Mastering Spring 5.0

Reduction in plumbing code

Before Spring Framework, typical J2EE (or Java EE, as it is called now) applications contained a lot of plumbing code. For example: getting a database connection, exception handling code, transaction management code, logging code, and a lot more.

Let's take a look at a simple example of executing a query using prepared statement:

    PreparedStatement st = null;    try {          st = conn.prepareStatement(INSERT_TODO_QUERY);          st.setString(1, bean.getDescription());          st.setBoolean(2, bean.isDone());          st.execute();        }     catch (SQLException e) {          logger.error("Failed : " + INSERT_TODO_QUERY, e);     } finally {                if (st != null) {           try {           st.close();          } catch (SQLException e) {           // Ignore - nothing to do..          }       }     }

In the preceding example, there ...