Spring|Spring Boot 整合 Durid 数据库连接池 SpringBoot整合Durid数据库连接池

1.Druid简介 Druid是一个JDBC组件库，包括数据库连接池、SQL Parser等组件。DruidDataSource是最好的数据库连接池
2.maven引入druid

com.alibaba druid 1.1.9 mysql mysql-connector-java

3. application.properties 具体的配置文件详解可以参照DruidDataSource配置属性列表

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource spring.datasource.url=jdbc:mysql://127.0.0.1:3306/user?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC&autoReconnect=true spring.datasource.username=root spring.datasource.password=root spring.datasource.driverClassName=com.mysql.jdbc.Driver #dataSource Pool configuration spring.datasource.initialSize=5 #最小连接池数量 spring.datasource.minIdle=5 #最大连接池数量 spring.datasource.maxActive=20 #获取连接时最大等待时间，单位毫秒。配置了maxWait之后，缺省启用公平锁，并发效率会有所下#降，如果需要可以通过配置useUnfairLock属性为true使用非公平锁。 spring.datasource.maxWait=60000 spring.datasource.timeBetweenEvictionRunsMillis=60000 spring.datasource.minEvictableIdleTimeMillis=300000 spring.datasource.validationQuery=SELECT 1 FROM DUAL spring.datasource.testWhileIdle=true spring.datasource.testOnBorrow=false spring.datasource.druid.exceptionSorter=true spring.datasource.testOnReturn=false spring.datasource.poolPreparedStatements=true spring.datasource.druid.filters=stat,wall spring.datasource.maxPoolPreparedStatementPerConnectionSize=20 # 慢SQL spring.datasource.connectionProperties=druid.stat.mergeSql=true; druid.stat.slowSqlMillis=500 spring.datasource.useGlobalDataSourceStat=true

4.配置 Durid dataSource

/** * dataSource 数据源配置 */ @Configuration @Data public class DruidDataSourceConfiguration {@Value("${spring.datasource.druid.filters}") private String filters ; @Value("${spring.datasource.druid.exceptionSorter}") private String exceptionSorter; /** * @see org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration.Tomcat 仿写的你可以去了解 * @return DruidDataSource */ @Bean @ConfigurationProperties(prefix = "spring.datasource") public DruidDataSource dataSource() {DruidDataSource dataSource = new DruidDataSource(); try { System.out.println(filters); dataSource.setFilters(filters); dataSource.setExceptionSorter(exceptionSorter); } catch (SQLException e) { e.printStackTrace(); } return dataSource; } }

5. 配置DruidStatFilter Druid的监控统计功能是通过filter-chain扩展实现，如果你要打开监控统计功能，配置StatFilter

import com.alibaba.druid.support.http.WebStatFilter; import javax.servlet.annotation.WebFilter; import javax.servlet.annotation.WebInitParam; /** 打开监控统计功能 */ @WebFilter(filterName="druidWebStatFilter",urlPatterns="/*", initParams={ @WebInitParam(name="exclusions",value="https://www.it610.com/article/*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*")//忽略资源 } ) public class DruidStatFilter extends WebStatFilter { }

6. 配置DruidStatViewServlet 【Spring|Spring Boot 整合 Durid 数据库连接池】启用Druid的内置监控页面

import com.alibaba.druid.support.http.StatViewServlet; import javax.servlet.annotation.WebInitParam; import javax.servlet.annotation.WebServlet; /** * @author hu * Created by hu on 2018/2/27. */ //urlPatterns指定监控页面url @WebServlet(urlPatterns="/druid/*", initParams={ @WebInitParam(name="allow",value="https://www.it610.com/article/192.168.33.108,127.0.0.1"),// IP白名单(没有配置或者为空，则允许所有访问) @WebInitParam(name="deny",value="https://www.it610.com/article/192.168.1.73"),// IP黑名单 (存在共同时，deny优先于allow) @WebInitParam(name="loginUsername",value="https://www.it610.com/article/admin"),// 用户名 @WebInitParam(name="loginPassword",value="https://www.it610.com/article/123456"),// 密码 @WebInitParam(name="resetEnable",value="https://www.it610.com/article/true")// 禁用HTML页面上的“Reset All”功能 } ) public class DruidStatViewServlet extends StatViewServlet { }

7. 添加@ServletComponentScan注解需要在spring boot 启动类上面添加@ServletComponentScan,否则监控页面的servlet 不会被加载。

import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan; import org.springframework.data.jpa.repository.config.EnableJpaRepositories; /** * @author hu * @date 2018/5/9 17:25 */ @ServletComponentScan @SpringBootApplication @EnableJpaRepositories(basePackages = "com.dream.repository") public class DreamApplication { public static void main(String[] args) throws Exception { SpringApplication.run(DreamApplication.class, args); } }

8. 访问监控页面