Java學習——鏈接數據庫

1.去官網下載對應版本的Ojdbc.jar（oracle）、sqljdbc.jar（sqlserver）。

2.放置到項目lib文件夾下

3.項目右鍵->Build Path->configure build path->libraries->add external jars。

4.鏈接方式：

Oracle數據庫：

    public static final String DBDRIVER = "oracle.jdbc.driver.OracleDriver";//SQL數據庫引擎
    public static final String connectDB = "jdbc:oracle:thin:@localhost:1521:DBName";//鏈接字符串 1521爲Oracle數據庫默認端口
    public static final String username = "sa";//用戶名
    public static final String password = "123456";//密碼

    public static void main(String[] args) throws IOException {
        Connection con = null;
        try {
            Class.forName(DBDRIVER);
            con = DriverManager.getConnection(connectDB, username, password);
            if (con != null) {
                System.out.println("鏈接成功!");
            }
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }

SQLSERVER數據庫：

public static final String DBDRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";//SQL數據庫引擎
    public static final String connectDB = "jdbc:sqlserver://localhost:1433;databaseName=DBName";//鏈接字符串 1433爲sqlserver默認端口，能夠不設置
    public static final String username = "sa";//用戶名
    public static final String password = "123456";//密碼

    public static void main(String[] args) throws IOException {
        Connection con = null;
        try {
            Class.forName(DBDRIVER);
            con = DriverManager.getConnection(connectDB, username, password);
            if (con != null) {
                System.out.println("鏈接成功!");
            }
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }