import java.util.*; import java.awt.event.*; import java.awt.*; import javax.swing.*; import java.io.*; class 商品 extends Panel {String 代号,名称;int 库存;float 单价; 商品(String 代号,String 名称,int 库存,float 单价) {this.代号=代号;this.名称=名称;this.库存=库存;this.单价=单价; } } class ShowWin extends JFrame implements ActionListener { Hashtable hashtable=null; JTextField 代号文本框=new JTextField(), 名称文本框=new JTextField(), 库存文本框=new JTextField(), 单价文本框=new JTextField(), 查询文本框=new JTextField(), 查询信息文本框=new JTextField(), 删除文本框=new JTextField(); JButton b_add=new JButton("添加商品"), b_del=new JButton("删除商品"), b_xun=new JButton("查询商品"), b_xiu=new JButton("修改商品"), b_show=new JButton("显示商品清单"); JTextArea 显示区=new JTextArea(25,10); ShowWin() {super("仓库管理窗口"); hashtable=new Hashtable(); Container con=getContentPane(); JScrollPane pane=new JScrollPane(显示区); 显示区.setEditable(false); JPanel save=new JPanel(); save.setLayout(new GridLayout(8,2)); save.add(new Label("输入代号:")); save.add(代号文本框); save.add(new Label("输入名称:")); save.add(名称文本框); save.add(new Label("输入库存:")); save.add(库存文本框); save.add(new Label("输入单价:")); save.add(单价文本框); 

save.add(new Label("单击添加:")); save.add(b_add); save.add(new Label("单击修改:")); save.add(b_xiu); save.add(new Label("输入查询代号:")); save.add(查询文本框); save.add(new Label("单击查询:")); save.add(b_xun); JPanel del=new JPanel(); del.setLayout(new GridLayout(2,2)); del.add(new Label("输入删除的代号:")); del.add(删除文本框); del.add(new Label("单击删除:")); del.add(b_del); JPanel show=new JPanel(); show.setLayout(new BorderLayout()); show.add(pane,BorderLayout.CENTER); show.add(b_show,BorderLayout.SOUTH); JSplitPane split_one,split_two; split_one=new JSplitPane(JSplitPane.VERTICAL_SPLIT,save,del); split_two=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,true,split_one,show); con.add(split_two,BorderLayout.CENTER); JPanel xun=new JPanel(); xun.add(new Label("所得信息:")); xun.add(查询信息文本框); xun.setLayout(new GridLayout(2,1)); con.add(xun,BorderLayout.SOUTH); b_add.addActionListener(this); b_del.addActionListener(this); b_xun.addActionListener(this); b_xiu.addActionListener(this); b_show.addActionListener(this); } public void actionPerformed(ActionEvent e) {if(e.getSource()==b_add) {String daihao=null,mingcheng=null;int kucun=0;float danjia=0.0f; daihao=代号文本框.getText();mingcheng=名称文本框.getText(); kucun=Integer.parseInt(库存文本框.getText()); danjia=Float.valueOf(单价文本框.getText()).floatValue(); 商品 goods=new 商品(daihao,mingcheng,kucun,danjia); hashtable.put(daihao,goods); 

try{FileOutputStream file=new FileOutputStream("goods.txt"); ObjectOutputStream out=new ObjectOutputStream(file); out.writeObject(hashtable); out.close(); } catch(IOException event){} } else if(e.getSource()==b_del) {String daihao1=删除文本框.getText(); try{FileInputStream come_in=new FileInputStream("goods.txt"); ObjectInputStream in=new ObjectInputStream(come_in); hashtable=(Hashtable)in.readObject(); ////// in.close(); } catch(ClassNotFoundException event){} catch(IOException event){} 商品 temp=(商品)hashtable.get(daihao1); {hashtable.remove(daihao1);} try{FileOutputStream file=new FileOutputStream("goods.txt"); ObjectOutputStream out =new ObjectOutputStream(file); out.writeObject(hashtable);// out.close(); } catch(IOException event){} } // else if(e.getSource()==b_xun) { String aa; aa=查询文本框.getText(); 查询信息文本框.setText(null); try{FileInputStream come_in=new FileInputStream("goods.txt"); ObjectInputStream in =new ObjectInputStream(come_in); hashtable=(Hashtable)in.readObject(); //// in.close(); } catch(ClassNotFoundException event){} catch(IOException event){} 商品 a=(商品)hashtable.get(aa); 查询信息文本框.setText(" 代号："+a.代号+" 名称："+a.名称+" 库存："+a.库存+" 单价： "+a.单价); } // else if(e.getSource()==b_xiu) 

{ String bb; bb=代号文本框.getText(); try{FileInputStream come_in=new FileInputStream("goods.txt"); ObjectInputStream in=new ObjectInputStream(come_in); hashtable=(Hashtable)in.readObject(); ////// in.close(); } catch(ClassNotFoundException event){} catch(IOException event){} 商品 temp=(商品)hashtable.get(bb); {hashtable.remove(bb);} try{FileOutputStream file=new FileOutputStream("goods.txt"); ObjectOutputStream out =new ObjectOutputStream(file); out.writeObject(hashtable);// out.close(); } catch(IOException event){} String daihao1=null,mingcheng1=null;int kucun1=0;float danjia1=0.0f; daihao1=代号文本框.getText();mingcheng1=名称文本框.getText(); kucun1=Integer.parseInt(库存文本框.getText()); danjia1=Float.valueOf(单价文本框.getText()).floatValue(); 商品 goods1=new 商品(daihao1,mingcheng1,kucun1,danjia1); hashtable.put(daihao1,goods1); try{FileOutputStream file=new FileOutputStream("goods.txt"); ObjectOutputStream out=new ObjectOutputStream(file); out.writeObject(hashtable); out.close(); } catch(IOException event){} } // else if(e.getSource()==b_show) { 显示区.setText(null); try{FileInputStream come_in=new FileInputStream("goods.txt"); ObjectInputStream in =new ObjectInputStream(come_in); hashtable=(Hashtable)in.readObject(); //// } catch(ClassNotFoundException event){} catch(IOException event){} Enumeration enum=hashtable.elements(); while(enum.hasMoreElements()) { 商品 te=(商品)enum.nextElement(); 

显示区.append("商品代号:"+te.代号+" "); 显示区.append("商品名称:"+te.名称+" "); 显示区.append("商品库存:"+te.库存+" "); 显示区.append("商品单价:"+te.单价+" "); 显示区.append("\n "); } } } } public class LinkListFour {public static void main(String args[]) { ShowWin win=new ShowWin(); win.setSize(400,350); win.setVisible(true); win.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) { System.exit(0);}}); } }