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.

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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 >

< bean id = "dataSource" class = "com.alibaba.druid.pool.DruidDataSource"destroy-method = "close" >

< 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}" />

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

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

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

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

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

< 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}" />

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

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

< 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

< 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 >

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

巴特西

Druid.jar包

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