SWT学生成绩管理系统

这个程序终于完完整整地做完了，虽然还不完善，但基本的功能实现了。这个程序零零散散花费了我近一个月的时间，在这一个月的时间里，通过别人的帮助和对程序的调试本人收获不小。希望通过这个博客和大家分享一下我在程序中犯的错误。

1.其实用SWT做东西，基本的组件什么的都挺容易，难的是两个或多个面板的调用（我想这就是面向对象思想吧）。当调用另一个Display时，一定要通过参数将主程序中的display传递到另一个程序中，然后在另一个程序用构造函数接受传递过来的display。

2.在用按钮调用另一个面板时，一定不要将面板设置为static类型的，否则第二次点击这个按钮时将会出错。

3.不管是主程序还是其它程序一定要有shell.open()，即将面板打开

4.在非主程序中还要有shell.close()即将面板关闭

下面看这个程序的要求：

要求：

1.实现增、删、改、查功能

2.使用SWT进行界面管理

下面大致的看一下这个程序的运行效果。

1、初次运行界面：

2、选择添加按钮：

输入信息，如果信息输入格式不正确：

输入正确的信息，就会添加到表格中。

3、选择删除按钮前，必须选中一条或多条信息，否则会出现：

选择将要删除的学生信息，点击删除按钮就会将改学生的信息在表格中删除。

4、选择修改按钮前，也必须选中一条信息，否则会出现：

选中信息后，点击修改按钮，就会出现修改学生信息窗口：

将信息修改后，点击确定按钮就会将原先的信息覆盖并显示在表格中

5、选择查询按钮，就会出现：

可以通过学号、姓名、成绩、班级或者他们中的任意一项或几项进行查询，如果一项都不写将出现：

如果没有您要查询的信息，将出现：

如果有您的信息，那么这个信息在表格中将以绿色显示：

这个程序还有许多要修改的地方。

//学生类
package com.dr.swt.XueChengXiTong;

public class Student {
  private int id;
  private String name;
  private float score;
  private String cls;
  public int getId() {
    return id;
  }
  public void setId(int id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public float getScore() {
    return score;
  }
  public void setScore(float score) {
    this.score = score;
  }
  public String getCls() {
    return cls;
  }
  public void setCls(String cls) {
    this.cls = cls;
  }

}


//主程序
package com.dr.swt.XueChengXiTong;

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Stack;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Layout;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;

public class MainUI
{
  static Table table=null;
  public static void main(String args[])
  {
    final Display display=new Display();
    final Shell shell=new Shell(display);
        //创建窗体
         shell.setLayout(new FillLayout());
         shell.setText("学生成绩管理系统");
    shell.setBounds(0,0,600,600);
    shell.setVisible(true);
    //创建表单
    table=new Table(shell,SWT.MULTI | SWT.FULL_SELECTION);
    table.setHeaderVisible(true);
    table.setLinesVisible(true);
    //创建列
    TableColumn column1=new TableColumn(table, SWT.NONE);
          column1.setText("学号");
          column1.setWidth(100);
          TableColumn column2=new TableColumn(table,SWT.NONE);
          column2.setText("姓名");
          column2.setWidth(100);
          TableColumn column3=new TableColumn(table,SWT.NONE);
          column3.setText("成绩");
          column3.setWidth(100);
          TableColumn column4=new TableColumn(table,SWT.NONE);
          column4.setText("班级");
          column4.setWidth(100);
          //创建按钮容器
          Composite post=new Composite(shell,SWT.NONE);
          Button button1=new Button(post,SWT.NONE);
          //创建按钮
          button1.setText("添加");
          button1.setBounds(30,30,100,50);
          Button button2=new Button(post,SWT.NONE);
          button1.setBackground(new Color(display, SWT.COLOR_DARK_RED, 200, 20));
          button2.setText("删除");
          button2.setBounds(200,30,100,50);
          button2.setFont(new Font(display,"宋体",20,SWT.NONE));
          Button button3=new Button(post,SWT.NONE);
          button3.setText("修改");
          button3.setBounds(30,150,100,50);
          Button button4=new Button(post,SWT.NONE);
          button3.setEnabled(true);
          button4.setText("查询");
          button4.setBounds(200,150,100,50);
          //table初始化
          new TableItem(table,SWT.LEFT).setText(new String[]{"10","张三","60","08楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"11","李四","90","09电本"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"12","王倩","70","08计本"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"13","李明","80","09楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"14","刘德华","50","08机电"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"15","范伟","40","09楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"16","朱元璋","70","08经贸"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"17","周星驰","65","09楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"18","李连杰","55","08楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"19","赵薇","78","09楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"20","林心如","70","08机械"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"21","周润发","88","09楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"22","成龙","73","08汉语言"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"23","赵本山","80","09楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"24","郭德纲","56","08小品"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"25","周迅","35","09楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"26","王络丹","49","08土木"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"27","刘亦菲","60","09楼宇"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"28","张静初","55","08建工"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"29","文章","78","09通信"});
          new TableItem(table,SWT.LEFT).setText(new String[]{"30","王力宏","80","09楼宇"});
          //为添加按钮添加事件处理
          button1.addSelectionListener(new SelectionAdapter(){
      public void widgetSelected(SelectionEvent e)
            {
        TableItem[] item=table.getItems();
        for(int i=0;i<item.length;i++)
        {
          item[i].setBackground(new Color(display,255, 255, 255));
        }
             System.out.println("test");
              AddStudentUI.addStuShow(display,table);
            }
          });
          //为删除按钮添加事件处理
          button2.addSelectionListener(new SelectionAdapter(){
      public void widgetSelected(SelectionEvent e)
            {
        TableItem[] item=table.getItems();
        for(int i=0;i<item.length;i++)
        {
          item[i].setBackground(new Color(display,255, 255, 255));
        }
        if(table.getSelectionIndex()==-1)
        {
          MessageBox box=new MessageBox(shell);
          box.setMessage("请选择要删除的内容");
          box.open();
        }
        else
        {
          int[] selInices = table.getSelectionIndices();//将选中的序号放在数组中
                table.remove(selInices);
        }
        
            }
          });
          //为修改按钮添加事件处理
          button3.addSelectionListener(new SelectionAdapter(){
      public void widgetSelected(SelectionEvent e)
            {
        TableItem[] item=table.getItems();
        for(int i=0;i<item.length;i++)
        {
          item[i].setBackground(new Color(display,255, 255, 255));
        }
        if(table.getSelectionIndex()==-1)
        {
          MessageBox box=new MessageBox(shell);
          box.setMessage("请选择要修改的内容");
          box.open();
        }
        else
        {
          ModifyStudentUI.modifyStuShow(display, table);
        }
            }
          });
          //为查找按钮添加事件处理
          button4.addSelectionListener(new SelectionAdapter(){
      public void widgetSelected(SelectionEvent e)
            {
        TableItem[] item=table.getItems();
        for(int i=0;i<item.length;i++)
        {
          item[i].setBackground(new Color(display,255, 255, 255));
        }
        FindStuUI.findStuShow(display,table);
            }
          });
            
    shell.pack();
    shell.open();
    while(!shell.isDisposed())
    {
      if(!display.readAndDispatch())
      {
        display.sleep();
      }
    }
        
    }

}

//添加学生程序
package com.dr.swt.XueChengXiTong;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;

class AddStudentUI
{
    Display display=null;
    Shell shell=new Shell(display);
    public AddStudentUI(Display dy) {
    display=dy;
  }
  public static    void addStuShow(Display dy,Table table)    
  {
    AddStudentUI ast=new AddStudentUI(dy);
    ast.run(table);
         }
  private void run(final Table table) {
    shell.setBounds(500,200,250,400);
    shell.setText("添加学生信息");
    //添加标签
    Label id=new Label(shell,SWT.NONE);
    id.setText("学号");
    id.setBounds(40,50,60,40);
    Label name=new Label(shell,SWT.NONE);
    name.setText("姓名");
    name.setBounds(40,100,60,40);
    Label score=new Label(shell,SWT.NONE);
    score.setText("成绩");
    score.setBounds(40,150,60,40);
    Label cls=new Label(shell,SWT.NONE);
    cls.setText("班级");
    cls.setBounds(40,200,60,40);
    //添加文本框
    final Text text1=new Text(shell,SWT.NONE);
    text1.setBounds(100,45,100,25);
    text1.setTextLimit(2);//学号必须是两位
    final Text text2=new Text(shell,SWT.NONE);
    text2.setBounds(100,95,100,25);
    text2.setTextLimit(6);//姓名最多为三位
    final Text text3=new Text(shell,SWT.NONE);
    text3.setBounds(100,145,100,25);
    final Text text4=new Text(shell,SWT.NONE);
    text4.setBounds(100,195,100,25);
    //添加按钮
    Button button1=new Button(shell,SWT.NONE);
    button1.setText("确定");
    button1.setBounds(55,250,60,40);
    Button button2=new Button(shell,SWT.NONE);
    button2.setText("取消");
    button2.setBounds(135,250,60,40);
    //为确定按钮添加事件处理，添加信息
                button1.addSelectionListener(new SelectionAdapter(){
      public void widgetSelected(SelectionEvent e)
            {
        try{
        Student stu=new Student();
                         stu.setId(Integer.parseInt(text1.getText()));
                         stu.setName(text2.getText());
                         stu.setScore(Float.valueOf(text3.getText()).floatValue());
                         stu.setCls(text4.getText());
                         new TableItem(table,0).setText(new String[] { Integer.toString(stu.getId()) ,stu.getName(),Float.toString(stu.getScore()),stu.getCls()});
                         shell.close();
        }catch(NumberFormatException e1)
        {
          MessageBox box=new MessageBox(shell,0);
          box.setMessage("输入信息无效");
          box.open();
        }
                
            }
          });
    //为取消按钮添加事件处理
                button2.addSelectionListener(new SelectionAdapter(){
      public void widgetSelected(SelectionEvent e)
            {
                         shell.close();
            }
          });
    shell.open();
  }
}

//修改学生程序

package com.dr.swt.XueChengXiTong;

import java.util.List;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;

public class ModifyStudentUI {
    Display display=null;
    Shell shell=new Shell(display);
    public ModifyStudentUI(Display dy) {
    display=dy;
  }public static    void modifyStuShow(Display dy,Table table)    
  {
    ModifyStudentUI mst=new ModifyStudentUI(dy);
    mst.run(table);
         }
    void run( final Table table) {
    shell.setBounds(500,200,250,400);
    shell.setText("修改学生信息");
    //添加标签
    Label id=new Label(shell,SWT.NONE);
    id.setText("学号");
    id.setBounds(40,50,60,40);
    Label name=new Label(shell,SWT.NONE);
    name.setText("姓名");
    name.setBounds(40,100,60,40);
    Label score=new Label(shell,SWT.NONE);
    score.setText("成绩");
    score.setBounds(40,150,60,40);
    Label cls=new Label(shell,SWT.NONE);
    cls.setText("班级");
    cls.setBounds(40,200,60,40);
    //添加文本框
    final Text text1=new Text(shell,SWT.NONE);
    text1.setBounds(100,45,100,25);
    text1.setText(table.getItem(table.getSelectionIndex()).getText(0));
    final Text text2=new Text(shell,SWT.NONE);
    text2.setBounds(100,95,100,25);
    text2.setText(table.getItem(table.getSelectionIndex()).getText(1));
    final Text text3=new Text(shell,SWT.NONE);
    text3.setBounds(100,145,100,25);
    text3.setText(table.getItem(table.getSelectionIndex()).getText(2));
    final Text text4=new Text(shell,SWT.NONE);
    text4.setBounds(100,195,100,25);
    text4.setText(table.getItem(table.getSelectionIndex()).getText(3));
    //添加按钮
    Button button1=new Button(shell,SWT.NONE);
    button1.setText("确定");
    button1.setBounds(55,250,60,40);
    Button button2=new Button(shell,SWT.NONE);
    button2.setText("取消");
    button2.setBounds(135,250,60,40);
    //为确定按钮添加事件处理，添加信息
                button1.addSelectionListener(new SelectionAdapter(){
      public void widgetSelected(SelectionEvent e)
            {
        try{
          Student stu=new Student();
                            stu.setId(Integer.parseInt(text1.getText()));
                            stu.setName(text2.getText());
                            stu.setScore(Float.valueOf(text3.getText()).floatValue());
                            stu.setCls(text4.getText());
                            TableItem tableitem=table.getItem(table.getSelectionIndex());
                            tableitem.setText(new String[] { Integer.toString(stu.getId()) ,stu.getName(),Float.toString(stu.getScore()),stu.getCls()});
                            shell.close();
          }catch(NumberFormatException e1)
          {
            MessageBox box=new MessageBox(shell,0);
            box.setMessage("输入信息无效");
            box.open();
          }
                
            }
          });
    //为取消按钮添加事件处理
                button2.addSelectionListener(new SelectionAdapter(){
      public void widgetSelected(SelectionEvent e)
            {
                         shell.close();
            }
          });
    shell.open();
  }
}


//查询学生程序

package com.dr.swt.XueChengXiTong;



import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;

public class FindStuUI {
  Display display=null;
  Shell shell=new Shell(display);
  public FindStuUI(Display dy)
  {
    this.display=dy;
  }
  static void findStuShow(Display dy,Table table)
  {
    FindStuUI fst=new FindStuUI(dy);
    fst.run(table);
  }
  public void run(final Table table)
  {
    shell.setBounds(500,200,280,400);
    shell.setText("查询学生信息");
    //添加标签
    Label shuoming=new Label(shell,SWT.NONE);
    shuoming.setText("请输入所要查询的信息，至少输入一项");
    shuoming.setFont(new Font(display,"宋体",10,SWT.BOLD));
    shuoming.setBounds(10,30,245,20);
    Label id=new Label(shell,SWT.NONE);
    id.setText("请输入要查询的学号");
    id.setBounds(20,70,120,40);
    Label name=new Label(shell,SWT.NONE);
    name.setText("请输入要查询的姓名");
    name.setBounds(20,120,120,40);
    Label score=new Label(shell,SWT.NONE);
    score.setText("请输入要查询的成绩");
    score.setBounds(20,170,120,40);
    Label cls=new Label(shell,SWT.NONE);
    cls.setText("请输入要查询的班级");
    cls.setBounds(20,220,120,40);
    //添加文本框
    final Text text1=new Text(shell,SWT.NONE);
    text1.setBounds(140,65,100,25);
    final Text text2=new Text(shell,SWT.NONE);
    text2.setBounds(140,115,100,25);
    final Text text3=new Text(shell,SWT.NONE);
    text3.setBounds(140,165,100,25);
    final Text text4=new Text(shell,SWT.NONE);
    text4.setBounds(140,215,100,25);
    //添加按钮
    Button button1=new Button(shell,SWT.NONE);
    button1.setText("确定");
    button1.setBounds(55,270,60,40);
    Button button2=new Button(shell,SWT.NONE);
    button2.setText("取消");
    button2.setBounds(135,270,60,40);
    //为确定按钮添加事件处理
    button1.addSelectionListener(new SelectionAdapter(){
        public void widgetSelected(SelectionEvent e)
              {
          boolean flag=false;
                if("".equals(text1.getText())&&"".equals(text2.getText())&&"".equals(text3.getText())&&"".equals(text4.getText()))
                {
                  MessageBox box = new MessageBox(shell);
            box.setMessage("请至少输入一项信息");
            box.open();
            
                }
                else
                {
                  int count=0;
                    
                  TableItem it[]=table.getItems();
                  for(int i=0;i<it.length;i++)
                  {
                    flag=true;
                    if(text1.getText().equals(it[i].getText(0)))
                    {
                      it[i].setBackground(new Color(display, SWT.COLOR_DARK_RED, 200, 20));flag=false;
                    }
                    else if(text2.getText().equals(it[i].getText(1)))
                    {
                      it[i].setBackground(new Color(display, SWT.COLOR_DARK_RED, 200, 20));flag=false;
                    }
                    else if(text3.getText().equals(it[i].getText(2)))
                    {
                      it[i].setBackground(new Color(display, SWT.COLOR_DARK_RED, 200, 20));flag=false;
                    }
                    else if(text4.getText().equals(it[i].getText(3)))
                    {
                      it[i].setBackground(new Color(display, SWT.COLOR_DARK_RED, 200, 20));flag=false;
                    }
                    if(flag==false)
                    {
                      count++;
                    }
                    
                        }
                  if(count==0)
                  {
                    MessageBox box=new MessageBox(shell);
                    box.setMessage("很抱歉，没有你所要查询的信息");
                    box.open();
                    
                  }
                
                }
                if(flag)
                {
                  shell.close();
                }
                            
              }
            });
      //为取消按钮添加事件处理
                 button2.addSelectionListener(new SelectionAdapter(){
        public void widgetSelected(SelectionEvent e)
              {
                            shell.close();
              }
            });
    shell.open();
  }
    

}