e240. committing and rolling back updates to a database.txt

这里面包含了一百多个JAVA源文件

By default, a connection commits all updates to the database immediately and automatically. For example, executing an UPDATE SQL query immediately commits the change. This example shows how to disable auto-commits and explicitly commit. 
    try {
        // Disable auto commit
        connection.setAutoCommit(false);
    
        // Do SQL updates...
    
        // Commit updates
        connection.commit();
    } catch (SQLException e) {
        // Rollback update
        connection.rollback();
    }