Druid实现监控

1 和Spring整合

添加对应的依赖
修改Spring配置文件中数据源的内容：

<!-- 配置数据源 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
    <property name="driverClassName" value="${driver}" />
    <property name="url" value="${url}" />
    <property name="username" value="${names}" />
    <property name="password" value="${password}" />
</bean>

2.Druid开启监控

Druid中内置的提供的有一个StatFilter，用于统建监控信息，StatFilter的别名stat, druid-xxx.jar /META-INF/druid-filter.properties：

druid.filters.default=com.alibaba.druid.filter.stat.StatFilter
druid.filters.stat=com.alibaba.druid.filter.stat.StatFilter
druid.filters.mergeStat=com.alibaba.druid.filter.stat.MergeStatFilter
druid.filters.counter=com.alibaba.druid.filter.stat.StatFilter
druid.filters.encoding=com.alibaba.druid.filter.encoding.EncodingConvertFilter
druid.filters.log4j=com.alibaba.druid.filter.logging.Log4jFilter
druid.filters.log4j2=com.alibaba.druid.filter.logging.Log4j2Filter
druid.filters.slf4j=com.alibaba.druid.filter.logging.Slf4jLogFilter
druid.filters.commonlogging=com.alibaba.druid.filter.logging.CommonsLogFilter
druid.filters.commonLogging=com.alibaba.druid.filter.logging.CommonsLogFilter
druid.filters.wall=com.alibaba.druid.wall.WallFilter
druid.filters.config=com.alibaba.druid.filter.config.ConfigFilter

2.1开启统计

 <!-- 开启监控统计 -->
        <property name="filters" value="stat" />

2.2 在web.xml中配置相关过滤器

<!--druid 监控 -->
  <filter>
    <filter-name>DruidWebStatFilter</filter-name>
    <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>
    <async-supported>true</async-supported>
    <init-param>
      <param-name>exclusions</param-name>
      <param-value>/static/*,*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value>
    </init-param>
    <init-param>
      <param-name>sessionStatMaxCount</param-name>
      <param-value>1000</param-value>
    </init-param>
  </filter>

  <filter-mapping>
    <filter-name>DruidWebStatFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- druid监控 -->

  <servlet>
    <servlet-name>DruidStatView</servlet-name>
    <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
    <async-supported>true</async-supported>
  </servlet>

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

2.3 添加相应的控制器

@Controller
@RequestMapping("/druid")
public class DruidController {
    @RequestMapping("/index")
    public String index(Model model, HttpServletRequest request){
        return "/druid/index";
    }
}