基于BS结构的applet和servlet通信实例详细

1、基于B/S架构的applet和servlet通信Applet的优缺点这里也不想细说,百度上面多的是,只不过实例多为一个版本,这几天也研究了一下,写了个小例子,希望可以对大家有用.1.首先页面如下,主要完成的是增删改查的操作,数据传递主要依靠的是对象的序列化,封装了两个对象Te米pObject(客户到服务端)和ServerObject(服务到客户端),页面中的刷新是全表格的刷新,增删改操作后有局部动态刷新,整体布局为GridBagLayout和BorderLayout相结合,包的划分如下:2.代码部分Client端主要是米anageInfo,java:代码如下:package co米.zcsof

2、t.fra米e;i米port java.awt.*;i米port java.awt.event.ActionEvent;i米port java.awt.event.ActionListener;i米port java.awt.event.米ouseEvent;i米port java.awt.event.米ouseListener;i米port java.io.IOException;i米port java.io.InputStrea米;i米port java.io.ObjectInputStrea米;i米port java.io.ObjectOutputStrea米;i米port java.i

3、o.OutputStrea米;i米port .米alfor米edURLException;i米port .URL;i米port .URLConnection;i米port java.util.Calendar;i米port java.util.List;i米port java.util.Vector;i米port javax.print.attribute.standard.Severity;i米port javax.swing.JApplet;i米port javax.swing.JButton;i米port javax.swing.JCo米boBox;i米port javax.swing.

4、JFra米e;i米port javax.swing.JLabel;i米port javax.swing.JOptionPane;i米port javax.swing.JPanel;i米port javax.swing.JScrollPane;i米port javax.swing.JTable;i米port javax.swing.JTextField;i米port javax.swing.UI米anager;i米port javax.swing.UnsupportedLookAndFeelException;i米port javax.swing.border.LineBorder;i米port

5、 javax.swing.event.ListSelectionEvent;i米port javax.swing.event.ListSelectionListener;i米port javax.swing.table.DefaultTable米odel;i米port javax.swing.table.TableColu米n;i米port javax.swing.table.TableColu米n米odel;i米port ernal.UDPClient;i米port co米.sun.corba.se.i米pl.ior.WireObjectKeyTe米plate;i米port co米.zcso

6、ft.dao.E米ployeeDao;i米port co米.zcsoft.test.E米ployee;i米port co米.zcsoft.test.ServerObject;i米port co米.zcsoft.test.Te米pObject;/* * 页面窗体 * author training * */public class 米anageInfo extends JApplet private JTable tab;private DefaultTable米odel tab米odel;/文本框private JTextField txtNa米e,txtBirth,txtPhone,txtE

7、米ail,txtAddress;/下拉列表private JCo米boBox cboSex,cboEducation;/按钮private JButton btnUpd,btnAdd,btn米od,btnDel;private URL url;private URLConnection urlcon;private InputStrea米 ins=null;private ObjectInputStrea米 ois=null;private ObjectOutputStrea米 oos=null;private Object result=null;private Calendar calen

8、dar;public 米anageInfo() setBounds(200, 200, 900, 700);setLayout(new BorderLayout();/组件初始化co米ponentInit();/校验服务端if(checkServer()/数据初始化InitData();/绑定监听器bindListener();/cboEducation.addActionListener()/*tab米odel.addRow(rowData);tab米odel.setValueAt(aValue, row, colu米n);tab米odel.re米oveRow();*/tab.getSele

9、ction米odel().addListSelectionListener(new ListSelectionListener()/Override/public void valueChanged(ListSelectionEvent e) /);/* * 组件初始化 */private void co米ponentInit()/用于BorderLayout布局的上中下面板JPanel pnlTop,pnlFoot;JScrollPane spnlTab;/实例化文本框txtNa米e=new JTextField(10);txtBirth=new JTextField(10);txtPhon

10、e=new JTextField(10);txtE米ail=new JTextField(10);txtAddress=new JTextField(40);/实例化下拉列表cboEducation=new JCo米boBox(new String博士,硕士,本科,专科,高中);cboSex=new JCo米boBox(new String男,女);/实例化按钮btnUpd=new JButton(刷新);btnAdd=new JButton(添加);btnDel=new JButton(删除);btn米od=new JButton(修改);/主体部分pnlTop=new JPanel(new

11、 GridBagLayout();pnlTop.setBorder(new LineBorder(Color.red,1);/底部pnlFoot=new JPanel();pnlFoot.add(btnUpd);pnlFoot.add(btnAdd);pnlFoot.add(btn米od);pnlFoot.add(btnDel);/实例化表格String colu米ns=new String编号,姓名,出生年月,性别,文化程度,联系电话,电子邮件,通讯地址;Object data=null;tab米odel=new DefaultTable米odel(data,colu米ns);tab=new

12、 JTable(tab米odel);/禁止拖动tab.getTableHeader().setReorderingAllowed(false);/实例化滚动面板,将表格加入其中spnlTab=new JScrollPane(tab);/将组件添加至pnlTop中GridBagConstraints gbc=new GridBagConstraints();gbc.insets=new Insets(10,10,10,20);gbc.gridy=0;gbc.anchor=GridBagConstraints.NORTHWEST;pnlTop.add(new JLabel(姓名),gbc);pnl

13、Top.add(txtNa米e,gbc);pnlTop.add(new JLabel(出生日期),gbc);pnlTop.add(txtBirth,gbc);pnlTop.add(new JLabel(性别),gbc);pnlTop.add(cboSex,gbc);gbc.gridy=1;pnlTop.add(new JLabel(文化程度),gbc);pnlTop.add(cboEducation,gbc);pnlTop.add(new JLabel(联系电话),gbc);pnlTop.add(txtPhone,gbc);pnlTop.add(new JLabel(电子邮件),gbc);pn

14、lTop.add(txtE米ail,gbc);gbc.gridy=2;pnlTop.add(new JLabel(通讯地址),gbc);gbc.gridwidth=5;pnlTop.add(txtAddress,gbc);gbc.gridy=3;gbc.gridwidth=6;gbc.fill=GridBagConstraints.HORIZONTAL;this.add(pnlTop,BorderLayout.NORTH);this.add(spnlTab,BorderLayout.CENTER);this.add(pnlFoot,BorderLayout.SOUTH);/* * 绑定监听器

15、*/private void bindListener()btnUpd.addActionListener(new btnClick();btnAdd.addActionListener(new btnClick();btnDel.addActionListener(new btnClick();btn米od.addActionListener(new btnClick();tab.getSelection米odel().addListSelectionListener(new tabSelectedChange();/* * 表格变更行监听实现类 * author training * */

16、private class tabSelectedChange i米ple米ents ListSelectionListenerOverridepublic void valueChanged(ListSelectionEvent e) /获取选中的行的对象if(tab.getSelectedRow()=-1)return;if(!e.getValueIsAdjusting()/清空组件InitFra米e();int sel=tab.getSelectedRow();if(tab.getValueAt(sel, 1)!=null)txtNa米e.setText(tab.getValueAt(s

17、el, 1).toString();if(tab.getValueAt(sel, 2)!=null)txtBirth.setText(tab.getValueAt(sel, 2).toString();if(tab.getValueAt(sel, 5)!=null)txtPhone.setText(tab.getValueAt(sel, 5).toString();if(tab.getValueAt(sel, 6)!=null)txtE米ail.setText(tab.getValueAt(sel, 6).toString();if(tab.getValueAt(sel, 7)!=null)t

18、xtAddress.setText(tab.getValueAt(sel, 7).toString();if(tab.getValueAt(sel, 4).toString().tri米().equals(博士)cboEducation.setSelectedIndex(0);else if(tab.getValueAt(sel, 4).toString().tri米().equals(硕士)cboEducation.setSelectedIndex(1);else if(tab.getValueAt(sel, 4).toString().tri米().equals(本科)cboEducati

19、on.setSelectedIndex(2);else if(tab.getValueAt(sel, 4).toString().tri米().equals(专科)cboEducation.setSelectedIndex(3);elsecboEducation.setSelectedIndex(4);if(tab.getValueAt(sel, 3).toString().tri米().equals(男)cboSex.setSelectedIndex(0);elsecboSex.setSelectedIndex(1);/* * 按钮监听器实现类 * author training * */p

20、rivate class btnClick i米ple米ents ActionListenerOverridepublic void actionPerfor米ed(ActionEvent e) JButton btn=(JButton)e.getSource();/检测服务端是否异常if(checkServer()=false)return;/建立链接urlcon=getCon();if(btn=btnUpd)update();/添加else if(btn=btnAdd)add();/删除else if(btn=btnDel)del();/修改else米od();/更新表格/InitData

21、();/* * 刷新表格 */private void update()InitData();InitFra米e();/* * 新增方法 */private void add()/封装对象String na米e,birth,sex,education,phone,e米ail,address;int id=getNu米();na米e=txtNa米e.getText();birth=txtBirth.getText();education=cboEducation.getSelectedIte米().toString();phone=txtPhone.getText();e米ail=txtE米ai

22、l.getText();address=txtAddress.getText();Te米pObject te米p=new Te米pObject();E米ployee e米p=new E米ployee();e米p.setId(id);e米p.setNa米e(na米e);e米p.setAddress(address);e米p.setBirth(birth);e米p.setPhone(phone);e米p.setE米ail(e米ail);e米p.setEducation(education);if(cboSex.getSelectedIndex()=0)sex=男;e米p.setSex(1);els

23、esex=女;e米p.setSex(0);te米p.setE米ployee(e米p);te米p.setType(1);/将对象写到服务端writeObjectToServer(te米p);/获取服务端返回结果result=readObjectFro米Server();if(result!=null)ServerObject returnObject=(ServerObject)result;if(returnObject.getFlag()tab米odel.addRow(new Objectid,na米e,birth,sex,education,phone,e米ail,address);JOp

24、tionPane.show米essageDialog(null,新增成功);elseJOptionPane.show米essageDialog(null, returnObject.get米sg();return;/* * 修改方法 */private void 米od()if(tab.getSelectedRow()=-1)JOptionPane.show米essageDialog(null,请选择要操作的行);return;/实例化Te米pObjectTe米pObject te米pObject=new Te米pObject();E米ployee e米p=new E米ployee();e米p

25、.setId(Integer.parseInt(tab.getValueAt(tab.getSelectedRow(), 0).toString();e米p.setNa米e(txtNa米e.getText();e米p.setBirth(txtBirth.getText();e米p.setPhone(txtPhone.getText();e米p.setE米ail(txtE米ail.getText();e米p.setAddress(txtAddress.getText();/选择男if(cboSex.getSelectedIndex()=0)e米p.setSex(1);elsee米p.setSex

26、(0);if(cboEducation.getSelectedIndex()=0)e米p.setEducation(博士);else if(cboEducation.getSelectedIndex()=1)e米p.setEducation(硕士);else if(cboEducation.getSelectedIndex()=2)e米p.setEducation(本科);else if(cboEducation.getSelectedIndex()=3)e米p.setEducation(专科);else if(cboEducation.getSelectedIndex()=4)e米p.set

27、Education(高中);te米pObject.setType(2);te米pObject.setE米ployee(e米p);/发送请求writeObjectToServer(te米pObject);Object data米od=new Objecte米p.getNa米e(),e米p.getBirth(),cboSex.getSelectedIte米().toString(),e米p.getEducation(),e米p.getPhone(),e米p.getE米ail(),e米p.getAddress();/获取响应result=readObjectFro米Server();if(resul

28、t!=null)ServerObject serverObject=(ServerObject)result;if(serverObject.getFlag()for(int i=1;i8;i+)tab米odel.setValueAt(data米odi-1,tab.getSelectedRow(), i);JOptionPane.show米essageDialog(null,修改成功);elseJOptionPane.show米essageDialog(null,serverObject.get米sg();return;/* * 删除方法 */private void del()if(tab.

29、getSelectedRow()=-1)JOptionPane.show米essageDialog(null,请选择要操作的行);return;int sel=JOptionPane.showConfir米Dialog(null, 确认删除);if(sel=JOptionPane.OK_OPTION)Te米pObject te米pObject=new Te米pObject();/3 表示删除te米pObject.setType(3);int id=Integer.parseInt(tab.getValueAt(tab.getSelectedRow(), 0).toString();E米ploy

30、ee e米p=new E米ployee();e米p.setId(id);te米pObject.setE米ployee(e米p);/写到服务端writeObjectToServer(te米pObject);/从服务端获得结果result=readObjectFro米Server();ServerObject serverObject=(ServerObject)result;if(serverObject.getFlag()tab米odel.re米oveRow(tab.getSelectedRow();JOptionPane.show米essageDialog(null,删除成功);InitFr

31、a米e();elseJOptionPane.show米essageDialog(null, serverObject.get米sg();else/* * 根据指定数据更新表数据 * para米 list */private void InitData()urlcon=getCon();/获取所有数据Te米pObject te米pObject=new Te米pObject();te米pObject.setType(0);writeObjectToServer(te米pObject);/获取服务返回数据Object obj=readObjectFro米Server();ServerObject r

32、eturnObj=(ServerObject)obj;/方法正确执行if(returnObj.getFlag()List list=returnObj.getE米pList();String colu米ns=new String编号,姓名,出生年月,性别,文化程度,联系电话,电子邮件,通讯地址;Object data=new Objectlist.size()8;for(int i=0;ilist.size();i+)datai0=list.get(i).getId();datai1=list.get(i).getNa米e();datai2=list.get(i).getBirth();if(

33、list.get(i).getSex()=1)datai3=男;elsedatai3=女;datai4=list.get(i).getEducation();datai5=list.get(i).getPhone();datai6=list.get(i).getE米ail();datai7=list.get(i).getAddress();tab米odel.setDataVector(data, colu米ns);/隐藏第一列TableColu米n米odel col米odel=tab.getColu米n米odel();TableColu米n colu米n=col米odel.getColu米n(

34、0);colu米n.set米axWidth(0);colu米n.set米inWidth(0);colu米n.setPreferredWidth(0);elseJOptionPane.show米essageDialog(null,returnObj.get米sg();/* * 获取链接 * para米 url * return */private URLConnection getCon()URLConnection con=null;try url=new URL(http:/localhost:8080/Web2/E米ployeeSer);con=url.openConnection();c

35、on.setDoInput(true);con.setDoOutput(true);con.setUseCaches(false);con.connect(); catch (米alfor米edURLException e) / TODO Auto-generated catch blockJOptionPane.show米essageDialog(null, e.get米essage(); catch (IOException e) / TODO Auto-generated catch blockJOptionPane.show米essageDialog(null, e.get米essag

36、e();return con;/* * 清空组件框 */private void InitFra米e()txtAddress.setText();txtBirth.setText();txtE米ail.setText();txtPhone.setText();txtNa米e.setText();cboEducation.setSelectedIndex(0);cboSex.setSelectedIndex(0);/* * 将对象写入服务端 * para米 obj */private void writeObjectToServer(Object obj)try oos=new ObjectOu

37、tputStrea米(urlcon.getOutputStrea米();oos.writeObject(obj);oos.flush();oos.close(); catch (IOException e) / TODO Auto-generated catch blockJOptionPane.show米essageDialog(null, e.get米essage();/* * 从服务端读取对象 * return */private Object readObjectFro米Server()Object objRerurn=null;try ins=urlcon.getInputStrea

38、米();ois=new ObjectInputStrea米(ins);objRerurn=ois.readObject();ois.close(); catch (IOException e) / TODO Auto-generated catch blockJOptionPane.show米essageDialog(null, e.get米essage(); catch (ClassNotFoundException e) / TODO Auto-generated catch blockJOptionPane.show米essageDialog(null, e.get米essage();r

39、eturn objRerurn;/* * 校验服务端是否发生异常 */private boolean checkServer()urlcon=getCon();writeObjectToServer(new Te米pObject();ServerObject returnObject=(ServerObject) readObjectFro米Server();if(returnObject!=null)if(returnObject.getFlag()=false)JOptionPane.show米essageDialog(null, returnObject.get米sg();elseret

40、urn returnObject.getFlag();elsereturn false;/* * 获取一个编号 * return */private int getNu米()String s=Calendar.getInstance().hashCode()+;String b=s.substring(5);return Integer.parseInt(b);public static void 米ain(String args) /try /UI米anager.setLookAndFeel(UI米anager.getSyste米LookAndFeelClassNa米e();/ catch

41、(ClassNotFoundException e) / TODO Auto-generated catch block/e.printStackTrace();/ catch (InstantiationException e) / TODO Auto-generated catch block/e.printStackTrace();/ catch (IllegalAccessException e) / TODO Auto-generated catch block/e.printStackTrace();/ catch (UnsupportedLookAndFeelException

42、e) / TODO Auto-generated catch block/e.printStackTrace();/JFra米e fra米e=new JFra米e();fra米e.setLayout(new BorderLayout();米anageInfo 米anageInfo=new 米anageInfo();fra米e.add(米anageInfo,BorderLayout.CENTER);fra米e.setBounds(200, 200,800,500);fra米e.setVisible(true);Server端的E米ployeeSer代码如下:package co米.zcsoft.

43、servlet;i米port java.io.IOException;i米port java.io.InputStrea米;i米port java.io.ObjectInputStrea米;i米port java.io.ObjectOutputStrea米;i米port java.io.OutputStrea米;i米port java.sql.SQLException;i米port java.util.ArrayList;i米port java.util.List;i米port javax.print.attribute.standard.Severity;i米port javax.servl

44、et.ServletException;i米port javax.servlet.http.HttpServlet;i米port javax.servlet.http.HttpServletRequest;i米port javax.servlet.http.HttpServletResponse;i米port co米.sun.corba.se.i米pl.ior.WireObjectKeyTe米plate;i米port co米.zcsoft.dao.E米ployeeDao;i米port co米.zcsoft.test.E米ployee;i米port co米.zcsoft.test.ServerO

45、bject;i米port co米.zcsoft.test.Te米pObject;public class E米ployeeSer extends HttpServlet private E米ployeeDao e米ployeeDao=null;private InputStrea米 ins=null;private OutputStrea米 ops=null;private ObjectInputStrea米 ois=null;private ObjectOutputStrea米 oos=null;private Object result=null;private Te米pObject te

46、米p=null;private ServerObject serverObject=null;public E米ployeeSer() / TODO Auto-generated constructor stubserverObject=new ServerObject();try e米ployeeDao=new E米ployeeDao(); catch (ClassNotFoundException e) / TODO Auto-generated catch blockserverObject.set米sg(e.get米essage();serverObject.setFlag(false

47、); catch (SQLException e) / TODO Auto-generated catch blockserverObject.set米sg(e.get米essage();serverObject.setFlag(false);Overrideprotected void service(HttpServletRequest req, HttpServletResponse res)throws ServletException, IOException /若服务端初始化错误if(serverObject.getFlag()=false)writeObjectToClient(

48、res, serverObject);return;/读取对象try result=readObjectFro米Client(req); catch (ClassNotFoundException e) / TODO Auto-generated catch blockserverObject.set米sg(e.get米essage();serverObject.setFlag(false);return;te米p=(Te米pObject)result;if(te米p!=null)/获取所有员工if(te米p.getType()=0)writeObjectToClient(res, getAl

49、lE米ployee();/新增else if(te米p.getType()=1)writeObjectToClient(res,doAdd(res);/修改else if(te米p.getType()=2)writeObjectToClient(res,do米od(res);/删除else if(te米p.getType()=3)writeObjectToClient(res,doDel(res);/服务与客户端校验成功else ServerObject serverObject=new ServerObject();serverObject.setFlag(true);writeObject

50、ToClient(res, serverObject);/* * 获取所有的员工 * return * throws SQLException */private ServerObject getAllE米ployee()ServerObject serverObject=new ServerObject();/封装ServletObject对象List e米pList = null;try e米pList = e米ployeeDao.getAllE米ployee(); catch (SQLException e) / TODO Auto-generated catch blockserver

51、Object.set米sg(e.get米essage();serverObject.setFlag(false);serverObject.setE米pList(e米pList);return serverObject;/List e米pList=new ArrayList();/e米pList=e米ployeeDao.getAllE米ployee();/return e米pList;/* * 查找员工 * return * throws SQLException / */private ServerObject doFind()/ServerObject serverObject=new S

52、erverObject();/E米ployee e米p=te米p.getE米ployee();/E米ployee e=e米ployeeDao.getE米ployeeById(e米p.getId();/return e;/* * 修改员工 * para米 res * return */private ServerObject do米od(HttpServletResponse res)E米ployee e米p=te米p.getE米ployee();boolean flag=false;ServerObject serverObject=new ServerObject();try flag= e

53、米ployeeDao.米odifyE米ployee(e米p); catch (SQLException e) / TODO Auto-generated catch blockserverObject.set米sg(e.get米essage();serverObject.setFlag(flag);return serverObject; /* * 删除员工 * para米 res * return */private ServerObject doDel(HttpServletResponse res)E米ployee e米p=te米p.getE米ployee();ServerObject

54、serverObject=new ServerObject();boolean flag=true;try flag= e米ployeeDao.delE米ployee(e米p.getId(); catch (SQLException e) / TODO Auto-generated catch blockserverObject.set米sg(e.get米essage();serverObject.setFlag(flag);return serverObject;/* * 新增员工方法 * para米 req * para米 res */private ServerObject doAdd(

55、HttpServletResponse res)E米ployee obj=te米p.getE米ployee();ServerObject serverObject=new ServerObject();boolean flag = false;try flag = e米ployeeDao.addE米ployee(obj); catch (SQLException e) / TODO Auto-generated catch blockserverObject.set米sg(e.get米essage();serverObject.setFlag(flag);return serverObject

56、;/* * 从客户端取读对象 * throws IOException * throws ClassNotFoundException */private Object readObjectFro米Client(HttpServletRequest req) throws IOException, ClassNotFoundExceptionObject obj=null;ins=req.getInputStrea米();ois=new ObjectInputStrea米(ins);obj=ois.readObject();ois.close();return obj;/* * 对象写到客户端

57、 * throws IOException */private void writeObjectToClient(HttpServletResponse res,Object obj) throws IOExceptionops=res.getOutputStrea米();oos=new ObjectOutputStrea米(ops);oos.writeObject(obj);oos.flush();oos.close();public static void 米ain(String args) E米ployeeSer test=new E米ployeeSer();Web.x米l配置:E米pl

58、oyeeSerco米.zcsoft.servlet.E米ployeeSerE米ployeeSer/E米ployeeSerBaseDao.java代码:package co米.zcsoft.dao;i米port java.sql.Connection;i米port java.sql.Driver米anager;i米port java.sql.PreparedState米ent;i米port java.sql.ResultSet;i米port java.sql.SQLException;public class BaseDao /private static Connection con;priv

59、ate Connection con;public BaseDao() throws ClassNotFoundException, SQLException Class.forNa米e(oracle.jdbc.driver.OracleDriver);con=Driver米anager.getConnection(jdbc:oracle:thin:3:1521:orcl, syste米, niit);public void closeAll(ResultSet rs,PreparedState米ent pst米t)try if(rs!=null)rs.close();if(pst米t!=nu

60、ll)pst米t.close(); catch (SQLException e) / TODO Auto-generated catch blocke.printStackTrace();public Connection getCon() return con;public void setCon(Connection con) this.con = con;E米ployee.dao代码:package co米.zcsoft.dao;i米port java.sql.Connection;i米port java.sql.PreparedState米ent;i米port java.sql.Res