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Spring Boot + Spring JDBC で MySQL に接続するための設定

Last updated at 2019-08-31Posted at 2019-08-29

概要

Spring Boot + Spring JDBC (JdbcTemplate など) で MySQL に接続するための設定方法をまとめる

pom.xml

JDBC ドライバである MySQL Connector/J を利用するため、Maven の設定ファイル pom.xml の dependencies に以下を追加する。

pom.xml

<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>8.0.17</version>
  <scope>runtime</scope>
</dependency>

また、 Spring JDBC を導入するため以下も追加する。

pom.xml

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>

application.properties

Spring Boot の設定ファイル application.properties に以下のような設定が必要。

application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/testdb
spring.datasource.username=java
spring.datasource.password=cafebabe
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.initialization-mode=always
spring.datasource.schema=classpath:database/schema.sql
spring.datasource.data=classpath:database/data.sql
spring.datasource.sql-script-encoding=utf-8

spring.datasource.url

MySQL の接続 URL。

MySQL :: MySQL Connector/J 8.0 Developer Guide :: 6.2 Connection URL Syntax

protocol//[hosts][/database][?properties]

spring.datasource.username

MySQL にアクセスするためのユーザー名。

spring.datasource.password

MySQL にアクセスするユーザーのパスワード。

spring.datasource.driver-class-name

JDBC ドライバのクラス名 com.mysql.cj.jdbc.Driver を指定する。

MySQL :: MySQL Connector/J 8.0 Developer Guide :: 6.1 Driver/Datasource Class Name

The name of the class that implements java.sql.Driver in MySQL Connector/J is com.mysql.cj.jdbc.Driver.

spring.datasource.initialization-mode

Database schema initialization mode. SQL 文を書いたスクリプトを実行する場合は always を指定する。

Spring Boot Reference Guide 2.1.7.RELEASE - Appendix A. Common application properties

spring.datasource.initialization-mode=embedded # Initialize the datasource with available DDL and DML scripts.

spring.datasource.schema

Spring Boot 起動時に実行したい SQL 文を記述したファイルのパスを指定する。
DDL (Data Definition Language: データ定義言語) テーブル作成などの実行用。

application.properties

spring.datasource.schema=classpath:database/schema.sql

“How-to” Guides - 10. Database Initialization

Spring Boot can automatically create the schema (DDL scripts) of your DataSource and initialize it (DML scripts). It loads SQL from the standard root classpath locations: schema.sql and data.sql, respectively. In addition, Spring Boot processes the schema-${platform}.sql and data-${platform}.sql files (if present), where platform is the value of spring.datasource.platform. This allows you to switch to database-specific scripts if necessary. For example, you might choose to set it to the vendor name of the database (hsqldb, h2, oracle, mysql, postgresql, and so on).

spring.datasource.data

Spring Boot 起動時に実行したい SQL 文を記述したファイルのパスを指定する。
DML (Data Manipulation Language: データ操作言語) レコード追加などの実行用。

application.properties

spring.datasource.data=classpath:database/data.sql

spring.datasource.sql-script-encoding

SQL 文を書いたファイルの文字エンコーディングを指定する。

application.properties の資料

Spring Boot Reference Guide 2.1.7.RELEASE - Appendix A. Common application properties

application.properties

# DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties)
spring.datasource.continue-on-error=false # Whether to stop if an error occurs while initializing the database.
spring.datasource.data= # Data (DML) script resource references.
spring.datasource.data-username= # Username of the database to execute DML scripts (if different).
spring.datasource.data-password= # Password of the database to execute DML scripts (if different).
spring.datasource.dbcp2.*= # Commons DBCP2 specific settings
spring.datasource.driver-class-name= # Fully qualified name of the JDBC driver. Auto-detected based on the URL by default.
spring.datasource.generate-unique-name=false # Whether to generate a random datasource name.
spring.datasource.hikari.*= # Hikari specific settings
spring.datasource.initialization-mode=embedded # Initialize the datasource with available DDL and DML scripts.
spring.datasource.jmx-enabled=false # Whether to enable JMX support (if provided by the underlying pool).
spring.datasource.jndi-name= # JNDI location of the datasource. Class, url, username & password are ignored when set.
spring.datasource.name= # Name of the datasource. Default to "testdb" when using an embedded database.
spring.datasource.password= # Login password of the database.
spring.datasource.platform=all # Platform to use in the DDL or DML scripts (such as schema-${platform}.sql or data-${platform}.sql).
spring.datasource.schema= # Schema (DDL) script resource references.
spring.datasource.schema-username= # Username of the database to execute DDL scripts (if different).
spring.datasource.schema-password= # Password of the database to execute DDL scripts (if different).
spring.datasource.separator=; # Statement separator in SQL initialization scripts.
spring.datasource.sql-script-encoding= # SQL scripts encoding.
spring.datasource.tomcat.*= # Tomcat datasource specific settings
spring.datasource.type= # Fully qualified name of the connection pool implementation to use. By default, it is auto-detected from the classpath.
spring.datasource.url= # JDBC URL of the database.
spring.datasource.username= # Login username of the database.
spring.datasource.xa.data-source-class-name= # XA datasource fully qualified name.
spring.datasource.xa.properties= # Properties to pass to the XA data source.

参考資料

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