一丶芈-的个人资料

WEB开发的问题，显示用户以前浏览过的记录,大神求教啊写完了，但是显示不对第一次点开书，回来刷新显示是第一本书的浏览记录，在点一本回来刷新，记录上两次都是第二本书了，在点回来同上，显示3次记录都是最后点击的那本书! public class CookieTest1 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter pw=response.getWriter(); //显示商店所有商品 pw.write("所有书籍目录 "); Set<Map.Entry<String, Book>> set=DB.getAll().entrySet(); for(Map.Entry<String, Book> me:set){ Book book= me.getValue(); pw.write("<a href='/day07/servlet/CookieTest2?id="+book.getId()+"'target='_blank'>"+book.getName()+"</a>"); pw.write(" "); } //显示用户曾经浏览过的商品 pw.write("您曾经的访问过的书籍 "); Cookie cookies[] =request.getCookies(); for(int i=0;cookies!=null && i<cookies.length;i++){ Cookie cookie=cookies[i]; if(cookie.getName().equals("nigeiwode")){ String c=cookie.getValue(); String cc[]=c.split("\\_"); for(String id:cc){ Book book=(Book)DB.getAll().get(id); pw.write(book.getName()+" "); } } } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } } class DB{ private static Map<String ,Book> map = new LinkedHashMap(); static { map.put("1", new Book("JAVA WEB开发","1","89","好书")); map.put("2", new Book("JAVA J2SE开发","2","36","好书")); map.put("3", new Book("JAVA Android","3","23","好书")); map.put("4", new Book("数据库开发","4","66","好书")); } public static Map getAll(){ return map; } } class Book{ privateString name; private String id; private String price; private String info; public Book() { } public Book(String name, String id, String price, String info) { this.name = name; this.id = id; this.price = price; this.info = info; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getPrice() { return price; } public void setPrice(String price) { this.price = price; } public String getInfo() { return info; } public void setInfo(String info) { this.info = info; } } ----------------------------------- public class CookieTest2 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter pw=response.getWriter(); //更具用户传过来的ID号显示商品的详细信息 String id =request.getParameter("id"); Book book=(Book)DB.getAll().get(id); pw.write("商品的详细信息"+" "); pw.write(book.getName()+" "); pw.write(book.getPrice()+" "); pw.write(book.getInfo()+" "); //给用户送回包含商品ID的COOKIE String books= bookcookie(request,id); Cookie cookie=new Cookie("nigeiwode",books); response.addCookie(cookie); } //下面这个方法是让每次的记录都显示在第一位 private String bookcookie(HttpServletRequest request, String id) { String temp=null; Cookie cookies[]=request.getCookies(); for(int i=0;cookies!=null&&i<cookies.length;i++){ if(cookies[i].getName().equals("nigeiwode")){ temp=cookies[i].getValue(); } } if(temp==null){ return id; } List list= Arrays.asList(temp.split("\\_"));//把TEMP转成集合数组 LinkedList<String> llist=new LinkedList(); llist.addAll(list); if(llist.contains(id)){ llist.remove(id); llist.addFirst(id); }else{ if(llist.size()>=3){ llist.removeLast(); llist.addFirst(id); }else{ llist.addFirst(id); } } StringBuffer sb=new StringBuffer(); for(String lid:llist){ sb.append(id + "_"); } return sb.deleteCharAt(sb.length()-1).toString(); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } }

javaSocket问题 import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.ServerSocket; import java.net.Socket; public class TestServer { public static void main(String [] args) throws IOException{ ServerSocket ss=new ServerSocket(6669); InputStream is=null; OutputStream os=null; Socket socket=ss.accept(); is=socket.getInputStream(); os=socket.getOutputStream(); DataOutputStream dos=new DataOutputStream(os); DataInputStream dis=new DataInputStream(is); String s=null; if((s=dis.readUTF())!=null){ System.out.println(s); System.out.println(socket.getInetAddress()); } dos.writeUTF("i*am server:hello"); dis.close(); dos.close(); socket.close(); } } public class TestClient { public static void main(String [] args) throws UnknownHostException, IOException { InputStream is=null; OutputStream os=null; Socket socket=new Socket("192.168.0.101",6669); is=socket.getInputStream(); os=socket.getOutputStream(); DataInputStream dis=new DataInputStream(is); DataOutputStream dos=new DataOutputStream(os); dos.writeUTF("hello,server"); String s=null; if((s=dis.readUTF())!=null){ System.out.println(s); } dos.close(); dis.close(); socket.close(); } } 结果只显示 i*am server:hello 这是怎么回事

斗地主洗牌，顺序发牌问题，求大神........... public class PUKE { static int [] tags=new int[54]; static String[] cards= {"方块2","方块3","方块4","方块5","方块6","方块7","方块8","方块9","方块10","方块J","方块Q","方块k","方块A" ,"黑桃2","黑桃3","黑桃4","黑桃5","黑桃6","黑桃7","黑桃8","黑桃9","黑桃10","黑桃J","黑桃Q","黑桃","黑桃A" ,"红桃2","红桃3","红桃4","红桃5","红桃6","红桃7","红桃8","红桃9","红桃10","红桃J","红桃Q","红桃k","红桃A", "麻花2","麻花3","麻花4","麻花5","麻花6","麻花7","麻花8","麻花9","麻花10","麻花J","麻花Q","麻花k","麻花A","小王","大王"}; /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub int i=0; int current=1;//当前摸牌人 for(i=0;i<54;i++) tags[i]=0; for(i=0;i<51;i++) { Random rm=new Random(); int temp=rm.nextInt(54); if(tags[temp]!=0) { i--; continue; } else { tags[temp]=current%3+1; current++; } } showW(1);showW(2);showW(3);showW(0); } private static void showW(int w) { int i=0; if(w==0) System.out.print("底牌："); else System.out.print("玩家"+w+"："); for(i=0;i<54;i++) { if(tags[i]==w) System.out.print(cards[i]+" "); } System.out.println(); } } 这是洗牌发牌，发的牌是乱的怎么样发完之后排序显示；求解答，本人新手。

<转.>累了一天了，能笑就笑笑吧，程序猿的幽默；【小姐你好，我是程序员】“小姐你好，我是程序员。”女生礼貌地回答:“你好，程先生。”男:“……哦，叫我序员就可以了。” 一个程序员退休之后决定学习书法，买来上好的湖笔、宣纸、墨汁，饱蘸浓墨，在纸上一气呵成：hello, world 一位程序员去海边游泳，由于水性不佳，游不回岸了，于是他挥着手臂，大声求救：“F1！ F1！” A、B、C三个公司的员工在一起聊天，A公司员工：中秋快到了，俺们公司发了月饼，你们公司发什么？B公司员工：我们发了购物券。两人一起看向C公司员工：你们公司发啥？C公司员工：发了封邮件……

！ <转>程序猿：如果我死了，应该写什么墓志铭，程序猿的幽默。

本人新手，出了点问题..监听器不管用. public class Registration extends JDialog{ private JTextField txt_name=new JTextField(10); private JPasswordField txt_password=new JPasswordField(10); private JPasswordField txt_password2=new JPasswordField(10); private JTextField txt_email=new JTextField(15); private JRadioButton rb_f=new JRadioButton("女"); private JRadioButton rb_m=new JRadioButton("男"); private JButton zc=new JButton("确定"); private JButton qx=new JButton("取消"); private class QXListener implements ActionListener{ public void actionPerformed(ActionEvent arg0) { // TODO Auto-generated method stub System.exit(0); } } private class ZCListener implements ActionListener{ public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub String user_id,user_pwd,user_pwd2; user_id=txt_name.getText(); if(!(user_id.charAt(0)<'a'||user_id.charAt(0)>'z')){ JOptionPane.showMessageDialog(null, "用户名错误");//这句我输入数字也不提示。 } } } Registration(){ JPanel pane=new JPanel(); pane.setLayout(new GridLayout(7,1)); //用户名面板效果 JPanel user_name=new JPanel(new FlowLayout(FlowLayout.LEFT)); user_name.add(new JLabel("用户名 :")); user_name.add(txt_name); pane.add(user_name); //密码面板 JPanel user_password=new JPanel(new FlowLayout(FlowLayout.LEFT)); user_password.add(new JLabel("密码:")); user_password.add(txt_password); pane.add(user_password); //重复密码面板 JPanel user_password2=new JPanel(new FlowLayout(FlowLayout.LEFT)); user_password2.add(new JLabel("重复密码:")); user_password2.add(txt_password2); pane.add(user_password2); //性别面板 JPanel user_sex=new JPanel(new FlowLayout(FlowLayout.LEFT)); user_sex.add(new JLabel("性别:")); user_sex.add(rb_f); user_sex.add(rb_m); ButtonGroup bg=new ButtonGroup(); bg.add(rb_f); bg.add(rb_m); pane.add(user_sex); //邮箱面板 JPanel user_email=new JPanel(new FlowLayout(FlowLayout.LEFT)); user_email.add(new JLabel("邮箱:")); user_email.add(txt_email); pane.add(user_email); JPanel user_zc=new JPanel(new FlowLayout(FlowLayout.CENTER)); user_zc.add(zc); user_zc.add(qx); pane.add(user_zc); this.setContentPane(pane); this.setSize(300,500); this.pack(); this.setVisible(true); qx.addActionListener(new QXListener()); } } 第二个监听器哪做错了么？？就是不提示。。还有密码检测怎么做。。接收到的是char[]型的。。