详解springboot 使用c3p0数据库连接池的方法

<dependency>
  <groupId>c3p0</groupId>
  <artifactId>c3p0</artifactId>
  <version>0.9.1.2</version>
</dependency>

c3p0.jdbcUrl=jdbc:mysql://ip:port/dnname?useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly=false
c3p0.user=${username}
c3p0.password=${password}
c3p0.driverClass=com.mysql.jdbc.Driver
c3p0.minPoolSize=2
c3p0.maxPoolSize=10
c3p0.maxIdleTime=1800000
c3p0.acquireIncrement=3
c3p0.maxStatements=1000
c3p0.initialPoolSize=3
c3p0.idleConnectionTestPeriod=60
c3p0.acquireRetryAttempts=30
c3p0.acquireRetryDelay=1000
c3p0.breakAfterAcquireFailure=false
c3p0.testConnectionOnCheckout=false

@Configuration
public class DatasourceConfiguration {

 @Bean(name = "dataSource")
 @Qualifier(value = "dataSource")
 @Primary
 @ConfigurationProperties(prefix = "c3p0")
 public DataSource dataSource()
 {
  return DataSourceBuilder.create().type(com.mchange.v2.c3p0.ComboPooledDataSource.class).build();
 }
}