searclassinfobyclassidhandler.java

在本系统中

package jin.handler;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import java.util.*;

import jin.dao.*;
import jin.bean.*;
import jin.view.*;
import jin.internalFrame.*;

//可以按照班级编号、班级名称、专业名称、院系名称分别查询班级信息，也可以查询所有的班级信息。
//显示的班级信息包括：班级编号、班级名称、专业名称、院系名称四个数据项。


//按班级编号查询班级信息

public class SearClassInfoByClassIDHandler extends JInternalFrame
{
	private JTable table;

	private SearClassInfoByClassID searClassInfoByClassID;
	private JTextField field;
	
	public SearClassInfoByClassIDHandler(SearClassInfoByClassID searClassInfByClassID)  //,String Id
	{
		this.searClassInfoByClassID=searClassInfByClassID;
		field=searClassInfoByClassID.getField();
	
		searClassInfoByClassID.getButtonsPanel().getButton(0).addActionListener
		(
			new ActionListener()
			{
				public void actionPerformed(ActionEvent e)
				{
					String[] ccolumnNames={"班级编号","班级名称","专业名称","院系名称"
					};
		
					DefaultTableModel tableModel=new DefaultTableModel(ccolumnNames,0);		
					
					String sql1="select * from classInfo";
					ClassInfoDAO classInfoDAO=new ClassInfoDAO();
					ArrayList classlist=classInfoDAO.excuteQuery(sql1);
					ClassInfoBean classInfoBean=null;
					int flag=0;
					for(int i=0;i<classlist.size();i++)
					{
						classInfoBean=(ClassInfoBean)classlist.get(i);
						if(classInfoBean.getClassID().trim().equals(field.getText().trim()))
						{
							String sql2="select * from majorInfo";
		
							MajorInfoDAO majorInfoDAO=new MajorInfoDAO();
							ArrayList majorlist=majorInfoDAO.excuteQuery(sql2);
							MajorInfoBean majorInfoBean=null;
							
							for(int j=0;j<majorlist.size();j++)
							{
								majorInfoBean=(MajorInfoBean)majorlist.get(j);
								{
									if(majorInfoBean.getMajorID().trim().equals(classInfoBean.getMajorID().trim()))
									{
										String[] object={classInfoBean.getClassID(),classInfoBean.getClassName(),majorInfoBean.getMajorName(),majorInfoBean.getBelongTo()
										};
										tableModel.addRow(object);
										break;
									}
								}
							}
							flag=1;
							break;
						}
					}
					
					if(flag==0)
					{
						JOptionPane.showMessageDialog(null,"没有该班级!");
					}
					
					if(flag==1)
					{
						table=new JTable(tableModel);
					
						JScrollPane scrollPanel=new JScrollPane(table,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
						searClassInfoByClassID.add(scrollPanel,BorderLayout.CENTER);
						searClassInfoByClassID.setSize(450,451);	
					}	
								
				}
			}
		);	
		
		searClassInfoByClassID.getButtonsPanel().getButton(1).addActionListener
		(
			new ActionListener()
			{
				public void actionPerformed(ActionEvent e)
				{
					searClassInfoByClassID.setVisible(false);
				}
			}
		);

	}

}