druid 是阿里开源的数据库连接池。

开发时整合   druid 数据源过程。

1.修改pom.xml

 <dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.26</version></dependency>

增加上面的配置。

2.编辑配置数据源代码。

packagecom.neo.conf;importjavax.sql.DataSource;importorg.springframework.boot.context.properties.ConfigurationProperties;importorg.springframework.boot.web.servlet.FilterRegistrationBean;importorg.springframework.boot.web.servlet.ServletRegistrationBean;importorg.springframework.context.annotation.Bean;importorg.springframework.context.annotation.Configuration;importorg.springframework.context.annotation.PropertySource;importcom.alibaba.druid.pool.DruidDataSource;importcom.alibaba.druid.support.http.StatViewServlet;importcom.alibaba.druid.support.http.WebStatFilter;@Configuration
@ConfigurationProperties(value= "classpath:druid.properties")public classDruidConfiguration {@Bean(destroyMethod= "close", initMethod = "init")@ConfigurationProperties(prefix= "spring.datasource")publicDataSource druidDataSource() {DruidDataSource druidDataSource= newDruidDataSource();returndruidDataSource;}/*** 注册一个StatViewServlet*@return*/@BeanpublicServletRegistrationBean druidStatViewServlet(){//org.springframework.boot.context.embedded.ServletRegistrationBean提供类的进行注册.ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");//添加初始化参数：initParams//白名单：servletRegistrationBean.addInitParameter("allow","127.0.0.1,192.168.31.77");//IP黑名单 (存在共同时，deny优先于allow) : 如果满足deny的话提示:Sorry, you are not permitted to view this page.servletRegistrationBean.addInitParameter("deny","192.168.1.73");//登录查看信息的账号密码.servletRegistrationBean.addInitParameter("loginUsername","admin");servletRegistrationBean.addInitParameter("loginPassword","123456");//是否能够重置数据.servletRegistrationBean.addInitParameter("resetEnable","false");returnservletRegistrationBean;}/*** 注册一个：filterRegistrationBean*@return*/@BeanpublicFilterRegistrationBean druidStatFilter(){FilterRegistrationBean filterRegistrationBean= new FilterRegistrationBean(newWebStatFilter());//添加过滤规则.filterRegistrationBean.addUrlPatterns("/*");//添加不需要忽略的格式信息.filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");returnfilterRegistrationBean;}
}

3.编写配置文件 druid.properties

spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/mycine?useUnicode=true&characterEncoding=utf8&autoReconnect=true
spring.datasource.username=root
spring.datasource.password=root
#--------------------------
# 下面为连接池的补充设置，应用到上面所有数据源中
# 初始化大小，最小，最大
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=50
# 配置获取连接等待超时的时间
spring.datasource.maxWait=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.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=false
#spring.datasource.maxPoolPreparedStatementPerConnectionSize=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
#spring.datasource.filters=stat,wall,log4j
spring.datasource.filters=stat
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多个DruidDataSource的监控数据
#spring.datasource.useGlobalDataSourceStat=true

4.启动程序查看效果