Spring Boot Druid 数据源配置解析

1、数据源配置属性类源码

package org.springframework.boot.autoconfigure.jdbc;

@ConfigurationProperties(
    prefix = "spring.datasource"
)
public class DataSourceProperties implements BeanClassLoaderAware, InitializingBean {
    private ClassLoader classLoader;
    private String name;
    private boolean generateUniqueName;
    private Class<? extends DataSource> type;
    private String driverClassName;
    private String url;
    private String username;
    private String password;
    private String jndiName;
    private DataSourceInitializationMode initializationMode;
    private String platform;
    private List<String> schema;
    private String schemaUsername;
    private String schemaPassword;
    private List<String> data;
    private String dataUsername;
    private String dataPassword;
    private boolean continueOnError;
    private String separator;
    private Charset sqlScriptEncoding;
    private EmbeddedDatabaseConnection embeddedDatabaseConnection;
    private DataSourceProperties.Xa xa;
    private String uniqueName;
    ......
}

详见Spring Boot 2.1.0文档

2、注解注入数据源类型

@Configuration
public class MyConfig {
    @Bean
    @ConfigurationProperties("spring.datasource")
    public DataSource dataSource() {
  　　　　//对应DataSourceConfiguration类下的几个类型
        //javax.sql.DataSource (Generic)
        //BasicDataSource (Dbcp2)
        //HikariDataSource (Hikari)
        //org.apache.tomcat.jdbc.pool.DataSource (tomcat)
        return DataSourceBuilder.create().type(DataSource.class).build();
    }
}

3、配置

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/springboot?useSSL=false
    username: root
    password: xiaochao
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: org.apache.tomcat.jdbc.pool.DataSource
    initialization-mode: ALWAYS
    schema-username: root
    schema-password: xiaochao
    schema:
      - classpath:schema.sql
    data-username: root
    data-password: xiaochao
#    hikari:
#      username: root
#      password: xiaochao
#      jdbc-url: jdbc:mysql://localhost:3306/springboot?useSSL=false
#      driver-class-name: com.mysql.cj.jdbc.Driver
#      schema:
#        - classpath:schema.sql
server:
  port: 1234

注意：schema.sql 没有生效，待解！！！