java.sql.BatchUpdateException: ORA-01438: 值大于为此列指定的允许精度

当用hibernate框架向oracle插入数据时（用的是pl/sql工具）， 出现 java.sql.BatchUpdateException: ORA-01438: 值大于为此列指定的允许精度

代码：如下（一对多单向关联，Grade  对 Students ）

package entity;

import java.util.HashSet;
import java.util.Set;

/**
 * Grade entity. @author MyEclipse Persistence Tools
 */

public class Grade implements java.io.Serializable {

	// Fields

	private Integer gid;
	private String gname;
	private String gdesc;
	private Set studentses = new HashSet(0);

	// Constructors

	/** default constructor */
	public Grade() {
	}

	/** full constructor */
	public Grade(String gname, String gdesc, Set studentses) {
		this.gname = gname;
		this.gdesc = gdesc;
		this.studentses = studentses;
	}

	// Property accessors

	public Integer getGid() {
		return this.gid;
	}

	public void setGid(Integer gid) {
		this.gid = gid;
	}

	public String getGname() {
		return this.gname;
	}

	public void setGname(String gname) {
		this.gname = gname;
	}

	public String getGdesc() {
		return this.gdesc;
	}

	public void setGdesc(String gdesc) {
		this.gdesc = gdesc;
	}

	public Set getStudentses() {
		return this.studentses;
	}

	public void setStudentses(Set studentses) {
		this.studentses = studentses;
	}

}

package entity;

/**
 * Students entity. @author MyEclipse Persistence Tools
 */

public class Students implements java.io.Serializable {

	// Fields

	private Integer sid;
	//private Grade grade;
	private String sname;
	private String sex;

	// Constructors

	/** default constructor */
	public Students() {
	}

	/** minimal constructor */
	/*public Students(Grade grade, String sname) {
		this.grade = grade;
		this.sname = sname;
	}
*/
	/** full constructor */
//	public Students(Grade grade, String sname, String sex) {
//		this.grade = grade;
//		this.sname = sname;
//		this.sex = sex;
//	}

	// Property accessors

	public Integer getSid() {
		return this.sid;
	}

	public void setSid(Integer sid) {
		this.sid = sid;
	}

/*	public Grade getGrade() {
		return this.grade;
	}

	public void setGrade(Grade grade) {
		this.grade = grade;
	}*/

	public String getSname() {
		return this.sname;
	}

	public void setSname(String sname) {
		this.sname = sname;
	}

	public String getSex() {
		return this.sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

}

public class Test {
	Session session=null;
	Transaction tran=null;
	public static void main(String[] args) {
		new Test().save();
	}
	//添加
	public void save(){
		Grade g=new Grade();
		g.setGid(1112701);
		g.setGname("二班");
		g.setGdesc("一年级二班");
		
		Students stu=new Students();
		stu.setSid(9);
		stu.setSname("张华2");
		stu.setSex("女");
		
		Students stu1=new Students();
		stu1.setSid(10);
		stu1.setSname("刘平2");
		stu1.setSex("男");
		
		g.getStudentses().add(stu);
		g.getStudentses().add(stu1);
		
		//try {
			session=new Configuration().configure().buildSessionFactory().openSession();//得到会话对象
			tran=session.beginTransaction();//事务对象
			System.out.println(session==null);
			session.save(g);//添加
			session.save(stu);
			session.save(stu1);
		[color=red]	tran.commit();[/color] //这行报错
			System.out.println("添加成功！");
		//} catch (HibernateException e) {
			//System.out.println("添加失败");
		//}
	session.close();
	}

}

原因：pl/sql number(5),只能插入5位数字