BlogJava-杨彩的Java博客-随笔分类-我的Java程序

文件的所有操作

杨彩 — Sun, 28 Jan 2007 14:22:00 GMT

/**
* //FileOperate.java
* 文件的各种操作
* 杨彩 http://blog.sina.com.cn/m/yangcai
* 文件操作 1.0
*/

//package common;

import java.io.*;

public class FileOperate
{
static boolean exitnow=false;
static String aa,bb;
public FileOperate() {
}

/**
   * 新建目录
   */
public void newFolder(String folderPath) {
    try
    {
      String filePath = folderPath;
      filePath = filePath.toString();
      File myFilePath = new File(filePath);
      if(!myFilePath.exists())
      {
        myFilePath.mkdir();
      }
      System.out.println("新建目录操作成功执行");
    }
    catch(Exception e)
    {
      System.out.println("新建目录操作出错");
      e.printStackTrace();
    }
}

/**
   * 新建文件
   */
public void newFile(String filePathAndName, String fileContent)
{

    try
    {
      String filePath = filePathAndName;
      filePath = filePath.toString();
      File myFilePath = new File(filePath);
      if (!myFilePath.exists())
      {
        myFilePath.createNewFile();
      }
      FileWriter resultFile = new FileWriter(myFilePath);
      PrintWriter myFile = new PrintWriter(resultFile);
      String strContent = fileContent;
      myFile.println(strContent);
      resultFile.close();
      System.out.println("新建文件操作成功执行");
    }
    catch (Exception e) {
      System.out.println("新建目录操作出错");
      e.printStackTrace();

    }

}

/**
   * 删除文件
   */
public void delFile(String filePathAndName) {
    try {
      String filePath = filePathAndName;
      filePath = filePath.toString();
      File myDelFile = new File(filePath);
      myDelFile.delete();
      System.out.println("删除文件操作成功执行");
    }
    catch (Exception e) {
      System.out.println("删除文件操作出错");
      e.printStackTrace();

    }

}

/**
   * 删除文件夹
   */
public void delFolder(String folderPath)
{
    try
    {
      delAllFile(folderPath); //删除完里面所有内容
      String filePath = folderPath;
      filePath = filePath.toString();
      File myFilePath = new File(filePath);
      myFilePath.delete(); //删除空文件夹
      System.out.println("删除文件夹操作成功执行");
    }
    catch (Exception e)
    {
      System.out.println("删除文件夹操作出错");
      e.printStackTrace();

    }

}

/**
   * 删除文件夹里面的所有文件
   * @param path String 文件夹路径如 c:/fqf
   */
public void delAllFile(String path)
{
    File file = new File(path);
    if(!file.exists())
    {
      return;
    }
    if(!file.isDirectory())
    {
      return;
    }
    String[] tempList = file.list();
    File temp = null;
    for (int i = 0; i < tempList.length; i++)
    {
      if(path.endsWith(File.separator))
      {
        temp = new File(path + tempList[i]);
      }
      else
      {
        temp = new File(path + File.separator + tempList[i]);
      }
      if (temp.isFile())
      {
        temp.delete();
      }
      if (temp.isDirectory())
      {
        delAllFile(path+"/"+ tempList[i]);//先删除文件夹里面的文件
        delFolder(path+"/"+ tempList[i]);//再删除空文件夹
      }
    }
          System.out.println("删除文件操作成功执行");
}

/**
   * 复制单个文件
   * @param oldPath String 原文件路径如：c:/fqf.txt
   * @param newPath String 复制后路径如：f:/fqf.txt
   */
public void copyFile(String oldPath, String newPath) {
    try {
      int bytesum = 0;
      int byteread = 0;
      File oldfile = new File(oldPath);
      if (oldfile.exists())
      { //文件存在时
        InputStream inStream = new FileInputStream(oldPath); //读入原文件
        FileOutputStream fs = new FileOutputStream(newPath);
        byte[] buffer = new byte[1444];
        int length;
        while ( (byteread = inStream.read(buffer)) != -1) {
          bytesum += byteread; //字节数文件大小
          System.out.println(bytesum);
          fs.write(buffer, 0, byteread);
        }
        inStream.close();
      }
            System.out.println("删除文件夹操作成功执行");
    }
    catch (Exception e) {
      System.out.println("复制单个文件操作出错");
      e.printStackTrace();

    }

}

/**
   * 复制整个文件夹内容
   * @param oldPath String 原文件路径如：c:/fqf
   * @param newPath String 复制后路径如：f:/fqf/ff
   */
public void copyFolder(String oldPath, String newPath) {

    try
    {
      (new File(newPath)).mkdirs(); //如果文件夹不存在则建立新文件夹
      File a=new File(oldPath);
      String[] file=a.list();
      File temp=null;
      for (int i = 0; i < file.length; i++)
      {
        if(oldPath.endsWith(File.separator))
        {
          temp=new File(oldPath+file[i]);
        }
        else{
          temp=new File(oldPath+File.separator+file[i]);
        }

        if(temp.isFile())
        {
          FileInputStream input = new FileInputStream(temp);
          FileOutputStream output = new FileOutputStream(newPath + "/" +
              (temp.getName()).toString());
          byte[] b = new byte[1024 * 5];
          int len;
          while ( (len = input.read(b)) != -1)
          {
            output.write(b, 0, len);
          }
          output.flush();
          output.close();
          input.close();
        }
        if(temp.isDirectory())
        {//如果是子文件夹
          copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);
        }
      }
            System.out.println("复制文件夹操作成功执行");
    }
    catch (Exception e) {
      System.out.println("复制整个文件夹内容操作出错");
      e.printStackTrace();

    }

}

/**
   * 移动文件到指定目录
   * @param oldPath String 如：c:/fqf.txt
   * @param newPath String 如：d:/fqf.txt
   */
public void moveFile(String oldPath, String newPath) {
    copyFile(oldPath, newPath);
    delFile(oldPath);

}

/**
   * 移动文件到指定目录
   * @param oldPath String 如：c:/fqf.txt
   * @param newPath String 如：d:/fqf.txt
   */
public void moveFolder(String oldPath, String newPath) {
    copyFolder(oldPath, newPath);
    delFolder(oldPath);

}

public static void main(String args[])
{
System.out.println("使用此功能请按[1] 功能一：新建目录");
System.out.println("使用此功能请按[2] 功能二：新建文件");
System.out.println("使用此功能请按[3] 功能三：删除文件");
System.out.println("使用此功能请按[4] 功能四：删除文件夹");
System.out.println("使用此功能请按[5] 功能五：删除文件夹里面的所有文件");
System.out.println("使用此功能请按[6] 功能六：复制文件");
System.out.println("使用此功能请按[7] 功能七：复制文件夹的所有内容");
System.out.println("使用此功能请按[8] 功能八：移动文件到指定目录");
System.out.println("使用此功能请按[9] 功能九：移动文件夹到指定目录");
System.out.println("使用此功能请按[10] 退出程序");

while(!exitnow)
{
  FileOperate fo=new FileOperate();
  try
  {
  BufferedReader Bin=new BufferedReader(new InputStreamReader(System.in));
  String a=Bin.readLine();
  int b=Integer.parseInt(a);

  switch(b)
  {
   case 1:System.out.println("你选择了功能一请输入目录名");
      aa=Bin.readLine();
      fo.newFolder(aa);
      break;
   case 2:System.out.println("你选择了功能二请输入文件名");
      aa=Bin.readLine();
      System.out.println("请输入在"+aa+"中的内容");
      bb=Bin.readLine();
      fo.newFile(aa,bb);
      break;
   case 3:System.out.println("你选择了功能三请输入文件名");
      aa=Bin.readLine();
      fo.delFile(aa);
      break;
   case 4:System.out.println("你选择了功能四请输入文件名");
      aa=Bin.readLine();
      fo.delFolder(aa);
      break;
   case 5:System.out.println("你选择了功能五请输入文件名");
      aa=Bin.readLine();
      fo.delAllFile(aa);
      break;
   case 6:System.out.println("你选择了功能六请输入文件名");
      aa=Bin.readLine();
      System.out.println("请输入目标文件名");
      bb=Bin.readLine();
      fo.copyFile(aa,bb);
      break;
   case 7:System.out.println("你选择了功能七请输入源文件名");
      aa=Bin.readLine();
      System.out.println("请输入目标文件名");
      bb=Bin.readLine();
      fo.copyFolder(aa,bb);
      break;
   case 8:System.out.println("你选择了功能八请输入源文件名");
      aa=Bin.readLine();
      System.out.println("请输入目标文件名");
      bb=Bin.readLine();
      fo.moveFile(aa,bb);
      break;
    case 9:System.out.println("你选择了功能九请输入源文件名");
      aa=Bin.readLine();
      System.out.println("请输入目标文件名");
      bb=Bin.readLine();
      fo.moveFolder(aa,bb);
      break;
   case 10:exitnow=true;
       System.out.println("程序结束，请退出");
      break;
   default:System.out.println("输入错误.请输入1-10之间的数");
   }


  System.out.println("请重新选择功能");


  }
  catch(Exception e)
  {
  System.out.println("输入错误字符或程序出错");
  }

}
}
}

http://www.blogjava.net/Files/yangcai/FileOperate_java.rar

杨彩 2007-01-28 22:22 发表评论

[Java期末测试] 动态显示系统时间

杨彩 — Tue, 16 Jan 2007 07:43:00 GMT

//show.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.text.*;
import java.util.*;
public class show extends JFrame implements Runnable
{
static JFrame jf;
JLabel jl;
public show()
{
  jf=new JFrame("时间显示");
  jl=new JLabel();
  jf.getContentPane().add(jl);
  jf.setSize(200,100);
}

public void run()
{
  while(true)
  {
   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
   jl.setText(sdf.format(new Date()));
   try
   {
    Thread.sleep(1000);
   }
   catch(Exception e)
   {
    jl.setText("出错错误，请重启程序");
   }
  }
}
public static void main(String arg[])
{
  show t=new show();
  Thread thread1=new Thread(t);
  thread1.start();
  jf.setVisible(true);
}
}

杨彩 2007-01-16 15:43 发表评论

孝感学院JAVA成绩管理系统

杨彩 — Sat, 13 Jan 2007 04:25:00 GMT

/*
* MyAccess.java
* 杨彩 http://blog.sina.com.cn/m/yangcai
* 最后修改于2007.1.15
*
*/

import java.util.*;
import java.sql.*;
import java.io.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

public class MyAccess extends JFrame implements ActionListener,ListSelectionListener
{
private static Connection conn;
private static Statement comm;
private static ResultSet rs;
private static int total=0,k=10,row=0,i=0;
JLabel jl,jl2;
JTable jt;
JTextField jid,jname,jscore,se;
static JButton go,add,drop,del,jbse,flush;
JFrame jf;
JScrollPane s;
Vector vect=new Vector();
String[] data = {"学号=","学号>","学号<", "姓名=", "分数=","分数>=","分数<"};
  JComboBox dataList = new JComboBox(data);
String[] columnNames = {"学号","姓名","分数"};
AbstractTableModel tm = new AbstractTableModel()
{
          public int getColumnCount(){ return 3;}
          public int getRowCount(){ return k;}
          public Object getValueAt(int row, int col){ return ((Vector)vect.get(row)).get(col); }
          public String getColumnName(int column){    return columnNames[column];   }
      };

public MyAccess()
{
  jf=new JFrame("考感学院04级JAVA成绩管理系统");
  jf.setSize(490,570);
  jf.locate(200,200);
  jf.setResizable(false);
  jf.getContentPane().setLayout(new FlowLayout());
  jl=new JLabel("考感学院04级JAVA成绩");
  jid=new JTextField(6);
  jname=new JTextField(5);
  jscore=new JTextField(3);
  se=new JTextField(9);
  go=new JButton("分数(低->高)");
  go.addActionListener(this);
  add=new JButton("添加");
  add.addActionListener(this);
  drop=new JButton("修改");
  drop.addActionListener(this);
  del=new JButton("删除");
  del.addActionListener(this);
  jbse=new JButton("搜索");
  jbse.addActionListener(this);
  flush=new JButton("刷新");
  flush.addActionListener(this);
  jl2=new JLabel("");
  jl2.setForeground(Color.red);
  jf.getContentPane().add(jl);
  jt=new JTable(tm);
  jt.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  this.jt.getSelectionModel().addListSelectionListener(this);

  s = new JScrollPane(jt);
  jf.getContentPane().add(s);
  jf.getContentPane().add(new JLabel("学号:"));
  jf.getContentPane().add(jid);
  jf.getContentPane().add(new JLabel("姓名:"));
  jf.getContentPane().add(jname);
  jf.getContentPane().add(new JLabel("分数:"));
  jf.getContentPane().add(jscore);
  jf.getContentPane().add(add);
  jf.getContentPane().add(drop);
  jf.getContentPane().add(del);
  jf.getContentPane().add(new JLabel("搜索学生:"));
  jf.getContentPane().add(dataList);
  jf.getContentPane().add(se);
  jf.getContentPane().add(jbse);
  jf.getContentPane().add(flush);
  jf.getContentPane().add(go);
  jf.getContentPane().add(jl2);

}
public void exce(String exce)
{
try
{ this.jt.getSelectionModel().removeListSelectionListener(this);
  rs = execQuery(exce);
  vect.removeAllElements();
  tm.fireTableDataChanged();
  total=0;
  while(rs.next())
  {
   Vector rec_vector=new Vector();
   rec_vector.addElement(rs.getString(1));
   rec_vector.addElement(rs.getString(2));
   rec_vector.addElement(rs.getString(3));
   vect.addElement(rec_vector);
      total++;
  }
  k=total;
  this.closeDB();
  System.out.println("vect是面有"+total+"记录执行操作");
  System.out.println("成功执行:"+exce);
  this.jt.getSelectionModel().addListSelectionListener(this);

}
catch(Exception ee)
{
  jl2.setText("无法执行,请填入正确的数据");
  System.out.println("执行失败,可能查询为空");
  k=0;

}
}

public void excesql(String sql)
{
try
{
conBuild();
Statement stm=conn.createStatement();
stm.executeUpdate(sql);
jf.repaint();
jl2.setText("操作已执行");
System.out.println("成功执行:"+sql);
this.closeDB();
}
catch(Exception ee)
{
jl2.setText("无法执行,请填入正确的数据");
System.out.println(sql+"无法执行");
}
}

public static void regDriver()//register JDBC 桥接 driver
{
      try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();//关键句1
      System.out.println("驱动注册成功");
      }
       catch(Exception e)
     {
   System.out.println("无法创建驱动程序实体!");
}

}
   //建立数据库连接
public static void conBuild()//建立JDBC连接
{
   try{
     MyAccess.regDriver();
     conn=DriverManager.getConnection("jdbc:odbc:myDSN","","");//关键句2
     conn.setAutoCommit(true);
     System.out.println("成功连接数据库");
     }
     catch(Exception e)
     {
      System.out.println(e.getMessage()) ;
      System.out.println("无法连接数据库Connection!，运行之前请先设置数据源 MyDSN");
     }
}

public static ResultSet execQuery(String stmt1)//执行查询语句
    {
     try{
   conBuild();
      comm=conn.createStatement();
      rs=comm.executeQuery(stmt1);
      return rs;
     }
     catch(Exception e)
      {
       System.out.println("无法创建Statement!");return null;
      }
}

public static void closeDB()
{
        try{
          comm.close();
          conn.close();
          System.out.println("关闭记录集，断开数据库");
          }
          catch(Exception e)
         {
          System.out.println(e.getMessage());
         }
}

public void actionPerformed(ActionEvent ee)// 实现ActionListener中的唯一方法
{
if(ee.getSource()==go)
{
  try
  {

   if(i==0)
   {
    exce("SELECT * FROM 成绩 order by 分数");
    i=1;
    go.setText("分数(高->低)");
   }

   else
   {
    exce("SELECT * FROM 成绩 order by 分数 desc");
    i=0;
    go.setText("分数(低->高)");
   }

   jl2.setText("已按分数排序");

  }
  catch(Exception go)
  {
   System.out.println("出现错误");
   jl2.setText("提示:出现错误");
  }

}
if(ee.getSource()==add)
{
  this.excesql("insert into 成绩 values('"+jid.getText()+"','"+jname.getText()+"','"+jscore.getText()+"')");
  exce("SELECT * FROM 成绩 order by 学号");
  jid.setText("");
  jname.setText("");
  jscore.setText("");
  jf.repaint();

  System.out.println("执行添加操作");


}

if(ee.getSource()==drop)
{
  this.excesql("update 成绩 set 姓名='"+jname.getText()+"' ,分数="+jscore.getText()+" where 学号='"+jid.getText()+"'" );
  exce("SELECT * FROM 成绩 order by 学号");

}
if(ee.getSource()==del)
{
  this.excesql("delete from 成绩 where 学号='"+jid.getText()+"'");
  exce("SELECT * FROM 成绩 order by 学号");
  jl2.setText("提示:成功删除ID为"+jid.getText()+"的数据");
  System.out.println("执行删除操作");

}
if(ee.getSource()==jbse)
{
  if(dataList.getSelectedIndex()>=4)
  {
   String sql="SELECT * FROM 成绩 WHERE "+dataList.getSelectedItem()+se.getText();
   exce(sql);
  }
  else
  {
   String sql="SELECT * FROM 成绩 WHERE "+dataList.getSelectedItem()+"'"+se.getText()+"'";
   exce(sql);
  }
  jl2.setText("搜索结果:共"+k+"条数据");
  System.out.println(k+"执行搜索操作");

  jf.repaint();
}

if(ee.getSource()==flush)
{
  exce("SELECT * FROM 成绩 order by 学号");
  jid.setText("");
  jname.setText("");
  jscore.setText("");
  se.setText("");
  jf.repaint();
  jl2.setText("提示:刷新成功");

}

}

public void valueChanged(ListSelectionEvent el) //每当选择值发生更改时调用。
{
  row=0;
  row=jt.getSelectedRow();
  if(row<0) row=0;
  Object row_id=jt.getValueAt(row,0);
  Object row_name=jt.getValueAt(row,1);
  Object row_score=jt.getValueAt(row,2);

  jid.setText(row_id.toString());
  jname.setText(row_name.toString());
  jscore.setText(row_score.toString());
  System.out.println("选择已改变"+k+" "+total);


}

public static void main(String s[])
      {
     MyAccess ma=new MyAccess();
  ma.exce("SELECT * FROM 成绩 order by 学号");
     ma.jf.setVisible(true);

      }

}

url: http://www.blogjava.net/Files/yangcai/孝感学院JAVA成绩管理系统.rar

杨彩 2007-01-13 12:25 发表评论

Tcp通信实现两机互相通信

杨彩 — Thu, 07 Dec 2006 23:28:00 GMT

//QQ客户端

import java.io.*;
import java.net.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

public class yc extends JFrame
{
public static JLabel jl1,jl2;
public static TextArea ta1,ta2;
public static JButton jb1,jb2;
public static Container cp1;
static Socket svr;
public static PrintWriter out;

public static void main(String arg[])
{
  JFrame jf=new JFrame("与小新聊天--VIP             客户端");
  jf.setSize(500,450);
  jf.setResizable(false);
  jf.locate(100,100);
//  cp1=getContentPane();
  jl1=new JLabel("连接中....");
  ta1=new TextArea();
  ta2=new TextArea();
  jb1=new JButton("发送");
  jb1.addActionListener(new Listener());
  jb2=new JButton("清空");
  jb2.addActionListener(new Listener());
  jf.getContentPane().setLayout(new FlowLayout());
  jf.getContentPane().add(jl1);
   jf.getContentPane().add(ta1);
   jf.getContentPane().add(ta2);
   jf.getContentPane().add(jb1);
   jf.getContentPane().add(jb2);

  jf.setVisible(true);
  try
  {
   target2 outmsg2=new target2();
   Thread outthread2=new Thread(outmsg2);
   outthread2.start();
   QQ();

  }
  catch(Exception e)
  {

  }


}

static void QQ()throws Exception
{
System.out.println("正在连接服务器,请稍候...");
//与指定地址的服务器相连接
svr=new Socket("127.0.0.1",3300);//要连接远程主机请填IP
//svr=new Socket(InetAddress.getLocalHost(),3300)
jl1.setText("与"+svr.getInetAddress()+"连接成功!请输出要传送的信息...");

}

}

class Listener implements ActionListener{
  public void actionPerformed(ActionEvent e)
  {

    if(e.getSource()==yc.jb2)
     {
        yc.ta1.setText("");
     }

    else
    {
    try
    {

    yc.out=new PrintWriter(yc.svr.getOutputStream());
    yc.out.println(yc.ta2.getText());
    yc.out.flush();
    yc.ta1.append("[自己]说:\n"+yc.ta2.getText()+"\n");
    yc.ta2.setText("");


    }
     catch(Exception ee)
     {

     }

    }

  }
}

class target2 implements Runnable
{
public void run()
{

    while(true)
    {

   try
   {

    BufferedReader in=new BufferedReader(new InputStreamReader(yc.svr.getInputStream()));
    String str=in.readLine();
       str="[服务端"+yc.svr.getInetAddress()+"]说:\n"+str;
       yc.ta1.append(str+"\n");
   }

   catch(Exception ee)
   {
    ;
   }



     }
}
}

————————————————————————————————

//QQ服务端

import java.io.*;
import java.net.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

public class ycserver extends JFrame
{
public static JLabel jl1;
public static TextArea ta1,ta2;
public static JButton jb1,jb2;
public static Container cp1;
public static ServerSocket svr;
public static Socket clt;
public static Thread thread;
public static int i=0;

public static void main(String arg[])
{
  JFrame jf=new JFrame("与杨彩聊天--VIP            服务端");
  jf.setSize(500,450);
  jf.locate(200,200);
  jf.setResizable(false);
  ta1=new TextArea();
  ta2=new TextArea();
  jb1=new JButton("发送");
  jb2=new JButton("清空");
  jl1=new JLabel("等待连接");
  jb1.addActionListener(new jb1Listener());
  jb2.addActionListener(new jb1Listener());
  jf.getContentPane().setLayout(new FlowLayout());
  jf.getContentPane().add(jl1);
   jf.getContentPane().add(ta1);
   jf.getContentPane().add(ta2);
   jf.getContentPane().add(jb1);
   jf.getContentPane().add(jb2);

  jf.setVisible(true);
  try
  {
   target outmsg=new target();
   Thread outthread=new Thread(outmsg);
   outthread.start();

   wait wait1=new wait();
   Thread waitthread=new Thread(wait1);
   waitthread.start();

   QQ();

  }
  catch(Exception e)
  {

  }


}

static void QQ()throws Exception
{/*
//建立服务器套节字
svr=new ServerSocket(3300);
System.out.println("等待连接....");
//等待客户机接入
   clt=svr.accept();
    i++;
    ta1.setText(i+"");
//获得客户IP地址
System.out.println("连接请求来自:"+clt.getInetAddress());
jl1.setText("连接请求来自:"+clt.getInetAddress());
//建立I/O流
*/

}

}

class jb1Listener implements ActionListener
{
  public void actionPerformed(ActionEvent e)
  {
   if(e.getSource()==ycserver.jb2)
   {
    ycserver.ta1.setText("");
   }

   else
   {
     try
    {

   PrintWriter out=new PrintWriter(ycserver.clt.getOutputStream());
   out.println(ycserver.ta2.getText());
   out.flush();
    ycserver.ta1.append("[自己]说:\n"+ycserver.ta2.getText()+"\n");
    ycserver.ta2.setText("");


    }
     catch(Exception ee)
     {

     }
   }

  }
}

class target implements Runnable
{
public void run()
{

    while(true)
    {

   try
   {
    BufferedReader in=new BufferedReader(new InputStreamReader(ycserver.clt.getInputStream()));
    String str=in.readLine();
       str="[客户端在"+ycserver.clt.getInetAddress()+"]说:\n"+str;
       ycserver.ta1.append(str+"\n");
   }

   catch(Exception ee)
   {
    ;
   }



     }
}
}

class wait implements Runnable
{
public void run()
{

    while(true)
    {

   try
   {
    //建立服务器套节字
ycserver.svr=new ServerSocket(3300);
System.out.println("等待连接....");
//等待客户机接入
   ycserver.clt=ycserver.svr.accept();
    ycserver.i+=2;
    ycserver.ta1.setText(ycserver.i+"");
//获得客户IP地址
System.out.println("连接请求来自:"+ycserver.clt.getInetAddress());
ycserver.jl1.setText("连接请求来自:"+ycserver.clt.getInetAddress());
//建立I/O流
   }

   catch(Exception ee)
   {
    ;
   }



     }
}
}

源码下载：

http://www.blogjava.net/Files/yangcai/qq.rar

杨彩 2006-12-08 07:28 发表评论

比较完整的Java计算器

杨彩 — Tue, 14 Nov 2006 05:35:00 GMT

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

public class calculator extends JFrame implements ActionListener
{//这里我把JFrame写成Frame，这个错误找了好久
JFrame frame;

private JButton jia=new JButton("+");
private JButton jian=new JButton("-");
private JButton cheng=new JButton("*");
private JButton chu=new JButton("/");
private JButton qiuyi=new JButton("%");
private JButton deng=new JButton("=");
private JButton fu=new JButton("+/-");
private JButton dian=new JButton(".");
private JButton kai=new JButton("sqrt");
private JButton diao=new JButton("1/x");
private JButton aa=new JButton("A");
private JButton bb=new JButton("B");
private JButton cc=new JButton("C");
private JButton dd=new JButton("D");
private JButton ee=new JButton("E");
private JButton ff=new JButton("F");

private TextField k1=new TextField();
private objConversion convert = new objConversion();

JMenuItem copy,paste,s,t,help,about,me;
JRadioButton sixteen,ten,eight,two;
JButton backspace,ce,c,num0,num1,num2,num3,num4,num5,num6,num7,num8,num9;
Container cp;

JTextField text;
String copycontent="";
boolean clickable=true,clear=true;
int all=0;
double qian;
String fuhao;
int jin=10,first=1;

public calculator()
{
  setTitle("计算器－杨彩制作");
  setSize(400,300);
  setLocation(250,200);
  text=new JTextField(25);
// text.setEnabled(false);
  text.setText("0.");
  text.setHorizontalAlignment(JTextField.RIGHT);//从右到左

  JPanel cp1=new JPanel();
  JPanel cp2=new JPanel();
  JPanel cp3=new JPanel();

  cp=getContentPane();
  cp.add(cp1,"North");
  cp.add(cp2,"Center");
  cp.add(cp3,"South");

  cp1.setLayout(new GridLayout(1,6));
  cp2.setLayout(new GridLayout(2,4));
  cp3.setLayout(new GridLayout(6,6));

  sixteen=new JRadioButton("十六进制");
  sixteen.setVisible(false);
  ten=new JRadioButton("十进制",true);
  ten.setVisible(false);
  eight=new JRadioButton("八进制");
  eight.setVisible(false);
  two=new JRadioButton("二进制");
  two.setVisible(false);
  sixteen.addActionListener(this);
  ten.addActionListener(this);
  eight.addActionListener(this);
  two.addActionListener(this);
  ButtonGroup btg=new ButtonGroup();

  btg.add(sixteen);
  btg.add(ten);
  btg.add(eight);
  btg.add(two);

  JTextField t3=new JTextField(25);
  cp1.add(text);
// text.setEnabled(false);
  text.setEditable(false);
  text.setBackground(new Color(255, 255, 255));

  cp2.add(sixteen);
  cp2.add(ten);
  cp2.add(eight);
  cp2.add(two);

  backspace=new JButton("Backspace");
  backspace.setForeground(new Color(255,0,0));
  backspace.addActionListener(this);
  ce=new JButton("CE");
  ce.setForeground(new Color(255,0,0));
  ce.addActionListener(this);
  c=new JButton("C");
  c.setForeground(new Color(255,0,0));
  c.addActionListener(this);
  k1.setVisible(false);
  cp2.add(k1);
  cp2.add(backspace);
  cp2.add(ce);
  cp2.add(c);

  num0=new JButton("0");
  num1=new JButton("1");
  num2=new JButton("2");
  num3=new JButton("3");
  num4=new JButton("4");
  num5=new JButton("5");
  num6=new JButton("6");
  num7=new JButton("7");
  num8=new JButton("8");
  num9=new JButton("9");

  cp3.add(num7);
  num7.addActionListener(this);
  cp3.add(num8);
  num8.addActionListener(this);
  cp3.add(num9);
  num9.addActionListener(this);
  cp3.add(chu);
  chu.setForeground(new Color(255,0,0));
  chu.addActionListener(this);
  cp3.add(kai);
  kai.addActionListener(this);
  cp3.add(num4);
  num4.addActionListener(this);
  cp3.add(num5);
  num5.addActionListener(this);
  cp3.add(num6);
  num6.addActionListener(this);
  cp3.add(cheng);
  cheng.setForeground(new Color(255,0,0));
  cheng.addActionListener(this);
  cp3.add(qiuyi);
  qiuyi.addActionListener(this);
  cp3.add(num1);
  num1.addActionListener(this);
  cp3.add(num2);
  num2.addActionListener(this);
  cp3.add(num3);
  num3.addActionListener(this);
  cp3.add(jian);
  jian.setForeground(new Color(255,0,0));
  jian.addActionListener(this);
  cp3.add(diao);
  diao.addActionListener(this);
  cp3.add(num0);
  num0.addActionListener(this);
  cp3.add(fu);
  fu.addActionListener(this);
  cp3.add(dian);
  dian.addActionListener(this);
  cp3.add(jia);
  jia.setForeground(new Color(255,0,0));
  jia.addActionListener(this);
  cp3.add(deng);
  deng.setForeground(new Color(255,0,0));
  deng.addActionListener(this);
  cp3.add(aa);
  aa.addActionListener(this);
  cp3.add(bb);
  bb.addActionListener(this);
  cp3.add(cc);
  cc.addActionListener(this);
  cp3.add(dd);
  dd.addActionListener(this);
  cp3.add(ee);
  ee.addActionListener(this);
  cp3.add(ff);
  ff.addActionListener(this);
  aa.setVisible(false);
  bb.setVisible(false);
  cc.setVisible(false);
  dd.setVisible(false);
  ee.setVisible(false);
  ff.setVisible(false);

  JMenuBar mainMenu = new JMenuBar();
  setJMenuBar(mainMenu);
  JMenu editMenu = new JMenu("编辑");
  JMenu viewMenu = new JMenu("查看");
  JMenu helpMenu = new JMenu("帮助");
  mainMenu.add(editMenu);
  mainMenu.add(viewMenu);
  mainMenu.add(helpMenu);

  copy = new JMenuItem(" 复制");
  paste = new JMenuItem(" 粘贴");
  KeyStroke copyks=KeyStroke.getKeyStroke(KeyEvent.VK_C,Event.CTRL_MASK);
  copy.setAccelerator(copyks);//设置退出菜单选项加上快捷键
  KeyStroke pasteks=KeyStroke.getKeyStroke(KeyEvent.VK_V,Event.CTRL_MASK);
  paste.setAccelerator(pasteks);//设置退出菜单选项加上快捷键
  editMenu.add(copy);
  editMenu.add(paste);
  copy.addActionListener(this);
  paste.addActionListener(this);

  t = new JMenuItem("●标准型");
  s = new JMenuItem("   科学型");
  viewMenu.add(t);
  viewMenu.add(s);
  t.addActionListener(this);
  s.addActionListener(this);

  help = new JMenuItem(" 帮助主题");
  about = new JMenuItem(" 关于计算器");
  me = new JMenuItem(" 作者主页");
  helpMenu.add(help);
  helpMenu.add(about);
  helpMenu.add(me);
  help.addActionListener(this);
  about.addActionListener(this);
  me.addActionListener(this);

addWindowListener(new WindowDestroyer());//结束窗口
}

public void actionPerformed(ActionEvent e)

{//响应动作代码

  if(first==1)
  text.setText("");
  first=0;//第一次把文本框0.清空

Object temp = e.getSource();

if(temp==copy)
{
   copycontent = text.getText();
  }
  if(temp==paste)
{
   text.setText(text.getText()+copycontent);

  }
  if(temp==t)
  {//标准

   sixteen.setVisible(false);
   ten.setVisible(false);
   eight.setVisible(false);
   two.setVisible(false);
   t.setText("●标准型");
   s.setText("    科学型");
   aa.setVisible(false);
   bb.setVisible(false);
   cc.setVisible(false);
   dd.setVisible(false);
   ee.setVisible(false);
   ff.setVisible(false);
  }
  if(temp==s)
  {//科学

   sixteen.setVisible(true);
   ten.setVisible(true);
   eight.setVisible(true);
   two.setVisible(true);
   t.setText("   标准型");
   s.setText("●科学型");
   aa.setVisible(true);
   bb.setVisible(true);
   cc.setVisible(true);
   dd.setVisible(true);
   ee.setVisible(true);
   ff.setVisible(true);
   aa.setEnabled(false);
   bb.setEnabled(false);
   cc.setEnabled(false);
   dd.setEnabled(false);
   ee.setEnabled(false);
   ff.setEnabled(false);


  }
  if(temp==help)
  { //打开系统帮助文件要查资料
   try
   {
     String filePath = "C:/WINDOWS/Help/calc.chm";
      Runtime.getRuntime().exec("cmd.exe /c "+filePath);

   }
   catch(Exception eeee)
   {
    System.out.println("打开系统的计算器出错");
   }
  }
  if(temp==about)
  {
   JOptionPane.showMessageDialog(frame,"      Java计算器\n      杨彩制作\n\n http://blog.sina.com.cn/m/yangcai","关于计算器",JOptionPane.INFORMATION_MESSAGE); ;
  }
  if(temp==me)
  {
   try
   {
    Process p = Runtime.getRuntime().exec("explorer http://blog.sina.com.cn/m/yangcai");
   }
   catch(Exception eeee)
   {
    System.out.println("打开指定网页出错");
   }
  }


  try
  {
  if(temp==sixteen)
  {
   String hex=text.getText();
   int inthex=Integer.parseInt(hex,jin);//先把数变为10进制
   text.setText(convert.decHex(inthex)) ;
   jin=16;
   aa.setEnabled(true);
   bb.setEnabled(true);
   cc.setEnabled(true);
   dd.setEnabled(true);
   ee.setEnabled(true);
   ff.setEnabled(true);
   num2.setEnabled(true);
   num3.setEnabled(true);
   num4.setEnabled(true);
   num5.setEnabled(true);
   num6.setEnabled(true);
   num7.setEnabled(true);
   num8.setEnabled(true);
   num9.setEnabled(true);

  }
  if(temp==eight)
  {
   String oct =text.getText();
   int intoct=Integer.parseInt(oct,jin);
   text.setText(convert.decOct(intoct)) ;
   jin=8;

   aa.setEnabled(false);
   bb.setEnabled(false);
   cc.setEnabled(false);
   dd.setEnabled(false);
   ee.setEnabled(false);
   ff.setEnabled(false);
   num2.setEnabled(true);
   num3.setEnabled(true);
   num4.setEnabled(true);
   num5.setEnabled(true);
   num6.setEnabled(true);
   num7.setEnabled(true);
   num8.setEnabled(false);
   num9.setEnabled(false);
  }
  if(temp==two)
  {
   String bin=text.getText();
   int intbin=Integer.parseInt(bin,jin);
   text.setText(convert.decBin(intbin));
   jin=2;

   aa.setEnabled(false);
   bb.setEnabled(false);
   cc.setEnabled(false);
   dd.setEnabled(false);
   ee.setEnabled(false);
   ff.setEnabled(false);
   num2.setEnabled(false);
   num3.setEnabled(false);
   num4.setEnabled(false);
   num5.setEnabled(false);
   num6.setEnabled(false);
   num7.setEnabled(false);
   num8.setEnabled(false);
   num9.setEnabled(false);
  }
  if(temp==ten)
  {
   String dec=text.getText();
   int intdec=Integer.parseInt(dec,jin);
  // text.setText(convert.decDec(intdec)); //本句会把123变成321
   text.setText(intdec+"");
   jin=10;
   aa.setEnabled(false);
   bb.setEnabled(false);
   cc.setEnabled(false);
   dd.setEnabled(false);
   ee.setEnabled(false);
   ff.setEnabled(false);
   num2.setEnabled(true);
   num3.setEnabled(true);
   num4.setEnabled(true);
   num5.setEnabled(true);
   num6.setEnabled(true);
   num7.setEnabled(true);
   num8.setEnabled(true);
   num9.setEnabled(true);
  }
  }
  catch(Exception ee)
  {
   System.out.println("转换出错,可能你没有输入任何字符");
   text.setText("转换出错");
   clear=false;
  }

  if(temp==backspace)
  {//退格
  String s = text.getText();
  text.setText("");
  for (int i = 0; i < s.length() - 1; i++)
  {
  char a = s.charAt(i);
  text.setText(text.getText() + a);
  }
  }

  if (temp==ce)
  {
   text.setText("0.");
   clear=true;
   first=1;
  }
  if (temp==c)
  {
   text.setText("0.");   ;
   clear=true;
   first=1;
  }

  if(temp==num0)
   {
    if(clear==false)//判断是否点击了符号位
    text.setText("");
    text.setText(text.getText()+"0");
   }

  if(temp==num1)
   {
    if(clear==false)
    text.setText("");
    text.setText(text.getText()+"1");
    clear=true;//第二次不在清空（前二句）
   }

  if(temp==num2)
   {
    if(clear==false)
    text.setText("");
    text.setText(text.getText()+"2");
    clear=true;
   }

  if(temp==num3)
   {
    if(clear==false)
    text.setText("");
    text.setText(text.getText()+"3");
    clear=true;
   }

  if(temp==num4)
   {
    if(clear==false)
    text.setText("");
    text.setText(text.getText()+"4");
    clear=true;
   }

  if(temp==num5)
   {
    if(clear==false)
    text.setText("");
    text.setText(text.getText()+"5");
    clear=true;
   }

  if(temp==num6)
   {
    if(clear==false)
    text.setText("");
    text.setText(text.getText()+"6");
    clear=true;
   }
  if(temp==num7)
   {
    if(clear==false)
    text.setText("");
    text.setText(text.getText()+"7");
    clear=true;
   }

  if(temp==num8)
   {
    if(clear==false)
    text.setText("");
    text.setText(text.getText()+"8");
    clear=true;
   }

  if(temp==num9)
   {
    if(clear==false)
    text.setText("");
    text.setText(text.getText()+"9");
    clear=true;
   }
   if(temp==aa)
   {
    text.setText(text.getText()+"A");
   }
  if(temp==bb)
   {
    text.setText(text.getText()+"B");
   }

  if(temp==cc)
   {
    text.setText(text.getText()+"C");
   }

  if(temp==dd)
   {
    text.setText(text.getText()+"D");
   }

  if(temp==ee)
   {
    text.setText(text.getText()+"E");
   }
  if(temp==ff)
   {
    text.setText(text.getText()+"F");
   }
   if(temp==dian)
   {
    clickable=true;
    for (int i = 0; i < text.getText().length(); i++)
   if ('.' == text.getText().charAt(i))
   {
   clickable=false;
   break;
   } //第一层判断是否里面含有小数点;

    if(clickable==true)//第二坛判断
    text.setText(text.getText()+".");

   }

  try
  {
   if(temp==jia)
   {//加法
    qian=Double.parseDouble(text.getText());
    fuhao="+";
    clear=false;
   }
   if(temp==jian)
   {
    qian=Double.parseDouble(text.getText());
    fuhao="-";
    clear=false;
    ;

   }
   if(temp==cheng)
   {
    qian=Double.parseDouble(text.getText());
    fuhao="*";
    clear=false;

   }
   if(temp==chu)
   {
    qian=Double.parseDouble(text.getText());
    fuhao="/";
    clear=false;

   }
   if(temp==deng)
   {
    double ss=Double.parseDouble(text.getText());
    text.setText("");
    if(fuhao=="+")
    text.setText(qian+ss+"");
    if(fuhao=="-")
    text.setText(qian-ss+"");
    if(fuhao=="*")
    text.setText(qian*ss+"");
    if(fuhao=="/")
    text.setText(qian/ss+"");
    clear=false;//要清空前一次的数据
    ;

   }

   if(temp==kai)
   {
  String s = text.getText();
  if (s.charAt(0) == '-')
  {
   text.setText("负数不能开根号");
  }
  else
  text.setText(Double.toString(java.lang.Math.sqrt(Double.parseDouble(text.getText()))));
  clear=false;
  }

  if(temp==diao)
  {

   if (text.getText().charAt(0) == '0'&&text.getText().length() == 1)
    {
    text.setText("除数不能为零");
    }
  else
  {
  boolean isDec = true;
   int i, j, k;
   String s = Double.toString(1 / Double.parseDouble(text.getText()));
   for (i = 0; i < s.length(); i++)
   if (s.charAt(i) == '.')
   break;
   for (j = i + 1; j < s.length(); j++)
   if (s.charAt(j) != '0')
   {
   isDec = false;
   break;
   }
   if (isDec == true)
   {
   String stemp = "";
   for (k = 0; k < i; k++)
    stemp += s.charAt(k);
    text.setText(stemp);
   }
   else
   text.setText(s);
   }

    clear=false;
  }
  if(temp==qiuyi)
  {
   text.setText("0");
   clear=false;
  }
  if (temp == fu)
  { //导师，此方法参考书中例子
   boolean isNumber = true;
   String s = text.getText();
   for (int i = 0; i < s.length(); i++)
   if (! (s.charAt(i) >= '0' && s.charAt(i) <= '9' || s.charAt(i) == '.' ||
   s.charAt(i) == '-'))
        {
     isNumber = false;
     break;
     }
   if (isNumber == true)
    {
   //如果当前字符串首字母有'-'号,代表现在是个负数,再按下时,则将首符号去掉
     if (s.charAt(0) == '-')
     {
     text.setText("");
     for (int i = 1; i < s.length(); i++)
         {
       char a = s.charAt(i);
       text.setText(text.getText() + a);
           }
     }
      //如果当前字符串第一个字符不是符号，则添加一个符号在首字母处
   else
   text.setText('-' + s);
   }
  }

}
catch(Exception eee)
{
  System.out.println("运算时,首先输入数字或字符");
  text.setText("运算出错");
  clear=false;
}



}

class WindowDestroyer extends WindowAdapter
{//退出窗口动作
  public void windowClosing(WindowEvent e)
  {
  System.exit(0);
  }
}

class objConversion
{//导师,本进制类参考了CSMD类转换例子

public void objConversion ()
{
}

public String decDec (int decNum)
{//10

  String strDecNum = Integer.toString(decNum);

  for (int i = strDecNum.length(); i < 3; i++)
  {
   strDecNum = "0" + strDecNum;
  }

// return strDecNum;
  return invert (strDecNum, 5);

}

public String decHex (int decNum)
{//10 to 16

  String strHexNum = "";
  int currentNum = 0;

  while (decNum != 0)
  {

   if (decNum > 15)
   {

    currentNum = decNum % 16;
    decNum /= 16;

   }
   else
   {

    currentNum = decNum;
    decNum = 0;

   }

   switch (currentNum)
   {

    case 15: strHexNum += "F";
       break;
    case 14: strHexNum += "E";
       break;
    case 13: strHexNum += "D";
       break;
    case 12: strHexNum += "C";
       break;
    case 11: strHexNum += "B";
       break;
    case 10: strHexNum += "A";
       break;
    default: strHexNum += Integer.toString(currentNum);
       break;

   }

  }

  return invert (strHexNum, 2);

}

public String decOct (int decNum)
{//10 to 8

  String strOctNum = "";

  while (decNum != 0)
  {

   if (decNum > 7)
   {

    strOctNum += Integer.toString(decNum % 8);
    decNum /= 8;

   }
   else
   {

    strOctNum += Integer.toString(decNum);
    decNum = 0;

   }

  }

  return invert (strOctNum, 3);

}

public String decBin (int decNum)
{//10 to 2

  String strBinNum = "";

  while (decNum != 0)
  {

   if (decNum > 1)
   {

    strBinNum += Integer.toString(decNum % 2);
    decNum /= 2;

   }
   else
   {

    strBinNum += Integer.toString(decNum);
    decNum = 0;

   }

  }

  return invert (strBinNum, 8);

}

private String invert (String strNum, int minLength) //转换长度
{

  String answer = "";
  int length = strNum.length();

  if (length < minLength)
  {

   for (int padding = (minLength - length); padding > 0; padding--)
   {
    answer += "0";
   }

  }

  for (int i = length; i > 0; i--)
  {
   answer += strNum.charAt (i - 1);
  }

  return answer;

}

}

public static void main(String arg[])//产生窗口
{
  calculator win = new calculator();
  win.setVisible(true);
}

}

杨彩 2006-11-14 13:35 发表评论