springboot整合druid数据库连接池

1.pom.xml添加如下依赖

        <!-- Druid连接池包 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>

2.application.properties添加druid配置

server.port=8080
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/data?characterEncoding=UTF-8
spring.datasource.username=root #注意更改数据库，用户名，密码
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver


######################### Druid#################
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.druid.initial-size=5
spring.datasource.druid.min-idle=5
spring.datasource.druid.max-active=20
spring.datasource.druid.max-wait=60000
spring.datasource.druid.time-between-eviction-runs-millis=60000
spring.datasource.druid.min-evictable-idle-time-millis=300000
spring.datasource.druid.validation-query=SELECT 'x'
spring.datasource.druid.test-while-idle=true
spring.datasource.druid.test-on-borrow=false
spring.datasource.druid.test-on-return=false
spring.datasource.druid.pool-prepared-statements=false
spring.datasource.druid.max-pool-prepared-statement-per-connection-size=-1
spring.datasource.druid.filters=stat,wall,log4j

3.新建Druid配置类DruidDataSourceConfig.java

/**
 * Describe: Druid 数据库连接池配置
 */
@Configuration
@ConditionalOnClass(com.alibaba.druid.pool.DruidDataSource.class)
@ConditionalOnProperty(name = "spring.dataSource.type", havingValue = "com.alibaba.druid.pool.DruidDataSource", matchIfMissing = true)
public class DruidDataSourceConfig {

    private Logger logger = LoggerFactory.getLogger(DruidDataSourceConfig.class);

    @Bean(name = "druidDataSource")
    @Primary
    public DataSource dataSource(@Autowired Environment environment){
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setUrl(environment.getProperty("spring.datasource.url"));
        dataSource.setUsername(environment.getProperty("spring.datasource.username"));
        dataSource.setPassword(environment.getProperty("spring.datasource.password"));
        dataSource.setDriverClassName(environment.getProperty("spring.datasource.driverClassName"));

        dataSource.setInitialSize(Integer.parseInt(environment.getProperty("spring.datasource.druid.initial-size")));
        dataSource.setMinIdle(Integer.parseInt(environment.getProperty("spring.datasource.druid.min-idle")));
        dataSource.setMaxActive(Integer.parseInt(environment.getProperty("spring.datasource.druid.max-active")));
        // 配置获取连接等待超时的时间
        dataSource.setMaxWait(Long.parseLong(environment.getProperty("spring.datasource.druid.max-wait")));
        // 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
        dataSource.setTimeBetweenEvictionRunsMillis(Long.parseLong(environment.getProperty("spring.datasource.druid.time-between-eviction-runs-millis")));
        // 配置一个连接在池中最小生存的时间，单位是毫秒
        dataSource.setMinEvictableIdleTimeMillis(Long.parseLong(environment.getProperty("spring.datasource.druid.min-evictable-idle-time-millis")));
        dataSource.setValidationQuery(environment.getProperty("spring.datasource.druid.validation-query"));
        dataSource.setTestWhileIdle(Boolean.parseBoolean(environment.getProperty("spring.datasource.druid.test-while-idle")));
        dataSource.setTestOnBorrow(Boolean.parseBoolean(environment.getProperty("spring.datasource.druid.test-on-borrow")));
        dataSource.setTestOnReturn(Boolean.parseBoolean(environment.getProperty("spring.datasource.druid.test-on-return")));
        dataSource.setPoolPreparedStatements(Boolean.parseBoolean(environment.getProperty("spring.datasource.druid.pool-prepared-statements")));
        dataSource.setMaxPoolPreparedStatementPerConnectionSize(Integer.parseInt(environment.getProperty("spring.datasource.druid.max-pool-prepared-statement-per-connection-size")));
        try {
            dataSource.setFilters(environment.getProperty("spring.datasource.druid.filters"));
        } catch (SQLException e) {
            logger.error("druid configuration initialization filter", e);
        }
        return dataSource;
    }

    /**
     * 配置Druid监控的StatViewServlet和WebStatFilter
     */
    @Bean
    public ServletRegistrationBean druidServlet(){
        logger.info("init Druid Servlet Configuration ");
      ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean();
      servletRegistrationBean.setServlet(new StatViewServlet());
      servletRegistrationBean.addUrlMappings("/druid/*");
      Map<String, String> initParameters = new HashMap<String, String>();
      initParameters.put("loginUsername", "admin");
      initParameters.put("loginPassword", "admin");
      initParameters.put("resetEnable", "true");
        //下面是黑白名单，多个ip地址之间用逗号隔开
//      initParameters.put("allow", "白名单ip");
//      initParameters.put("deny", "黑名单ip");
      servletRegistrationBean.setInitParameters(initParameters);

      return servletRegistrationBean;
    }

    @Bean
    public FilterRegistrationBean filterRegistrationBean(){
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
      filterRegistrationBean.setFilter(new WebStatFilter());
      filterRegistrationBean.addUrlPatterns("/*");
      filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
      return filterRegistrationBean;
    }

}

以上代码可直接使用，注意将properties中的数据库相关信息进行修改

如何检测是否配置成功，参考下面这篇博客：
https://blog.csdn.net/qq_44625080/article/details/104060363

来源：CSDN

作者：LinKing06

链接：https://blog.csdn.net/qq_44625080/article/details/104060210