connectdb.java

网上投票——提供发起投票和投票功能 在最后在统计票数。

package wstp;

import java.sql.*;

public class connectDB
{
	String DBDriver =  "oracle.jdbc.driver.OracleDriver";
	String DBUrl = "jdbc:oracle:thin:@localhost:1521:ORACLE";
	String DBUser = "jerry";
	String DBPsw = "123456";
	Connection conn = null;
	PreparedStatement stmt = null;
	public connectDB()
	{
		try
		{
			Class.forName(DBDriver);
			conn = DriverManager.getConnection(DBUrl,DBUser,DBPsw);
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
	}
	public ResultSet executeQuery(String sql) throws Exception
	{
		try
		{
			this.stmt = null;
			this.stmt = conn.prepareStatement(sql);
			return this.stmt.executeQuery();
		}
		catch (Exception e)
		{
			e.printStackTrace();
			return null;
		}
	}
	public int executeUpdate(String sql) throws Exception
	{
		try
		{
			this.stmt = null;
			this.stmt = conn.prepareStatement(sql);
			return this.stmt.executeUpdate();
		}
		catch (Exception e)
		{
			e.printStackTrace();
			return 0;
		}
		
	}
	public void closeDB()
	{
		try
		{
			conn.close();
			stmt.close();
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
	}
}