Detailed explanation of the configuration file usage of Spring Boot application in JAVA system

backend\src\main\resources\is a configuration file that defines various configuration properties of Spring Boot applications. This file usually contains database connections, server settings, log configurations, security settings, and other application-level configurations.

File path

backend\src\main\resources\

File content

Here is a typical oneExample of file:

server:
  port: 8080
  servlet:
    context-path: /erp

spring:
  application:
    name: mechanical-erp-backend
  datasource:
    url: jdbc:mysql://localhost:3306/mechanical_erp?useSSL=false&serverTimezone=UTC
    username: root
    password: root
    driver-class-name: 
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true
    properties:
      hibernate:
        dialect: .MySQL5InnoDBDialect
        format_sql: true
  security:
    user:
      name: admin
      password: admin123

logging:
  level:
    root: INFO
    : DEBUG

management:
  endpoints:
    web:
      exposure:
        include: "*"

security:
  oauth2:
    resourceserver:
      jwt:
        issuer-uri: /oauth/token

#Other custom configurationscustom:
  app:
    feature-flag:
      new-ui: true
    timeout:
      default: 30s

explain

1. Server configuration

server:
  port: 8080
  servlet:
    context-path: /erp

• port: Specifies the port number for the application to listen on.
• context-path: Specifies the context path of the application.

2. Spring configuration

spring:
  application:
    name: mechanical-erp-backend
  datasource:
    url: jdbc:mysql://localhost:3306/mechanical_erp?useSSL=false&serverTimezone=UTC
    username: root
    password: root
    driver-class-name: 
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true
    properties:
      hibernate:
        dialect: .MySQL5InnoDBDialect
        format_sql: true
  security:
    user:
      name: admin
      password: admin123

• : Specify the name of the application.
• datasource: Database connection configuration, including URL, username, password, and driver class name.
• jpa:
  • -auto: Specifies how Hibernate automatically handles database schemas (e.g.update, create, create-drop）。
  • show-sql: Whether to display SQL statements on the console.
  • : Specify the Hibernate dialect to use.
  • .format_sql: Whether to format SQL statements.
• : The default user security configuration, including username and password.

3. Logging configuration

logging:
  level:
    root: INFO
    : DEBUG

• root: Set the root log level toINFO。
• : Set the log level of a specific package toDEBUG。

4. Management Configuration

management:
  endpoints:
    web:
      exposure:
        include: "*"

• : Expose all management endpoints.

5. Security Configuration

security:
  oauth2:
    resourceserver:
      jwt:
        issuer-uri: /oauth/token

• -uri: Specifies the URI of the JWT issuer.

6. Custom configuration

custom:
  app:
    feature-flag:
      new-ui: true
    timeout:
      default: 30s

• -ui: Customize the function flags and enable the new UI.
• : Customize the default timeout.

Example of usage

Here are some common configuration items and their uses:

Database connection configuration

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/mechanical_erp?useSSL=false&serverTimezone=UTC
    username: root
    password: root
    driver-class-name: 

• url: Database connection URL.
• username: Database username.
• password: Database password.
• driver-class-name: JDBC driver class name.

JPA configuration

spring:
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true
    properties:
      hibernate:
        dialect: .MySQL5InnoDBDialect
        format_sql: true

• ddl-auto: Controls how Hibernate handles database schema.
• show-sql: Whether to display SQL statements on the console.
• dialect: Specify the Hibernate dialect to use.
• format_sql: Whether to format SQL statements.

Log configuration

logging:
  level:
    root: INFO
    : DEBUG

• : Set the root log level.
• : Sets the log level for a specific package.

Manage endpoint configuration

management:
  endpoints:
    web:
      exposure:
        include: "*"

• include: Expose all management endpoints.

Summarize

• (Configuration file):
  • Purpose: Defines various configuration properties of Spring Boot applications.
  • content: Contains server configuration, Spring configuration, log configuration, security configuration, and other application-level configurations.
  • effect: Used to configure the behavior and environment of the application to ensure that the application is up and running correctly.

Make sure that the configuration in this file is correct and meets the overall requirements of the project.

This is the article about the configuration files of Spring Boot application in the JAVA system. For more related Spring Boot configuration files, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!