一办绝、引言

Druid是Java語言中最好的數(shù)據(jù)庫連接池蔗崎。Druid能夠提供強(qiáng)大的監(jiān)控和擴(kuò)展功能约素。
Druid內(nèi)置提供了一個(gè)StatViewServlet用于展示Druid的統(tǒng)計(jì)信息书释。
因?yàn)榘⒗锇桶烷_源了druid連接池源碼拇囊，我們可以通過maven倉庫可以獲得jar包依賴硅急。
訪問mvnrepository.com/artifact/com.alibaba/druid選擇1.0.29覆享，點(diǎn)擊進(jìn)入后復(fù)制maven內(nèi)容到pom.xml內(nèi)即可

二、實(shí)現(xiàn)

1营袜、引入依賴

<!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.29</version>
        </dependency>

2撒顿、包結(jié)構(gòu)展示如下

3、配置 Druid 數(shù)據(jù)源

server:
  port: 9090
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3308/user_test?useUnicode=true&useSSL=false&characterEncoding=UTF-8

    #配置監(jiān)控統(tǒng)計(jì)攔截的 filters,去掉后監(jiān)控界面sql無法統(tǒng)計(jì)荚板，'wall'用于防火墻
    filters: stat, wall
    #最大活躍數(shù)
    maxActive: 20
    #初始化數(shù)量
    initialSize: 1
    #最大連接等待超時(shí)時(shí)間
    maxWait: 60000
    #打開PSCache凤壁，并且指定每個(gè)連接PSCache的大小
    poolPreparedStatements: true
    maxPoolPreparedStatementPerConnectionSize: 20
    #通過connectionProperties屬性來打開mergeSql功能；慢SQL記錄
    #connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
    minIdle: 1
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: select 1 from dual
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false

jpa:
  database: MySQL
  show-sql: true
  format_sql: true
  hibernate:
   naming_strategy: org.hibernate.cfg.ImprovedNamingStrategy

4跪另、Configuration 包中編寫 druid 監(jiān)控類

package com.ly.springbootjpa.configuration;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;

/**
 * druid 監(jiān)控
 */
@Configuration
public class DruidConfiguration {

    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid(){
        return new DruidDataSource();
    }

    /**
     * druid 數(shù)據(jù)源狀態(tài)監(jiān)控
     * @return
     */
    @Bean
    public ServletRegistrationBean statViewServlet(){
        //創(chuàng)建servlet注冊(cè)實(shí)體
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
        //設(shè)置ip白名單
        servletRegistrationBean.addInitParameter("allow","127.0.0.1");
        //設(shè)置ip黑名單拧抖，如果allow與deny共同存在時(shí),deny優(yōu)先于allow
        servletRegistrationBean.addInitParameter("deny","192.168.0.19");
        //設(shè)置控制臺(tái)管理用戶
        servletRegistrationBean.addInitParameter("loginUsername","druid");
        servletRegistrationBean.addInitParameter("loginPassword","123456");
        //是否可以重置數(shù)據(jù)
        servletRegistrationBean.addInitParameter("resetEnable","false");
        return servletRegistrationBean;
    }

    /**
     * druid 過濾器
     * @return
     */
    @Bean
    public FilterRegistrationBean statFilter(){
        //創(chuàng)建過濾器
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
        //設(shè)置過濾器過濾路徑
        filterRegistrationBean.addUrlPatterns("/*");
        //忽略過濾的形式
        filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
}

5、登錄監(jiān)控中心 （用戶名：druid 密碼：123456）

6免绿、在監(jiān)控中心中查看各種信息

當(dāng)執(zhí)行不同的 方法操作后會(huì)對(duì)于不同的監(jiān)控信息記錄
監(jiān)控中心說明如下：

參考鏈接：http://www.reibang.com/p/28b4889b5f20