springboot集成druid连接池

使用druid连接池主要有几步：

1、添加jar和依赖

	<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、配置文件：

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: *****
#最大连接数
    maxActive: 30
#最小连接数
    minIdle: 5
#获取连接的最大等待时间
    maxWait: 10000
#解决mysql8小时的问题
    validationgQuery: SELECT 'X'
#空闲连接的检查时间间隔
    timeBetweenEvictionRunsMillis: 60000
#空闲连接最小空闲时间
    minEvictableIdleTimeMillis: 300000

3、配置连接池的监控和慢sql处理

连接池的监控连接：

http://ip:port/ 项目名/druid/或http://ip:port/ 项目名/druid/index.html即可访问 

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连接池的配置,配置如何处理慢sql，
 */
@Configuration
public class DruidConfig {
    //这个注解读取配置文件前缀为prefix的配置，将外部的配置文件与这里绑定
    @ConfigurationProperties(prefix = "spring.druid")
    //容器的开启与关闭
    @Bean(initMethod = "init",destroyMethod = "close")
    public DruidDataSource dataSource(){
        DruidDataSource dataSource=new DruidDataSource();
        dataSource.setProxyFilters(Lists.newArrayList(statFilter()));
        return  dataSource;
    }
//bean注解，成为spring的bean，利用filter将慢sql的日志打印出来
    @Bean
    public Filter statFilter(){
        StatFilter statFilter=new StatFilter();
        //多长时间定义为慢sql，这里定义为5s
        statFilter.setSlowSqlMillis(5000);
        //是否打印出慢日志
        statFilter.setLogSlowSql(true);
        //是否将日志合并起来
        statFilter.setMergeSql(true);
        return  statFilter;
    }
    //这是配置druid的监控
    @Bean
    public ServletRegistrationBean servletRegistrationBean(){
        return new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
    }

}