這個程序終于完完整整地做完了，雖然還不完善，但基本的功能實現了。這個程序零零散散花費了我近一個月的時間，在這一個月的時間里，通過別人的幫助和對程序的調試本人收獲不小。希望通過這個博客和大家分享一下我在程序中犯的錯誤。
1.其實用SWT做東西，基本的組件什么的都挺容易，難的是兩個或多個面板的調用（我想這就是面向對象思想吧）。當調用另一個Display時，一定要通過參數將主程序中的display傳遞到另一個程序中，然后在另一個程序用構造函數接受傳遞過來的display。
2.在用按鈕調用另一個面板時，一定不要將面板設置為static類型的，否則第二次點擊這個按鈕時將會出錯。
3.不管是主程序還是其它程序一定要有shell.open()，即將面板打開
4.在非主程序中還要有shell.close()即將面板關閉
下面看這個程序的要求：
要求：
1.實現增、刪、改、查功能
2.使用SWT進行界面管理
下面大致的看一下這個程序的運行效果。
1、初次運行界面：
2、選擇添加按鈕：
輸入信息，如果信息輸入格式不正確：
輸入正確的信息，就會添加到表格中。
3、選擇刪除按鈕前，必須選中一條或多條信息，否則會出現：
選擇將要刪除的學生信息，點擊刪除按鈕就會將改學生的信息在表格中刪除。
4、選擇修改按鈕前，也必須選中一條信息，否則會出現：
選中信息后，點擊修改按鈕，就會出現修改學生信息窗口：
將信息修改后，點擊確定按鈕就會將原先的信息覆蓋并顯示在表格中
5、選擇查詢按鈕，就會出現：
可以通過學號、姓名、成績、班級或者他們中的任意一項或幾項進行查詢，如果一項都不寫將出現：
如果沒有您要查詢的信息，將出現：
如果有您的信息，那么這個信息在表格中將以綠色顯示：
這個程序還有許多要修改的地方。
//學生類
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;
}
}
//主窗體
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);
//創建窗體
shell.setLayout(new FillLayout());
shell.setText("學生成績管理系統");
shell.setBounds(0,0,600,600);
shell.setVisible(true);
//創建表單
table=new Table(shell,SWT.MULTI | SWT.FULL_SELECTION);
table.setHeaderVisible(true);
table.setLinesVisible(true);
//創建列
TableColumn column1=new TableColumn(table, SWT.NONE);
column1.setText("學號");
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("成績");
column3.setWidth(100);
TableColumn column4=new TableColumn(table,SWT.NONE);
column4.setText("班級");
column4.setWidth(100);
//創建按鈕容器
Composite post=new Composite(shell,SWT.NONE);
Button button1=new Button(post,SWT.NONE);
//創建按鈕
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("刪除");
button2.setBounds(200,30,100,50);
button2.setFont(new Font(display,"宋體",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("查詢");
button4.setBounds(200,150,100,50);
//table初始化
new TableItem(table,SWT.LEFT).setText(new String[]{"10","張三","60","08樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"11","李四","90","09電本"});
new TableItem(table,SWT.LEFT).setText(new String[]{"12","王倩","70","08計本"});
new TableItem(table,SWT.LEFT).setText(new String[]{"13","李明","80","09樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"14","劉德華","50","08機電"});
new TableItem(table,SWT.LEFT).setText(new String[]{"15","范偉","40","09樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"16","朱元璋","70","08經貿"});
new TableItem(table,SWT.LEFT).setText(new String[]{"17","周星馳","65","09樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"18","李連杰","55","08樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"19","趙薇","78","09樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"20","林心如","70","08機械"});
new TableItem(table,SWT.LEFT).setText(new String[]{"21","周潤發","88","09樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"22","成龍","73","08漢語言"});
new TableItem(table,SWT.LEFT).setText(new String[]{"23","趙本山","80","09樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"24","郭德綱","56","08小品"});
new TableItem(table,SWT.LEFT).setText(new String[]{"25","周迅","35","09樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"26","王絡丹","49","08土木"});
new TableItem(table,SWT.LEFT).setText(new String[]{"27","劉亦菲","60","09樓宇"});
new TableItem(table,SWT.LEFT).setText(new String[]{"28","張靜初","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樓宇"});
//為添加按鈕添加事件處理
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);
}
});
//為刪除按鈕添加事件處理
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("請選擇要刪除的內容");
box.open();
}
else
{
int[] selInices = table.getSelectionIndices();//將選中的序號放在數組中
table.remove(selInices);
}
}
});
//為修改按鈕添加事件處理
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("請選擇要修改的內容");
box.open();
}
else
{
ModifyStudentUI.modifyStuShow(display, table);
}
}
});
//為查找按鈕添加事件處理
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();
}
}
}
}
//添加學生信息窗體
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("添加學生信息");
//添加標簽
Label id=new Label(shell,SWT.NONE);
id.setText("學號");
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("成績");
score.setBounds(40,150,60,40);
Label cls=new Label(shell,SWT.NONE);
cls.setText("班級");
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);//學號必須是兩位
final Text text2=new Text(shell,SWT.NONE);
text2.setBounds(100,95,100,25);
text2.setTextLimit(6);//姓名最多為三位
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);
//添加按鈕
Button button1=new Button(shell,SWT.NONE);
button1.setText("確定");
button1.setBounds(55,250,60,40);
Button button2=new Button(shell,SWT.NONE);
button2.setText("取消");
button2.setBounds(135,250,60,40);
//為確定按鈕添加事件處理，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("輸入信息無效");
box.open();
}
}
});
//為取消按鈕添加事件處理
button2.addSelectionListener(new SelectionAdapter(){
public void widgetSelected(SelectionEvent e)
{
shell.close();
}
});
shell.open();
}
}
//修改學生窗體
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("修改學生信息");
//添加標簽
Label id=new Label(shell,SWT.NONE);
id.setText("學號");
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("成績");
score.setBounds(40,150,60,40);
Label cls=new Label(shell,SWT.NONE);
cls.setText("班級");
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));
//添加按鈕
Button button1=new Button(shell,SWT.NONE);
button1.setText("確定");
button1.setBounds(55,250,60,40);
Button button2=new Button(shell,SWT.NONE);
button2.setText("取消");
button2.setBounds(135,250,60,40);
//為確定按鈕添加事件處理，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("輸入信息無效");
box.open();
}
}
});
//為取消按鈕添加事件處理
button2.addSelectionListener(new SelectionAdapter(){
public void widgetSelected(SelectionEvent e)
{
shell.close();
}
});
shell.open();
}
}
//查詢學生窗體
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("查詢學生信息");
//添加標簽
Label shuoming=new Label(shell,SWT.NONE);
shuoming.setText("請輸入所要查詢的信息，至少輸入一項");
shuoming.setFont(new Font(display,"宋體",10,SWT.BOLD));
shuoming.setBounds(10,30,245,20);
Label id=new Label(shell,SWT.NONE);
id.setText("請輸入要查詢的學號");
id.setBounds(20,70,120,40);
Label name=new Label(shell,SWT.NONE);
name.setText("請輸入要查詢的姓名");
name.setBounds(20,120,120,40);
Label score=new Label(shell,SWT.NONE);
score.setText("請輸入要查詢的成績");
score.setBounds(20,170,120,40);
Label cls=new Label(shell,SWT.NONE);
cls.setText("請輸入要查詢的班級");
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);
//添加按鈕
Button button1=new Button(shell,SWT.NONE);
button1.setText("確定");
button1.setBounds(55,270,60,40);
Button button2=new Button(shell,SWT.NONE);
button2.setText("取消");
button2.setBounds(135,270,60,40);
//為確定按鈕添加事件處理
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("請至少輸入一項信息");
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，沒有你所要查詢的信息");
box.open();
}
}
if(flag)
{
shell.close();
}
}
});
//為取消按鈕添加事件處理
button2.addSelectionListener(new SelectionAdapter(){
public void widgetSelected(SelectionEvent e)
{
shell.close();
}
});
shell.open();
}
}