兰州网站制作/seo指的是什么意思

1. Druid是什么？

Druid是Java语言中最好的数据库连接池。Druid能够提供强大的监控和扩展功能。

2. 在哪里下载druid

 正式版本下载：maven中央仓库: http://central.maven.org/maven2/com/alibaba/druid/

3. 怎么获取Druid的源码

Druid是一个开源项目，源码托管在github上，源代码仓库地址是 :
https://github.com/alibaba/druid
同时每次Druid发布正式版本和快照的时候，都会把源码打包，你可以从上面的下载地址中找到相关版本的源码
4. 怎么配置maven

Druid 0.1.18 之后版本都发布到maven中央仓库中，所以你只需要在项目的pom.xml中加上dependency就可以了。例如：

<dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>${druid-version}</version>
</dependency>

也可以选择 Maven仓库查找公共的仓库地址:
http://www.mvnrepository.com/artifact/com.alibaba/druid

5. 怎么打开Druid的监控统计功能

applicationContext.xml 数据源配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd"><description>Spring公共配置文件 </description><context:property-placeholder
        ignore-resource-not-found="true" location="classpath:spring/jdbc.properties" /><!-- 使用annotation 自动注册bean,并保证@Required,@Autowired的属性被注入 --><context:component-scan base-package="com"><context:exclude-filter type="annotation"expression="org.springframework.stereotype.Controller" /></context:component-scan><tx:annotation-driven /><!-- beecell_weixin_card 数据库配置连接开始 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource" /><property name="configLocation" value="classpath:/sqlmapper/sqlConfig.xml" /><property name="mapperLocations" value="classpath:/sqlmapper/**/*sqlmapper.xml" /></bean><bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"><constructor-arg index="0" ref="sqlSessionFactory" /><constructor-arg index="1" value="REUSE" /></bean><!-- 事务管理器配置, 使用jdbc事务 --><bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean><!-- spring declarative transaction management --><aop:config><aop:pointcut id="fooServiceMethods" expression="execution(* com.serviceImpl..*.*(..))" /><aop:advisor advice-ref="txAdvice" pointcut-ref="fooServiceMethods" /></aop:config><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="find*" read-only="true" propagation="REQUIRED"/><tx:method name="create*" rollback-for="Exception" propagation="REQUIRED" /><tx:method name="save*" rollback-for="Exception" propagation="REQUIRED" /><tx:method name="insert*" rollback-for="Exception" propagation="REQUIRED" /><tx:method name="update*" rollback-for="Exception" propagation="REQUIRED" /><tx:method name="delete*" rollback-for="Exception" propagation="REQUIRED" /></tx:attributes></tx:advice><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"destroy-method="close"><!-- Connection Info --><property name="driverClassName" value="${jdbc.driver}" /><property name="url" value="${jdbc.mysql.url}" /><property name="username" value="${jdbc.mysql.username}" /><property name="password" value="${jdbc.mysql.password}" /><!-- Connection Pooling Info --><property name="maxActive" value="${druid.maxActive}" /><property name="minIdle" value="1" /><property name="defaultAutoCommit" value="false" /><!-- 连接Idle一个小时后超时 --><property name="timeBetweenEvictionRunsMillis" value="3600000" /><property name="minEvictableIdleTimeMillis" value="3600000" /><!-- DataSource Druid配置 --><property name="validationQuery" value="SELECT SYSDATE() FROM DUAL" /><property name="testWhileIdle" value="true" /><property name="poolPreparedStatements" value="true" /><!-- 打开PSCache，并且指定每个连接上PSCache的大小 --><property name="maxPoolPreparedStatementPerConnectionSize"value="20" /><property name="filters" value="stat,config" /><!-- 开启druid监控支持(stat)，SQL防火墙(wall)以及SQL合并(mergeStat) --><property name="connectionProperties"value="druid.stat.slowSqlMillis=2000;config.decrypt=false" /><!-- 慢SQL标准 --><property name="removeAbandoned" value="true" /> <!-- 打开removeAbandoned功能 --><property name="removeAbandonedTimeout" value="1800" /> <!-- 1800秒，也就是30分钟 --><property name="logAbandoned" value="true" /> <!-- 关闭abanded连接时输出错误日志 --></bean><!-- beecell_weixin_card 数据库配置连接结束 --><!-- 使用annotation定义事务 --><tx:annotation-driven transaction-manager="transactionManager"proxy-target-class="true" /><!-- Druid AOP配置 --><bean id="druid-stat-interceptor"class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor"></bean><bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut"scope="prototype"><property name="patterns"><list><value>com.dao.base.*</value></list></property></bean><!-- 打开监控 --><aop:config><aop:advisor advice-ref="druid-stat-interceptor"pointcut-ref="druid-stat-pointcut" /></aop:config><!-- 打开面向切面工具 --><aop:aspectj-autoproxy /></beans>

web.xml 配置

<servlet><servlet-name>DruidStatView</servlet-name><servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class><init-param><!-- 用户名 --><param-name>loginUsername</param-name><param-value>druid</param-value></init-param><init-param><!-- 密码 --><param-name>loginPassword</param-name><param-value>druid</param-value></init-param></servlet><servlet-mapping><servlet-name>DruidStatView</servlet-name><url-pattern>/druid/*</url-pattern></servlet-mapping>

访问地址：
http://127.0.0.1:8080/项目/druid/index.html

参考文档：
配置_StatFilter： https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatFilter
常见问题： https://github.com/alibaba/druid/wiki/%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98