questiondaoimp.java

该在线考试关系统（B/S结构）主要采用JAVA语言开发涉及主要WEB技术有：Struts+Spring+Hibernate框架

package dao.hibernate;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.HibernateTemplate;

import po.Oexampaper;
import po.Oquestion;
import dao.IQuestionDao;

public class QuestionDaoImp implements IQuestionDao
{
	private SessionFactory sf;
	private HibernateTemplate template;
	
	public SessionFactory getSf()
	{
		return sf;
	}

	public void setSf(SessionFactory sf)
	{
		this.sf = sf;
		template = new HibernateTemplate(sf);
	}

	public void addQuestion(Oquestion que)
	{
		this.transerQuestion(que);
		template.save(que);
		sf.close();
	}

	public void delQuestion(String id)
	{
		template.delete(this.findByid(id));
		sf.close();
	}

	public List findAllQuestion()
	{
		List list = template.find("from Oquestion");
		sf.close();
		return list;
	}

	public Oquestion findByid(String id)
	{
		Oquestion que = (Oquestion)template.get(Oquestion.class, Long.parseLong(id));
		sf.close();
		return que;
	}

	public Collection findByQuestionkey(int currow, int pagesize,String text,String type,String style)
	{	
		Collection TestList = null;
		Query q = null;
		SessionFactory sf = template.getSessionFactory();
		Session s = sf.openSession();
		String hql = "";
		
		//没有条件
		if ((null == text && null == type && null == style)|| ("".equals(text) && "null".equals(type) && "null".equals(style))||
				("".equals(text) && "所有类型".equals(type) && "所有形式".equals(style)))
		{
			hql = "from Oquestion o order by o.id asc";
			q = s.createQuery(hql);
		}
		
		//1个条件
		else if(null!=text && "所有类型".equals(type) && "所有形式".equals(style))
		{
			hql = "from Oquestion o where o.name like :name";
			q = s.createQuery(hql);
			q.setString("name", "%" + text + "%");
		}
		
		else if("".equals(text) && ("所有类型".equals(type)==false) && "所有形式".equals(style))
		{
			hql = "from Oquestion o where o.type=?";
			
			q = s.createQuery(hql);
			q.setString(0,type);
		}
		
		else if("".equals(text) && "所有类型".equals(type) && ("所有形式".equals(style))==false)
		{
			hql = "from Oquestion o where o.style=?";
			q = s.createQuery(hql);
			q.setString(0,style);
		}
		
		//2个条件
		else if(null!=text && ("所有类型".equals(type)==false) && "所有形式".equals(style))
		{
			hql = "from Oquestion o where o.type=? and o.name like :name";
			q = s.createQuery(hql);
			q.setString(0,type);
			q.setString("name", "%" + text + "%");
		}
		else if(null!=text && "所有类型".equals(type) && ("所有形式".equals(style))==false)
		{
			hql = "from Oquestion o where o.style=? and o.name like :name";
			q = s.createQuery(hql);
			q.setString(0,style);
			q.setString("name", "%" + text + "%");
		}
		else if("".equals(text)&& ("所有类型".equals(type)==false) && ("所有形式".equals(style))==false)
		{
			hql = "from Oquestion o where o.style=? and o.type=?";
			q = s.createQuery(hql);
			q.setString(0,style);
			q.setString(1,type);
		}
		
		//3个条件
		else if(null!=text && ("所有类型".equals(type)==false) && ("所有形式".equals(style))==false)
		{
			hql = "from Oquestion o where o.style=? and o.type=? and o.name like :name";
			q = s.createQuery(hql);
			q.setString(0,style);
			q.setString(1,type);
			q.setString("name", "%" + text + "%");
		}
		else 
		{
			
		}
		
		q.setFirstResult(currow);
	    q.setMaxResults(pagesize);
	    TestList = q.list();
	    s.close();
	    return TestList;
	}
	
	public int findByQuestionkey(String text,String type,String style)
	{
		Query q = null;
		SessionFactory sf = template.getSessionFactory();
		Session s = sf.openSession();
		String hql = "";
		int count = 0;

		
		//没有条件
		if ((null == text && null == type && null == style)|| ("".equals(text) && "null".equals(type) && "null".equals(style))||
				("".equals(text) && "所有类型".equals(type) && "所有形式".equals(style)))
		{
			hql = "from Oquestion o order by o.id asc";
			q = s.createQuery(hql);
			System.out.println("111");
		}
		
		//1个条件
		else if(null!=text && "所有类型".equals(type) && "所有形式".equals(style))
		{
			hql = "from Oquestion o where o.name like :name";
			q = s.createQuery(hql);
			q.setString("name", "%" + text + "%");
			System.out.println("222");
		}
		
		else if("".equals(text) && ("所有类型".equals(type)==false) && "所有形式".equals(style))
		{
			hql = "from Oquestion o where o.type=?";
			q = s.createQuery(hql);
			q.setString(0,type);
			System.out.println("333");
		}
		
		else if("".equals(text) && "所有类型".equals(type) && ("所有形式".equals(style))==false)
		{
			hql = "from Oquestion o where o.style=?";
			q = s.createQuery(hql);
			q.setString(0,style);
			System.out.println("444");
		}
		
		//2个条件
		else if(null!=text && ("所有类型".equals(type)==false) && "所有形式".equals(style))
		{
			hql = "from Oquestion o where o.type=? and o.name like :name";
			q = s.createQuery(hql);
			q.setString(0,type);
			q.setString("name", "%" + text + "%");
			System.out.println("555");
		}
		else if(null!=text && "所有类型".equals(type) && ("所有形式".equals(style))==false)
		{
			hql = "from Oquestion o where o.style=? and o.name like :name";
			q = s.createQuery(hql);
			q.setString(0,style);
			q.setString("name", "%" + text + "%");
			System.out.println("666");
		}
		else if("".equals(text)&& ("所有类型".equals(type)==false) && ("所有形式".equals(style))==false)
		{
			hql = "from Oquestion o where o.style=? and o.type=?";
			q = s.createQuery(hql);
			q.setString(0,style);
			q.setString(1,type);
			System.out.println("777");
		}
		
		//3个条件
		else if(null!=text && ("所有类型".equals(type)==false) && ("所有形式".equals(style))==false)
		{
			hql = "from Oquestion o where o.style=? and o.type=? and o.name like :name";
			q = s.createQuery(hql);
			q.setString(0,style);
			q.setString(1,type);
			q.setString("name", "%" + text + "%");
		}
		else 
		{
			
		}
		count = q.list().size();
		s.close();
		return count;
	}
	public void updataQuestion(Oquestion que)
	{
		this.transerQuestion(que);
		template.saveOrUpdate(que);
		sf.close();
	}

	public void transerQuestion(Oquestion que)
	{
		String style = que.getStyle();
		if(style.equals("a"))
		{
			que.setStyle("判断");	
		}
		if(style.equals("b"))
		{	
			que.setStyle("单项选择");
		}
		if(style.equals("c"))
		{
			que.setStyle("多项选择");
		}
	}

	public List findQuestionbyTy(String type)
	{
		SessionFactory sf = template.getSessionFactory();
		Session s = sf.openSession();
		String hql = "select o from Oquestion o where o.style=? and o.type=?";
	    Query q = s.createQuery(hql);
	    q.setString(0,"判断");
	    q.setString(1,type);
	    List list  = q.list();
	    s.close();
		return list;
	}

	public List findQuestionbyTySt(String type,String style)
	{
		SessionFactory sf = template.getSessionFactory();
		Session s = sf.openSession();
		String hql = "select o from Oquestion o where o.style=? and o.type=?";
	    Query q = s.createQuery(hql);
	    q.setString(0,style);
	    q.setString(1,type);
	    List list  = q.list();
	    s.close();
		return list;
	}

	public List DoQuestionLevel(String level, List list,int num)
	{
		List list_ = new ArrayList();
		if("简单".equals(level))
		{	
			if(num>=10)
			{
				int num_ = num%5;
				num = num-num_;
				int num_e = (num*3)/5 + num_;
				int num_h = (num*1)/5;
				int num_s = (num*1)/5;
				Iterator iter = list.iterator();
				while(iter.hasNext())
				{
					Oquestion que = (Oquestion)iter.next();
					if(num_e>0&&que.getQlevel().equals("简单"))
					{
						list_.add(que);
						num_e--;
					}
					if(num_s>0&&que.getQlevel().equals("中等"))
					{
						list_.add(que);
						num_s--;
					}
					if(num_h>0&&que.getQlevel().equals("难"))
					{
						list_.add(que);
						num_h--;
					}
				}
				return list_;
			}
			else
			{
				return list;
			}
		}
		if("中等".equals(level))
		{
			if(num>=10)
			{
				int num_ = num%5;
				num = num-num_;
				int num_e = (num*1)/5;
				int num_h = (num*1)/5;
				int num_s = (num*3)/5 + num_;
				Iterator iter = list.iterator();
				while(iter.hasNext())
				{
					Oquestion que = (Oquestion)iter.next();
					if(num_e>0&&que.getQlevel().equals("简单"))
					{
						list_.add(que);
						num_e--;
					}
					if(num_s>0&&que.getQlevel().equals("中等"))
					{
						list_.add(que);
						num_s--;
					}
					if(num_h>0&&que.getQlevel().equals("难"))
					{
						list_.add(que);
						num_h--;
					}
				}
				return list_;
			}
			else
			{
				return list;
			}
		}
		if("难".equals(level))
		{
			if(num>=10)
			{
				int num_ = num%5;
				num = num-num_;
				int num_e = (num*1)/5;
				int num_h = (num*3)/5 + num_;
				int num_s = (num*1)/5;
				Iterator iter = list.iterator();
				while(iter.hasNext())
				{
					Oquestion que = (Oquestion)iter.next();
					if(num_e>0&&que.getQlevel().equals("简单"))
					{
						list_.add(que);
						num_e--;
					}
					if(num_s>0&&que.getQlevel().equals("中等"))
					{
						list_.add(que);
						num_s--;
					}
					if(num_h>0&&que.getQlevel().equals("难"))
					{
						list_.add(que);
						num_h--;
					}
				}
				return list_;
			}
			else
			{
				return list;
			}
		}
		return list_;
	}

	public List randomQuestion(List list)
	{
		List list_ = new ArrayList();
		int num = list.size();
		
		int index[] = this.random(num);
		
		for(int i=0;i <index.length; i++)
		{
			Oquestion que = (Oquestion)list.get(index[i]);
			list_.add(que);
		}
		
		return list_;
	}

	public int[] random(int num)
	{
		   int filled=0;                         //已填充数计数器
	       int card[]=new int[num];         //填充数组
	       int count;                          //存放随机数	
	       boolean flag=true;
	
	       while(true)
	       {
	            flag=true;
	            count=(int)(Math.random()*num);     //取得随机数
	
	            card[filled]=count;
	
	             for(int i=0;i<filled;i++)
	             {   //比较循环
	                if(card[i]==count)
	                {
	                        filled--;                   //随机数已存在
	                        flag=false; 
	                        break;
	                }
	            }
	                filled++;                   //计数器加1
	
	             if(filled==num)
	            break;
	       }
	       return card;
	}


}