class.java

基于java的jsp开发的在线考试系统 基于java的jsp开发的在线考试系统

package javaBeanClass.Class;
import javaBeanClass.DatabaseConn;
import javaBeanClass.Class.ClassData;
import java.util.*;
import java.sql.*;
public class Class
{
	private DatabaseConn db;
	
	private int pageNumber=1;//要显示的页码数，默认为1
	private int totalPage;//总页数
	
	private int ID;
	private String ClassNumber;
	
	private String sql;
	
	public void setPageNumber(int pageNumber){this.pageNumber=pageNumber;}
	public int getPageNumber(){return this.pageNumber;}
	public void setTotalPage(int totalPage){this.totalPage=totalPage;}
	public int getTotalPage(){return this.totalPage;}
	
	public void setID(int ID){this.ID=ID;}
	public int getID(){return this.ID;}
	public void setClassNumber(String ClassNumber){this.ClassNumber=ClassNumber;}
	public String getClassNumber(){return this.ClassNumber;}
	
	public Class(){db=new DatabaseConn();}
	
	public ClassData findByPrimaryKey()throws SQLException
	{
		sql="select * from Class where ID=?";
		Connection con;
		PreparedStatement ps=null;
		ResultSet rs=null;
		try{con=db.connectToDB();}
		catch(Exception ex){throw new SQLException("Connect database failed!");}
		try
		{
			ps=con.prepareStatement(sql);
			ps.setInt(1,ID);
			rs=ps.executeQuery();
			if(rs.next())
			{return new ClassData(rs.getInt(1),rs.getString(2));}
		}
		catch(Exception ex)
		{
			System.out.println("FindByPrimaryKey Class failed:"+ex.getMessage());
			throw new SQLException("FindByPrimaryKey Class failed!");
		}
		finally
		{
			try{con.close();ps.close();}
			catch(SQLException sqlex){System.out.println("FindByPrimaryKey Close Class Error:"+sqlex.getMessage());}
		}
		return null;
	}
	
	public Vector findAll(int pageSizes)throws SQLException
	{
		String tableName="Class";
		String whereStr="where Del='0'"+(ClassNumber==null?"":" And ClassNumber like '%"+ClassNumber+"%'");
		String orderByStr="order by ClassNumber";
		
		Vector vResults=new Vector(1,1);
		boolean bResult=false;
		//sql="select * from Class where Del='0'";
		Connection con;
		CallableStatement ps=null;
		ResultSet rs=null;
		try{con=db.connectToDB();}
		catch(Exception ex){throw new SQLException("Connect database failed!");}
		try
		{
			ps=con.prepareCall("{call pr_splitPage(?,?,?,?,?)}");
			ps.registerOutParameter(1,java.sql.Types.INTEGER);
			ps.setString(2,tableName);
			ps.setInt(3,88888888);//用于返回总页数
			ps.setInt(4,pageSizes);
			ps.setString(5,whereStr);
			ps.executeUpdate();//首先返回总页数,存储过程不能即返回总页数又返回记录集，具体用法还要再研究
			this.totalPage=ps.getInt(1);
						
			ps=con.prepareCall("{call pr_splitPage(?,?,?,?,?,?)}");
			ps.registerOutParameter(1,java.sql.Types.INTEGER);//用于返回记录集，此参数可不带
			ps.setString(2,tableName);
			ps.setInt(3,pageNumber);
			ps.setInt(4,pageSizes);
			ps.setString(5,whereStr);
			ps.setString(6,orderByStr);
			
			rs=ps.executeQuery();
			bResult=rs.next();
			if(bResult)
			{
				do
				{
					vResults.add(new ClassData(rs.getInt(1),rs.getString(2)));
				}while(rs.next());
			}
		}
		catch(Exception ex)
		{
			System.out.println("FindAll Class failed:"+ex.getMessage());
			throw new SQLException("FindAll Class failed!");
		}
		finally
		{
			try{con.close();ps.close();}
			catch(SQLException sqlex){System.out.println("FindAll Close Class Error:"+sqlex.getMessage());}
		}
		if(bResult)
		{return vResults;}
		else
		{return null;}
	}
	
	public Vector findAllDeleted(int pageSizes)throws SQLException
	{
		String tableName="Class";
		String whereStr="where Del='1'"+(ClassNumber==null?"":" And ClassNumber like '%"+ClassNumber+"%'");
		String orderByStr="order by ClassNumber";
		
		Vector vResults=new Vector(1,1);
		boolean bResult=false;
		//sql="select * from Class where Del='1'";
		Connection con;
		CallableStatement ps=null;
		ResultSet rs=null;
		try{con=db.connectToDB();}
		catch(Exception ex){throw new SQLException("Connect database failed!");}
		try
		{
			ps=con.prepareCall("{call pr_splitPage(?,?,?,?,?)}");
			ps.registerOutParameter(1,java.sql.Types.INTEGER);
			ps.setString(2,tableName);
			ps.setInt(3,88888888);//用于返回总页数
			ps.setInt(4,pageSizes);
			ps.setString(5,whereStr);
			ps.executeUpdate();//首先返回总页数,存储过程不能即返回总页数又返回记录集，具体用法还要再研究
			this.totalPage=ps.getInt(1);
						
			ps=con.prepareCall("{call pr_splitPage(?,?,?,?,?,?)}");
			ps.registerOutParameter(1,java.sql.Types.INTEGER);//用于返回记录集，此参数可不带
			ps.setString(2,tableName);
			ps.setInt(3,pageNumber);
			ps.setInt(4,pageSizes);
			ps.setString(5,whereStr);
			ps.setString(6,orderByStr);
			
			rs=ps.executeQuery();
			bResult=rs.next();
			if(bResult)
			{
				do
				{
					vResults.add(new ClassData(rs.getInt(1),rs.getString(2)));
				}while(rs.next());
			}
		}
		catch(Exception ex)
		{
			System.out.println("FindAllDeleted Class failed:"+ex.getMessage());
			throw new SQLException("FindAllDeleted Class failed!");
		}
		finally
		{
			try{con.close();ps.close();}
			catch(SQLException sqlex){System.out.println("FindAllDeleted Close Class Error:"+sqlex.getMessage());}
		}
		if(bResult)
		{return vResults;}
		else
		{return null;}
	}
	
	public void insert()throws SQLException
	{
		sql="insert into Class (ClassNumber) values(?)";
		Connection con;
		PreparedStatement ps=null;
		
		try{con=db.connectToDB();}
		catch(Exception ex){throw new SQLException("Connect database failed!");}
		boolean bTemp;
		try
		{

			ps=con.prepareStatement(sql);
			ps.setString(1,ClassNumber);
			int rowCount=ps.executeUpdate();
			if(rowCount==0)
			{
				throw new SQLException("Insert Class failed!");
			}
		}
		catch(SQLException sqlex)
		{
			System.out.println("Insert Class Error:"+sqlex.getMessage());
			throw new SQLException("Insert Class Error!");
		}
		finally
		{
			try{con.close();ps.close();}
			catch(SQLException sqlex){System.out.println("Insert Close Class Error:"+sqlex.getMessage());}
		}
	}
	private void check() throws RuntimeException
	{
		sql="select count(*) from UserInfo where ClassId=?";
		Connection con;
		PreparedStatement ps=null;
		try{con=db.connectToDB();}
		catch(Exception ex){throw new RuntimeException("Connect database failed!");}
		try
		{
			ps=con.prepareStatement(sql);
			ps.setInt(1,ID);
			ResultSet rs=ps.executeQuery();
			if(rs.next())
			{
				throw new RuntimeException("Failed!");
			}
		}
		catch(Exception e)
		{
			System.out.println("Other Of Update Class Error:"+e.getMessage());
			throw new RuntimeException("该班级还未清空请清空后再删除该班");
		}
		finally
		{
			try{con.close();ps.close();}
			catch(SQLException sqlex){System.out.println("Update Close Class Error:"+sqlex.getMessage());}
		}	
	}
	public void update()throws SQLException,Exception
	{
		sql="update Class set ClassNumber=? where ID=?";
		Connection con;
		PreparedStatement ps=null;
		try{con=db.connectToDB();}
		catch(Exception ex){throw new SQLException("Connect database failed!");}
		try
		{
			ps=con.prepareStatement(sql);
			ps.setString(1,ClassNumber);
			ps.setInt(2,ID);
			int rowCount=ps.executeUpdate();
			if(rowCount==0)
			{
				throw new SQLException("Update Class failed!");
			}
		}
		catch(SQLException sqlex)
		{
			System.err.println("Update Class Error:"+sqlex.getMessage());
			throw new SQLException("Update Class Error");
		}
		catch(Exception e)
		{
			System.out.println("Other Of Update Class Error:"+e.getMessage());
			throw new Exception("Other Of Update Class Error");
		}
		finally
		{
			try{con.close();ps.close();}
			catch(SQLException sqlex){System.out.println("Update Close Class Error:"+sqlex.getMessage());}
		}
	}
	
	public void delete()throws SQLException
	{
		this.check();
		sql="update Class set Del='1' where ID=?";
		Connection con;
		PreparedStatement ps=null;
		try{con=db.connectToDB();}
		catch(Exception ex){throw new SQLException("Connect database failed!");}
		try
		{
			ps=con.prepareStatement(sql);
			ps.setInt(1,ID);
			int rowCount=ps.executeUpdate();
			if(rowCount==0)
			{
				throw new SQLException("Delete Class failed!");
			}
		}
		catch(SQLException sqlex)
		{
			System.out.println("Delete Class Error:"+sqlex.getMessage());
			throw new SQLException("Delete Class Error");
		}
		finally
		{
			try{con.close();ps.close();}
			catch(SQLException sqlex){System.out.println("Delete Close Class Error:"+sqlex.getMessage());}
		}
	}
	
	public void realDelete()throws SQLException
	{
		this.check();
		sql="delete Class where ID=?";
		Connection con;
		PreparedStatement ps=null;
		try{con=db.connectToDB();}
		catch(Exception ex){throw new SQLException("Connect database failed!");}
		try
		{
			ps=con.prepareStatement(sql);
			ps.setInt(1,ID);
			int rowCount=ps.executeUpdate();
			if(rowCount==0)
			{
				throw new SQLException("realDelete Class failed!");
			}
		}
		catch(SQLException sqlex)
		{
			System.out.println("realDelete Class Error:"+sqlex.getMessage());
			throw new SQLException("realDelete Class Error");
		}
		finally
		{
			try{con.close();ps.close();}
			catch(SQLException sqlex){System.out.println("realDelete Close Class Error:"+sqlex.getMessage());}
		}
	}
	
	public void restor()throws SQLException
	{
		sql="update Class set Del='0' where ID=?";
		Connection con;
		PreparedStatement ps=null;
		try{con=db.connectToDB();}
		catch(Exception ex){throw new SQLException("Connect database failed!");}
		try
		{
			ps=con.prepareStatement(sql);
			ps.setInt(1,ID);
			int rowCount=ps.executeUpdate();
			if(rowCount==0)
			{
				throw new SQLException("Restor Class failed!");
			}
		}
		catch(SQLException sqlex)
		{
			System.out.println("Restor Class Error:"+sqlex.getMessage());
			throw new SQLException("Restor Class Error");
		}
		finally
		{
			try{con.close();ps.close();}
			catch(SQLException sqlex){System.out.println("Restor Close Class Error:"+sqlex.getMessage());}
		}
	}
}