Springboot入門2-配置druid

Druid是Java語言中最好的數據庫連接池，在連接池之外，還提供了非常優秀的監控功能。

下面來說明如何在 Spring Boot 中配置使用Druid

1、添加Maven依賴 (或jar包)

<!--druid-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.11</version>
        </dependency>

2、配置數據源相關信息

####################數據源配置####################
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/springsea?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=root

# 初始化大小，最小，最大
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
# 配置獲取連接等待超時的時間
spring.datasource.maxWait=60000
# 配置間隔多久才進行一次檢測，檢測需要關閉的空閑連接，單位是毫秒
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一個連接在池中最小生存的時間，單位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 配置監控統計攔截的filters，去掉后監控界面sql無法統計，'wall'用於防火牆
spring.datasource.filters=stat,wall,log4j
# 通過connectProperties屬性來打開mergeSql功能（參數不同的sql合並統計）、慢SQL記錄（執行時間長的sql）
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合並多個DruidDataSource的監控數據
#spring.datasource.useGlobalDataSourceStat=true

詳細配置參考：spring配置數據庫連接池druid

 

3、創建配置文件

目前Spring Boot中默認支持的連接池有dbcp,dbcp2, tomcat, hikari三種連接池。 

由於Druid暫時不在Spring Boot中的直接支持，故需要進行配置信息的定制。

package com.xzh.config;

import java.sql.SQLException;

import javax.sql.DataSource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Value;
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 org.springframework.context.annotation.Primary;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;

/**
 * Created by xiangzh on 2017/12/5.
 */
@Configuration
public class DruidConfig {

    private Logger logger = LoggerFactory.getLogger(DruidConfig.class);

    @Value("${spring.datasource.url}")
    private String dbUrl;

    @Value("${spring.datasource.username}")
    private String username;

    @Value("${spring.datasource.password}")
    private String password;

    @Value("${spring.datasource.driver-class-name}")
    private String driverClassName;

    @Value("${spring.datasource.initialSize}")
    private int initialSize;

    @Value("${spring.datasource.minIdle}")
    private int minIdle;

    @Value("${spring.datasource.maxActive}")
    private int maxActive;

    @Value("${spring.datasource.maxWait}")
    private int maxWait;

    @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
    private int timeBetweenEvictionRunsMillis;

    @Value("${spring.datasource.minEvictableIdleTimeMillis}")
    private int minEvictableIdleTimeMillis;

    @Value("${spring.datasource.validationQuery}")
    private String validationQuery;

    @Value("${spring.datasource.testWhileIdle}")
    private boolean testWhileIdle;

    @Value("${spring.datasource.testOnBorrow}")
    private boolean testOnBorrow;

    @Value("${spring.datasource.testOnReturn}")
    private boolean testOnReturn;

    @Value("${spring.datasource.filters}")
    private String filters;

    @Value("${spring.datasource.connectionProperties}") 
　　 private String connectionProperties; 

    @Primary
    @Bean(name = "dataSource")
    public DataSource dataSource() {
        DruidDataSource datasource = new DruidDataSource();
        datasource.setUrl(this.dbUrl);
        datasource.setUsername(username);
        datasource.setPassword(password);
        datasource.setDriverClassName(driverClassName); //configuration
        datasource.setInitialSize(initialSize);
        datasource.setMinIdle(minIdle);
        datasource.setMaxActive(maxActive);
        datasource.setMaxWait(maxWait);
        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        datasource.setValidationQuery(validationQuery);
        datasource.setTestWhileIdle(testWhileIdle);
        datasource.setTestOnBorrow(testOnBorrow);
        datasource.setTestOnReturn(testOnReturn);
        try {
            datasource.setFilters(filters);
        } catch (SQLException e) {
            logger.error("druid configuration initialization filter", e);
        }
        datasource.setConnectionProperties(connectionProperties);
        return datasource;
    }

    /**
     * 注冊一個StatViewServlet * @return
     */
    @Bean
    public ServletRegistrationBean DruidStatViewServle2() {
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid333/*"); //添加初始化參數：initParams 
        /** 白名單，如果不配置或value為空，則允許所有 */
        servletRegistrationBean.addInitParameter("allow", "127.0.0.1,192.0.0.1"); /** 黑名單，與白名單存在相同IP時，優先於白名單 */
        servletRegistrationBean.addInitParameter("deny", "192.0.0.1"); /** 用戶名 */
        servletRegistrationBean.addInitParameter("loginUsername", "xiangzhenhai"); /** 密碼 */
        servletRegistrationBean.addInitParameter("loginPassword", "xzh335645"); /** 禁用頁面上的“Reset All”功能 */
        servletRegistrationBean.addInitParameter("resetEnable", "false");
        return servletRegistrationBean;
    }

    /**
     * 注冊一個：WebStatFilter * @return
     */
    @Bean
    public FilterRegistrationBean druidStatFilter2() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter()); /** 過濾規則 */
        filterRegistrationBean.addUrlPatterns("/*"); /** 忽略資源 */
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid333/*");
        return filterRegistrationBean;
    }
}

 

 

4、啟動項目，查看druid監控

 

 

 

參考：

 Spring Boot 使用 Druid 和監控配置

Spring Boot Druid數據源配置