import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;


/**
 * 连接数据包装类
 * 
 * @author yanxiaojia
 * @qq 1576735050
 * 
 */
public class BaseDao {

	public static final String DRIVER = "oracle.jdbc.driver.OracleDriver";
	public static final String URL = "jdbc:oracle:thin:@localhost:1521:orcl";
	public static final String USERNAME = "scott";
	public static final String PASSWORD = "tiger";

	/**
	 * 连接数据
	 * 
	 * @return conn
	 */
	public Connection getConnection() {
		Connection conn = null;
		try {
			Class.forName(DRIVER);
			conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return conn;
	}

	/**
	 * 关闭连接对象
	 * 
	 * @param conn
	 *            连接对象
	 * @param pstmt
	 *            预编译对象
	 * @param rs
	 *            结果集
	 */
	public void closeAll(Connection conn, PreparedStatement pstmt, ResultSet rs) {
		try {
			if (rs != null) {
				rs.close();
			}
			if (pstmt != null) {
				pstmt.close();
			}
			if (conn != null) {
				pstmt.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 增删改操作
	 * 
	 * @param sql
	 *            SQL命令
	 * @param param
	 *            参数
	 * @return
	 */
	public int executsQuery(String sql, String[] param) {
		int result = 0;
		Connection conn = null;
		PreparedStatement pstmt = null;
		try {
			conn = this.getConnection();
			pstmt = conn.prepareStatement(sql);
			if (param != null) {
				for (int i = 0; i < param.length; i++) {
					pstmt.setString(i + 1, param[i]);
				}
			}
			result = pstmt.executeUpdate();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			this.closeAll(conn, pstmt, null);
		}
		return result;
	}
}