Springboot连接Druid数据源

如果我们在设置完数据源配置文件后，不去主动设置数据源类型，那么springboot默认会给我们提供一个封装好的数据源叫com.zaxxer.hikari.HikariDataSource数据源，这个数据源跟高级。 

一、导入依赖

    com.alibaba
    druid
    1.1.21

 二、配置文件

# 配置数据库
spring:
  datasource:
    url: jdbc:mysql://localhost:3306/student_info
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource  #自定义数据源类型

    #数据库连接池配置
    druid:
      initialSize: 5
      minIdle: 5
      maxActive: 20
      maxWait: 60000
      timeBetweenEvictionRunsMillis: 60000
      minEvictableIdleTimeMillis: 300000
      validationQuery: SELECt 1 FROM DUAL
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      poolPreparedStatements: true
      filters: stat,wall,log4j
      maxPoolPreparedStatementPerConnectionSize: 20
      useGlobalDataSourceStat: true
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

三、向spring容器里面加入这个封装好的数据源 

@Configuration
public class druidConfig {

    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource getDataSource(){
        return new DruidDataSource();
    }

}

四、测试数据源是什么类型 

@SpringBootTest
class SpringBootJdbcApplicationTests {

    @Autowired
    DataSource dataSource;

    @Test
    void contextLoads() {
        System.out.println(dataSource.getClass());
    }

}

五、新建一个controller测试

@RestController
@RequestMapping("/jdbc")
public class jdbcController {

    @Autowired
    JdbcTemplate jdbcTemplate;

    @GetMapping("/list")
    public List> userList(){
        String sql = "select * from user";
        List> maps = jdbcTemplate.queryForList(sql);
        return maps;
    }
}