Druid.jar包

首先了解一下,什么是Druid.

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

  Druid是一个JDBC组件,它包括三部分: 

 1)DruidDriver 代理Driver,能够提供基于Filter-Chain模式的插件体系。 

 2)DruidDataSource 高效可管理的数据库连接池。 

 3)SQLParser

  Druid可以做什么呢,官网做了一下解释:

1) 可以监控数据库访问性能,Druid内置提供了一个功能强大的StatFilter插件,能够详细统计SQL的执行性能,这对于线上分析数据库访问性能有帮助。 

2) 替换DBCP和C3P0。Druid提供了一个高效、功能强大、可扩展性好的数据库连接池。 

3) 数据库密码加密。直接把数据库密码写在配置文件中,这是不好的行为,容易导致安全问题。DruidDruiver和DruidDataSource都支持PasswordCallback。 

4) SQL执行日志,Druid提供了不同的LogFilter,能够支持Common-Logging、Log4j和JdkLog,你可以按需要选择相应的LogFilter,监控你应用的数据库访问情况。 

  接下来就开始我们的正题,Druid在SpringMVC中的配置与使用.

============================分割线================================

  1. 首先从 http://repo1.maven.org/maven2/com/alibaba/druid/ 下载最新的jar包,然后导到项目之中.

  2.配置ApplicationContext.xml

< bean name = "transactionManager" class ="org.springframework.jdbc.datasource.DataSourceTransactionManager" >   

    < property name = "dataSource" ref = "dataSource" ></ property >

     </ bean >

    < bean id = "propertyConfigurer" class ="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >  

       < property name = "locations" >  

           < list >  

                 < value > /WEB-INF/classes/dbconfig.properties </ value >  

            </ list >  

        </ property >  

    </ bean >

    <!-- 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 = "${url}" />  

         < property name = "username" value = "${username}" />  

         < property name = "password" value = "${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}" />

    </ bean >

3.添加dbconfig.properties

url:jdbc:mysql://60.205.106.190:3306/oasis_mom(你的项目的地址)

driverClassName: com.MySQL.jdbc.Driver

username: root(项目数据库名称)

password: root(项目数据库密码)

filters: stat

maxActive: 20

initialSize: 1

maxWait: 60000

minIdle: 10

maxIdle: 15

timeBetweenEvictionRunsMillis: 60000

minEvictableIdleTimeMillis: 300000

validationQuery: SELECT 'x'

testWhileIdle: true

testOnBorrow: false

testOnReturn: false

maxOpenPreparedStatements: 20

removeAbandoned: true

removeAbandonedTimeout: 1800

logAbandoned: true

4.配置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 >

    </ 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-->

5.配置完毕,访问监控页面: http://ip:port/projectName/druid/index.html(http://test.cn/honghclient/druid/weburi.html)进行访问

 

原文章:https://www.cnblogs.com/mengmengi/p/10777619.html

posted @ 2019-06-22 18:56  殇之弑梦  阅读(1170)  评论(0编辑  收藏  举报