Springboot之Druid配置详解

参数配置说明

druid 参数配置详解 - halberd.lee - 博客园 (cnblogs.com)https://www.cnblogs.com/halberd-lee/p/11304790.htmlSpringboot中配置Druid

• maven依赖

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            mysql
            mysql-connector-java
            runtime
        
        <--druid依赖-->
        
            com.alibaba
            druid-spring-boot-starter
            1.1.10
        
        
        
            org.springframework.boot
            spring-boot-starter-jdbc
            2.5.3
        

• yaml文件配置

spring:
  datasource:
    #   数据源基本配置
    url: jdbc:mysql://localhost:3306/hotel?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
    username: root
    password: 123456
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
  #   数据源其他配置
    druid:
      #     配置初始化大小、最小、最大线程数
      initialSize: 5
      minIdle: 5
      #     CPU核数+1，也可以大些但不要超过20，数据库加锁时连接过多性能下降
      maxActive: 20
      #     最大等待时间，内网：800，外网：1200（三次握手1s）
      maxWait: 60000
      timeBetweenEvictionRunsMillis: 60000
      #     配置一个连接在池中最大空间时间，单位是毫秒
      minEvictableIdleTimeMillis: 300000
      validationQuery: SELECT 1
      testWhileIdle: true
      #     设置从连接池获取连接时是否检查连接有效性，true检查，false不检查
      testOnBorrow: true
      #     设置从连接池归还连接时是否检查连接有效性，true检查，false不检查
      testOnReturn: true
      #     可以支持PSCache（提升写入、查询效率）
      poolPreparedStatements: true
      #   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
      #     保持长连接
      keepAlive: true
      maxPoolPreparedStatementPerConnectionSize: 20
      useGlobalDataSourceStat: true
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

• 添加配置类

    方式一

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;

@Configuration
public class DruidConfig{

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

    //配置Druid监控
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean bean=new ServletRegistrationBean(new StatViewServlet(),"/druid/*");

        Map initParams=new HashMap<>();
        initParams.put("loginUsername","admin");
        initParams.put("loginPassword","admin");
        initParams.put("allow","0.0.0.0");//默认允许所有访问

        bean.setInitParameters(initParams);
        return bean;
    }

    //配置一个web监控的filter
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean=new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());

        Map initParams=new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*");

        bean.setInitParameters(initParams);
        bean.setUrlPatterns(Arrays.asList("/*"));
        return bean;
    }
}

    方式二(最佳，注意：将yaml文件中的filters：stat)

import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
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.servlet.Filter;
import javax.servlet.Servlet;


@Configuration
public class DruidConfig {

    /**
     * 配置Druid 监控启动页面
     *
     * @return servletRegistrationBean
     */
    @Bean
    @ConditionalOnMissingBean
    public ServletRegistrationBean druidStartViewServlet() {
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        // 白名单
        servletRegistrationBean.addInitParameter("allow", "127.0.0.1");
        // 黑名单
        servletRegistrationBean.addInitParameter("deny", "192.168.1.100");
        // 登录查看信息的账密，用于登录Druid监控后台
        servletRegistrationBean.addInitParameter("loginUsername", "druid");
        servletRegistrationBean.addInitParameter("loginPassword", "druid");
        // 是否能够重置数据
        servletRegistrationBean.addInitParameter("resetEnable", "true");
        return servletRegistrationBean;
    }

    /**
     * Druid监控过滤器配置规则
     * ConditionalOnMissingBean 防止注册相同的bean
     *
     * @return filterFilterRegistrationBean
     */
    @Bean
    @ConditionalOnMissingBean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterFilterRegistrationBean = new FilterRegistrationBean<>();
        filterFilterRegistrationBean.setFilter(new WebStatFilter());
        // 添加过滤规则
        filterFilterRegistrationBean.addUrlPatterns("/*");
        // 添加不需要忽略的格式信息
        filterFilterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterFilterRegistrationBean;
    }
}