druid连接池配置

Posted 2020-07-17 dar521lin

package demo.test;

import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import javax.sql.DataSource;

import com.alibaba.druid.pool.DruidDataSourceFactory;


public class DBUtil {

    private static DataSource ds = null;	
    
    static {
        try{
            InputStream in = DBUtil.class.getClassLoader()
                                   .getResourceAsStream("ds.properties");
            Properties props = new Properties();
            props.load(in);
            ds = DruidDataSourceFactory.createDataSource(props);
        }catch(Exception ex){
            ex.printStackTrace();
        }
    }
    
    public static Connection openConnection() throws SQLException{
        return ds.getConnection();
    }	
    
}

 ds.properties内容：　

driverClassName = oracle.jdbc.driver.OracleDriver
url = jdbc:oracle:thin:@127.0.0.1:1521:ORCL
username = ******
password = ******

initialSize = 5
maxActive = 10
minIdle = 3
maxWait = 60000
removeAbandoned = true
removeAbandonedTimeout = 180
timeBetweenEvictionRunsMillis = 60000
minEvictableIdleTimeMillis = 300000
validationQuery = SELECT 1 FROM DUAL
testWhileIdle = true 
testOnBorrow = false
testOnReturn = false
poolPreparedStatements = true
maxPoolPreparedStatementPerConnectionSize = 50
filters = stat

　基于Spring的配置：　

<bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource"
        init-method="init" destroy-method="close">
        <!-- 数据库基本信息配置 -->
        <property name="driverClassName" value="${oracle.driver}" />
        <property name="url" value="${oracle.url}" />
        <property name="username" value="${oracle.username}" />
        <property name="password" value="${oracle.password}" />		
        <!-- 初始化连接数量 -->
        <property name="initialSize" value="${druid.initialSize}" />
        <!-- 最大并发连接数 -->
        <property name="maxActive" value="${druid.maxActive}" />
        <!-- 最大空闲连接数 -->
        <property name="maxIdle" value="${druid.maxIdle}" />
        <!-- 最小空闲连接数 -->
        <property name="minIdle" value="${druid.minIdle}" />
        <!-- 配置获取连接等待超时的时间 -->		
        <property name="maxWait" value="${druid.maxWait}" />
        <!-- 超过时间限制是否回收 -->
        <property name="removeAbandoned" value="${druid.removeAbandoned}" />
        <!-- 超过时间限制多长； -->
        <property name="removeAbandonedTimeout" value="${druid.removeAbandonedTimeout}" />
        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="${druid.timeBetweenEvictionRunsMillis}" />
        <!-- 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="${druid.minEvictableIdleTimeMillis}" />
        <!-- 用来检测连接是否有效的sql，要求是一个查询语句-->	
        <property name="validationQuery" value="${druid.validationQuery}" />
        <!-- 申请连接的时候检测 -->
        <property name="testWhileIdle" value="${druid.testWhileIdle}" />
        <!-- 申请连接时执行validationQuery检测连接是否有效，配置为true会降低性能 -->
        <property name="testOnBorrow" value="${druid.testOnBorrow}" />
        <!-- 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="${druid.testOnReturn}" />
        <!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
        <property name="poolPreparedStatements" value="${druid.poolPreparedStatements}" />		
        <property name="maxPoolPreparedStatementPerConnectionSize" value="${druid.maxPoolPreparedStatementPerConnectionSize}" />
        <!--属性类型是字符串，通过别名的方式配置扩展插件，常用的插件有：  				
                监控统计用的filter:stat
                日志用的filter:log4j
 				防御SQL注入的filter:wall -->
        <property name="filters" value="${druid.filters}" />		
    </bean>

　启用Web监控统计功能需要在Web应用的web.xml中加入以下内容：　

<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>
</filter>
<filter-mapping>
     <filter-name>DruidWebStatFilter</filter-name>
     <url-pattern>/*</url-pattern>
</filter-mapping>	
<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>

 访问监控页面：http://ip：port/projectName/druid/index.html