SpringBoot系列記錄（八）——druid連接池及監控配置

一、相關POM依賴

   <!-- druid-spring-boot-starter -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>

        <!-- mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
<!--            <version>5.1.47</version>-->
            <scope>runtime</scope>
        </dependency>
        <!-- mybatis-spring-boot-starter -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

二、properties文件對數據源信息配置

基本上每行都有註釋，這裏主要說一下

spring.datasource.filters 如果配置了log4j,那麼依賴裏一定要有log4j，我在另一個項目中使用的log4j2，那麼我這裏配置log4j2也是沒問題的

server.port=8080

spring.datasource.druid.driver-class-name=com.mysql.jdbc.Driver
#spring.datasource.driver-class-name = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://localhost:3306/數據庫名?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
spring.datasource.username = root
spring.datasource.password = 1234

##########Druid連接池配置
# 初始化大小，最小，最大
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20

# 獲取數據庫連接等待的超時時間
spring.datasource.maxWait=60000

# 配置多久進行一次檢測，檢測需要關閉的空閒連接 單位毫秒
spring.datasource.timeBetweenEvictionRunsMillis=60000

#配置連接在池中的最小生存時間
spring.datasource.minEvictableIdleTimeMillis=300000

#系統啓動時通過該sql語句驗證數據庫是否可用，如果不配置validationQuery，則下面三項無效
spring.datasource.validationQuery=SELECT 1 FROM DUAL
#啓用空閒連接檢測，以便回收
spring.datasource.testWhileIdle=true
#從連接池獲取連接時，是否檢測連接可用性，開啓性能會有些許影響
spring.datasource.testOnBorrow=false
#釋放連接到連接池時，是否檢測連接可用性，開啓性能會有些許影響
spring.datasource.testOnReturn=false

#PSCache對支持遊標的數據庫性能提升巨大，比如說oracle。在mysql下建議關閉。
# 打開PSCache，並且指定每個連接上PSCache的大小
spring.datasource.poolPreparedStatements=false
spring.datasource.maxPoolPreparedStatementPerConnectionSize=0

#監控統計用的filter:stat日誌用的filter:log4j防禦sql注入的filter:wall  'wall'用於防火牆
spring.datasource.filters=stat,wall,log4j
# 通過connectProperties屬性來打開mergeSql功能；慢SQL記錄
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
#合併多個DruidDataSource的監控數據
#spring.datasource.useGlobalDataSourceStat=true

三、配置類DruidConfig

package com.example.demo.config;

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;

/**
 * User: wangy
 * Date: 2020/4/2
 * Description: No Description
 */
@Configuration
public class DruidConfig {

    /**
     * 配置讀取spring數據源
     */
    @Bean
    @ConfigurationProperties(prefix="spring.datasource")
    public DataSource druidDataSource() {
        return new DruidDataSource();
    }

    /**
     * 配置Druid監控啓動頁面
     */
    @Bean
    public ServletRegistrationBean druidStartViewServlet(){
        //org.springframework.boot.context.embedded.ServletRegistrationBean提供類的進行註冊.
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");

        //白名單：
        servletRegistrationBean.addInitParameter("allow","127.0.0.1");
        //IP黑名單 (存在共同時，deny優先於allow) : 如果滿足deny的話提示:Sorry, you are not permitted to view this page.
        //servletRegistrationBean.addInitParameter("deny","192.168.1.100");

        //登錄查看信息的賬號密碼.
        //servletRegistrationBean.addInitParameter("loginUsername","admin");
        //servletRegistrationBean.addInitParameter("loginPassword","123456");

        //是否能夠重置數據.
        servletRegistrationBean.addInitParameter("resetEnable","false");
        return servletRegistrationBean;
    }

    /**
     * Druid監控過濾器配置規則
     */
    @Bean
    public FilterRegistrationBean druidStartFilter(){
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());

        //添加過濾規則.
        filterRegistrationBean.addUrlPatterns("/*");

        //添加不需要忽略的格式信息.
        filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
}

至此配置已經結束了，啓動項目，測試也完美收官