[Lv2] A Complete Guide to JPA for Professional Developers — From the Persistence Context to Practical Patterns

You’ve written SQL with JdbcTemplate before, right? I’m sure everyone has experienced the frustration of having to modify both the SQL and the RowMapper every time a single column changes. This course begins with that pain. A single SELECT using plain JDBC takes 35 lines. You open a Connection, create a PreparedStatement, iterate through the ResultSet, and if you forget even one close(), the server goes down. After typing through this hell yourself, encountering JPA’s one-line save() makes you feel, not just understand, “This is why people use JPA.”