Druid是阿里巴巴開源平臺上一個數據庫連接池實現,它結合了C3P0、DBCP、PROXOOL等DB池的優點,同時加入了日誌監控,可以很好的監控DB池連接和SQL的執行情況,可以說是針對監控而生的DB連接池(據說是目前最好的連接池)
一、依賴
爲了測試,使用jdbcTemplate
<!-- jdbcTemplate -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- druid數據庫連接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.26</version>
</dependency>
<!-- mysql connector -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
二、Druid配置
druid.properties
#數據庫設置
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/uu_core?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=true
spring.datasource.username=root
spring.datasource.password=root
#--------------------------
# 下面爲連接池的補充設置,應用到上面所有數據源中
# 初始化大小,最小,最大
spring.datasource.initialSize=5
spring.datasource.minIdle=1
spring.datasource.maxActive=50
# 配置獲取連接等待超時的時間
spring.datasource.maxWait=60000
# 配置間隔多久才進行一次檢測,檢測需要關閉的空閒連接,單位是毫秒
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一個連接在池中最小生存的時間,單位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 打開PSCache,並且指定每個連接上PSCache的大小
spring.datasource.poolPreparedStatements=false
#spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# 配置監控統計攔截的filters,去掉後監控界面sql無法統計,'wall'用於防火牆
spring.datasource.filters=stat,wall,log4j
# 通過connectProperties屬性來打開mergeSql功能;慢SQL記錄
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合併多個DruidDataSource的監控數據
#spring.datasource.useGlobalDataSourceStat=true
三、實例化Druid Datasource
package cn.aduu.config;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import javax.sql.DataSource;
/**
* @author zh
* @ClassName cn.aduu.config.DruidConfiguration
* @Description
*/
@Configuration
@PropertySource(value = "classpath:druid.properties")
public class DruidConfiguration {
@Bean(destroyMethod = "close", initMethod = "init")
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource druidDataSource() {
DruidDataSource druidDataSource = new DruidDataSource();
return druidDataSource;
}
/**
* 註冊一個StatViewServlet
* @return
*/
@Bean
public ServletRegistrationBean druidStatViewServlet(){
//org.springframework.boot.context.embedded.ServletRegistrationBean提供類的進行註冊.
ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
//添加初始化參數:initParams
//白名單:
servletRegistrationBean.addInitParameter("allow","127.0.0.1");
//IP黑名單 (存在共同時,deny優先於allow) : 如果滿足deny的話提示:Sorry, you are not permitted to view this page.
servletRegistrationBean.addInitParameter("deny","192.168.1.73");
//登錄查看信息的賬號密碼.
servletRegistrationBean.addInitParameter("loginUsername","admin");
servletRegistrationBean.addInitParameter("loginPassword","123456");
//是否能夠重置數據.
servletRegistrationBean.addInitParameter("resetEnable","false");
return servletRegistrationBean;
}
/**
* 註冊一個:filterRegistrationBean
* @return
*/
@Bean
public FilterRegistrationBean druidStatFilter(){
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
//添加過濾規則.
filterRegistrationBean.addUrlPatterns("/*");
//添加不需要忽略的格式信息.
filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
return filterRegistrationBean;
}
}
四、監控
訪問 http://localhost:8080/druid, 使用上面配置的賬號密碼。
五、測試
@RestController
public class HelloController{
private static final Logger logger = LoggerFactory.getLogger(HelloController.class);
@Autowired
private JdbcTemplate jdbcTemplate;
@RequestMapping("hello")
public List<Map<String, Object>> hello() {
List<Map<String, Object>> list = jdbcTemplate.queryForList("SELECT user,password FROM mysql.user ", new Object[]{});
return list;
}
}
訪問localhost:8080/hello
[
{
"user": "root",
"password": "*81F5E21E35407D884A6CD4A731AEBFB6AF209E1B"
},
{
"user": "root",
"password": "*81F5E21E35407D884A6CD4A731AEBFB6AF209E1B"
}
]