dbutil.java

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package com.witbridge.netstore.util;

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 DBUtil {
	private static Connection conn;
	public DBUtil(){
		
	}
	public static DBUtil getIstance(){
		return new DBUtil();
	}
	 public Connection getConn() throws SQLException{
		try {
			Class.forName("com.mysql.jdbc.Driver");
			conn=DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/netstore","root","root");
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return conn;
	}
	 
	 public Connection getConn(boolean actocommit) throws SQLException{
			try {
				Class.forName("com.mysql.jdbc.Driver");
				conn=DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/netstore","root","root");
				conn.setAutoCommit(actocommit);
			} catch (ClassNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			return conn;
		}
	
	public static void commit(Connection conn) throws SQLException{
		if(conn!=null&&!conn.isClosed()){
				conn.commit();
		}
	}

	public static void rollback(Connection conn) throws SQLException{
		if(conn!=null&&!conn.isClosed()){
				conn.rollback();
		}
	}
	
	public static void release() throws SQLException{
		if(conn!=null&&!conn.isClosed()){
			conn.close();
	}
	}
	public static void release(Statement st) throws SQLException{
		st.close();
		conn.close();
	}
	
	public static void release(PreparedStatement pt) throws SQLException{
		pt.close();
		conn.close();
	}
	
	public static void release(Statement st,ResultSet rs) throws SQLException{
		rs.close();
		st.close();
		conn.close();
		}
	
	public static void release(PreparedStatement pt,ResultSet rs) throws SQLException{
		
		rs.close();
		pt.close();
		conn.close();
		
	}
}