1.引入druid连接池
<!-- Druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.28</version>
</dependency>
2.配置文件中：（我这里是ssm的配置）
<!-- 配置数据源ORACLE 数据库 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!-- 初始化连接大小 -->
<property name="initialSize" value="${jdbc.initialSize}"/>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${jdbc.maxActive}"/>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${jdbc.minIdle}"/>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${jdbc.maxWait}"/>
<!-- 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 -->
<property name="timeBetweenEvictionRunsMillis" value="60000"/>
<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="300000"/>
<!-- 用来检测连接是否有效的sql，要求是一个查询语句-->
<property name="validationQuery" value="select 'x' FROM DUAL"/>
<!-- 申请连接时执行validationQuery检测连接是否有效，配置为true会降低性能 -->
<property name="testWhileIdle" value="true"/>
<property name="testOnBorrow" value="false"/>
<!-- 归还连接时执行validationQuery检测连接是否有效，配置为true会降低性能 -->
<property name="testOnReturn" value="false"/>
<!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
<property name="poolPreparedStatements" value="true"/>
<property name="maxPoolPreparedStatementPerConnectionSize" value="20"/>
<!--配置监控统计拦截的filters，属性类型是字符串，通过别名的方式配置扩展插件，常用的插件有：监控统计用的filter:stat；日志用的filter:log4j；防御SQL注入的filter:wall -->
<property name="filters" value="stat,wall,slf4j"/>
<!-- 通过connectProperties属性来打开mergeSql功能；慢SQL记录-->
<property name="connectionProperties" value="druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000" />
<!-- 关闭abanded连接时输出错误日志 -->
<property name="logAbandoned" value="true"/>
</bean>
3.web.xml配置：
<!-- 添加druid监控-->
<servlet>
<servlet-name>DruidStatView</servlet-name>
<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DruidStatView</servlet-name>
<url-pattern>/druid/*</url-pattern>
</servlet-mapping>
<!-- 添加Web应用等监控 -->
<filter>
<filter-name>DruidWebStatFilter</filter-name>
<filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>
<init-param>
<param-name>exclusions</param-name>
<param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value>
</init-param>
<init-param>
<param-name>profileEnable</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>principalCookieName</param-name>
<param-value>USER_COOKIE</param-value>
</init-param>
<init-param>
<param-name>principalSessionName</param-name>
<param-value>USER_SESSION</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>DruidWebStatFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
访问地址：localhost/项目名/druid
spring boot 配置：
1.yml配置：
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driverClassName: com.mysql.jdbc.Driver
url: xxx
username: xx
password: xx
initialSize: 10
minIdle: 10
maxActive: 200
# 配置获取连接等待超时的时间
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
timeBetweenEvictionRunsMillis: 60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
minEvictableIdleTimeMillis: 30000
validationQuery: select 'x'
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
# 打开PSCache，并且指定每个连接上PSCache的大小
poolPreparedStatements: true
maxPoolPreparedStatementPerConnectionSize: 20
# 配置监控统计拦截的filters
filters: stat,wall,slf4j
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
2.spring boot大多于基于注解的配置，如果是web.xml配置，按上面的配置：
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
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.Primary;
import javax.sql.DataSource;
import java.sql.SQLException;
/**
* druid数据源状态监控
*
* @author huyw
* @date 2018/11/12
*/
@Configuration
public class DruidDBConfig {
private Logger logger = LoggerFactory.getLogger(DruidDBConfig.class);
@Value("${spring.datasource.url}")
private String dbUrl;
@Value("${spring.datasource.username}")
private String username;
@Value("${spring.datasource.password}")
private String password;
@Value("${spring.datasource.driver-class-name}")
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;
@Bean(initMethod = "init", destroyMethod = "close") //声明其为Bean实例
@Primary //在同样的DataSource中，首先使用被标注的DataSource
public DataSource dataSource() {
DruidDataSource datasource = new DruidDataSource();
datasource.setUrl(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) {
logger.error("druid configuration initialization filter", e);
}
datasource.setConnectionProperties(connectionProperties);
return datasource;
}
/**
* 注册一个StatViewServlet
*
* @return
*/
@Bean
public ServletRegistrationBean druidServlet() {
ServletRegistrationBean reg = new ServletRegistrationBean();
reg.setServlet(new StatViewServlet());
reg.addUrlMappings(new String[]{"/druid/*"});
//IP白名单 (没有配置或者为空，则允许所有访问)
reg.addInitParameter("allow", "");
//是否能够重置数据
reg.addInitParameter("resetEnable", "false");
//设置账号密码
reg.addInitParameter("loginUsername", "admin");
reg.addInitParameter("loginPassword", "123456");
return reg;
}
/**
* 注册一个：filterRegistrationBean
*
* @return
*/
@Bean
public FilterRegistrationBean filterRegistrationBean() {
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
filterRegistrationBean.setFilter(new WebStatFilter());
//添加过滤规则
filterRegistrationBean.addUrlPatterns(new String[]{"/*"});
//添加不需要忽略的格式信息
filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
filterRegistrationBean.addInitParameter("profileEnable", "true");
filterRegistrationBean.addInitParameter("principalCookieName", "USER_COOKIE");
filterRegistrationBean.addInitParameter("principalSessionName", "USER_SESSION");
filterRegistrationBean.addInitParameter("DruidWebStatFilter", "/*");
return filterRegistrationBean;
}
}
网友评论