searstuinfobymajornamehandler.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.*;


//可以按照学生学号、学生姓名、班级名称、专业名称和院系名称分别查询满足条件的学生信息，
//也可以查询所有学生信息。显示的学生信息包括：学生学号、学生姓名、班级名称、专业名称、院系名称五个数据项

//按照专业名称查询

public class SearStuInfoByMajorNameHandler extends JInternalFrame
{
	private JTable table;
	
	
	private SearStuInfoByMajorName searStuInfoByMajorName;
	private JTextField field;	
	
	public SearStuInfoByMajorNameHandler(SearStuInfoByMajorName searStuInfoByMajorNa)  //,String Id
	{
		this.searStuInfoByMajorName=searStuInfoByMajorNa;
		field=searStuInfoByMajorName.getField();
	
		searStuInfoByMajorName.getButtonsPanel().getButton(0).addActionListener
		(
			new ActionListener()
			{
				public void actionPerformed(ActionEvent e)
				{
					String[] ccolumnNames={"学生学号","学生姓名","班级名称","专业名称","院系名称"
					};
		
					DefaultTableModel tableModel=new DefaultTableModel(ccolumnNames,0);		
					
					String sql1="select * from majorInfo";
					
					MajorInfoDAO majorInfoDAO=new MajorInfoDAO();
					ArrayList majorlist=majorInfoDAO.excuteQuery(sql1);
					MajorInfoBean majorInfoBean=null;
					int flag=0;
					for(int i=0;i<majorlist.size();i++)
					{
						majorInfoBean=(MajorInfoBean)majorlist.get(i);
						if(majorInfoBean.getMajorName().trim().equals(field.getText().trim()))
						{
							System.out.println("专业");
							String sql2="select * from classInfo";
							ClassInfoDAO classInfoDAO=new ClassInfoDAO();
							ArrayList classList=classInfoDAO.excuteQuery(sql2);
							ClassInfoBean classInfoBean=null;
					
							for(int j=0;j<classList.size();j++)
							{
								classInfoBean=(ClassInfoBean)classList.get(j);
								if(classInfoBean.getMajorID().trim().equals(majorInfoBean.getMajorID().trim()))
								{
									System.out.println("班级");
									String sql3="select * from stuInfo";
				
									StuInfoDAO stuInfoDAO=new StuInfoDAO();
									ArrayList stulist=stuInfoDAO.excuteQuery(sql3);
									StuInfoBean stuInfoBean=null;
							
									for(int k=0;k<stulist.size();k++)
									{
										stuInfoBean=(StuInfoBean)stulist.get(k);
										if(classInfoBean.getClassID().trim().equals(stuInfoBean.getClassID().trim()))
										{
											System.out.println("学生");
											String[] object={stuInfoBean.getStuID(),stuInfoBean.getStuName(),classInfoBean.getClassName(),majorInfoBean.getMajorName(),majorInfoBean.getBelongTo()
											};									
											tableModel.addRow(object);
										}
									}									
								}
							}
							
							flag=1;
						}
					}					
					
					if(flag==0)
					{
						JOptionPane.showMessageDialog(null,"没有该专业!");
						searStuInfoByMajorName.setVisible(false);
					}	
					
					if(flag==1)	
					{
						table=new JTable(tableModel);
					
						JScrollPane scrollPanel=new JScrollPane(table,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
						searStuInfoByMajorName.add(scrollPanel,BorderLayout.CENTER);
						searStuInfoByMajorName.setSize(450,451);		
					}	
								
				}
			}
		);	
		
		searStuInfoByMajorName.getButtonsPanel().getButton(1).addActionListener
		(
			new ActionListener()
			{
				public void actionPerformed(ActionEvent e)
				{
					searStuInfoByMajorName.setVisible(false);
				}
			}
		);

	}

}