MySql,SqlServer,Oracle鏈接數據庫工具類

1.MySQL:

package com.text.tools;

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

/***
 * 連接MySql數據庫
 *@author <a href="mailto:[email protected]">chenqihao</a>
 *@version 2013-3-9
 */
public class JDBCConn {
	public Connection getConnection() {
		String driver = "com.mysql.jdbc.Driver";
		String url = "jdbc:mysql://127.0.0.1:3306/books";
		String user = "root";
		String password = "123";
		Connection conn = null;

		try {
			Class.forName(driver);
		}
		catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		try {
			conn = DriverManager.getConnection(url, user, password);
			if (!conn.isClosed())
				System.out.println("Succeeded connecting to the Database!");
		}
		catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return conn;
	}

	public static void main(String[] args) {
		JDBCConn jdbc = new JDBCConn();
		System.out.println(jdbc.getConnection());
	}
}

2.SQLServer:

package com.text.tools;

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

/**
 * 鏈接SQLServer數據庫內
 * @author <a href="mailto:[email protected]">chenqihao</a>
 *@version 2013-9-13
 */
public class JDBCConnSqlServer {
	public Connection getConnectionSql() {

		String driverName = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
		String dbURL = "jdbc:microsoft:sqlserver://localhost:1433;databasename=li"; // 1433是數據庫的端口，"li"是你的數據庫名稱
		String userName = "sa"; // sa是數據庫的超級用戶，最好不要換別的名字，權限問題
		String password = "123456"; // sa的密碼

		Connection dbConn = null;
		try {
			Class.forName(driverName).newInstance();
			dbConn = DriverManager.getConnection(dbURL, userName, password);
			System.out.println("連接成功!");
		}
		catch (Exception e) {
			e.printStackTrace();
		}
		finally {
			try {
				if (dbConn != null)
					dbConn.close();
			}
			catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return null;
	}

	public static void main(String[] args) {
		JDBCConnSqlServer jdbc = new JDBCConnSqlServer();
		System.out.println(jdbc.getConnectionSql());
	}
}

3.Oracle:

package com.text.tools;

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

/**
 * Oracle鏈接數據庫類
 * @author <a href="mailto:[email protected]">chenqihao</a>
 *@version 2013-9-13
 */
public class JDBCConnOracle {
	public static Connection getConnection() {
		// 定義一個連接對象
		Connection conn = null;
		// 定義連接數據庫的URL資源
		String url = "jdbc:oracle:thin:@localhost:1521:orcl";
		// 定義連接數據庫的用戶名稱與密碼
		String username = "scott";
		String password = "tiger";
		// 加載數據庫連接驅動
		String className = "oracle.jdbc.driver.OracleDriver";
		try {
			Class.forName(className);
		}
		catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		// 獲取數據庫的連接對象
		try {
			conn = DriverManager.getConnection(url, username, password);
			System.out.println("數據庫連接建立成功...");
		}
		catch (SQLException e) {
			e.printStackTrace();
		}
		// 返回連接對象
		return conn;
	}

	public static void main(String[] args) {
		JDBCConnOracle jdbc = new JDBCConnOracle();
		System.out.println(jdbc.getConnection());
	}
}