Druid和Druid Spring Boot Starter在SpringBoot下的使用

一、认识Druid和Druid Spring Boot Starter

1.1认识Druid

Druid是Java语言中最好的数据库连接池。Druid能够提供强大的监控和扩展功能。DruidDataSource支持的数据库：
理论上说，支持所有有jdbc驱动的数据库。

1.2认识Druid Spring Boot Starter

Spring Boot with Druid support,help you simplify Druid config in Spring Boot.

Druid Spring Boot Starter 用于帮助你在Spring Boot项目中轻松集成Druid数据库连接池和监控。

 

二、Druid在SpringBoot下的使用

2.1导入依赖

<!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.8</version>
</dependency>

2.2编写application.yml

spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    #Spring Boot 默认是不注入这些属性值的，需要自己绑定
    #druid 数据源专有配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true

    #配置监控统计拦截的filters，stat:监控统计、log4j：日志记录、wall：防御sql注入
    #如果允许时报错  java.lang.ClassNotFoundException: org.apache.log4j.Priority
    #则导入 log4j 依赖即可，Maven 地址：https://mvnrepository.com/artifact/log4j/log4j
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

 

 2.3配置类编写

@Configuration
public class DruidConfig {

    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druidDataSource(){
        return new DruidDataSource();
    }
    //后台监控
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean<StatViewServlet> bean = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");
        //后台登陆,设置密码账号配置
        HashMap<String,String> initParameters =new HashMap<>();
        //增加配置
        initParameters.put("loginUsername","admin");
        initParameters.put("loginPassword","123456");
        //允许谁可以访问
        initParameters.put("allow","");
        //禁止谁访问initParameters.put("cyfe","192.168.23.113");

        bean.setInitParameters(initParameters);//设置初始化参数
        return bean;
    }

    //filter过滤器
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());
        //过滤请求
        HashMap<String,String> initParameters =new HashMap<>();
        initParameters.put("exclusions","*.js,*.css,*.img,/druid/*");
        bean.setInitParameters(initParameters);
        return bean;
    }
}

2.4访问：http://localhost:8080/druid/

 

 

 

三、Druid Spring Boot Starter在SpringBoot下的使用

 3.1导入依赖

<!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.2.8</version>
</dependency>

 

3.2.1编写application.yml

spring:
  application:
    name: springboot-test-exam1
  datasource:
    # 使用阿里的Druid连接池
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    # 填写你数据库的url、登录名、密码和数据库名
    url: jdbc:mysql://localhost:3306/databaseName?useSSL=false&characterEncoding=utf8
    username: root
    password: root
    druid:
      # 连接池的配置信息
      # 初始化大小，最小，最大
      initial-size: 5
      min-idle: 5
      maxActive: 20
      # 配置获取连接等待超时的时间
      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
      timeBetweenEvictionRunsMillis: 60000
      # 配置一个连接在池中最小生存的时间，单位是毫秒
      minEvictableIdleTimeMillis: 300000
      validationQuery: SELECT 1
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      # 打开PSCache，并且指定每个连接上PSCache的大小
      poolPreparedStatements: true
      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
      filters: stat,wall,slf4j
      # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
      connectionProperties: druid.stat.mergeSql\=true;druid.stat.slowSqlMillis\=5000
      # 配置DruidStatFilter
      web-stat-filter:
        enabled: true
        url-pattern: "/*"
        exclusions: "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*"
      # 配置DruidStatViewServlet
      stat-view-servlet:
        url-pattern: "/druid/*"
        # IP白名单(没有配置或者为空，则允许所有访问)
        allow: 127.0.0.1,192.168.163.1
        # IP黑名单 (存在共同时，deny优先于allow)
        deny: 192.168.1.73
        #  禁用HTML页面上的“Reset All”功能
        reset-enable: false
        # 登录名
        login-username: admin
        # 登录密码
        login-password: 123456

3.2.2或者也可以使用application.properties

server.port=8080
 
spring.application.name=springboot-test-exam1
 
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/databaseName?useSSL=false&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.druid.initial-size=5
spring.datasource.druid.min-idle=5
spring.datasource.druid.maxActive=20
spring.datasource.druid.maxWait=60000
spring.datasource.druid.timeBetweenEvictionRunsMillis=60000
spring.datasource.druid.minEvictableIdleTimeMillis=300000
spring.datasource.druid.validationQuery=SELECT 1 FROM DUAL
spring.datasource.druid.testWhileIdle=true
spring.datasource.druid.testOnBorrow=false
spring.datasource.druid.testOnReturn=false
spring.datasource.druid.poolPreparedStatements=true
spring.datasource.druid.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.druid.filters=stat,wall,slf4j
spring.datasource.druid.connectionProperties=druid.stat.mergeSql\=true;druid.stat.slowSqlMillis\=5000
spring.datasource.druid.web-stat-filter.enabled=true
spring.datasource.druid.web-stat-filter.url-pattern=/*
spring.datasource.druid.web-stat-filter.exclusions=*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*
spring.datasource.druid.stat-view-servlet.url-pattern=/druid/*
spring.datasource.druid.stat-view-servlet.allow=127.0.0.1,192.168.163.1
spring.datasource.druid.stat-view-servlet.deny=192.168.1.73
spring.datasource.druid.stat-view-servlet.reset-enable=false
spring.datasource.druid.stat-view-servlet.login-username=admin
spring.datasource.druid.stat-view-servlet.login-password=123456

 

3.3访问：http://localhost:8080/druid