Trail: JDBC Database Access
Lesson: JDBC Introduction
JDBC manage three programming activities:
- Connect to a data source, like a database.
- Send queries and update statements to the database.
- Retrieve and process the results received from the database in answer to your query.
JDBC Product Components
JDBC includes four components:
- The JDBC API is divided into two packages: java.sql and javax.sql.
- JDBC Driver Manager
- JDBC Test Suite
- JDBC-ODBC Bridge
主要使用前两个， 测试后面学习 junit5 的时候留意一下
JDBC Architecture
Two-tier and Three-tier Processing Models
In the two-tier model, a java application talks directly to the data source.
In the three-tier model, commands are sent to a “middle tier” of services.
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