search
HomeJavajavaTutorialHow are configuration properties bound in Spring Boot?

Configuration properties in Spring Boot can be bound to configuration property classes from property sources, including application properties files, environment variables, and command line parameters. Property binding is done through the @ConfigurationProperties annotation. Practical case: Create a configuration attribute class, bind the attribute source, and obtain the configuration attribute.

Spring Boot 中的配置属性是如何绑定的?

Binding of configuration properties in Spring Boot

Spring Boot provides a powerful configuration property mechanism, which allows us to Easily bind configuration values ​​to our applications from various sources such as application properties files, environment variables, and command line arguments.

Creation of configuration attribute class

First, we need to create a configuration attribute class to declare the fields and types of the configuration attribute. For example, the following class defines two configuration properties:

@ConfigurationProperties("my.app")
public class AppConfig {
    private String name;
    private int port;

    // getter and setter methods
}

Property Sources

In Spring Boot, configuration properties can be bound from various property sources. The most common property sources include:

  • Application properties file: Located in src/main/resources/application.properties, contains key-value pairs.
  • Environment variables: System environment variables, named in the format of MY_APP_NAME etc.
  • Command line parameters: Pass to the application in the format of --my.app.name=value etc.

Property binding

Spring Boot automatically binds configuration properties from the property source to the configuration property class. This binding is done through the @ConfigurationProperties annotation.

Practical Case

The following is a practical case showing how to use configuration properties in a Spring Boot application:

@SpringBootApplication
public class MyApp {
    public static void main(String[] args) {
        SpringApplication.run(MyApp.class, args);
        AppConfig config = beanFactory.getBean(AppConfig.class);

        System.out.println("Name: " + config.getName());
        System.out.println("Port: " + config.getPort());
    }
}

In this example , we create a AppConfig class and declare it as a configuration property class using the @ConfigurationProperties annotation. Then, we use beanFactory to get the AppConfig bean and print the configured property values.

Run this application and provide the application.properties file:

my.app.name=My Application
my.app.port=8080

You should see the output in the console:

Name: My Application
Port: 8080

The above is the detailed content of How are configuration properties bound in Spring Boot?. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
修改文件扩展名为.INI修改文件扩展名为.INIFeb 18, 2024 am 10:36 AM

如何更改文件类型为ini随着计算机的普及和应用软件的多样化,我们经常会遇到需要更改文件类型的情况。其中,将文件类型更改为.ini文件是一种常见的操作。本文将介绍如何简单快捷地将文件类型更改为.ini。首先,我们需要明确.ini文件的特点和用途。.ini文件是一种用于存储配置信息的文本文件。它通常以.ini作为扩展名,并包含键值对的形式。通过修改.ini文件中

当关系的一侧已存在于数据库中时,使用 SQLModel 插入多对多关系对象当关系的一侧已存在于数据库中时,使用 SQLModel 插入多对多关系对象Feb 06, 2024 am 08:00 AM

我正在尝试使用sqlmodel在数据库中插入记录,其中数据如下所示。一个house对象,它有颜色和许多位置。地点也将与许多房屋相关联。输入为:[{"color":"red","locations":[{"type":"country","name":"netherlands"},{"type":"municipality","name":"amsterdam"},

在golang中获取JSON格式的x-www-form-urlencoded请求的嵌套键值对在golang中获取JSON格式的x-www-form-urlencoded请求的嵌套键值对Feb 09, 2024 pm 03:15 PM

我有一个用例,我们在x-www-form-urlencoded主体中获取嵌套键值,如下所示name=abc&age=12¬es[key1]=value1¬es[key2]=value2我尝试了url.parsequery("name=abc&age=12¬es\[key1\]=value1¬es\[key2\]=value2")但它给出了{"name":"abc","age":12,"notes[key1]":"value1","note

GO 中将 Map 转换为 List 的通用函数GO 中将 Map 转换为 List 的通用函数Feb 13, 2024 pm 08:30 PM

如何在go中编写一个函数,将任何map转换为对象列表(删除键)?例如:funcmaptolist(inputmapmap[any]any)any{varresultlist[]anyfor_,obj:=rangeinputmap{resultlist=append(resultlist,obj)}returnresultlist}funcmain(){mymap:=make(ma

php数组键值对是什么php数组键值对是什么Aug 03, 2023 pm 02:20 PM

php数组键值对是一种数据结构,由一个键和一个相应的值组成,键是数组元素的标识符,而值是与键相关联的数据。允许我们以键为标识来存储和访问数据,通过使用键值对,可以更方便地操作和管理数组中的元素,使得程序开发更加灵活和高效。

在Java中使用枚举类型来赋值的方法在Java中使用枚举类型来赋值的方法Jan 31, 2024 pm 06:33 PM

什么是枚举类型?枚举类型(enum)是Java编程语言中的一种特殊数据类型,用于表示一组预定义的常量。枚举类型中的每个常量都代表该类型的一个可能值。如何使用枚举类型设置值?要使用枚举类型设置值,可以使用枚举类型的常量。枚举类型的常量可以通过点运算符(.)访问。例如,如果有一个名为Color的枚举类型,其中包含三个常量:RED、GREEN和BLUE

Python底层技术揭秘:如何实现哈希表Python底层技术揭秘:如何实现哈希表Nov 08, 2023 am 11:53 AM

Python底层技术揭秘:如何实现哈希表哈希表是在计算机领域中十分常见且重要的数据结构,它可以高效地存储和查找大量的键值对。在Python中,我们可以使用字典来使用哈希表,但是很少有人深入了解它的实现细节。本文将揭秘Python中哈希表的底层实现技术,并给出具体的代码示例。哈希表的核心思想是将键通过哈希函数映射到一个固定大小的数组中,而不是简单地按顺序存储。

Redis键值对操作在Java开发中的应用:如何快速存取数据Redis键值对操作在Java开发中的应用:如何快速存取数据Aug 01, 2023 am 09:36 AM

Redis键值对操作在Java开发中的应用:如何快速存取数据在Java开发中,数据的存取操作是一项非常重要的任务。如何快速、高效地存取数据是开发者所关注的一个重点问题。而Redis作为一种高性能的内存数据库,具备快速读写操作的特点,因此在Java开发中被广泛应用于数据缓存和存储实现。Redis是一个支持键值对存取的内存数据库。它将数据存储在内存中,因此数据的

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools