Spring Boot 使用Druid详解 - 快网idc优惠网

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

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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

在数据源一栏中，所有加"*"标识的都不能为空，，尤其是filter类名，否则会看不到sql监控数据。

五、查看sql监控

执行删除某条记录后，查看sql监控

到这里，我们就把druid配置成功了。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持快网idc。

原文链接：http://blog.csdn.net/linabc123000/article/details/69062204

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