JDBC — для тех, кто хочет полный контроль. Пишете SQL сами и понимаете, что происходит в базе. Однако код будет повторяться, а отладка — настоящая головная боль. Как только проект растет, поддержка становится вызовом.
JPA — путь абстракции. Работаете с объектами, а не с SQL. Это удобство, но скрытая магия и потеря контроля могут создать проблемы с производительностью и отладкой в крупных проектах.
BY Библиотека джависта | Java, Spring, Maven, Hibernate
The S&P 500 slumped 1.8% on Monday and Tuesday, thanks to China Evergrande, the Chinese property company that looks like it is ready to default on its more-than $300 billion in debt. Cries of the next Lehman Brothers—or maybe the next Silverado?—echoed through the canyons of Wall Street as investors prepared for the worst.
A spike in interest rates since the start of the year has accelerated a rotation out of high-growth technology stocks and into value stocks poised to benefit from a reopening of the economy. The Nasdaq has fallen more than 10% over the past month as the Dow has soared to record highs, with a spike in the 10-year US Treasury yield acting as the main catalyst. It recently surged to a cycle high of more than 1.60% after starting the year below 1%. But according to Jim Paulsen, the Leuthold Group's chief investment strategist, rising interest rates do not represent a long-term threat to the stock market. Paulsen expects the 10-year yield to cross 2% by the end of the year. A spike in interest rates and its impact on the stock market depends on the economic backdrop, according to Paulsen. Rising interest rates amid a strengthening economy "may prove no challenge at all for stocks," Paulsen said.
Библиотека джависта | Java Spring Maven Hibernate from sa