SpringBoot - 整合默认Jdbc与Druid

1.整合JDBC

导入依赖

pom.xml

        <!--开启SpringBootJdbc，默认为HikariDataSource源-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--mysql 依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.20</version>
        </dependency>

编写配置文件

application.yaml

#jdbc 连接信息
spring:
  datasource:
    url: jdbc:mysql://localhost:3306/learn?serverTimezone=UTC
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver

 

2.整合druid

导入依赖

pom.xml

        <!--开启SpringBoot jdbc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--mysql 依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.20</version>
        </dependency>
        <!--druid 数据源-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.8</version>
        </dependency>

配置文件

application.yaml

spring:
  datasource:
    #数据源基本配置
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/learn
    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

编写配置类

com.levi.springboot_learn.config.DruidConfig

@Configuration
public class DruidConfig{

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

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

        Map<String,String> 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
    //FilterRegistrationBean替代web.xml配置Filter(过滤器)
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean=new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());

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

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

 

测试