1、添加druid的jar包到【${Tomcat_home}/lib】目录

2、在【${Tomcat_home}/conf/server.xml】中增加jndi数据源

<Resource name="jdbc/MyDataSource" auth="Container" type="javax.sql.DataSource" factory="com.alibaba.druid.pool.DruidDataSourceFactory"
username="root"
password="123456"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/camdb_training?useUnicode=true&characterEncoding=utf8&useSSL=false"
filters="stat,wall"
connectionProperties="druid.stat.mergeSql=true;druid.stat.slowSqlMillis=2000"
useGlobalDataSourceStat="true"
defaultTransactionIsolation="READ_COMMITTED"
validationQuery="select 1" />

该节点位于Server节点之下，和Listener节点平级

3、配置监控界面

在该文件【${Tomcat_home}/conf/web.xml】中添加以下内容

在servlet同级节点添加

<servlet>
	<servlet-name>DruidStatView</servlet-name>
	<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
	<init-param>
		<!-- 允许清空统计数据 -->
		<param-name>resetEnable</param-name>
		<param-value>true</param-value>
		</init-param>
		<init-param>
		<!-- 用户名 -->
		<param-name>loginUsername</param-name>
		<param-value>admin</param-value>
		</init-param>
		<init-param>
		<!-- 密码 -->
		<param-name>loginPassword</param-name>
		<param-value>admin</param-value>
	</init-param>
</servlet>

<servlet-mapping>
<servlet-name>DruidStatView</servlet-name>
<url-pattern>/druid/*</url-pattern>
</servlet-mapping>

4、通过访问http://localhost:8080/druid 界面，用户名admin，密码admin就可访问监控界面了。