server.java

非富多彩的十六个J2ME的例子

import java.io.*;
import java.util.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;


public class server extends HttpServlet
{
    Connection con;
    ResultSet rst;
    Statement stat;
    int record;
    String record_String;
    
    public void doPost(HttpServletRequest request,HttpServletResponse response)	throws IOException,ServletException
    {
    	ServletInputStream is=request.getInputStream();
    	DataInputStream datain=new DataInputStream(is);
    	String datamidlet=datain.readUTF();
    	datain.close();
    	try
         {
              Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
              con=DriverManager.getConnection("jdbc:odbc:mydatasource","user8","");
              stat=con.createStatement();
              rst=stat.executeQuery("select Current_Banlance from Balance where pin_N0='"+datamidlet+"'");
             /* while(rst.next())
              {
                  record=rst.getInt("Current_balance);"	
              	
              }*/
              
              try
              {
                  if(con!=null)
                  con.close();	
              	
              }	
              
              catch(Exception e)
              {
                 System.out.println("error"+e);	
              }
         }
         
         catch(Exception ex)
         {
            System.out.println(ex);	
         }
    	
    	  record_String=new String(Integer.toString(record));
    	  StringTokenizer token= new StringTokenizer(record_String);
    	  Vector vector=new Vector();
    	  while(token.hasMoreTokens())
    	  {
    	     vector.addElement(token.nextToken());	
    	  	
    	  	
    	  }
    	  
    	  ByteArrayOutputStream byteout=new ByteArrayOutputStream();
    	  DataOutputStream dataout=new DataOutputStream(byteout);
    	  
    	  int size=vector.size();
    	  dataout.writeInt(size);
    	  
    	  for(int i=0;i<size;i++)
    	  {
    	     dataout.writeUTF((String)vector.elementAt(i));
    	     
    	  	
    	  }
    	  
    	  byte[] data=byteout.toByteArray();
    	  response.setContentType("application/octet-stream");
    	  response.setContentLength(data.length);
    	  response.setStatus(response.SC_OK);
    	  OutputStream output=response.getOutputStream();
    	  output.write(data);
    	  output.close();
    }
	
}