druid 源码阅读 2——minEvictableIdleTimeMillis 参数的实现逻辑

public void test_druid() throws Exception {    DruidDataSource dataSource = new DruidDataSource();
    dataSource.setInitialSize(initialSize);    dataSource.setMaxActive(maxActive);    dataSource.setMinIdle(minIdle);    dataSource.setMaxIdle(maxIdle);    dataSource.setPoolPreparedStatements(true);    dataSource.setDriverClassName(driverClass);    dataSource.setUrl(jdbcUrl);    dataSource.setPoolPreparedStatements(true);    dataSource.setUsername(user);    dataSource.setPassword(password);    dataSource.setValidationQuery(validationQuery);    dataSource.setTestOnBorrow(testOnBorrow);    dataSource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
    for (int i = 0; i < LOOP_COUNT; ++i) {        p0(dataSource, "druid");    }    System.out.println();}