appletservlet.java

J2EE编程实例

package servletapplet;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import javax.swing.border.*;
import com.borland.jbcl.layout.*;
import java.net.*;
import java.io.*;
import java.util.*;

public class AppletServlet extends Applet
{
  boolean isStandalone = false;
  BorderLayout borderLayout1 = new BorderLayout();  //建立布局管理器对象
  XYLayout xYLayout1 = new XYLayout();
  XYLayout xYLayout4 = new XYLayout();
  XYLayout xYLayout3 = new XYLayout();
  XYLayout xYLayout2 = new XYLayout();
  ButtonGroup buttonGroup1 = new ButtonGroup();
  JPanel jMainPanel = new JPanel();
  JLabel jLabelTitle = new JLabel();
  Border border1;
  Border border2;
  Border border3;
  Border border4;
  Border border5;
  Border border6;
  Border border7;
  JLabel jLabel_Result3 = new JLabel();
  JLabel jLabel_Result2 = new JLabel();
  JLabel jLabel_Result1 = new JLabel();
  JPanel jFlowerMeansPanel = new JPanel();
  JRadioButton jRadButtonBirthday = new JRadioButton();
  JPanel jPanelValue = new JPanel();
  JRadioButton jRadButtonLiYi = new JRadioButton();
  Choice ChoiceLiYi = new Choice();
  JRadioButton jRadButtonConstellation = new JRadioButton();
  Choice ChoiceConstellation = new Choice();
  JButton jButtonSearch = new JButton();
  JLabel jLabel3 = new JLabel();
  JLabel jLabel2 = new JLabel();
  Choice ChoiceBirthday = new Choice();
  JLabel jLabel1 = new JLabel();
  JPanel jFlowerMeansChoosePanel = new JPanel();
  URLConnection urlconn = null;   //定义Servlet连接对象
  URL curl = null;    //定义统一资源定位器（URL）对象

  public String getParameter(String key, String def)
  {
   /* 获得一个参数的值 */
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  public AppletServlet()
  {
   /* 这是一个构造器，由于构造一个AppletServlet对象 */
  }

  public void init()
  {
    /* 初始化Applet */
    try
    {
      jbInit();
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }
  }

  private void jbInit() throws Exception
  {
   /* 初始化Applet的组件 */
    border1 = BorderFactory.createMatteBorder(1,1,1,1,new Color(255, 105, 223));
    border2 = BorderFactory.createMatteBorder(1,1,1,1,new Color(255, 112, 0));
    border3 = BorderFactory.createMatteBorder(1,1,1,1,new Color(59, 230, 118));
    border4 = BorderFactory.createMatteBorder(1,1,1,1,Color.blue);
    border5 = new TitledBorder(BorderFactory.createMatteBorder(1,1,1,1,Color.blue),"选择查询对象");
    border6 = new TitledBorder(BorderFactory.createMatteBorder(1,1,1,1,Color.blue),"查询结果");
    border7 = BorderFactory.createMatteBorder(0,0,1,0,Color.orange);
    this.setLayout(borderLayout1);
    jMainPanel.setBackground(SystemColor.textHighlightText);
    jMainPanel.setBorder(border1);
    jMainPanel.setLayout(xYLayout1);
    jLabelTitle.setFont(new java.awt.Font("Dialog", 3, 22));
    jLabelTitle.setForeground(new Color(0, 190, 112));
    jLabelTitle.setText("网 上 花 店 信 息 系 统");
    jRadButtonConstellation.addMouseListener(new AppletServlet_jRadButtonConstellation_mouseAdapter(this));
    jRadButtonLiYi.addMouseListener(new AppletServlet_jRadButtonLiYi_mouseAdapter(this));
    jRadButtonBirthday.addMouseListener(new AppletServlet_jRadButtonBirthday_mouseAdapter(this));
    ChoiceLiYi.setEnabled(false);
    ChoiceBirthday.setEnabled(false);
    buttonGroup1.add(jRadButtonConstellation);
    buttonGroup1.add(jRadButtonLiYi);
    buttonGroup1.add(jRadButtonBirthday);
    this.addItemIntoChoice();
    jLabel_Result3.setBorder(border7);
    jLabel_Result3.setText(" ");
    jLabel_Result2.setText(" ");
    jLabel_Result2.setBorder(border7);
    jLabel_Result1.setBorder(border7);
    jLabel_Result1.setText(" ");
    jFlowerMeansPanel.setBackground(SystemColor.info);
    jFlowerMeansPanel.setBorder(border2);
    jFlowerMeansPanel.setLayout(xYLayout2);
    jRadButtonBirthday.setBackground(SystemColor.info);
    jRadButtonBirthday.setText("诞辰与花卉");
    jPanelValue.setBackground(SystemColor.info);
    jPanelValue.setBorder(border6);
    jPanelValue.setLayout(xYLayout4);
    jRadButtonLiYi.setText("礼仪与花卉");
    jRadButtonLiYi.setBackground(SystemColor.info);
    jRadButtonConstellation.setBackground(SystemColor.info);
    jRadButtonConstellation.setSelected(true);
    jRadButtonConstellation.setText("星座与花卉");
    jButtonSearch.setText("查    询");
    jButtonSearch.addActionListener(new AppletServlet_jButtonSearch_actionAdapter(this));
    jLabel3.setText("寓    意：");
    jLabel2.setText("花    名：");
    jLabel1.setText("星    座：");
    jFlowerMeansChoosePanel.setBackground(SystemColor.info);
    jFlowerMeansChoosePanel.setBorder(border5);
    jFlowerMeansChoosePanel.setLayout(xYLayout3);
    this.add(jMainPanel, BorderLayout.CENTER);
    jMainPanel.add(jLabelTitle,      new XYConstraints(131, 8, -1, -1));
    jMainPanel.add(jFlowerMeansPanel,       new XYConstraints(8, 70, 465, 285));
    jPanelValue.add(jLabel1, new XYConstraints(25, 6, 54, -1));
    jPanelValue.add(jLabel_Result1, new XYConstraints(81, 6, 96, -1));
    jPanelValue.add(jLabel_Result2, new XYConstraints(263, 5, 162, -1));
    jPanelValue.add(jLabel2, new XYConstraints(207, 5, 54, -1));
    jPanelValue.add(jLabel_Result3, new XYConstraints(82, 47, 342, -1));
    jPanelValue.add(jLabel3, new XYConstraints(26, 47, 54, -1));
    jFlowerMeansPanel.add(jFlowerMeansChoosePanel, new XYConstraints(7, 12, 449, 146));
    jFlowerMeansPanel.add(jPanelValue, new XYConstraints(6, 161, 449, 116));
    jFlowerMeansChoosePanel.add(jRadButtonConstellation, new XYConstraints(27, 9, -1, -1));
    jFlowerMeansChoosePanel.add(ChoiceConstellation, new XYConstraints(127, 11, 76, -1));
    jFlowerMeansChoosePanel.add(ChoiceLiYi, new XYConstraints(338, 10, 75, -1));
    jFlowerMeansChoosePanel.add(jRadButtonLiYi, new XYConstraints(238, 8, -1, -1));
    jFlowerMeansChoosePanel.add(jButtonSearch, new XYConstraints(338, 86, 73, 24));
    jFlowerMeansChoosePanel.add(ChoiceBirthday, new XYConstraints(128, 43, 74, -1));
    jFlowerMeansChoosePanel.add(jRadButtonBirthday, new XYConstraints(28, 41, -1, -1));
  }

  public String getAppletInfo()
  {
    /* 获得这个Applet的信息 */
    return "Applet Information";
  }

  public String[][] getParameterInfo()
  {
    /* 获得这个Applet的参数信息 */
    return null;
  }

  public void addItemIntoChoice()
  {
   /* 给ChoiceConstellation加入初始值 */
   String[] Constellation = {"牡羊座","金牛座","双子座","巨蟹座","狮子座","处女座","天秤座","天蝎座","射手座","魔羯座","水瓶座","双鱼座"};
   String[] LiYi = {"结 婚","生 产","乔 迁","生 日","探 病","丧 事"};
   String[] BirthdayMonth = {"一  月","二  月","三  月","四  月","五  月","六  月","七  月","八  月","九  月","十  月","十一月","十二月"};
   int i = 0;

   for(i = 0;i < 12; i++)
    {
     ChoiceConstellation.add(Constellation[i]);
    }

   for(i = 0;i < 6; i++)
    {
     ChoiceLiYi.add(LiYi[i]);
    }

   for(i = 0;i < 12; i++)
    {
     ChoiceBirthday.add(BirthdayMonth[i]);
    }
  }
  void jButtonSearch_actionPerformed(ActionEvent e)
  {
   /* 当按钮被按下时，处理Applet与Servlet之间的通信关系 */
   String ssqlcmd = null;
   int v = 0;
   String queryString = null;
   String responseString = null;
   String responseString_chs = null;
   DataInputStream in = null;
   StringTokenizer st = null;

   if (jRadButtonConstellation.isSelected() == true)
     {
      v = ChoiceConstellation.getSelectedIndex() + 1;
      ssqlcmd = "Select Constellation,FlowerName,Means from Constellation where ID=" + v;
     }

   if (jRadButtonLiYi.isSelected() == true)
     {
      v = ChoiceLiYi.getSelectedIndex() + 1;
      ssqlcmd = "Select LiYi,FlowerName,Means from LiYi where ID=" + v;
     }

   if (jRadButtonBirthday.isSelected() == true)
     {
      v = ChoiceBirthday.getSelectedIndex() + 1;
      ssqlcmd = "Select BirthdayMonth,FlowerName,Means from BirthdayMonth where ID=" + v;
     }

   if(ssqlcmd != null)
     {
      /* 格式化URL连接串，并且将其转换为www-form-urlencode的格式 */
      try
        {
         queryString = "http://127.0.0.1/examples/servlet/ServletConnect?ssqlcmd=";
         queryString = queryString + URLEncoder.encode(ssqlcmd); //规格化URL串
         /* 与Servlet进行通信 */
         urlconn = (new URL(curl,queryString)).openConnection();  //打开连接
         /* 设置连接时Cache的使用情况 */
         urlconn.setDefaultUseCaches(false);
         urlconn.setUseCaches(false);
         /* 设置输入/输出流的使用情况 */
         urlconn.setDoInput(true);
         urlconn.setDoOutput(false);
         urlconn.connect(); //进行连接
         in = new DataInputStream(urlconn.getInputStream());
         responseString = in.readLine().toString();  //获取Servlet反馈的信息
         responseString_chs = new String(responseString.getBytes("iso-8859-1"));
         st = new StringTokenizer(responseString_chs,",");
         jLabel_Result1.setText(st.nextToken());
         jLabel_Result2.setText(st.nextToken());
         jLabel_Result3.setText(st.nextToken());
        }
      catch(Exception err1)
        {
         JOptionPane.showMessageDialog(null,"在与Servlet通信过程中出现了下列错误：\n"+err1.toString(),"警  告！",2);
        }
     }
  }

  void jRadButtonConstellation_mouseClicked(MouseEvent e)
  {
   /* 当鼠标选中这个单选框时，激活相应的下拉式列表框 */
   ChoiceConstellation.setEnabled(true);
   ChoiceLiYi.setEnabled(false);
   ChoiceBirthday.setEnabled(false);
   jLabel1.setText("星    座：");
  }

  void jRadButtonLiYi_mouseClicked(MouseEvent e)
  {
   ChoiceConstellation.setEnabled(false);
   ChoiceLiYi.setEnabled(true);
   ChoiceBirthday.setEnabled(false);
   jLabel1.setText("礼    仪：");
  }

  void jRadButtonBirthday_mouseClicked(MouseEvent e)
  {
   ChoiceConstellation.setEnabled(false);
   ChoiceLiYi.setEnabled(false);
   ChoiceBirthday.setEnabled(true);
   jLabel1.setText("生    日：");
  }
}

class AppletServlet_jButtonSearch_actionAdapter implements java.awt.event.ActionListener
{
  /* 建立事件监听器 */
  AppletServlet adaptee;

  AppletServlet_jButtonSearch_actionAdapter(AppletServlet adaptee)
  {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e)
  {
    adaptee.jButtonSearch_actionPerformed(e);
  }
}

class AppletServlet_jRadButtonConstellation_mouseAdapter extends java.awt.event.MouseAdapter
{
  AppletServlet adaptee;

  AppletServlet_jRadButtonConstellation_mouseAdapter(AppletServlet adaptee)
  {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e)
  {
    adaptee.jRadButtonConstellation_mouseClicked(e);
  }
}

class AppletServlet_jRadButtonLiYi_mouseAdapter extends java.awt.event.MouseAdapter
{
  AppletServlet adaptee;

  AppletServlet_jRadButtonLiYi_mouseAdapter(AppletServlet adaptee)
  {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e)
  {
    adaptee.jRadButtonLiYi_mouseClicked(e);
  }
}

class AppletServlet_jRadButtonBirthday_mouseAdapter extends java.awt.event.MouseAdapter
{
  AppletServlet adaptee;

  AppletServlet_jRadButtonBirthday_mouseAdapter(AppletServlet adaptee)
  {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e)
  {
    adaptee.jRadButtonBirthday_mouseClicked(e);
  }
}