用什么控件？增加、删除、修改操作，sql语句会写，但是不知怎么调用，最好有例子

Class.forName("oracle.jdbc.driver.OracleDriver").newInstance(); 
String url="jdbc:oracle:thin:@localhost:1521:orcl"; 
//orcl为你的数据库的SID 
String user="scott"; 
String password="tiger"; 
Connection conn= DriverManager.getConnection(url,user,password); 
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); 
String sql="select * from test"; 
ResultSet rs=stmt.executeQuery(sql); 
while(rs.next()) {
out.println(rs.getString(1));   
out.println(rs.getString(2));  
}
out.print("数据库操作成功，恭喜你");    
rs.close(); 
stmt.close(); 
conn.close(); 

public String getSeqPlanId(){
    Connection conn = null;
    PreparedStatement pstmt = null;
    try {
      conn = dataSource.getConnection();
      String sql = "select SEQ_PROJECT_PLAN.nextval  from dual";
      pstmt = conn.prepareStatement(sql);
      ResultSet rs = pstmt.executeQuery();
      rs.next();
      String seq = rs.getString(1);
      return seq;
    } catch(SQLException e){
         log("getSeqPlanId",e.toString());
         throw new EJBException(e);
      }finally{
          if(pstmt != null){
            try{
              pstmt.close();
            }catch(Exception ex){
            }
          }
          if(conn != null){
            try{
              conn.close();
            }catch(Exception ex){
            }
         }
      } // end of finally
  };