废话少说，按SpringBoot的老套路来。

【step1】：添加依赖

<!-- 数据库连接池  -->
<dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.25</version>
</dependency>

【step2】：application.yml中添加对应配置

spring:datasource:driverClassName: com.mysql.jdbc.Driverurl: jdbc:mysql://对应自己的数据库连接
username: xxxpassword: xxx
######################### Druid连接池的配置信息  #################
spring.druid.initialSize:5#初始化连接大小
spring.druid.minIdle:5#最小连接池数量
spring.druid.maxActive:20#最大连接池数量
spring.druid.maxWait:60000#获取连接时最大等待时间，单位毫秒
spring.druid.timeBetweenEvictionRunsMillis:60000#配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
spring.druid.minEvictableIdleTimeMillis:300000#配置一个连接在池中最小生存的时间，单位是毫秒
spring.druid.validationQuery: SELECT1FROM DUAL            #测试连接
spring.druid.testWhileIdle:true#申请连接的时候检测，建议配置为true，不影响性能，并且保证安全性
spring.druid.testOnBorrow:false#获取连接时执行检测，建议关闭，影响性能
spring.druid.testOnReturn:false#归还连接时执行检测，建议关闭，影响性能
spring.druid.poolPreparedStatements:false#是否开启PSCache，PSCache对支持游标的数据库性能提升巨大，oracle建议开启，mysql下建议关闭
spring.druid.maxPoolPreparedStatementPerConnectionSize:20#开启poolPreparedStatements后生效
spring.druid.filters: stat,wall,log4j                       #配置扩展插件，常用的插件有=>stat:监控统计  log4j:日志  wall:防御sql注入
spring.druid.connectionProperties:'druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000'  #通过connectProperties属性来打开mergeSql功能;慢SQL记录

【step3】：java代码中读取配置，并做相关转换(比如数据库密码加解密等，这里省略)

importjava.sql.SQLException;importjavax.sql.DataSource;importorg.springframework.beans.factory.annotation.Value;importorg.springframework.boot.context.embedded.FilterRegistrationBean;importorg.springframework.boot.context.embedded.ServletRegistrationBean;importorg.springframework.context.annotation.Bean;importorg.springframework.context.annotation.Configuration;importorg.springframework.context.annotation.Primary;importcom.alibaba.druid.pool.DruidDataSource;importcom.alibaba.druid.support.http.StatViewServlet;importcom.alibaba.druid.support.http.WebStatFilter;@Configurationpublic classDruidConfiguration {@Value("${spring.datasource.url}")privateString url;@Value("${spring.datasource.username}")privateString username;@Value("${spring.datasource.password}")privateString password;@Value("${spring.datasource.driverClassName}")privateString driverClassName;@Value("${spring.druid.initialSize}")private intinitialSize;@Value("${spring.druid.minIdle}")private intminIdle;@Value("${spring.druid.maxActive}")private intmaxActive;@Value("${spring.druid.maxWait}")private intmaxWait;@Value("${spring.druid.timeBetweenEvictionRunsMillis}")private inttimeBetweenEvictionRunsMillis;@Value("${spring.druid.minEvictableIdleTimeMillis}")private intminEvictableIdleTimeMillis;@Value("${spring.druid.validationQuery}")privateString validationQuery;@Value("${spring.druid.testWhileIdle}")private booleantestWhileIdle;@Value("${spring.druid.testOnBorrow}")private booleantestOnBorrow;@Value("${spring.druid.testOnReturn}")private booleantestOnReturn;@Value("${spring.druid.poolPreparedStatements}")private booleanpoolPreparedStatements;@Value("${spring.druid.maxPoolPreparedStatementPerConnectionSize}")private intmaxPoolPreparedStatementPerConnectionSize;@Value("${spring.druid.filters}")privateString filters;@Value("{spring.druid.connectionProperties}")privateString connectionProperties;@Bean@PrimarypublicDataSource dataSource() {DruidDataSource datasource= newDruidDataSource();datasource.setUrl(url);datasource.setUsername(username);datasource.setPassword(password);//这里可以做加密处理
datasource.setDriverClassName(driverClassName);//configuration
datasource.setInitialSize(initialSize);datasource.setMinIdle(minIdle);datasource.setMaxActive(maxActive);datasource.setMaxWait(maxWait);datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);datasource.setValidationQuery(validationQuery);datasource.setTestWhileIdle(testWhileIdle);datasource.setTestOnBorrow(testOnBorrow);datasource.setTestOnReturn(testOnReturn);datasource.setPoolPreparedStatements(poolPreparedStatements);datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);try{datasource.setFilters(filters);}catch(SQLException e) {}datasource.setConnectionProperties(connectionProperties);returndatasource;}@BeanpublicServletRegistrationBean statViewServlet(){ServletRegistrationBean servletRegistrationBean= new ServletRegistrationBean(new StatViewServlet(),"/druid/*");servletRegistrationBean.addInitParameter("allow","127.0.0.1");  //设置ip白名单servletRegistrationBean.addInitParameter("deny","192.168.0.19");//设置ip黑名单，优先级高于白名单//设置控制台管理用户servletRegistrationBean.addInitParameter("loginUsername","root");servletRegistrationBean.addInitParameter("loginPassword","root");//是否可以重置数据servletRegistrationBean.addInitParameter("resetEnable","false");returnservletRegistrationBean;}@BeanpublicFilterRegistrationBean statFilter(){//创建过滤器FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(newWebStatFilter());//设置过滤器过滤路径filterRegistrationBean.addUrlPatterns("/*");//忽略过滤的形式filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");returnfilterRegistrationBean;}
}

【step4】：测试

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