基于BS结构的applet和servlet通信实例

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TempObject(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ManageInfo,java:代码如下：package com.zcsof

2、t.frame;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.io.IOException;import java.io.InputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.i

3、o.OutputStream;import .MalformedURLException;import .URL;import .URLConnection;import java.util.Calendar;import java.util.List;import java.util.Vector;import javax.print.attribute.standard.Severity;import javax.swing.JApplet;import javax.swing.JButton;import javax.swing.JComb

4、oBox;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTable;import javax.swing.JTextField;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;import javax.swing.

5、border.LineBorder;import javax.swing.event.ListSelectionEvent;import javax.swing.event.ListSelectionListener;import javax.swing.table.DefaultTableModel;import javax.swing.table.TableColumn;import javax.swing.table.TableColumnModel;import ernal.UDPClient;import com.sun.corba.se.i

6、mpl.ior.WireObjectKeyTemplate;import com.zcsoft.dao.EmployeeDao;import com.zcsoft.test.Employee;import com.zcsoft.test.ServerObject;import com.zcsoft.test.TempObject;/* * 页面窗体 * author training * */public class ManageInfo extends JApplet private JTable tab;private DefaultTableModel tabModel;/文本框priv

7、ate JTextField txtName,txtBirth,txtPhone,txtEmail,txtAddress;/下拉列表private JComboBox cboSex,cboEducation;/按钮private JButton btnUpd,btnAdd,btnMod,btnDel;private URL url;private URLConnection urlcon;private InputStream ins=null;private ObjectInputStream ois=null;private ObjectOutputStream oos=null;priv

8、ate Object result=null;private Calendar calendar;public ManageInfo() setBounds(200, 200, 900, 700);setLayout(new BorderLayout();/组件初始化componentInit();/校验服务端if(checkServer()/数据初始化InitData();/绑定监听器bindListener();/cboEducation.addActionListener()/*tabModel.addRow(rowData);tabModel.setValueAt(aValue, ro

9、w, column);tabModel.removeRow();*/tab.getSelectionModel().addListSelectionListener(new ListSelectionListener()/Override/public void valueChanged(ListSelectionEvent e) /);/* * 组件初始化 */private void componentInit()/用于BorderLayout布局的上中下面板JPanel pnlTop,pnlFoot;JScrollPane spnlTab;/实例化文本框txtName=new JText

10、Field(10);txtBirth=new JTextField(10);txtPhone=new JTextField(10);txtEmail=new JTextField(10);txtAddress=new JTextField(40);/实例化下拉列表cboEducation=new JComboBox(new String博士,硕士,本科,专科,高中);cboSex=new JComboBox(new String男,女);/实例化按钮btnUpd=new JButton(刷新);btnAdd=new JButton(添加);btnDel=new JButton(删除);btnM

11、od=new JButton(修改);/主体部分pnlTop=new JPanel(new GridBagLayout();pnlTop.setBorder(new LineBorder(Color.red,1);/底部pnlFoot=new JPanel();pnlFoot.add(btnUpd);pnlFoot.add(btnAdd);pnlFoot.add(btnMod);pnlFoot.add(btnDel);/实例化表格String columns=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;tabMode

12、l=new DefaultTableModel(data,columns);tab=new JTable(tabModel);/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

13、.NORTHWEST;pnlTop.add(new JLabel(姓名),gbc);pnlTop.add(txtName,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(txtP

14、hone,gbc);pnlTop.add(new JLabel(电子邮件),gbc);pnlTop.add(txtEmail,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);thi

15、s.add(pnlFoot,BorderLayout.SOUTH);/* * 绑定监听器 */private void bindListener()btnUpd.addActionListener(new btnClick();btnAdd.addActionListener(new btnClick();btnDel.addActionListener(new btnClick();btnMod.addActionListener(new btnClick();tab.getSelectionModel().addListSelectionListener(new tabSelectedCh

16、ange();/* * 表格变更行监听实现类 * author training * */private class tabSelectedChange implements 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InitFrame();int sel=tab.getSelectedRow();if(tab.getValueAt(s

17、el, 1)!=null)txtName.setText(tab.getValueAt(sel, 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)txtEmail.setText(tab.getValueAt(sel, 6)

18、.toString();if(tab.getValueAt(sel, 7)!=null)txtAddress.setText(tab.getValueAt(sel, 7).toString();if(tab.getValueAt(sel, 4).toString().trim().equals(博士)cboEducation.setSelectedIndex(0);else if(tab.getValueAt(sel, 4).toString().trim().equals(硕士)cboEducation.setSelectedIndex(1);else if(tab.getValueAt(s

19、el, 4).toString().trim().equals(本科)cboEducation.setSelectedIndex(2);else if(tab.getValueAt(sel, 4).toString().trim().equals(专科)cboEducation.setSelectedIndex(3);elsecboEducation.setSelectedIndex(4);if(tab.getValueAt(sel, 3).toString().trim().equals(男)cboSex.setSelectedIndex(0);elsecboSex.setSelectedI

20、ndex(1);/* * 按钮监听器实现类 * author training * */private class btnClick implements ActionListenerOverridepublic void actionPerformed(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

21、(btn=btnDel)del();/修改elsemod();/更新表格/InitData();/* * 刷新表格 */private void update()InitData();InitFrame();/* * 新增方法 */private void add()/封装对象String name,birth,sex,education,phone,email,address;int id=getNum();name=txtName.getText();birth=txtBirth.getText();education=cboEducation.getSelectedItem().toSt

22、ring();phone=txtPhone.getText();email=txtEmail.getText();address=txtAddress.getText();TempObject temp=new TempObject();Employee emp=new Employee();emp.setId(id);emp.setName(name);emp.setAddress(address);emp.setBirth(birth);emp.setPhone(phone);emp.setEmail(email);emp.setEducation(education);if(cboSex

23、.getSelectedIndex()=0)sex=男;emp.setSex(1);elsesex=女;emp.setSex(0);temp.setEmployee(emp);temp.setType(1);/将对象写到服务端writeObjectToServer(temp);/获取服务端返回结果result=readObjectFromServer();if(result!=null)ServerObject returnObject=(ServerObject)result;if(returnObject.getFlag()tabModel.addRow(new Objectid,name

24、,birth,sex,education,phone,email,address);JOptionPane.showMessageDialog(null,新增成功);elseJOptionPane.showMessageDialog(null, returnObject.getMsg();return;/* * 修改方法 */private void mod()if(tab.getSelectedRow()=-1)JOptionPane.showMessageDialog(null,请选择要操作的行);return;/实例化TempObjectTempObject tempObject=new

25、 TempObject();Employee emp=new Employee();emp.setId(Integer.parseInt(tab.getValueAt(tab.getSelectedRow(), 0).toString();emp.setName(txtName.getText();emp.setBirth(txtBirth.getText();emp.setPhone(txtPhone.getText();emp.setEmail(txtEmail.getText();emp.setAddress(txtAddress.getText();/选择男if(cboSex.getS

26、electedIndex()=0)emp.setSex(1);elseemp.setSex(0);if(cboEducation.getSelectedIndex()=0)emp.setEducation(博士);else if(cboEducation.getSelectedIndex()=1)emp.setEducation(硕士);else if(cboEducation.getSelectedIndex()=2)emp.setEducation(本科);else if(cboEducation.getSelectedIndex()=3)emp.setEducation(专科);else

27、 if(cboEducation.getSelectedIndex()=4)emp.setEducation(高中);tempObject.setType(2);tempObject.setEmployee(emp);/发送请求writeObjectToServer(tempObject);Object dataMod=new Objectemp.getName(),emp.getBirth(),cboSex.getSelectedItem().toString(),emp.getEducation(),emp.getPhone(),emp.getEmail(),emp.getAddress(

28、);/获取响应result=readObjectFromServer();if(result!=null)ServerObject serverObject=(ServerObject)result;if(serverObject.getFlag()for(int i=1;i8;i+)tabModel.setValueAt(dataModi-1,tab.getSelectedRow(), i);JOptionPane.showMessageDialog(null,修改成功);elseJOptionPane.showMessageDialog(null,serverObject.getMsg()

29、;return;/* * 删除方法 */private void del()if(tab.getSelectedRow()=-1)JOptionPane.showMessageDialog(null,请选择要操作的行);return;int sel=JOptionPane.showConfirmDialog(null, 确认删除);if(sel=JOptionPane.OK_OPTION)TempObject tempObject=new TempObject();/3 表示删除tempObject.setType(3);int id=Integer.parseInt(tab.getValue

30、At(tab.getSelectedRow(), 0).toString();Employee emp=new Employee();emp.setId(id);tempObject.setEmployee(emp);/写到服务端writeObjectToServer(tempObject);/从服务端获得结果result=readObjectFromServer();ServerObject serverObject=(ServerObject)result;if(serverObject.getFlag()tabModel.removeRow(tab.getSelectedRow();JO

31、ptionPane.showMessageDialog(null,删除成功);InitFrame();elseJOptionPane.showMessageDialog(null, serverObject.getMsg();else/* * 根据指定数据更新表数据 * param list */private void InitData()urlcon=getCon();/获取所有数据TempObject tempObject=new TempObject();tempObject.setType(0);writeObjectToServer(tempObject);/获取服务返回数据Obj

32、ect obj=readObjectFromServer();ServerObject returnObj=(ServerObject)obj;/方法正确执行if(returnObj.getFlag()List list=returnObj.getEmpList();String columns=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

33、).getName();datai2=list.get(i).getBirth();if(list.get(i).getSex()=1)datai3=男;elsedatai3=女;datai4=list.get(i).getEducation();datai5=list.get(i).getPhone();datai6=list.get(i).getEmail();datai7=list.get(i).getAddress();tabModel.setDataVector(data, columns);/隐藏第一列TableColumnModel colModel=tab.getColumnM

34、odel();TableColumn column=colModel.getColumn(0);column.setMaxWidth(0);column.setMinWidth(0);column.setPreferredWidth(0);elseJOptionPane.showMessageDialog(null,returnObj.getMsg();/* * 获取链接 * param url * return */private URLConnection getCon()URLConnection con=null;try url=new URL(http:/localhost:8080

35、/Web2/EmployeeSer);con=url.openConnection();con.setDoInput(true);con.setDoOutput(true);con.setUseCaches(false);con.connect(); catch (MalformedURLException e) / TODO Auto-generated catch blockJOptionPane.showMessageDialog(null, e.getMessage(); catch (IOException e) / TODO Auto-generated catch blockJO

36、ptionPane.showMessageDialog(null, e.getMessage();return con;/* * 清空组件框 */private void InitFrame()txtAddress.setText();txtBirth.setText();txtEmail.setText();txtPhone.setText();txtName.setText();cboEducation.setSelectedIndex(0);cboSex.setSelectedIndex(0);/* * 将对象写入服务端 * param obj */private void writeO

37、bjectToServer(Object obj)try oos=new ObjectOutputStream(urlcon.getOutputStream();oos.writeObject(obj);oos.flush();oos.close(); catch (IOException e) / TODO Auto-generated catch blockJOptionPane.showMessageDialog(null, e.getMessage();/* * 从服务端读取对象 * return */private Object readObjectFromServer()Objec

38、t objRerurn=null;try ins=urlcon.getInputStream();ois=new ObjectInputStream(ins);objRerurn=ois.readObject();ois.close(); catch (IOException e) / TODO Auto-generated catch blockJOptionPane.showMessageDialog(null, e.getMessage(); catch (ClassNotFoundException e) / TODO Auto-generated catch blockJOption

39、Pane.showMessageDialog(null, e.getMessage();return objRerurn;/* * 校验服务端是否发生异常 */private boolean checkServer()urlcon=getCon();writeObjectToServer(new TempObject();ServerObject returnObject=(ServerObject) readObjectFromServer();if(returnObject!=null)if(returnObject.getFlag()=false)JOptionPane.showMess

40、ageDialog(null, returnObject.getMsg();elsereturn returnObject.getFlag();elsereturn false;/* * 获取一个编号 * return */private int getNum()String s=Calendar.getInstance().hashCode()+;String b=s.substring(5);return Integer.parseInt(b);public static void main(String args) /try /UIManager.setLookAndFeel(UIMan

41、ager.getSystemLookAndFeelClassName();/ catch (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.printStackTrac

42、e();/ catch (UnsupportedLookAndFeelException e) / TODO Auto-generated catch block/e.printStackTrace();/JFrame frame=new JFrame();frame.setLayout(new BorderLayout();ManageInfo manageInfo=new ManageInfo();frame.add(manageInfo,BorderLayout.CENTER);frame.setBounds(200, 200,800,500);frame.setVisible(true

43、);Server端的EmployeeSer代码如下：package com.zcsoft.servlet;import java.io.IOException;import java.io.InputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.OutputStream;import java.sql.SQLException;import java.util.ArrayList;import java.util.List;import javax.print.a

44、ttribute.standard.Severity;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.sun.corba.se.impl.ior.WireObjectKeyTemplate;import com.zcsoft.dao.EmployeeDao;import com.zcsoft

45、.test.Employee;import com.zcsoft.test.ServerObject;import com.zcsoft.test.TempObject;public class EmployeeSer extends HttpServlet private EmployeeDao employeeDao=null;private InputStream ins=null;private OutputStream ops=null;private ObjectInputStream ois=null;private ObjectOutputStream oos=null;pri

46、vate Object result=null;private TempObject temp=null;private ServerObject serverObject=null;public EmployeeSer() / TODO Auto-generated constructor stubserverObject=new ServerObject();try employeeDao=new EmployeeDao(); catch (ClassNotFoundException e) / TODO Auto-generated catch blockserverObject.set

47、Msg(e.getMessage();serverObject.setFlag(false); catch (SQLException e) / TODO Auto-generated catch blockserverObject.setMsg(e.getMessage();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(res, serverObject);return;/读取对象try result=readObjectFromClient(req); catch