1. Rules and Tips for Good Web Programming (and Programming in General)
Chengyu Sun
California State University, Los Angeles

2. Follow naming conventions Use descriptive names
Start with Data
Java model classes and table schemas
Use package
Follow naming conventions
Use descriptive names
The different between primitive types vs class types

3. One servlet (i.e. controller) per operation
Identify operations
Display
Add
Rename
Delete
One servlet (i.e. controller) per operation
One view per operation except for form processing operations, in which case we need two: one form view, one result view

4. JDBC driver only needs to loaded once per project; it has to be loaded before other servlets (use loadOnStartup)
Use Id, do not use Name
Use PreparedStatement  it's safe, and more readable than string concatenation

5. Reuse code by refactoring them into their own classes/methods
Pass data to JSP using Request Scope
Do NOT use Application scope (i.e. getServletContext())
Avoid using Session scope for anything other than login/logout

6. Use SQL whenever possible Form processing operation
Form view
Result View
After add a new folder
Display the added folder
Or Display the parent folder
Redirect is a special view

7. Forward: pass data from controller to view
Redirect: send the user to a different operation (controller)
Use View Source
Use the Debug feature in Eclipse