Druid
Druid is a project on open source platform Alibaba, the entire project by the database connection pool, plug-in framework and SQL parser components. The project is mainly to extend some restrictions JDBC, allowing programmers to achieve some special needs, such as a key service to request credentials, SQL statistical information, performance data collection, SQL, SQL injection checks, SQL translation, the programmer can customize to implement the functionality they need.
Maven jar package introduced
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.9</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.8</version>
</dependency>Configuring a database connection pool, add the following configuration file in ApplicationContext.xml
配置数据库
<!-- 声明属性文件 -->
<context:property-placeholder location="classpath:mysql.properties" />
<!-- 阿里 druid 数据库连接池 -->
<bean id = "dataSource" class = "com.alibaba.druid.pool.DruidDataSource" destroy-method = "close" >
<!-- 数据库基本信息配置 -->
<property name = "url" value = "jdbc:mysql://${mysql.host}:${mysql.port}/${mysql.dbname}?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull" />
<property name = "username" value = "${mysql.username}" />
<property name = "password" value = "${mysql.password}" />
<property name = "driverClassName" value = "${driverClassName}" />
<property name = "filters" value = "${filters}" />
<!-- 最大并发连接数 -->
<property name = "maxActive" value = "${maxActive}" />
<!-- 初始化连接数量 -->
<property name = "initialSize" value = "${initialSize}" />
<!-- 配置获取连接等待超时的时间 -->
<property name = "maxWait" value = "${maxWait}" />
<!-- 最小空闲连接数 -->
<property name = "minIdle" value = "${minIdle}" />
<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
<property name = "timeBetweenEvictionRunsMillis" value ="${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 ="${minEvictableIdleTimeMillis}" />
<!-- <property name = "validationQuery" value = "${validationQuery}" /> -->
<property name = "testWhileIdle" value = "${testWhileIdle}" />
<property name = "testOnBorrow" value = "${testOnBorrow}" />
<property name = "testOnReturn" value = "${testOnReturn}" />
<property name = "maxOpenPreparedStatements" value ="${maxOpenPreparedStatements}" />
<!-- 打开 removeAbandoned 功能 -->
<property name = "removeAbandoned" value = "${removeAbandoned}" />
<!-- 1800 秒，也就是 30 分钟 -->
<property name = "removeAbandonedTimeout" value ="${removeAbandonedTimeout}" />
<!-- 关闭 abanded 连接时输出错误日志 -->
<property name = "logAbandoned" value = "${logAbandoned}" />
<property name="proxyFilters">
<list>
<ref bean="wall-filter"/>
<ref bean="stat-filter"/>
<ref bean="log-filter"/>
</list>
</property>
</bean>
<!-- 慢SQL记录 -->
<bean id="stat-filter" class="com.alibaba.druid.filter.stat.StatFilter">
<!-- 慢sql时间设置,即执行时间大于200毫秒的都是慢sql -->
<property name="slowSqlMillis" value="2000"/>
<property name="logSlowSql" value="true"/>
</bean>
<bean id="log-filter" class="com.alibaba.druid.filter.logging.Log4jFilter">
<property name="dataSourceLogEnabled" value="true" />
<property name="statementExecutableSqlLogEnable" value="true" />
</bean>
<!-- 防御SQL攻击 -->
<bean id="wall-filter" class="com.alibaba.druid.wall.WallFilter">
<property name="config" ref="wall-config" />
<property name="logViolation" value="true" />
<!-- <property name="throwException" value="false" /> -->
</bean>
<bean id="wall-config" class="com.alibaba.druid.wall.WallConfig">
<property name="deleteAllow" value="false" />
<property name="truncateAllow" value="false" />
<property name="dropTableAllow" value="false" />
<property name="alterTableAllow" value="false" />
<property name="deleteWhereNoneCheck" value="false" />
<property name="updateWhereNoneCheck" value="false" />
</bean>
<!-- druid spring监控 start -->
<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.dekscom.db.dao.*</value>
</list>
</property>
</bean>
<!-- 创建基于类的代理 -->
<aop:config proxy-target-class="true">
<aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" />
</aop:config>
<!-- druid spring监控 end -->mysql.properties属性文件
mysql.host=localhost
mysql.port=3306
mysql.dbname=mysqldb
mysql.username=root
mysql.password=root
driverClassName: com.mysql.jdbc.Driver
filters: wall,stat
maxActive: 20
initialSize: 3
maxWait: 5000
minIdle: 3
maxIdle: 15
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 'x'
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
maxOpenPreparedStatements: 20
removeAbandoned: true
removeAbandonedTimeout: 1800
logAbandoned: true Add the following configuration in web.xml
<!-- 连接池 启用 Web 监控统计功能 start-->
<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>
<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>
<!-- 连接池 启用 Web 监控统计功能 end--> The results
http: // localhost: 80 / Project /druid/index.html
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