Detailed introduction to Druid monitoring page

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1. Add Durid connection pool dependency in Maven

<!-- druid连接池 -->
<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>druid</artifactId>
  <version>1.0.29</version>
</dependency>

2 , Configure Druid data source in Spring, and set monitoring parameters

<!-- druid数据源 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
  <!-- 基本属性 url、user、password -->
  <property name="url" value="${db.url}" />
  <property name="username" value="${db.username}" />
  <property name="password" value="${db.password}" />

  <!-- 配置初始化大小、最小、最大 -->
  <property name="initialSize" value="20" />
  <property name="minIdle" value="1" />
  <property name="maxActive" value="40" />

  <!-- 配置获取连接等待超时的时间 -->
  <property name="maxWait" value="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 -->
  <property name="timeBetweenEvictionRunsMillis" value="60000" />

  <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
  <property name="minEvictableIdleTimeMillis" value="300000" />

  <property name="validationQuery" value="SELECT &#39;x&#39;" />
  <property name="testWhileIdle" value="true" />
  <property name="testOnBorrow" value="false" />
  <property name="testOnReturn" value="false" />

  <!-- 配置监控统计拦截的filters -->
  <property name="filters" value="stat" />
  </bean>

3. Configure Druid monitoring Servlet## in web.xml

#

<!-- druid监控 -->
  <servlet>
  <servlet-name>DruidStatView</servlet-name>
  <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
  <init-param>
  <!-- 用户名 -->
  <param-name>loginUsername</param-name>
  <param-value>druid</param-value>
  </init-param>
  <init-param>
  <!-- 密码 -->
  <param-name>loginPassword</param-name>
  <param-value>bounter</param-value>
  </init-param>
  </servlet>
  <servlet-mapping>
  <servlet-name>DruidStatView</servlet-name>
  <url-pattern>/druid/*</url-pattern>
  </servlet-mapping>

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