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彻底理解 JDBC | nonlinearthink's blog #3

Closed nonlinearthink closed 3 years ago

nonlinearthink commented 4 years ago

https://nonlinearthink.github.io/2020/06/27/jdbc-summary/

JDBC (Java Database Connectivity) ，属于 Java 应用编程中比较基础的一块，我们会从最基本的开始，由浅入深地解释 JDBC 中的各种问题。连接数据库驱动初始化基于 Class.forName 的初始化想要开始 JDBC 编程，第一步是需要把数据库驱动程序的代码加载进来。可以利用 Class.forName 函数，它原本的功能是返回一个类或者

wangtianyu0222 commented 4 years ago

test

dlnb! dlnb!


# Where to save the figures
PROJECT_ROOT_DIR = "."
CHAPTER_ID = "fundamentals"
IMAGES_PATH = os.path.join(PROJECT_ROOT_DIR, "images", CHAPTER_ID)
os.makedirs(IMAGES_PATH, exist_ok=True)

def save_fig(fig_id, tight_layout=True, fig_extension="png", resolution=300): path = os.path.join(IMAGES_PATH, fig_id + "." + fig_extension) print("Saving figure", fig_id) if tight_layout: plt.tight_layout() plt.savefig(path, format=fig_extension, dpi=resolution)