jdbc 序列生成pk

package Jdbcday02;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class TestPk {
	public static void main(String[] args) {
		insert();
	}
	public static void insert() {
		String sql="insert into sun_student(id,name,age,sex)" +
				"values(myseq.nextval,?,?,?)";
		Connection conn=null;
		PreparedStatement psmt=null;
		try {
		 conn = ConnectionUtils.openConnection();
			psmt=conn.prepareStatement(sql);
			psmt.setString(1, "gaoxuan");
			psmt.setInt(2, 23);
			psmt.setString(3, "F");
			System.out.println(psmt.execute());//false时候返回的不是结果集合
		} catch (SQLException e) {
			e.printStackTrace();
		}finally{
			ConnectionUtils.closeStatement(psmt);
			ConnectionUtils.closeConnection(conn);
		}
	}
}