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电梯直达

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发表于 2004-04-24 10:50 |只看该作者 |倒序浏览

这个程序可以连接sybase和sql server 须自己下载这个两个JDBC的驱动，在此贴出来，和大家交流，希望大家多多指点。
这个程序的缺点就是当数据量比较大的时候数据比较慢，希望大家给点好的建议，谢谢

我的邮件地址是wangwenhong@9448.com.cn
import java.awt.*;
import java.io.*;
import java.awt.event.*;
import java.sql.*;
import java.applet.*;

class DataBackGUI extends Applet
{
TextField TexTable;//表名
TextField TexUserID;//登陆用户名
TextField TexPass;//登陆密码
TextField TexPath;//文件保存路径
Choice ServerType ;//服务器类型
Label    TableName;//要备份的表名
Label    Pass;
Label    UserID;
Label    FilePath;
Button ButConn;//连接数据库
Button ButBuck;
TextArea  Message;
Connection myConn;
Statement myStmt;
ResultSet myResults;
String SQLText="";
//初始化界面
public void init()
{
setBackground(Color.lightGray);
setLayout(new GridBagLayout());
GridBagConstraints GBC = new GridBagConstraints();
ButConn =new Button("连接"

;
ButBuck =new Button("备份"

;
ButBuck.setEnabled(false);
TexTable =new TextField("",15);
TexUserID =new TextField("",15);
TexPass =new TextField("",15);
TexPath =new TextField("",15);
ServerType=new Choice();
ServerType.addItem("SQL Server"

;
ServerType.addItem("Sybase"

;
TexPass.setEchoChar('*');
TableName =new Label("表名："

;
Pass =new Label("密码："

;
UserID =new Label("用户名："

;
FilePath =new Label("保存路径："

;
      Message =new TextArea(30,80);
Message.setEnabled(false);
GBC.gridwidth= GridBagConstraints.REMAINDER;
GBC.fill    = GridBagConstraints.HORIZONTAL;
GBC.gridwidth=1;
((GridBagLayout)getLayout()).setConstraints(ServerType,GBC);
add(ServerType);
((GridBagLayout)getLayout()).setConstraints(UserID,GBC);
add(UserID);
((GridBagLayout)getLayout()).setConstraints(TexUserID,GBC);
add(TexUserID);
((GridBagLayout)getLayout()).setConstraints(Pass,GBC);
add(Pass);
GBC.gridwidth=GridBagConstraints.REMAINDER;
((GridBagLayout)getLayout()).setConstraints(TexPass,GBC);
add(TexPass);

      GBC.gridwidth=1;
((GridBagLayout)getLayout()).setConstraints(TableName,GBC);
add(TableName);
((GridBagLayout)getLayout()).setConstraints(TableName,GBC);
add(TexTable);
      GBC.gridwidth=GridBagConstraints.REMAINDER;
((GridBagLayout)getLayout()).setConstraints(ButConn,GBC);
add(ButConn);

      GBC.gridwidth=1;
((GridBagLayout)getLayout()).setConstraints(FilePath,GBC);
add(FilePath);
((GridBagLayout)getLayout()).setConstraints(TexPath,GBC);
add(TexPath);
      GBC.gridwidth=GridBagConstraints.REMAINDER;
      ((GridBagLayout)getLayout()).setConstraints(ButBuck,GBC);
add(ButBuck);

GBC.gridwidth=GridBagConstraints.REMAINDER;
      GBC.fill    = GridBagConstraints.HORIZONTAL;
      ((GridBagLayout)getLayout()).setConstraints(Message,GBC);
      add(Message);
}
//连接到数据库并执行查询语句
public boolean conntection()
{
try
{
if (ServerType.getSelectedIndex()==0)
{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver"

.newInstance();
myConn=DriverManager.getConnection("jdbc:microsoft:sqlserver://VITTY:1433;databasename=XGS_SCJY",TexUserID.getText(),TexPass.getText());
}
if (ServerType.getSelectedIndex()==1)
{
Class.forName("com.sybase.jdbc2.jdbc.SybDriver"

.newInstance();
            myConn = DriverManager.getConnection("jdbc:sybase:Tds:162.105.167.3:8000/JYGS_JXC_TEST?charset=eucgb&jconnect_version=0",TexUserID.getText(),TexPass.getText());
}
System.out.println(ServerType.getSelectedIndex());
      myStmt = myConn.createStatement();
SQLText="select * from "+TexTable.getText();
      myResults = myStmt.executeQuery(SQLText);
return true;
}
catch(SQLException es)
{
return false;
}
      catch(Exception ee)
{
return false;
}
}
public boolean action(Event evt,Object obj)
{
if (evt.target == ButConn)
{
if (conntection())
{
ButBuck.setEnabled(true);
ButConn.setEnabled(false);
}
else
{
      Message.append("连接数据库失败！");
Message.append("\n");
}
return true;
}
if (evt.target==ButBuck)
{
ButBuck.setEnabled(false);
Message.append("正在导出数据，请稍后.....");
Message.append("\n");
if (AppendtoFile())
{
      ButConn.setEnabled(true);
Message.append("数据导出成功，保存在："+TexPath.getText()+TexTable.getText()+".txt");
Message.append("\n");
}
else
{
Message.append("数据导出失败！");
Message.append("\n");
}
return true;
}
return super.action(evt,obj);
}

public boolean AppendtoFile()
{
try
{
      int filelength;
      int writelength;
      String myFilePath=TexPath.getText();
         String myFileName=TexTable.getText()+".txt";
String Values;
      ResultSetMetaData MetaData=myResults.getMetaData();
      int col=MetaData.getColumnCount();
      while (myResults.next())
      {
      for (int i=1;i<=col ;i++ )
      {
   File f=new File(myFilePath,myFileName);
      filelength=(int)f.length();
   Values=myResults.getString(i);
   if (Values==null)
   {
   Values="null";
   }
                  writelength=Values.length();
               BufferedWriter out = new BufferedWriter(new FileWriter(f,true));
                  out.write(Values,0,writelength);
               out.write(" ",0,3);
   if (i==col)
   {
   out.newLine();
   }
               out.flush();
               out.close();
}
}
      }
      catch(IOException e)
      {
        System.out.println(e);
return false;
      }
catch(SQLException es)
{
System.out.println(es);
return false;
}
return true;
}

public static void main(String[] args)
{
      Frame f=new Frame("数据备份程序");
f.addWindowListener(new WindowAdapter()
{
         public void windowClosing(WindowEvent e)
      {
            System.exit(0);
         }
});
DataBackGUI back = new  DataBackGUI();
back.init();
f.add(back);
f.pack();
f.setVisible(true);

}
}