springboot integrated druid connection pool

There are several main steps to use the druid connection pool:

1. Add jar and dependencies

	<groupId>org.mybatis.spring.boot</groupId>
		<artifactId>mybatis-spring-boot-starter</artifactId>
		<version>1.3.2</version>
	</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>6.0.4</version>
		</dependency>

		<dependency>
			<groupId>com.google.guava</groupId>
			<artifactId>guava</artifactId>
			<version>18.0</version>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version>1.16.20</version>
			<scope>provided</scope>
		</dependency>
		<!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.1.9</version>
		</dependency>

2. Configuration file:

server:
  port: 1111
spring:
  application:
    name: springboothouse
  druid:
    druidClassName: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/houseselling?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
    username: root
    password: *****
#Maximum number of connections
    maxActive: 30
#Minimum number of connections
    minIdle: 5
#Get the maximum wait time for a connection
    maxWait: 10000
#Solve the problem of mysql8 hours
    validationgQuery: SELECT 'X'
#Check interval for idle connections
    timeBetweenEvictionRunsMillis: 60000
#Idle connection minimum idle time
    minEvictableIdleTimeMillis: 300000

3. Configure connection pool monitoring and slow SQL processing

Connection pool monitoring connection:

http://ip:port/ project name/druid/ or http://ip:  port/ project name/druid/ index.html can be accessed 

 

package com.house.sell.config;

import com.alibaba.druid.filter.Filter;
import com.alibaba.druid.filter.stat.StatFilter;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.google.common.collect.Lists;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;

/**
 *Druid connection pool configuration, configure how to deal with slow SQL,
 */
@Configuration
public class DruidConfig {
    //This annotation reads the configuration file with the prefix prefix, and binds the external configuration file to this
    @ConfigurationProperties(prefix = "spring.druid")
    //Open and close the container
    @Bean(initMethod = "init",destroyMethod = "close")
    public DruidDataSource dataSource(){
        DruidDataSource dataSource=new DruidDataSource();
        dataSource.setProxyFilters(Lists.newArrayList(statFilter()));
        return  dataSource;
    }
//Bean annotation, become spring's bean, use filter to print out the log of slow sql
    @Bean
    public Filter statFilter(){
        StatFilter statFilter=new StatFilter();
        //How long is defined as slow sql, here is defined as 5s
        statFilter.setSlowSqlMillis(5000);
        //Whether to print out slow log
        statFilter.setLogSlowSql(true);
        // Whether to merge the logs
        statFilter.setMergeSql(true);
        return  statFilter;
    }
    //This is the monitoring of the configuration druid
    @Bean
    public ServletRegistrationBean servletRegistrationBean(){
        return new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
    }

}