Dark Horse _13 Spring Boot: 04.spring boot configuration files

13 Spring Boot：

01.spring boot introduce && 02.spring boot entry

04.spring boot configuration files

 

 SpringBoot basis 

---

Four, SpringBoot profile

SpringBoot profile type and role 

SpringBoot is based on the contract, so a lot of configuration have default values, but if you want to use your own configuration, then replace the default configuration, you can use
application.properties  or  application.yml  ( application.yaml ) configuration.

  application.properties

 

Port number #tomcat server 
server.port = 8888 
# Name of the current web application 
server.servlet.context -path =

 

Which, application.properties file is a key file type, and have been using before, so here is not to properties file format to elaborate.
In addition to properties outside the file, SpringBoot may also be used yml file configuration, Hereinafter yml file to explain.

 4.1.2 application.yml profile

  yml Profile Profile

YML file format is YAML (YAML Aint Markup Language) to write the file format, YAML is an intuitive number can be recognized by the computer's according to data serialization format,
and easy to read human beings, and easy interactive scripting language, can be support YAML libraries in different programming languages program guide into,
such as: C / C ++, Ruby, Python, the Java, Perl, C #, PHP and so on. YML files are data-centric than the traditional xml more simple way clean .

YML file extensions can be used .yml or .yaml

 

 

 Configuring normal data
 Syntax: Key: value

 

name: haohao 

Note: value has a space before

Configuration object data

person:
    name: haohao
    age: 31
    addr: beijing
#或者
person: {name: haohao,age: 31,addr: beijing} 

Note: key1 number of spaces is not limited to the foregoing, in yml syntax, the same indentation level represent the same

 

 Configuration array ( List , the Set ) data

Syntax:
Key:
- value1
- value2
or:
Key: [value1, value2]

 

 

City: 
- Beijing 
- Tianjin 
- Shanghai 
- Chongqing 
# or 
City: [Beijing, Tianjin, Shanghai, Chongqing] 

# collection element is an object in the form of 
Student: 
- name: zhangsan 
  Age: 18 is 
  Score: 100 
- name: Lisi 
  Age: 28 
  Score: 88 
- name: wangwu 
  Age: 38 is 
  Score: 90

Note: value1 between the - there is a space between

4.1.3 SpringBoot configuration information inquiries

Mentioned above, SpringBoot configuration file, the main purpose is to modify the configuration information, but in the configuration key query go where
it? We can access SpringBoot official documents

 文档URL：https://docs.spring.io/spring-boot/docs/2.0.1.RELEASE/reference/htmlsingle/#common-applicationproperties

# ----------------------------------------
# WEB PROPERTIES
# ----------------------------------------
# EMBEDDED SERVER CONFIGURATION (ServerProperties)
server.port=8080 # Server HTTP port.
server.servlet.context-path= # Context path of the application.
server.servlet.path=/ # Path of the main dispatcher servlet.
# HTTP encoding (HttpEncodingProperties)
spring.http.encoding.charset=UTF-8 # Charset of HTTP requests and responses. Added to
the "Content-Type" header if not set explicitly.
# JACKSON (JacksonProperties)
spring.jackson.date-format= # Date format string or a fully-qualified date format
class name. For instance, `yyyy-MM-dd HH:mm:ss`.
# SPRING MVC (WebMvcProperties)
spring.mvc.servlet.load-on-startup=-1 # Load on startup priority of the dispatcher servlet.
spring.mvc.static-path-pattern=/** # Path pattern used for static resources.
spring.mvc.view.prefix= # Spring MVC view prefix.
spring.mvc.view.suffix= # Spring MVC view suffix.
# DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties)
spring.datasource.driver-class-name= # Fully qualified name of the JDBC driver. Autodetected based on the URL by default.
spring.datasource.password= # Login password of the database.
spring.datasource.url= # JDBC URL of the database.
spring.datasource.username= # Login username of the database.
# JEST (Elasticsearch HTTP client) (JestProperties)
spring.elasticsearch.jest.password= # Login password.
spring.elasticsearch.jest.proxy.host= # Proxy host the HTTP client should use.
spring.elasticsearch.jest.proxy.port= # Proxy port the HTTP client should use.
spring.elasticsearch.jest.read-timeout=3s # Read timeout.
spring.elasticsearch.jest.username= # Login username.

 

  4.2 Profile configuration attribute mapping class manner 

  4.2.1 Use annotations @Value map
  we can @Value configuration values mapping file annotation to a Spring managed Bean on the field

 

 Controller Layer Entity Bean code is as follows:
 

@Controller
public class QuickStartController {
@Value("${person.name}")
private String name;
@Value("${person.age}")
private Integer age;

    @RequestMapping("/quick")
    @ResponseBody
    public String quick(){
    return "springboot 访问成功! name="+name+",age="+age;
    }
}

 

 4.2.2 Use annotations @ConfigurationProperties map

 By annotation @ConfigurationProperties (prefix = " profile key prefix ") can be arranged in the configuration file is automatically mapped and the entity.

  

        <!-- @ConfigurationProperties的执行器的配置-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

 

 Entity Bean code is as follows:
 

    @Controller
    @ConfigurationProperties(prefix = "person")
    public class QuickStartController {
        private String name;
        private Integer age;
    @RequestMapping("/quick")
    @ResponseBody
    public String quick(){
    return "springboot 访问成功! name="+name+",age="+age;
    }

　　public void setName(String name) {
　　this.name = name;
　　 } 
　　public void setAge(Integer age) {
　　this.age = age;
　　 }
}    

 

 Note: Use @ConfigurationProperties mode can be automatically mapped configuration file and entity fields, but the fields need to be provided set methods can.

 

 

 

 

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