SpringBoot整合Druid数据源「附源码」

整合druid数据源

1、引入 Maven 依赖

<dependencies>
        <!--引入druid数据源-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.21</version>
        </dependency>
    	<!--引入log4j-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
</dependencies>

2、指定 Druid 数据源

在「resources」根目录下新建 application.yml并编辑以下内容

#配置SpringBoot数据源
spring:
  datasource:
    #配置驱动名字（新版MySQL使用x.cj.x）
    driver-class-name: com.mysql.cj.jdbc.Driver
    #指定Druid数据源
    type: com.alibaba.druid.pool.DruidDataSource
    #配置url需要设置时区
    url: jdbc:mysql://localhost/jdbc?serverTimezone=UTC
    username: root
    password: 123456
    
    #Druid数据源其他配置
    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，去掉后监控界面sql无法统计，'wall'用于防火墙
    filters: stat,wall
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

3、配置 Druid

新建DruidConfig类，注意添加@Configuration注解

@Configuration
public class DruidConfig {
    //@ConfigurationProperties跟配置文件配置的属性绑定
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid() {
        return new DruidDataSource();
    }
    //配置Druid的监控
    //1、配置一个管理后台的Servlet
    @Bean
    public ServletRegistrationBean<StatViewServlet> statViewServlet() {
        ServletRegistrationBean<StatViewServlet> bean = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");
        /*初始化参数*/
        Map<String, String> initParams = new HashMap<>();
        //登录后台的用户名
        initParams.put("loginUsername", "admin");
        //登录后台的密码
        initParams.put("loginPassword", "123456");
        //允许谁访问,默认允许所以访问
        initParams.put("allow", "localhost");
        //拒绝谁访问
        initParams.put("deny", "");
        bean.setInitParameters(initParams);
        return bean;
    }

    //2、配置一个web监控的filter
    @Bean
    public FilterRegistrationBean<Filter> webStatFilter() {
        FilterRegistrationBean<Filter> bean = new FilterRegistrationBean<>();
        bean.setFilter(new WebStatFilter());
        /*初始化参数*/
        Map<String, String> initParams = new HashMap<>();
        //排除拦截以下请求
        initParams.put("exclusions","*.js,*.css,/druid/*");
        //拦截所有请求
        bean.setUrlPatterns(Arrays.asList("/*"));
        bean.setInitParameters(initParams);
        return bean;
    }