String sourceURL = "jdbc:opengauss://127.0.0.1:8080/test?user=myuser&password=myPassWord";
System.out.println("Current date and time: " + localDateTime);
├──6.用30个类手写SpringV2.0版本之三级缓存与循环依赖
public static void main(String[] args) {
boolean shouldCarryUmbrella = isRainy && isUmbrellaAvailable; // 逻辑与