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Fixed some bugs

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This commit is contained in:
Ziver Koc 2009-09-16 21:29:22 +00:00
parent 73be002969
commit 19a0e92d88
4 changed files with 126 additions and 62 deletions
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26
src/zutil/db/MySQLConnection.java
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@ -18,24 +18,41 @@ public class MySQLConnection {
* @param user is the user name
* @param password is the password
*/
public MySQLConnection(String url,String db,String user, String password) throws SQLException, InstantiationException, IllegalAccessException, ClassNotFoundException{
public MySQLConnection(String url, String db, String user, String password)
throws SQLException, InstantiationException, IllegalAccessException, ClassNotFoundException{
Class.forName ("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection ("jdbc:mysql://"+url+"/"+db, user, password);
}
/**
* Runs a query and returns the result.<br>
* <b>NOTE:</b> Don't forget to close the ResultSet and the Statement or it can lead to memory leak tex: rows.getStatement().close();
* <b>NOTE:</b> Don't forget to close the ResultSet and the Statement or it
* can lead to memory leak: rows.getStatement().close();
*
* @param sql is the query to execute
* @return the data that the DB returned
*/
public synchronized ResultSet returnQuery(String sql) throws SQLException{
public synchronized ResultSet query(String sql) throws SQLException{
Statement s = conn.createStatement ();
s.executeQuery (sql);
s.executeQuery(sql);
return s.getResultSet();
}
/**
* Returns the first cell of the first row of the query
*
* @param sql is the SQL query to run, preferably with the LIMIT 1 at the end
* @return A SQL row if it exists or else null
*/
public synchronized String simpleQuery(String sql) throws SQLException{
Statement s = conn.createStatement ();
s.executeQuery(sql);
ResultSet result = s.getResultSet();
if(result.next())
return result.getString(0);
return null;
}
/**
* Runs a query in the MySQL server and returns effected rows
*
@ -52,6 +69,7 @@ public class MySQLConnection {
/**
* Runs a Prepared Statement.<br>
* <b>NOTE:</b> Don't forget to close the PreparedStatement or it can lead to memory leak
*
* @param sql is the SQL query to run
* @return The PreparedStatement
*/