如何在springboot中应用C3P0数据源？

1、引入的maven依赖

<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.2</version>
</dependency>

2、springboot配置c3p0数据源datasource：

//    ==========  C3P0数据源配置类  ====================
    @Bean(name = "root")
    @Qualifier(value = "123456")
    @Primary
    @ConfigurationProperties(prefix = "c3p0")
    public ComboPooledDataSource dataSource()
    {
    
    
        return DataSourceBuilder.create().type(com.mchange.v2.c3p0.ComboPooledDataSource.class).build();
    }

3、application.properties中c3p0的配置信息

c3p0.jdbcUrl=jdbc:mysql:///mybatisplus?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