java jdbc插入获取自增ID

用jdbc给数据库插入数据，主从表插入的过程中，需要先取出主表id。 

conn = DriverManager.getConnection(PL.DATABASE_URL ,PL.DATABASE_UID,PL.DATABASE_PWD );
                pstmt = conn.prepareStatement(PL.InsertPerson,Statement.RETURN_GENERATED_KEYS);
                pstmt.setString(1, this.person.getAddress());
                pstmt.executeUpdate();
                ResultSet rs=pstmt.getGeneratedKeys();
                long m=(long) 0;
                if(rs.next()){
                    /*mysql code*/    m=rs.getLong(1);    
                }
                pstmt.close();
                pstmt = null;

                return   m;

以上代码在mysql数据库环境下工作正常，转移到oracle环境出现以下异常：

void insertPersons(ServiceFormBean bean): SQLException 无效的列类型: getLong not implemented for class oracle.jdbc.driver.T4CRowidAccessor

后在网上找到以下解决方法，感谢网友智慧：

 1，用JDBC的getGeneratedKeys，返回的是Oracle 的rowid.第一次返回rowid, 第二次再通过rowid再查一次数据库。
String sql = "insert into xx_cust(cust_type,cust_name,login_name)"
+ " values('ipn','aaa','bb')";
Connection conn = DBConnectionManager.getConnection();
PreparedStatement sta = conn.prepareStatement(sql,
Statement.RETURN_GENERATED_KEYS);
sta.execute();
System.out.println(sta.getGeneratedKeys());
ResultSet rest = sta.getGeneratedKeys();
rest.next();
String rowid=rest.getString(1);
System.out.println("rowid="+rowid);
PreparedStatement stat=conn.prepareStatement("select cust_id from xx_cust where rowid=?");
stat.setString(1, rowid);
ResultSet rest2 = stat.executeQuery();
rest2.next();
String custId=rest2.getString(1);
System.out.println("custid="+custId);
2，通过用Oracle 的returning 语句
因为要用到oracle自己的API，所以如何用到像c3po等通用数据库连接池的话可以不能用。但是在数据库只连接一次。Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();? 
String url="jdbc:oracle:thin:@192.168.3.95:1521:tdm"; //orcl为数据库的SID? 
String user="pesup";? 
String password="pesup";? 
Connection conn= DriverManager.getConnection(url,user,password); 
String sql = "insert into xx_cust(cust_type,cust_name,login_name)"
+ " values('ipn','aaa','bb') returning cust_id into ?";
OraclePreparedStatement sta = (OraclePreparedStatement) conn
.prepareStatement(sql);
sta.registerReturnParameter(1, OracleTypes.INTEGER);
int count = sta.executeUpdate();
if (count > 0) {
ResultSet rset = sta.getReturnResultSet();
while (rset.next()) {
String name = rset.getString(1);
System.out.println("name=" + name);}