c3p0 连接池配置

C3P0 可使用properties 配置文件方式，将c3p0.properties放在classpath目录下，如果为WEB应用，放在WEB-INF\classes下

c3p0.properties

#

# This file is detritus from various testing attempts

# the values below may change, and often do not represent

# reasonable values for the parameters.

#

c3p0.jdbcUrl=jdbc:oracle:thin:@127.0.0.1:1521:chenchi

c3p0.driverClass=oracle.jdbc.driver.OracleDriver

c3p0.user=hbota2

c3p0.password=ty1234

c3p0.minPoolSize=3

c3p0.maxPoolSize=20

#c3p0.testConnectionOnCheckout=true

#c3p0.testConnectionOnCheckin=true

#c3p0.checkoutTimeout=2000

#c3p0.idleConnectionTestPeriod=5

#c3p0.maxConnectionAge=10

#c3p0.maxIdleTime=2

#c3p0.maxIdleTimeExcessConnections=1

#c3p0.propertyCycle=1

#c3p0.numHelperThreads=10

#c3p0.unreturnedConnectionTimeout=15

#c3p0.debugUnreturnedConnectionStackTraces=true

#c3p0.maxStatements=30

#c3p0.maxStatementsPerConnection=5

#c3p0.maxAdministrativeTaskTime=3

#c3p0.preferredTestQuery=SELECT 1

#c3p0.preferredTestQuery=SELECT a FROM emptyyukyuk WHERE a = 5

#c3p0.preferredTestQuery=SELECT a FROM testpbds WHERE a = 5

#c3p0.usesTraditionalReflectiveProxies=true

#c3p0.automaticTestTable=PoopyTestTable

#c3p0.acquireIncrement=4

#c3p0.acquireRetryDelay=1000

#c3p0.acquireRetryAttempts=60

#c3p0.connectionTesterClassName=com.mchange.v2.c3p0.test.AlwaysFailConnectionTester

#c3p0.initialPoolSize=10

com.mchange.v2.log.MLog=com.mchange.v2.log.log4j.Log4jMLog

#com.mchange.v2.log.MLog=com.mchange.v2.log.jdk14logging.Jdk14MLog

#com.mchange.v2.log.MLog=com.mchange.v2.log.FallbackMLog

com.mchange.v2.log.NameTransformer=com.mchange.v2.log.PackageNames

com.mchange.v2.log.FallbackMLog.DEFAULT_CUTOFF_LEVEL=ALL

#com.mchange.v2.c3p0.VMID=poop

java

代码

ComboPooledDataSource cpds = new ComboPooledDataSource();

Connection conn = cpds.getConnection();

//

业务代码

conn.close();