springboot中默认是使用的tomcat的连接池，如果我们想要第三方的连接池，我们这么配置呢？
首先在application.yml文件中注释掉之前数据库的配置，重新用druid的方式配置：
#spring: #datasource: # driver-class-name: com.mysql.jdbc.Driver # url: jdbc:mysql://127.0.0.1:3306/house
#username: root #password: root mybatis.config-location = classpath:/mybatis/mybatis-config.xml spring.druid.url = jdbc:mysql://127.0.0.1:3306/house
spring.druid.username = root spring.druid.password = root spring.druid.driverClassName = com.mysql.jdbc.Driver spring.druid.initialSize=5 spring.druid.minIdle=5 spring.druid.maxActive=20 spring.druid.maxWait=10000 spring.druid.timeBetweenEvictionRunsMillis=60000 spring.druid.minEvictableIdleTimeMillis=300000 spring.druid.validationQuery=SELECT 1 FROM DUAL spring.druid.testWhileIdle=true
在pom文件中配置依赖库：
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.8</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>18.0</version> <!--特别注意这个地方版本也不能乱 -->
</dependency>
新建DruidConfig配置文件：
@Configuration public class DruidConfig { @ConfigurationProperties(prefix="spring.druid") //将配置文件中spring.druid.*配置到DruidDataSource中
@Bean(initMethod="init",destroyMethod="close") public DruidDataSource dataSource(Filter statFilter) throws SQLException{ DruidDataSource dataSource = new DruidDataSource(); dataSource.setProxyFilters(Lists.newArrayList(statFilter())); return dataSource; } //配置慢连接过滤
@Bean public Filter statFilter(){ StatFilter filter = new StatFilter(); filter.setSlowSqlMillis(5000); filter.setLogSlowSql(true); filter.setMergeSql(true); return filter; } //添加监控，可以帮助我们分析慢sql和每个sql的执行时间
@Bean public ServletRegistrationBean servletRegistrationBean(){ return new ServletRegistrationBean(new StatViewServlet(), "/druid/*"); } }
然后启动项目，在浏览器中输入地址http://127.0.0.1:8080/user对数据库中的user表进行查询后，再访问http://127.0.0.1:8080/druid将会显示页面如下，可以对数据源、sql监控等进行查询：
