Spring Boot 使用Druid详解

程序员文章站 2024-02-18 11:55:46

druid是java语言中最好的数据库连接池，并且能够提供强大的监控和扩展功能，下面来说明如何在 springboot 中配置使用druid。步骤： 1. 在pom....

druid是java语言中最好的数据库连接池，并且能够提供强大的监控和扩展功能，下面来说明如何在 springboot 中配置使用druid。
步骤：

1. 在pom.xml中加载依赖

2. 在application.properties中加入数据源配置

3. 编写druidconfiguration，通过@bean注解的方式注入druid servlet和filter，以便提供监控页面访问

4. 浏览器访问

一、在pom.xml中加入依赖

<dependency> 
      <groupid>com.alibaba</groupid> 
      <artifactid>druid</artifactid> 
      <version>1.0.18</version> 
  </dependency>

二、在application.properties中加入数据源配置

################## server ################################ 
server.port=8080 
 
################## datasource ################################ 
spring.datasource.url = jdbc:mysql://localhost:3306/spring 
spring.datasource.username = root 
spring.datasource.password = 123456 
spring.datasource.driverclassname = com.mysql.jdbc.driver 
 
#使用druid数据源 
spring.datasource.type=com.alibaba.druid.pool.druiddatasource 
# 下面为连接池的补充设置，应用到上面所有数据源中 
 
# 初始化大小，最小，最大 
spring.datasource.initialsize=5 
spring.datasource.minidle=5 
spring.datasource.maxactive=20 
 
# 配置获取连接等待超时的时间 
spring.datasource.maxwait=60000 
 
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 
spring.datasource.timebetweenevictionrunsmillis=60000 
 
# 配置一个连接在池中最小生存的时间，单位是毫秒 
spring.datasource.minevictableidletimemillis=300000 
spring.datasource.validationquery=select 1 fromdual 
spring.datasource.testwhileidle=true 
spring.datasource.testonborrow=false 
spring.datasource.testonreturn=false 
 
# 打开pscache，并且指定每个连接上pscache的大小 
spring.datasource.poolpreparedstatements=true 
spring.datasource.maxpoolpreparedstatementperconnectionsize=20 
 
# 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 
spring.datasource.filters=stat,wall,log4j 
 
# 通过connectproperties属性来打开mergesql功能；慢sql记录 
spring.datasource.connectionproperties=druid.stat.mergesql=true;druid.stat.slowsqlmillis=5000 
 
# 合并多个druiddatasource的监控数据 
#spring.datasource.useglobaldatasourcestat=true 
 
 
################ java persistence api ########################### 
# specify the dbms 
spring.jpa.database = mysql 
# show or not log for each sql query 
spring.jpa.show-sql = true 
# hibernate ddl auto (create, create-drop, update) 
spring.jpa.hibernate.ddl-auto = update 
#[org.hibernate.cfg.improvednamingstrategy #org.hibernate.cfg.defaultnamingstrategy] 
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.improvednamingstrategy 
# stripped before adding them to the entity manager) 
spring.jpa.properties.hibernate.dialect= org.hibernate.dialect.mysql5dialect 
 
#暂时不用redis，所以none，spring.session.store-type=reids 
spring.session.store-type=none

以上是我项目中的配置信息，大家只要关注datasource部分即可。

三、编写druidconfiguration配置类，通过@bean注解的方式注入druid servlet和filter，以便提供监控页面访问

package com.example.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 com.alibaba.druid.pool.druiddatasource; 
import com.alibaba.druid.support.http.statviewservlet; 
import com.alibaba.druid.support.http.webstatfilter; 
 
/** 
 * 配置druid数据源 
 * 
 */ 
@configuration 
public class druidconfiguration { 
   
  private logger logger = loggerfactory.getlogger(druidconfiguration.class); 
 
  @bean 
  public servletregistrationbean druidstatviewservlet() { 
    servletregistrationbean registrationbean = new servletregistrationbean(new statviewservlet(), "/druid/*"); 
    registrationbean.addinitparameter("allow", "127.0.0.1"); 
    registrationbean.addinitparameter("deny", "192.168.31.234"); 
    registrationbean.addinitparameter("loginusername", "admin"); 
    registrationbean.addinitparameter("loginpassword", "123456"); 
    registrationbean.addinitparameter("resetenable", "false"); 
 
    return registrationbean; 
  } 
 
  @bean 
  public filterregistrationbean druidwebstatviewfilter() { 
    filterregistrationbean registrationbean = new filterregistrationbean(new webstatfilter()); 
    registrationbean.addinitparameter("urlpatterns", "/*"); 
    registrationbean.addinitparameter("exclusions", "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*"); 
 
    return registrationbean; 
 
  } 
 
  @bean 
  public datasource druiddatasource(@value("${spring.datasource.url}") string url, 
      @value("${spring.datasource.driverclassname}") string driver, 
      @value("${spring.datasource.username}") string username, 
      @value("${spring.datasource.password}") string password, 
      @value("${spring.datasource.maxactive}") int maxactive, 
      @value("${spring.datasource.filters}") string filters, 
      @value("${spring.datasource.initialsize}") 
      int initialsize, 
      @value("${spring.datasource.minidle}") 
      int minidle, 
      @value("${spring.datasource.maxwait}") 
      int maxwait, 
      @value("${spring.datasource.timebetweenevictionrunsmillis}") 
      int timebetweenevictionrunsmillis, 
      @value("${spring.datasource.minevictableidletimemillis}") 
      int minevictableidletimemillis, 
      @value("${spring.datasource.validationquery}") 
      string validationquery, 
      @value("${spring.datasource.testwhileidle}") 
      boolean testwhileidle, 
      @value("${spring.datasource.testonborrow}") 
      boolean testonborrow, 
      @value("${spring.datasource.testonreturn}") 
      boolean testonreturn, 
      @value("${spring.datasource.poolpreparedstatements}") 
      boolean poolpreparedstatements, 
      @value("${spring.datasource.maxpoolpreparedstatementperconnectionsize}") 
      int maxpoolpreparedstatementperconnectionsize, 
      @value("${spring.datasource.connectionproperties}") 
      string connectionproperties, 
      @value("${spring.datasource.useglobaldatasourcestat}") 
      boolean useglobaldatasourcestat 
 
  ) { 
    druiddatasource datasource = new druiddatasource(); 
    /*数据源主要配置*/ 
    datasource.seturl(url); 
    datasource.setdriverclassname(driver); 
    datasource.setusername(username); 
    datasource.setpassword(password); 
     
    /*数据源补充配置*/ 
    datasource.setmaxactive(maxactive); 
    datasource.setinitialsize(initialsize); 
    datasource.setminidle(minidle); 
    datasource.setmaxwait(maxwait); 
    datasource.settimebetweenevictionrunsmillis(timebetweenevictionrunsmillis); 
    datasource.setminevictableidletimemillis(minevictableidletimemillis); 
    datasource.setvalidationquery(validationquery); 
    datasource.settestonborrow(testonborrow); 
    datasource.settestonreturn(testonreturn); 
    datasource.settestwhileidle(testwhileidle); 
    datasource.setpoolpreparedstatements(poolpreparedstatements); 
    datasource.setmaxpoolpreparedstatementperconnectionsize(maxpoolpreparedstatementperconnectionsize); 
    datasource.setconnectionproperties(connectionproperties); 
    datasource.setuseglobaldatasourcestat(useglobaldatasourcestat); 
     
    try { 
      datasource.setfilters(filters); 
      logger.info("druid数据源初始化设置成功......"); 
    } catch (sqlexception e) { 
      e.printstacktrace(); 
      logger.info("druid数据源filters设置失败......"); 
    } 
    return datasource; 
 
  } 
}

四、浏览器访问

在浏览器中输入http://localhost:8080/druid/index.html，首次访问需要使用账号和密码登录

Spring Boot 使用Druid详解