springcloud整合druid连接池或者HikariCP连接池

Druid连接池

1.添加配置

spring:
    # 数据库配置
    datasource:
      # 数据源
      type: ${db-type}
      driverClassName: ${db-driverClass}
      url: ${db-url}
      username: ${db-username}
      password: ${db-password}
#      自定义连接
#      type: com.alibaba.druid.pool.DruidDataSource
#      driverClassName: com.mysql.jdbc.Driver
#      url: jdbc:mysql://127.0.0.1:3306/dev_xinqiuboche_local2?autoReconnect=true&useUnicode=true&characterEncoding=UTF-8
#      password:
#      username: root

      # 连接池配置
      initialSize: ${db-initial-size}
      minIdle: ${db-min-idle}
      maxActive: ${db-max-active}
      # 连接等待超时时间
      maxWait: ${db-max-wait}
      # 配置隔多久进行一次检测(检测可以关闭的空闲连接)
      timeBetweenEvictionRunsMillis: ${db-time-between-eviction-runs-millis}
      minEvictableIdleTimeMillis: ${db-min-evictable-idle-time-millis}
      validationQuery: ${db-validation-query}
      testWhileIdle: ${db-test-while-idle}
      testOnBorrow: ${db-test-on-borrow}
      testOnReturn: ${db-test-on-return}
      # 打开PSCache，并且指定每个连接上PSCache的大小
      poolPreparedStatements: ${db-pool-prepared-statements}
      maxPoolPreparedStatementPerConnectionSize: ${db-max-pool-prepared-statement-per-connection-size}
      # 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: ${db-filters}
      # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
      connectionProperties: ${db-connection-properties}

2.Bean配置

import com.alibaba.druid.pool.DruidDataSource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import javax.sql.DataSource;
import java.sql.SQLException;

@Configuration
@Primary // 在同样的DataSource中，首先使用被标注的DataSource
@Slf4j
public class DruidDataSourceConfig extends DataSourceProperties {

    @org.springframework.beans.factory.annotation.Value("${spring.datasource.url}")
    private String dbUrl;

    @Value("${spring.datasource.username}")
    private String username;

    @Value("${spring.datasource.password}")
    private String password;

    @Value("${spring.datasource.driverClassName}")
    private String driverClassName;

    @Value("${spring.datasource.initialSize}")
    private int initialSize;

    @Value("${spring.datasource.minIdle}")
    private int minIdle;

    @Value("${spring.datasource.maxActive}")
    private int maxActive;

    @Value("${spring.datasource.maxWait}")
    private int maxWait;

    @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
    private int timeBetweenEvictionRunsMillis;

    @Value("${spring.datasource.minEvictableIdleTimeMillis}")
    private int minEvictableIdleTimeMillis;

    @Value("${spring.datasource.validationQuery}")
    private String validationQuery;

    @Value("${spring.datasource.testWhileIdle}")
    private boolean testWhileIdle;

    @Value("${spring.datasource.testOnBorrow}")
    private boolean testOnBorrow;

    @Value("${spring.datasource.testOnReturn}")
    private boolean testOnReturn;

    @Value("${spring.datasource.poolPreparedStatements}")
    private boolean poolPreparedStatements;

    @Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")
    private int maxPoolPreparedStatementPerConnectionSize;

    @Value("${spring.datasource.filters}")
    private String filters;

    @Value("{spring.datasource.connectionProperties}")
    private String connectionProperties;

    // 声明其为Bean实例
    @Bean
    public DataSource dataSource(){
        DruidDataSource datasource = new DruidDataSource();

        datasource.setUrl(this.dbUrl);
        datasource.setUsername(username);
        datasource.setPassword(password);
        datasource.setDriverClassName(driverClassName);

        // configuration
        datasource.setInitialSize(initialSize);
        datasource.setMinIdle(minIdle);
        datasource.setMaxActive(maxActive);
        datasource.setMaxWait(maxWait);
        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        datasource.setValidationQuery(validationQuery);
        datasource.setTestWhileIdle(testWhileIdle);
        datasource.setTestOnBorrow(testOnBorrow);
        datasource.setTestOnReturn(testOnReturn);
        datasource.setPoolPreparedStatements(poolPreparedStatements);
        datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
        try {
            datasource.setFilters(filters);
        } catch (SQLException e) {
            log.error("druid configuration initialization filter", e);
        }
        datasource.setConnectionProperties(connectionProperties);

        return datasource;
    }

}

HIkaciCP连接池

1.配置同上

2.添加依赖

 <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
            <!-- 排除tomcat jdbc -->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.tomcat</groupId>
                    <artifactId>tomcat-jdbc</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

<dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
            <version>2.7.4</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.39</version>
        </dependency>

3.Bean配置

@Bean(destroyMethod = "close")
public DataSource dataSource(){
    HikariConfig hikariConfig = new HikariConfig();
    hikariConfig.setDriverClassName("com.mysql.jdbc.Driver");
    hikariConfig.setJdbcUrl("jdbc:mysql://localhost:3306/spring-test"); 
    hikariConfig.setUsername("root");
    hikariConfig.setPassword("admin");

    hikariConfig.setMaximumPoolSize(5);
    hikariConfig.setConnectionTestQuery("SELECT 1");
    hikariConfig.setPoolName("springHikariCP");

    hikariConfig.addDataSourceProperty("dataSource.cachePrepStmts", "true");
    hikariConfig.addDataSourceProperty("dataSource.prepStmtCacheSize", "250");
    hikariConfig.addDataSourceProperty("dataSource.prepStmtCacheSqlLimit", "2048");
    hikariConfig.addDataSourceProperty("dataSource.useServerPrepStmts", "true");

    HikariDataSource dataSource = new HikariDataSource(hikariConfig);

    return dataSource;
}

HykariCP连接池github

https://github.com/brettwooldridge/HikariCP