName: zhangsan,age: 18}
用- 值表示数组中的一个元素
pets:
- cat
- dog
- pig
行内写法
pets: [cat,dog,pig]
application.yml
server:
port: 8081
person:
lastname: zhangsan
age: 18
boss: false
birth: 2020/1/1
maps: {k1: v1,k2: 12}
lists:
- lisi
- zhaoliu
- zhangsan
dog:
name: 狗狗
age: 2
javaBean:
/**
* 将配置文件中配置的每一个属性的值,映射到这个组件中
* @ConfigurationProperties: 告诉SpringBoot将本类中的所有属性和配置文件中相关的配置进行绑定 默认从全局配置文件中获取值
* prefix="person":_配置文件中将下面的所有属性进行一一映射_
*/
@ConfigurationProperties(prefix = "person")
public class Person {
private String lastName;
private Integer age;
private Boolean boss;
private Date birth;
private Map
private List
private Dog dog;
可以导入配置文件处理器,以后编写配置就有提示
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-configuration-processorartifactId>
<version>2.1.6.RELEASEversion>
<optional>trueoptional>
</dependency>
配置文件yml还是properties以上方式都能获取到值;
如何选择以上方式:
如果说,我们只是在某个业务逻辑中需要获取一下配置文件中的某项值,使用@Value;
如果说,我们专门编写了一个javaBean来和配置文件进行映射,我们就直接使用@ConfigurationProperties;
@ConfigurationProperties(prefix = "person")
public class Person {
/**
*
*
*
*/
//lastName必须是邮箱格式
//@Value("${person.last-name}")
private String lastName;
//@Value("#{11*2}")
private Integer age;
//@Value("true")
private Boolean boss;
private Date birth;
private Map
private List
private Dog dog;
@PropertySource:加载指定的配置文件;
/**
* 将配置文件中配置的每一个属性的值,映射到这个组件中
* @ConfigurationProperties: 告诉SpringBoot将本类中的所有属性和配置文件中相关的配置进行绑定 默认从全局配置文件中获取值
* prefix="person":_配置文件中将下面的所有属性进行一一映射_
*/
@PropertySource(value={"classpath:person.properties"})
@ConfigurationProperties(prefix = "person")
//@Validated
public class Person {
/**
*
*
*
*/
// @Value("${person.last-name}")
private String lastName;
// @Value("#{11*2}")
private Integer age;
// @Value("true")
private Boolean boss;
private Date birth;
private Map
private List
private Dog dog;
@ImportResource:导入Spring的配置文件,让配置文件里面的内容生效;
Spring Boot里面没有Spring的配置文件,我们自己编写的配置文件,也不能自动识别;
想让Spring的配置文件生效,加载进来;@ImportResource标注在一个配置类上
@ImportResource(locations = {"classpath:beans.xml"})
导入Spring的配置文件让其生效
不编写Spring的配置文件
xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="helloService" class="com.pluto.springboot.service.HelloService">bean>
</beans>
SpringBoot推荐给容器中添加组件的方式;推荐使用全注解的方式
1)、配置类@Configuration------>Spring配置文件
2)、使用@Bean给容器中添加组件
/**
* @Configuration:指明当前类是一个配置类;就是来替代之前的Spring配置文件
*
* 在配置文件中用
*
*/
public class MyAppConfig {
//将方法的返回值添加到容器中;容器中这个组件默认的id就是方法名
public HelloService helloService02(){
System.out.println("配置类@Bean给容器中添加组件了…");
return new HelloService();
}
}
# idea_配置文件默认为_utf-8
#����__Person��ֵ
person.last-name=张三${random.uuid}
person.age=${random.int}
person.birth=2020/1/1
person.boss=false
person.maps.k1=v1
person.maps.k2=14
person.lists=a,b,c
person.dog.name=${person.last-name}_dog
person.dog.age=15
在主配置文件编写的时候,文件名可以是 application-{profile}.properties/yml
默认使用application.properties的配置;
application.properties
server.port=8081
spring.profiles.active=dev
application-dev.properties
server.port=8083
yml支持多文档块方式
server:
port: 8081
spring:
profiles:
active: prod
---
server:
port: 8083
spring:
profiles: dev
---
server:
port: 8088
spring:
profiles: prod
(1.Program arguments
(2.CMD
java -jar spring-boot-02-config-0.0.1-SNAPSHOT.jar --spring.profiles.active=dev;
(3.虚拟机参数
-Dspring.profiles.active=dev
springboot 启动会扫描以下位置的application.properties或者application.yml文件作为Spring boot的默认配置文件
–file:./config/
–file:./
–classpath:/config/
–classpath:/
优先级由高到底,高优先级的配置会覆盖低优先级的配置;
SpringBoot会从这四个位置全部加载主配置文件;它们成互补配置;
我们还可以通过spring.config.location来改变默认的配置文件位置
项目打包好以后,我们可以使用命令行参数的形式,启动项目的时候来指定配置文件的新位置;指定配置文件和默认加载的这些配置文件共同起作用形成互补配置;
通过packet生成jar包
D:\DevCode\spring-boot-02-config-02\target>java -jar spring-boot-02-config-02-0.0.1-SNAPSHOT.jar --spring.config.location=G:/application.properties
[7].外部配置加载顺序
SpringBoot也可以从以下位置加载配置; 优先级从高到低;高优先级的配置覆盖低优先级的配置,所有的配置会形成互补配置
(1).命令行
多个配置用空格分开; --配置项=值
java -jar spring-boot-02-config-02-0.0.1-SNAPSHOT.jar --server.port=8086 --server.context-path=/hello
(2)..来自java:comp/env的JNDI属性
(3),Java系统属性(System.getProperties())
(4).操作系统环境变量
(5).RandomValuePropertySource配置的random.*属性值
由jar包外向jar包内进行寻找
优先加载带profile
(6).jar包外部的application-{profile}.properties或application.yml(带spring.profile)配置文件
(7).jar包内部的application-{profile}.properties或application.yml(带spring.profile)配置文件
加载不带profile
(8).jar包外部的application.properties或application.yml(不带spring.profile)配置文件
(9).jar包内部的application.properties或application.yml(不带spring.profile)配置文件
(10).@Configuration注解类上的@PropertySource
(11).通过SpringApplication.setDefaultProperties指定的默认属性
所有支持的配置加载来源:参考官方文档
配置文件到底能写什么?怎么写?自动配置原理;
利用AutoConfigurationImportSelector给容器中导入一些组件
查看selectImports()方法的内容
获取候选的配置
return StringUtils.toStringArray(autoConfigurationEntry.getConfigurations());
SpringFactoriesLoader.loadFactoryNames()
扫描所有jar包类路径下 META-INF/spring.factories
把扫描到的这些文件的内容包装成properties对象
从properties中获取到EnableAutoConfiguration.class类(类名)对应的值,然后把他们添加在容器中
将类路径下 META-INF/spring.factories 里面配置的所有EnableAutoConfiguration的值加入到了容器中;
# Auto Configure
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
org.springframework.boot.autoconfigure.admin.SpringApplicationAdminJmxAutoConfiguration,\
org.springframework.boot.autoconfigure.aop.AopAutoConfiguration,\
org.springframework.boot.autoconfigure.amqp.RabbitAutoConfiguration,\
org.springframework.boot.autoconfigure.batch.BatchAutoConfiguration,\
org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration,\
org.springframework.boot.autoconfigure.cassandra.CassandraAutoConfiguration,\
org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration,\
org.springframework.boot.autoconfigure.context.LifecycleAutoConfiguration,\
org.springframework.boot.autoconfigure.context.MessageSourceAutoConfiguration,\
org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration,\
org.springframework.boot.autoconfigure.couchbase.CouchbaseAutoConfiguration,\
org.springframework.boot.autoconfigure.dao.PersistenceExceptionTranslationAutoConfiguration,\
org.springframework.boot.autoconfigure.data.cassandra.CassandraDataAutoConfiguration,\
org.springframework.boot.autoconfigure.data.cassandra.CassandraReactiveDataAutoConfiguration,\
org.springframework.boot.autoconfigure.data.cassandra.CassandraReactiveRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.cassandra.CassandraRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.couchbase.CouchbaseDataAutoConfiguration,\
org.springframework.boot.autoconfigure.data.couchbase.CouchbaseReactiveDataAutoConfiguration,\
org.springframework.boot.autoconfigure.data.couchbase.CouchbaseReactiveRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.couchbase.CouchbaseRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchDataAutoConfiguration,\
org.springframework.boot.autoconfigure.data.elasticsearch.ElasticsearchRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.elasticsearch.ReactiveElasticsearchRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.elasticsearch.ReactiveElasticsearchRestClientAutoConfiguration,\
org.springframework.boot.autoconfigure.data.jdbc.JdbcRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.ldap.LdapRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration,\
org.springframework.boot.autoconfigure.data.mongo.MongoReactiveDataAutoConfiguration,\
org.springframework.boot.autoconfigure.data.mongo.MongoReactiveRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.mongo.MongoRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.neo4j.Neo4jDataAutoConfiguration,\
org.springframework.boot.autoconfigure.data.neo4j.Neo4jRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.solr.SolrRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.r2dbc.R2dbcDataAutoConfiguration,\
org.springframework.boot.autoconfigure.data.r2dbc.R2dbcRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.r2dbc.R2dbcTransactionManagerAutoConfiguration,\
org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration,\
org.springframework.boot.autoconfigure.data.redis.RedisReactiveAutoConfiguration,\
org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration,\
org.springframework.boot.autoconfigure.data.rest.RepositoryRestMvcAutoConfiguration,\
org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration,\
org.springframework.boot.autoconfigure.elasticsearch.ElasticsearchRestClientAutoConfiguration,\
org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration,\
org.springframework.boot.autoconfigure.freemarker.FreeMarkerAutoConfiguration,\
org.springframework.boot.autoconfigure.groovy.template.GroovyTemplateAutoConfiguration,\
org.springframework.boot.autoconfigure.gson.GsonAutoConfiguration,\
org.springframework.boot.autoconfigure.h2.H2ConsoleAutoConfiguration,\
org.springframework.boot.autoconfigure.hateoas.HypermediaAutoConfiguration,\
org.springframework.boot.autoconfigure.hazelcast.HazelcastAutoConfiguration,\
org.springframework.boot.autoconfigure.hazelcast.HazelcastJpaDependencyAutoConfiguration,\
org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration,\
org.springframework.boot.autoconfigure.http.codec.CodecsAutoConfiguration,\
org.springframework.boot.autoconfigure.influx.InfluxDbAutoConfiguration,\
org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration,\
org.springframework.boot.autoconfigure.integration.IntegrationAutoConfiguration,\
org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,\
org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,\
org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration,\
org.springframework.boot.autoconfigure.jdbc.JndiDataSourceAutoConfiguration,\
org.springframework.boot.autoconfigure.jdbc.XADataSourceAutoConfiguration,\
org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,\
org.springframework.boot.autoconfigure.jms.JmsAutoConfiguration,\
org.springframework.boot.autoconfigure.jmx.JmxAutoConfiguration,\
org.springframework.boot.autoconfigure.jms.JndiConnectionFactoryAutoConfiguration,\
org.springframework.boot.autoconfigure.jms.activemq.ActiveMQAutoConfiguration,\
org.springframework.boot.autoconfigure.jms.artemis.ArtemisAutoConfiguration,\
org.springframework.boot.autoconfigure.jersey.JerseyAutoConfiguration,\
org.springframework.boot.autoconfigure.jooq.JooqAutoConfiguration,\
org.springframework.boot.autoconfigure.jsonb.JsonbAutoConfiguration,\
org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration,\
org.springframework.boot.autoconfigure.availability.ApplicationAvailabilityAutoConfiguration,\
org.springframework.boot.autoconfigure.ldap.embedded.EmbeddedLdapAutoConfiguration,\
org.springframework.boot.autoconfigure.ldap.LdapAutoConfiguration,\
org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration,\
org.springframework.boot.autoconfigure.mail.MailSenderAutoConfiguration,\
org.springframework.boot.autoconfigure.mail.MailSenderValidatorAutoConfiguration,\
org.springframework.boot.autoconfigure.mongo.embedded.EmbeddedMongoAutoConfiguration,\
org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration,\
org.springframework.boot.autoconfigure.mongo.MongoReactiveAutoConfiguration,\
org.springframework.boot.autoconfigure.mustache.MustacheAutoConfiguration,\
org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration,\
org.springframework.boot.autoconfigure.quartz.QuartzAutoConfiguration,\
org.springframework.boot.autoconfigure.r2dbc.R2dbcAutoConfiguration,\
org.springframework.boot.autoconfigure.rsocket.RSocketMessagingAutoConfiguration,\
org.springframework.boot.autoconfigure.rsocket.RSocketRequesterAutoConfiguration,\
org.springframework.boot.autoconfigure.rsocket.RSocketServerAutoConfiguration,\
org.springframework.boot.autoconfigure.rsocket.RSocketStrategiesAutoConfiguration,\
org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration,\
org.springframework.boot.autoconfigure.security.servlet.UserDetailsServiceAutoConfiguration,\
org.springframework.boot.autoconfigure.security.servlet.SecurityFilterAutoConfiguration,\
org.springframework.boot.autoconfigure.security.reactive.ReactiveSecurityAutoConfiguration,\
org.springframework.boot.autoconfigure.security.reactive.ReactiveUserDetailsServiceAutoConfiguration,\
org.springframework.boot.autoconfigure.security.rsocket.RSocketSecurityAutoConfiguration,\
org.springframework.boot.autoconfigure.security.saml2.Saml2RelyingPartyAutoConfiguration,\
org.springframework.boot.autoconfigure.sendgrid.SendGridAutoConfiguration,\
org.springframework.boot.autoconfigure.session.SessionAutoConfiguration,\
org.springframework.boot.autoconfigure.security.oauth2.client.servlet.OAuth2ClientAutoConfiguration,\
org.springframework.boot.autoconfigure.security.oauth2.client.reactive.ReactiveOAuth2ClientAutoConfiguration,\
org.springframework.boot.autoconfigure.security.oauth2.resource.servlet.OAuth2ResourceServerAutoConfiguration,\
org.springframework.boot.autoconfigure.security.oauth2.resource.reactive.ReactiveOAuth2ResourceServerAutoConfiguration,\
org.springframework.boot.autoconfigure.solr.SolrAutoConfiguration,\
org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration,\
org.springframework.boot.autoconfigure.task.TaskSchedulingAutoConfiguration,\
org.springframework.boot.autoconfigure.thymeleaf.ThymeleafAutoConfiguration,\
org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration,\
org.springframework.boot.autoconfigure.transaction.jta.JtaAutoConfiguration,\
org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration,\
org.springframework.boot.autoconfigure.web.client.RestTemplateAutoConfiguration,\
org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration,\
org.springframework.boot.autoconfigure.web.reactive.HttpHandlerAutoConfiguration,\
org.springframework.boot.autoconfigure.web.reactive.ReactiveWebServerFactoryAutoConfiguration,\
org.springframework.boot.autoconfigure.web.reactive.WebFluxAutoConfiguration,\
org.springframework.boot.autoconfigure.web.reactive.error.ErrorWebFluxAutoConfiguration,\
org.springframework.boot.autoconfigure.web.reactive.function.client.ClientHttpConnectorAutoConfiguration,\
org.springframework.boot.autoconfigure.web.reactive.function.client.WebClientAutoConfiguration,\
org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration,\
org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration,\
org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration,\
org.springframework.boot.autoconfigure.web.servlet.HttpEncodingAutoConfiguration,\
org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration,\
org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration,\
org.springframework.boot.autoconfigure.websocket.reactive.WebSocketReactiveAutoConfiguration,\
org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration,\
org.springframework.boot.autoconfigure.websocket.servlet.WebSocketMessagingAutoConfiguration,\
org.springframework.boot.autoconfigure.webservices.WebServicesAutoConfiguration,\
org.springframework.boot.autoconfigure.webservices.client.WebServiceTemplateAutoConfiguration
每个这样的 xxxAutoConfiguration类都是容器中的一个组件,都加入到容器中;用他们来做自动配置;
3).每一个自动配置类进行自动配置功能
4).以HttpEncodingAutoConfiguration(Http编码自动配置)为例解释自动配置原理
@Configuration //表示这是一个配置类,以前编写的配置文件一样,也可以给容器中添加组件
@EnableConfigurationProperties(HttpEncodingProperties.class) //启动指定类的ConfigurationProperties功能;将配置文件中对应的值和HttpEncodingProperties绑定起来;并把HttpEncodingProperties加入到ioc容器中
@ConditionalOnWebApplication //Spring底层@Conditional注解(Spring注解版),根据不同的条件,如果满足指定的条件,整个配置类里面的配置就会生效; 判断当前应用是否是web应用,如果是,当前配置类生效
@ConditionalOnClass(CharacterEncodingFilter.class) //判断当前项目有没有这个类CharacterEncodingFilter;SpringMVC中进行乱码解决的过滤器;
@ConditionalOnProperty(prefix = "spring.http.encoding", value = "enabled", matchIfMissing = true) //判断配置文件中是否存在某个配置 spring.http.encoding.enabled;如果不存在,判断也是成立的
//即使我们配置文件中不配置pring.http.encoding.enabled=true,也是默认生效的;
public class HttpEncodingAutoConfiguration {
//他已经和SpringBoot的配置文件映射了
private final HttpEncodingProperties properties;
//只有一个有参构造器的情况下,参数的值就会从容器中拿
public HttpEncodingAutoConfiguration(HttpEncodingProperties properties) {
this.properties = properties;
}
@Bean //给容器中添加一个组件,这个组件的某些值需要从properties中获取
@ConditionalOnMissingBean(CharacterEncodingFilter.class) //判断容器没有这个组件?
public CharacterEncodingFilter characterEncodingFilter() {
CharacterEncodingFilter filter = new OrderedCharacterEncodingFilter();
filter.setEncoding(this.properties.getCharset().name());
filter.setForceRequestEncoding(this.properties.shouldForce(Type.REQUEST));
filter.setForceResponseEncoding(this.properties.shouldForce(Type.RESPONSE));
return filter;
}
根据当前不同的条件判断,决定这个配置类是否生效?
一但这个配置类生效;这个配置类就会给容器中添加各种组件;这些组件的属性是从对应的properties类中获取的,这些类里面的每一个属性又是和配置文件绑定的;
5).所有在配置文件中能配置的属性都是在xxxxProperties类中封装者‘;配置文件能配置什么就可以参照某个功能对应的这个属性类
@ConfigurationProperties(prefix = "spring.http.encoding") //从配置文件中获取指定的值和bean的属性进行绑定
public class HttpEncodingProperties {
public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
springboot精髓:
1)、SpringBoot启动会加载大量的自动配置类
2)、我们看我们需要的功能有没有SpringBoot默认写好的自动配置类;
3)、我们再来看这个自动配置类中到底配置了哪些组件;(只要我们要用的组件有,我们就不需要再来配置了)
4)、给容器中自动配置类添加组件的时候,会从properties类中获取某些属性。我们就可以在配置文件中指定这些属性的值;
xxxxAutoConfigurartion:自动配置类;
给容器中添加组件
xxxxProperties:封装配置文件中相关属性;
(2).细节
1).@Conditional派生注解(Spring注解版原生的@Conditional作用)
作用:必须是@Conditional指定的条件成立,才给容器中添加组件,配置配里面的所有内容才生效;
@Conditional扩展注解
作用(判断是否满足当前指定条件)
系统的java版本是否符合要求
容器中存在指定Bean;
容器中不存在指定Bean;
满足SpEL表达式指定
系统中有指定的类
系统中没有指定的类
容器中只有一个指定的Bean,或者这个Bean是首选Bean
系统中指定的属性是否有指定的值
类路径下是否存在指定资源文件
当前是web环境
@ConditionalOnNotWebApplication
当前不是web环境
JNDI存在指定项
自动配置类必须在一定的条件下才能生效;
我们怎么知道哪些自动配置类生效;
我们可以通过启用 debug=true属性;来让控制台打印自动配置报告,这样我们就可以很方便的知道哪些自动配置类生效;
============================
CONDITIONS EVALUATION REPORT
============================
Positive matches: 启用的自动配置类
-----------------
AopAutoConfiguration matched:
- @ConditionalOnProperty (spring.aop.auto=true) matched (OnPropertyCondition)
AopAutoConfiguration.ClassProxyingConfiguration matched:
- @ConditionalOnMissingClass did not find unwanted class 'org.aspectj.weaver.Advice' (OnClassCondition)
- @ConditionalOnProperty (spring.aop.proxy-target-class=true) matched (OnPropertyCondition)
Negative matches:
没启用的自动配置类
-----------------
ActiveMQAutoConfiguration:
Did not match:
- @ConditionalOnClass did not find required class 'javax.jms.ConnectionFactory' (OnClassCondition)
参考文档:https://bitbucket.org/asomov/snakeyaml/wiki/Documentation#markdown-header-yaml-syntax
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