springboot 集成driud

news2024/11/29 11:30:44

druid官方文档

导入jar包

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>${druid-spring.version}</version>
</dependency>

配置数据源

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
    username: root
    password: 123456
    driver-class-name: com.mysql.cj.jdbc.Driver
    # 配置连接池
    druid:
      aop-patterns: com.wdz.boot.*  # 监控包路径下的bean
      filters: stat,wall,slf4 # 开启的功能：stat：sql监控，wall：防火墙,日志
      stat-view-servlet: # 配置架空页面功能
        enabled: true # 开启页面监控
        login-username: admin
        login-password: 123456
      web-stat-filter: # web监控、uri功能
        enabled: true
        url-pattern: /*
        exclusions: '*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*'

访问：http://localhost:8080/druid

这个配置默认是关闭的，在yml中开启

分析

由于jar包是 spring-boot-starter
所以springboot给druid有自动配置功能
找到druid的依赖

数据源主要配置类：DataSourceAutoConfiguration

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.druid.spring.boot.autoconfigure;

import javax.sql.DataSource;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.spring.boot.autoconfigure.properties.DruidStatProperties;
import com.alibaba.druid.spring.boot.autoconfigure.stat.DruidFilterConfiguration;
import com.alibaba.druid.spring.boot.autoconfigure.stat.DruidSpringAopConfiguration;
import com.alibaba.druid.spring.boot.autoconfigure.stat.DruidStatViewServletConfiguration;
import com.alibaba.druid.spring.boot.autoconfigure.stat.DruidWebStatFilterConfiguration;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
/**
 * @author lihengming [89921218@qq.com]
 */
@Configuration
@ConditionalOnClass(DruidDataSource.class)
@AutoConfigureBefore(DataSourceAutoConfiguration.class)
@EnableConfigurationProperties({DruidStatProperties.class, DataSourceProperties.class})
@Import({DruidSpringAopConfiguration.class,
    DruidStatViewServletConfiguration.class,
    DruidWebStatFilterConfiguration.class,
    DruidFilterConfiguration.class})
public class DruidDataSourceAutoConfigure

注解说明：
1、 @ConditionalOnClass(DruidDataSource.class)
当系统中存在DruidDataSource类的时候才会进行初始化配置，当引入druid的时候已经存在这个类，所以这个类自动配置
2、@AutoConfigureBefore(DataSourceAutoConfiguration.class)
在初始化化当前类之前加载DataSourceAutoConfiguration，在springboot官方的数据源加载之前加载

@Bean(initMethod = "init")
@ConditionalOnMissingBean // 容器中不存在当前bean的时候加载
public DataSource dataSource() {
    LOGGER.info("Init DruidDataSource");
    return new DruidDataSourceWrapper();
}
由于在官方之前加载数据源，所以spring容器中不存在DataSource数据源，然后加载druid的DataSource，以这个为主

3、 @EnableConfigurationProperties({DruidStatProperties.class, DataSourceProperties.class})
将 DruidStatProperties和DataSourceProperties 加入到容器中
4、 @Import({DruidSpringAopConfiguration.class,DruidStatViewServletConfiguration.class,DruidWebStatFilterConfiguration.class,DruidFilterConfiguration.class})
将druid监控页面用的其他配置加载进来
4.1： DruidSpringAopConfiguration是用来配置页面spring监控的
所有属性配置根是：
spring.datasource.druid.aop-patterns