我java.sql.Clob在Hibernate中有一个带有列的表

该hbm文件中：

<class name="com.model.ClobModel" table="table1">
   <id name="id" column="id">
      <generator class="assigned"></generator>
  </id> 
  <property name="clobData" type="clob">
      <column name="ClobData"></column>
  </property>

这是ClobModel：

private Integer id;
public Integer getId() {
    return id;
}

public void setId(Integer id) {
    this.id = id;
}

private Clob clobData;

public Clob getClobData() {
    return clobData;
}

public void setClobData(Clob clobData) {
    this.clobData = clobData;
}

当我在hibernate模式下尝试时：

SessionFactory sf = new Configuration().configure("clob.cfg.xml").buildSessionFactory();
    Session sess = sf.openSession();

    ClobModel cb = new  ClobModel();
    cb.setId(101);
    try {
                // getClobData() method returns String, trying to convert it into java.sql.Clob and then assign it to the model
                   cb.setClobData(new javax.sql.rowset.serial.SerialClob(new ClobInsert().getClobData().toCharArray()));
    } catch (SerialException e) {
        e.printStackTrace();
    } catch (SQLException e) {
        e.printStackTrace();
    }

    sess.save(cb);
    sess.flush();
    System.out.println("Exit!!!");

我有一个例外：

javax.sql.rowset.serial.SerialClob cannot be cast to oracle.sql.CLOB

Clob上面提到的所有类型java.sql.Clob。

不确定如何将转换String为java.sql.Clob？