java 数据库连接的几个步骤

Class.forName("oracle.jdbc.driver.OracleDriver");
String url = "jdbc:oracle:thin:@你的主机ip :1521:orcl";// 设置连接字符串
String username = "你的用户名";
String password = "你的密码";
Connection con=java.sql.DriverManager.getConnection(url,user,password);
Statement stmt = con.createStatement();

StringBuffer sql = new StringBuffer("insert into user values （" + list.get(1).getId()+", "+list.get(1).getUserName()+", "+list.get(1).getPassword()+")");
for(int i = 2; i < list.size(); i++){
    sql.append(", ("+ list.get(i).getId()+", "+list.get(i).getUserName()+", "+list.get(i).getPassword()+")");//
}
sql.append(";");

  ResultSet rs = stmt.executeQuery(sql);

rs.close();
 stmt.close();
  con.close();