阿里巴巴Druid连接池配置
Druid 是阿里巴巴的开源数据库连接池技术，相比dbcp、c3p0更优秀，具有密码加密、sql连接监控功能，无论在性能还是稳定性上表现都十分出色。
spring.xml
<context:property-placeholder location="classpath:jdbc.properties"/>
<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}" /> -->
<!-- 解密密码必须要配置的项 config, stat启用监控过滤器-->
<property name="filters" value="config,stat" />
<property name="connectionProperties" value="config.decrypt=true" />
</bean>
web.xml 中配置sql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>
jdbc.properties
oracle.driver = oracle.jdbc.driver.OracleDriver oracle.url = jdbc:oracle:thin:@127.0.0.1:1521:XE oracle.username = jelly oracle.password = SZRwkwTlSCh/pU3hXnVEIZ/RWXTltUAWWHZxUpOSI/peAToVyCViyxpz371Agv6yqz9YRpQIBZK5SwZNPKz++A== druid.initialSize = 3 druid.maxActive = 10 druid.maxIdle=5 druid.minIdle = 2 druid.maxWait = 60000 druid.removeAbandoned = true druid.removeAbandonedTimeout = 180 druid.timeBetweenEvictionRunsMillis = 60000 druid.minEvictableIdleTimeMillis = 300000 druid.validationQuery = SELECT 1 FROM DUAL druid.testWhileIdle = false druid.testOnBorrow = false druid.testOnReturn = false druid.poolPreparedStatements = true druid.maxPoolPreparedStatementPerConnectionSize = 20 filters =stat
cmd命令
java -cp druid-1.0.9.jar com.alibaba.druid.filter.config.ConfigTools you_password
浏览器访问Druid 监控页面:
http://localhost:8090/xedemo/druid/