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[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[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[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[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                  {
                    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();
  }
    

}

转载于:https://blog.51cto.com/tscfengkui/414050