【SpringBoot学习】11-Jdbc搭建以及配置Druid连接池

1、首先几个必须的依赖

JDBC

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

mysql

 <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

Druid

<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.21</version>
        </dependency>

2、yml配置 datasource以及druid

spring:
  datasource:
    username: root
    password: 不愿意透漏密码的同学
    url: jdbc:mysql://127.0.0.1:3306/jdbc?serverTimezone=GMT%2B8
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    initialSize: 8
    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,logback
    maxPoolPreparedStatementPerConnectionSize: 25
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

无敌不需要Test
直接controller

3、controller 测试

*@RestController 为 responbody+@Controller的合体 *

@GetMapping 为 get 的 requestMapping

@RestController
public class ProviderController {
    @Autowired
    JdbcTemplate jdbcTemplate;

    @GetMapping("/providers")
    public Map list() {
        List<Map<String, Object>> maps = jdbcTemplate.queryForList("select * from provider");
        Map<String, Object> map = maps.get(0);
        return map;
    }
}

4、End

数据库中数据

返回的数据