lol

src/zutil/db/MySQLConnection.java

@@ -0,0 +1,76 @@
+package zutil.db;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+public class MySQLConnection {
+	Connection conn = null;
+	
+	/**
+	 * Connects to a MySQL server
+	 * @param url The URL of the MySQL server
+	 * @param db The database to connect to
+	 * @param user The user name
+	 * @param password The password
+	 * @throws SQLException 
+	 * @throws ClassNotFoundException 
+	 * @throws IllegalAccessException 
+	 * @throws InstantiationException 
+	 */
+    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
+     * NOTE: Don't forget to close the ResultSet and the Statement or it can lead to memory leak tex: rows.getStatement().close();
+     * @param sql The query to execute
+     * @return The data that the DB returned
+     * @throws SQLException
+     */
+    public synchronized ResultSet returnQuery(String sql) throws SQLException{
+    	Statement s = conn.createStatement ();
+    	s.executeQuery (sql);
+    	return s.getResultSet();    	
+    }
+    
+    /**
+     * Runs a query in the MySQL server and returns effected rows
+     * @param sql The query to execute
+     * @return Number of rows effected
+     * @throws SQLException
+     */
+    public synchronized int updateQuery(String sql) throws SQLException{
+    	Statement s = conn.createStatement ();
+    	int ret = s.executeUpdate(sql);
+    	s.close();
+    	return ret;
+    }
+    
+    /**
+     * Runs a Prepared Statement
+     * NOTE: Don't forget to close the PreparedStatement or it can lead to memory leak
+     * @param sql The SQL to run
+     * @return The PreparedStatement
+     * @throws SQLException
+     */
+    public synchronized PreparedStatement prepareStatement(String sql) throws SQLException{
+    	return conn.prepareStatement(sql);
+    }
+    
+    /**
+     * Disconnects from the database
+     * @throws SQLException 
+     *
+     */
+    public synchronized void close() throws SQLException{
+    	if (conn != null){
+            conn.close ();
+        }
+    }
+}