public class JDBCDemo {
?? ?public static void main(String[] args) {
?? ??? ?String url = "jdbc:oracle:thin:@localhost:1521:orcl";? //連接ORL目標地址
?? ??? ?String driver = "oracle.jdbc.driver.OracleDriver";? //驅動類名
?? ??? ?String userName = "scott";? //用戶名
?? ??? ?String pwd = "tiger";? //密碼
?? ??? ?
?? ??? ?try {
?? ??? ??? ?Class.forName(driver);? //加載數據庫驅動
?? ??? ??? ?Connection con = DriverManager.getConnection(url,userName,pwd);? //創建數據庫連接
?? ??? ??? ?String set = "select * from myemp";? //查詢表
?? ??? ??? ?
//?? ??? ??? ?String del = "delete from myemp where empno = ?";
//?? ??? ??? ?PreparedStatement pre = con.prepareStatement(del);
//?? ??? ??? ?int empno = 7876;
//?? ??? ??? ?pre.setInt(1, empno);
//?? ??? ??? ?pre.executeUpdate();? //更新數據庫內容
?? ??? ??? ?
//?? ??? ??? ?String upd = "update myemp set sal = 5000 where empno = ?";
//?? ??? ??? ?PreparedStatement pre = con.prepareStatement(upd);
//?? ??? ??? ?int empno = 7788;
//?? ??? ??? ?pre.setInt(1, empno);
//?? ??? ??? ?pre.executeUpdate();
?? ??? ??? ?
?? ??? ??? ?String ins = "insert into myemp (empno,ename,job,sal)values(?,?,?,?)";
?? ??? ??? ?PreparedStatement pre = con.prepareStatement(ins);
?? ??? ??? ?int empno = 7878;
?? ??? ??? ?String ename = "張三";
?? ??? ??? ?String job = "清潔工";
?? ??? ??? ?int sal = 5000;
?? ??? ??? ?pre.setInt(1,empno);
?? ??? ??? ?pre.setString(2,ename);
?? ??? ??? ?pre.setString(3,job);
?? ??? ??? ?pre.setInt(4,sal);
?? ??? ??? ?pre.executeUpdate();

?? ??? ??? ?Statement stm = con.createStatement(); ?
?? ??? ??? ?//通過Conection對象中的crateStatement創建一個Statement對象，通過新建的對象來執行SQL語句
?? ??? ??? ?ResultSet res = stm.executeQuery(set);? //用ResultSet接受查詢結果?? ??? ?
?? ??? ??? ?while(res.next()){
?? ??? ??? ??? ?System.out.print(res.getInt("empno")+"\t");
?? ??? ??? ??? ?System.out.print(res.getString("ename")+"\t");
?? ??? ??? ??? ?System.out.print(res.getString("job")+"\t");
?? ??? ??? ??? ?System.out.println(res.getString("sal"));
?? ??? ??? ?}
?? ??? ??? ?con.close();
?? ??? ??? ?stm.close();
?? ??? ??? ?res.close();
?? ??? ?} catch (ClassNotFoundException e) {
?? ??? ??? ?e.printStackTrace();
?? ??? ?} catch (SQLException e) {
?? ??? ??? ?e.printStackTrace();
?? ??? ?}
?? ?}
}

轉載于:https://blog.51cto.com/9882931/1614960

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