jdbcutils.java

来自「青年论坛设计想关代码」· Java 代码 · 共 70 行

package com.ql.bbs.util;

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

public class JdbcUtils {
	private static JdbcUtils jdbc;
	private static String name = "root";
	private static String password = "root";
	private static String driver = "com.mysql.jdbc.Driver";
	private static String url = "jdbc:mysql:///bbs";

	private JdbcUtils() {

	}

	static {
		try {
			Class.forName(driver);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public static JdbcUtils getInstance() {
		if (jdbc == null) {
			synchronized (JdbcUtils.class) {
				if (jdbc == null) {
					jdbc = new JdbcUtils();
				}
			}
		}
		return jdbc;
	}

	public Connection getConnection() throws SQLException {
		return DriverManager.getConnection(url, name, password);
	}

	public void close(Connection con, PreparedStatement pstmt, ResultSet rs) {
		try {
			if (rs != null) {
				rs.close();
			}
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			try {
				if (pstmt != null) {
					pstmt.close();
				}
			} catch (SQLException e) {
				e.printStackTrace();
			} finally {
				try {
					if (con != null) {
						con.close();
					}
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
		}
	}
}