Shulou(Shulou.com)06/03 Report--

Method 1:

@ Configuration

/ / @ PropertySource ("classpath:jdbc.properties")

/ / @ PropertySource ("classpath:config/jdbc222222.properties")

@ PropertySources ({@ PropertySource ("classpath:jdbc.properties"), @ PropertySource ("classpath:config/jdbc222222.properties")})

Public class FileConfig {

}

@ Component

Public class Dbconfig {

@ Value ("${db.url}")

Private String dbUrl

@ Value ("${db.port}")

Private Integer dbPort

@ Value ("${db.password}")

Private String dbPassword

@ Value ("${db.username}")

Private String dbUserName

Public void show () {

System.out.println ("> parameters obtained in Dbconfigz")

System.out.println ("dbUrl=" + dbUrl)

System.out.println ("dbPort" + "=" + dbPort)

System.out.println ("dbPassword" + "=" + dbPassword)

System.out.println ("dbUserName" + "=" + dbUserName)

}

}

Information about the configuration file, whose name is jdbc.properties. The path is under resources

Db.password=root

Db.username=root

Data.url=127.0.0.12

Data.port=12343

Data.name=1233

Data.password=root3

The main way to test is:

Public static void main (String [] args) {

ConfigurableApplicationContext context = SpringApplication.run (App.class, args)

Context.getBean (Runnable.class) .run ()

/ / String property = context.getEnvironment () .getProperty ("local.ip")

/ / System.out.println ("the parameter obtained is:" + property)

/ context.getBean (UserConfig.class) .show ()

Context.getBean (Dbconfig.class) .show ()

Context.getBean (DataSourceProperties.class) .show ()

Context.close ()

}

Method 2: obtain external configuration information through environment

@ Component

Public class UserConfig {

@ Autowired

Environment environment

@ Value ("${local.port}")

Private String localPort

@ Value ("${local.port}")

Private Integer localPort2

@ Value ("${tomcat.port:9090}")

Private String tomcatPort

Public void show () {

System.out.println ("value of local.ip in application.properties:" + environment.getProperty ("local.ip"))

System.out.println ("value of local.port in application.properties:" + environment.getProperty ("local.port"))

System.out.println ("value of local.port in application.properties:" + environment.getProperty ("local.port", Integer.class))

System.out.println ("value of name in application.properties:" + environment.getProperty ("name"))

System.out.println ("value of app.name in application.properties:" + environment.getProperty ("app.name"))

System.out.println ("value of tomcat.port in application.properties:" + environment.getProperty ("tomcat.port"))

System.out.println ("value of tomcat.port in application.properties:" + tomcatPort)

}

}

Method 3:

@ Component

@ ConfigurationProperties (prefix= "data")

Public class DataSourceProperties {

Private String url

Private String port

Private String name

Private String password

Public String getUrl () {

Return url

}

Public void setUrl (String url) {

This.url = url

}

Public String getPort () {

Return port

}

Public void setPort (String port) {

This.port = port

}

Public String getName () {

Return name

}

Public void setName (String name) {

This.name = name

}

Public String getPassword () {

Return password

}

Public void setPassword (String password) {

This.password = password

}

Public void show () {

System.out.println ("> url" + url)

System.out.println ("> port" + port)

System.out.println ("> name" + name)

System.out.println ("> password" + password)

}

}

General description:

* two methods to obtain the information in the configuration information

* the file name of the configuration file is application.properties

* the default location is in the classpath root directory or classpath:/config file:/ file:config/

*

* the default configuration file name can be specified using-- spring.config.name. You only need to specify the name of the file, and the file extension can be omitted.

* the default profile path can be specified using-- spring.config.location

* configuration files need to specify the full path, including directories and file names, and you can specify multiple ones, separated by commas

*-- spring.config.location=classpath:config/app.properties (if it is a file, file: the path to the file)

*

Spring boot supports the configuration of arrays and collections

Package com.zcp.springstart

Import java.util.ArrayList

Import java.util.Arrays

Import java.util.List

Import org.springframework.boot.context.properties.ConfigurationProperties

Import org.springframework.stereotype.Component

/ * *

* support getting arrays and collections

* configuration method: name [index] = value

* how to write it in application.properties file:

* data.url=127.0.0.1

Data.port=1234

Data.name=123

Data.password=root.post

Ds.hosts [0] = 128.128.128.0

Ds.hosts [1] = 128.128.128.1

Ds.hosts [2] = 128.128.128.2

Ds.hosts [3] = 128.128.128.3

Ds.ports [0] = 8888

Ds.ports [1] = 8889

Ds.ports [2] = 8890

Ds.ports [3] = 8891

Ds.ports [4] = 8892

*

Title: TomcatProperties

*

Description:

*

Company: www.itcast.cn

* @ version 1.0

, /

@ Component

@ ConfigurationProperties ("ds")

Public class TomcatProperties {

Private List hosts = new ArrayList ()

Private String [] ports

Public String [] getPorts () {

Return ports

}

Public void setPorts (String [] ports) {

This.ports = ports

}

Public List getHosts () {

Return hosts

}

Public void setHosts (List hosts) {

This.hosts = hosts

}

@ Override

Public String toString () {

Return "TomcatProperties [hosts=" + hosts + ", ports=" + Arrays.toString (ports) + "]"

}

}

Enter the configuration information in the application.properties file below:

Data.url=127.0.0.1

Data.port=1234

Data.name=123

Data.password=root.post

Ds.hosts [0] = 128.128.128.0

Ds.hosts [1] = 128.128.128.1

Ds.hosts [2] = 128.128.128.2

Ds.hosts [3] = 128.128.128.3

Ds.ports [0] = 8888

Ds.ports [1] = 8889

Ds.ports [2] = 8890

Ds.ports [3] = 8891

Ds.ports [4] = 8892

The main way to test is:

Public static void main (String [] args) {

ConfigurableApplicationContext context = SpringApplication.run (App.class, args)

Context.getBean (Runnable.class) .run ()

/ / String property = context.getEnvironment () .getProperty ("local.ip")

/ / System.out.println ("the parameter obtained is:" + property)

/ context.getBean (UserConfig.class) .show ()

/ context.getBean (Dbconfig.class) .show ()

/ context.getBean (DataSourceProperties.class) .show ()

System.out.println (context.getBean (TomcatProperties.class))

Context.close ()

}

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.