1. 引入druid的Maven依賴

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.12</version>
</dependency>

2. application.yml配置

druid:
  resetEnable: false
  #管理員賬號
  loginUsername: admin
  #管理員密碼
  loginPassword: 123
  #訪問IP限制
  allow: '127.0.0.1,192.135.0.1/24'
db:
  driver-class-name: com.mysql.cj.jdbc.Driver
  #連線數初始化大小，最小，最大
  initialSize: 5
  min-idle: 5
  max-active: 20
  # 配置獲取連線等待超時的時間
  max-wait-millis: 60000
  # 配置間隔多久才進行一次檢測，檢測需要關閉的空閒連線，單位是毫秒
  time-between-eviction-runs-millis: 3600000
  # 配置一個連線在池中最小生存的時間，單位是毫秒
  min-evictable-idle-time-millis: 3600000
  # 配置監控統計攔截的filters，去掉後監控介面sql無法統計，'wall'用於防火牆
  filters: slf4j,wall,stat
  # 通過connectProperties屬性來開啟mergeSql功能；慢SQL記錄
  connection-properties: 'defaultRowPrefetch=5000;druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500'
  # 合併多個DruidDataSource的監控資料
  use-global-data-source-stat: true
  #校驗SQL
  validation-query: SELECT 'x'
  test-while-idle: true
  test-on-borrow: true
  test-on-return: false
  # 開啟PSCache（快取遊標），並且指定每個連線上PSCache的大小
  poolPreparedStatements: true
  maxPoolPreparedStatementPerConnectionSize: 20
  #其他
  default-auto-commit: true
  connection-init-sqls: ["set names utf8"]
 

3. druid配置對應實體類

@Configuration
@ConfigurationProperties(prefix = "druid")
@Data
public class DruidProperties {
    private String resetEnable;
    private String loginUsername;
    private String loginPassword;
    private String allow;
}

4. druid監控配置

@Configuration
public class DruidConfig {

    @Bean
    public StatFilter statFilter() {
        return new StatFilter();
    }

    @Bean
    public WallConfig wallConfig() {
        return new WallConfig();
    }

    @Bean
    public WallFilter wallFilter(WallConfig wallConfig) {
        WallFilter filter = new WallFilter();
        filter.setConfig(wallConfig);
        return filter;
    }

    @Bean
    public Slf4jLogFilter slf4jLogFilter() {
        return new Slf4jLogFilter();
    }

    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean<Filter> filterRegistrationBean = new FilterRegistrationBean<>();
        filterRegistrationBean.setFilter(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        filterRegistrationBean.setOrder(5);
        return filterRegistrationBean;
    }

    @Bean
    @Autowired
    public ServletRegistrationBean druidServlet(DruidProperties druidProperties) {
        ServletRegistrationBean<StatViewServlet> servletRegistrationBean
                = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");
        servletRegistrationBean.addInitParameter("resetEnable",druidProperties.getResetEnable());
        servletRegistrationBean.addInitParameter("loginUsername",druidProperties.getLoginUsername());
        servletRegistrationBean.addInitParameter("loginPassword",druidProperties.getLoginPassword());
        servletRegistrationBean.addInitParameter("allow",druidProperties.getAllow());
        return servletRegistrationBean;
    }

    @Bean
    public Advice advice() {
        return new DruidStatInterceptor();
    }

    //patterns指定Mapper介面
    @Bean
    public Advisor advisor() {
        String[] patterns = new String[]{"com.myproject.test.query.*.mapper.*",
                "com.myproject.test.*.domain.repository.*"};
        return new RegexpMethodPointcutAdvisor(patterns, advice());
    }

    @Bean
    public DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator() {
        DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator = new DefaultAdvisorAutoProxyCreator();
        advisorAutoProxyCreator.setProxyTargetClass(true);
        return advisorAutoProxyCreator;
    }
}