SWT学生成绩管理系统（转）

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：
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2、选择添加按钮：
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输入信息，如果信息输入格式不正确：
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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：
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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：
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选中信息后，点击修改按钮，就会出现修改学生信息窗口：
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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：
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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：
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如果没有您要查询的信息，将出现：
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如果有您的信息，那么这个信息在表格中将以绿色显示：
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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(); 
  } 
    

} 
 
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原文地址：https://www.cnblogs.com/xhqgogogo/p/3372293.html