【sping-boot】配置druid 连接池

添加配置

修改pom.xml文件

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

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.20</version>
        </dependency>

修改application.yml文件

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/komo?characterEncoding=utf-8
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
#   Druid连接池配置
    druid:
#     初始化大小，最小，最大
      initial-size: 5
      max-active: 30
      min-idle: 5
#      获取数据库连接等待的超时时间
      max-wait: 3000
      max-open-prepared-statements: -1
#      配置多久进行一次检测，检测需要关闭的空闲连接 单位毫秒
      time-between-eviction-runs-millis: 60000
#      配置连接在池中的最小生存时间
      min-evictable-idle-time-millis: 300000
#      配置连接在池中的最大生存时间
      max-evictable-idle-time-millis: 400000
#      系统启动时通过该sql语句验证数据库是否可用，如果不配置validationQuery，则下面三项无效
      validation-query: SELECT 1
#      启用空闲连接检测，以便回收
      test-while-idle: true
#      从连接池获取连接时，是否检测连接可用性，开启性能会有些许影响
      test-on-borrow: false
#      释放连接到连接池时，是否检测连接可用性，开启性能会有些许影响
      test-on-return: false
#      打开PSCache，并且指定每个连接上PSCache的大小
      pool-prepared-statements: false
      max-pool-prepared-statement-per-connection-size: 20
#      配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
      filters: stat,wall
      use-global-data-source-stat: true
#      通过connectProperties属性来打开mergeSql功能；慢SQL记录
      connect-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

server:
  port: 7080

添加配置druid配置

DruidConfig.java

package com.example.druiddemo.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import javax.sql.DataSource;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author komiles@163.com
 * @date 2020-05-11 16:12
 */
@Configuration
public class DruidConfig {

    @Bean
    public ServletRegistrationBean druidServlet() {
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        // IP白名单
        servletRegistrationBean.addInitParameter("allow", "127.0.0.1");
        // IP黑名单(共同存在时，deny优先于allow)
//        servletRegistrationBean.addInitParameter("deny", "192.168.1.100");
        //控制台管理用户
        servletRegistrationBean.addInitParameter("loginUsername", "admin");
        servletRegistrationBean.addInitParameter("loginPassword", "admin");
        //是否能够重置数据 禁用HTML页面上的“Reset All”功能
        servletRegistrationBean.addInitParameter("resetEnable", "false");
        return servletRegistrationBean;
    }


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

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