Really basic i tunes questions as I'm just learning how it all works

Question

Hi I'm hoping someone can help me as I'm upset that i've just lost alot of music on my i-pod when I was re charging it on my new laptop (as I have to hand in my old one every three years and silly me forgot to save a copy of my old music library as I just assumed it was safe on my ipod). Unfortunately I think i've lost it all as I also have my small shuffle connected to this new laptop (a friend set it all up for me and I guess I don't understand what happened. But now all the music from my shuffle is on my classic which is only 66 songs and different music and what was on my classic about 365 songs are gone many of which i manually uploaded from my old cd collections. I've got a good feeling it's gone but small optimistic part of me is hoping that someone might be able to help me reverse it un sync or at least help me set things up so that it doesn't happen again. thank you soooo much for taking the time to read this hopefully someone can help fingerscrossed.

Answer 1

The common consensus is that database/sql code does not belong in a JSP. JSTL provides that ability, but does put a caveat that it should only really be used for prototyping / small applications.
The more 'correct' way to do it, is to put the database code into java using JDBC. Write a data access method, and return the results in a list of beans.
So first you need a bean to represent a news article.
You might consider changing the date/time fields into a java.util.Date, but thats up to you.
public class NewsArticle{
private String pictureURL = null;
private String title = null;
private String news = null;
private String author = null;
private String email = null;
private Date date = null;
// plus appropriate getters/setters
Then you write a method that returns a list of these objects from the database:
public class NewsDataAccess{
public List getNewsResults(){
  Context initContext = new InitialContext();
  Context envContext  = (Context)initContext.lookup("java:/comp/env");
  DataSource ds = (DataSource)envContext.lookup("jdbc/mySite");
  Connection conn = null;
  Statement stmt = null;
  ResultSet rs = null;
  List result = new ArrayList();
  try{
    String sql = "SELECT * FROM news, users WHERE news.user = users.username";
    conn = ds.getConnection();
    stmt = conn.createStatement();
    rs = stmt.executeQuery(sql);
    while (rs.next()){
      Article article = new Article();
      article.title = rs.getString("title");
      article.author = rs.getString("author");
      result.add(article);
     return result;
  finally{
    try {if (rs != null) rs.close();} catch(Exception e){}
    try {if (stmt != null) stmt.close();} catch(Exception e){}
    try {if (con != null) con.close();} catch(Exception e){}
}I would then use JSTL to loop through the list, and pass an "Article" object to the custom tag.
Or just do it with JSTL instead of the custom tag.
Does that help?