SpringBoot整合druid数据源

一、对应的pom.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>cn.smilexl</groupId>
    <artifactId>springboot_mybatis</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot_mybatis</name>
    <description>springboot整合mybatis</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--引入druid数据源-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.12</version>
        </dependency>
        <!--log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!--test-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

二、相应的yml配置文件

1、application.yml配置文件

server:
  port: 80
spring:
  profiles:
    active: dev  #指定对应的配置文件

2、application-dev.yml配置文件

server:
  port: 8081
spring:
  datasource:
    url: jdbc:mysql://localhost:3306/mybatis
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: 123456
    type: com.alibaba.druid.pool.DruidDataSource

#durid数据源属性
#   数据源其他配置
    initialSize: 5 #初始化连接个数
    minIdle: 5 #最小连接池数量
    maxActive: 20 #最大连接数量
    maxWait: 60000 #获取连接时最大等待时间，单位毫秒
    timeBetweenEvictionRunsMillis: 60000 #(1)Destroy线程会检测连接的间隔时间，(2)testWhileIdle的判断依据
    minEvictableIdleTimeMillis: 300000 #连接保持空闲而不被驱逐的最小时间
    validationQuery: SELECT 1 FROM DUAL #检测连接是否有效的sql，要求是一个查询语句
    testWhileIdle: true #申请连接的时候检测
    testOnBorrow: false #申请连接时执行validationQuery检测连接是否有效，做了这个配置会降低性能
    testOnReturn: false #归还连接时执行validationQuery检测连接是否有效，做了这个配置会降低性能
    poolPreparedStatements: true #是否缓存preparedStatement
#   配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

三、在 config 包下配置druid数据源，数据监控(DruiudConfig.java)

package cn.smilexl.springboot_mybatis.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;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
 * @ClassName: Durid数据源属性配置
 * @Description: //TODO
 * @Author: LL
 * @Date: 2019/7/17 10:09
 * @Version: V1.0
 */
@Configuration
public class DruidConfig{

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

    //配置druid的数据监控
    //1、配置一个管理后台的Servlet
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
        Map<String,String> initParams = new HashMap<>();//设置初始化参数
        initParams.put("loginUsername","admin");//用户名
        initParams.put("loginPassword","123456");//登录密码
        initParams.put("allow","");//默认就是允许所有访问
        initParams.put("deny","192.168.15.21");//拒绝谁访问
        return bean;
    }

    //2、配置一个web监控的filter
    @Bean
    public FilterRegistrationBean webStatFilter() {
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
        Map<String, String> initParams = new HashMap<>();//设置初始化参数
        initParams.put("exclusions", "*.js,*.css,/druid/*");//排除的拦截请求
        bean.setInitParameters(initParams);
        bean.setUrlPatterns(Arrays.asList("/*"));//拦截所有请求
        return bean;
    }
}

启动项目在浏览器中查看： http://localhost:8081/druid