SpringBoot 1.x版本默认使用的的tomcat的jdbc连接池。前期快速开发并没有采用更好的连接池。由于jdbc性能,稳定性,监控能力都不如druid连接池,所以将连接池更改为druid连接池。不过在SpringBoot 2.x版本后 默认连接池已经替换成了HikariCP,由于HikariCP性能强、速度快、口碑好、代码少和稳定,暂时不推荐替换成成其他连接池。
com.alibaba
druid
1.1.5
在application.properties配置文件中加入druid配置
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql://localhost:3306?allowMultiQueries=true&autoReconnect=true
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driverClassName=com.mysql.jdbc.Driver
#dataSource Pool configuration
# 初始化大小
spring.datasource.initialSize=5
# 最小
spring.datasource.minIdle=5
# 最大
spring.datasource.maxActive=20
# 配置获取连接等待超时的时间
spring.datasource.maxWait=60000
# 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
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间,单位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
# 校验SQL,Oracle配置 spring.datasource.validationQuery=SELECT 1 FROM DUAL,如果不配validationQuery项,则下面三项配置无用
spring.datasource.validationQuery=SELECT 'x'
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 打开PSCache,并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# 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
spring.datasource.filters=stat,wall,log4j
# 通过connectProperties属性来打开mergeSql功能;慢SQL记录
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多个DruidDataSource的监控数据
spring.datasource.useGlobalDataSourceStat=true
package com.example.durid.filter;
import com.alibaba.druid.support.http.WebStatFilter;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
/**
* 配置监控拦截器
* druid监控拦截器
* @ClassName: DruidStatFilter
* @author 16437
* @date 2018年6月4日 20:53:07
*/
@WebFilter(filterName = "druidWebStatFilter",
urlPatterns = "/*",
initParams =
// 忽略资源
{ @WebInitParam(name = "exclusions", value = "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*")}
)
public class DruidStatFilter extends WebStatFilter {
}
package com.example.durid.base;
import com.alibaba.druid.support.http.StatViewServlet;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
/**
* druid监控视图配置
* @ClassName: DruidStatViewServlet
* @author 16437
* @date 2018年6月5日 20:58:22
*/
@WebServlet(urlPatterns = "/druid/*", initParams={
@WebInitParam(name="allow",value=""),// IP白名单 (没有配置或者为空,则允许所有访问)
@WebInitParam(name="deny",value="192.168.16.111"),// IP黑名单 (存在共同时,deny优先于allow)
@WebInitParam(name="loginUsername",value="admin"),// 用户名
@WebInitParam(name="loginPassword",value="admin"),// 密码
@WebInitParam(name="resetEnable",value="true")// 禁用HTML页面上的“Reset All”功能
})
public class DruidStatViewServlet extends StatViewServlet {
}
注意要启动类中加上@ServletComponentScan注解,否则Servlet无法生效 。
package com.example.durid;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
@SpringBootApplication
@ServletComponentScan
public class DuridApplication {
public static void main(String[] args) {
SpringApplication.run(DuridApplication.class, args);
}
}
有些版本存在自动初始化数据,SQL监控显示不出任何的内容问题,如果版本不存在bug可以跳过这一步。
package com.example.durid;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import java.sql.SQLException;
@Configuration
public class DruidConfiguration {
@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;
@Value("${spring.datasource.useGlobalDataSourceStat}")
private boolean useGlobalDataSourceStat;
@Bean //声明其为Bean实例
@Primary //在同样的DataSource中,首先使用被标注的DataSource
public DruidDataSource 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);
datasource.setUseGlobalDataSourceStat(useGlobalDataSourceStat);
try {
datasource.setFilters(filters);
} catch (SQLException e) {
System.err.println("druid configuration initialization filter: "+ e);
}
datasource.setConnectionProperties(connectionProperties);
return datasource;
}
}
在浏览器中输入http://localhost:8080/druid/login.html登陆
这样就已经配置好了。
参考:https://github.com/alibaba/druid