Steven Ho

I have added the entire complete classpath
CLASSPATH=.:/usr/local/jdk/lib/classes.zip:/usr/local/jakarta/lib/activation.jar:/usr/local/jakarta/lib/cimapi.jar:/usr/local/jakarta/lib/client.jar:/usr/local/jakarta/lib/crimson.jar:/usr/local/jakarta/lib/dom4j.jar:/usr/local/jakarta/lib/fscontext.jar:/usr/local/jakarta/lib/imap.jar:/usr/local/jakarta/lib/jaas.jar:/usr/local/jakarta/lib/jaxm-client.jar:/usr/local/jakarta/lib/jaxm.jar:/usr/local/jakarta/lib/jaxr-api.jar:/usr/local/jakarta/lib/jaxr-apidoc.jar:/usr/local/jakarta/lib/jaxr-browser. jar:/usr/local/jakarta/lib/jaxr-ri.jar:/usr/local/jakarta/lib/jaxrpc-api.jar:/usr/local/jakarta/lib/jaxrpc-ri.jar:/usr/local/jakarta/lib/jcert.jar:/usr/local/jakarta/lib/jdbc2_0-stdext.jar:/usr/local/jakarta/lib/jmx_remoting.jar:/usr/local/jakarta/lib/jmxgrinder.jar:/usr/local/jakarta/lib/jmxri.jar:/usr/local/jakarta/lib/jmxtools.jar:/usr/local/jakarta/lib/jndi.jar:/usr/local/jakarta/lib/jnet.jar:/usr/local/jakarta/lib/jsse.jar:/usr/local/jakarta/lib/jta.jar:/usr/local/jakarta/lib/ldap.jar:/usr/ local/jakarta/lib/log4j.jar:/usr/local/jakarta/lib/mail.jar:/usr/local/jakarta/lib/mailapi.jar:/usr/local/jakarta/lib/mm.mysql-2.0.11-bin.jar:/usr/local/jakarta/lib/mof2mbean.jar:/usr/local/jakarta/lib/mofcomp.jar:/usr/local/jakarta/lib/pop3.jar:/usr/local/jakarta/lib/providerutil.jar:/usr/local/jakarta/lib/relaxer.jar:/usr/local/jakarta/lib/smtp.jar:/usr/local/jakarta/lib/soap.jar:/usr/local/jakarta/lib/tyrex-0.9.7.0.jar:/usr/local/jakarta/lib/xalan.jar:/usr/local/jakarta/lib/xerces.jar:/usr/lo cal/jakarta/lib/xercesSamples.jar:/usr/local/jakarta/lib/xml.jar
The exception is gone, but no output either
Anyway thanks for the help. Have a nice day.

Hello,
I am trying to run a Java application weekly that update database, and I am using Cron Job to do so.
The problem is I am trying to instantiate the Driver using
Class.forName("com.mysql.jdbc.Driver").newInstance();
and got exception as output "com.mysql.jdbc.Driver" others are stack trace...
I have developed database application on the same environment over many times, this problem only occured now because I am using Cron Job.
I tried to set the class path to the jar file without success.
Does anyone have any experience similar to this, and have found a solution?
Please help. Thanks.

Hello,
I have a file in
C:\tomcat\tomcat-4-1\webapps\test\WEB-INF\storage\dataindex.tbl
I am trying to delete it using new (File(filepath)).delete(); without successing. I have to manually shutdown Tomcat, and delete the file, if I didn't shutdown Tomcat, windows 2k will display "sharing violation" message.
What can I do to delete the file smoothly?
Any help is appreciated, Thanks.

I am new to the Cron Job, I am trying to schedule a Java program that print current Date on System.out every 5 minutes. I put inside the command line
is "java printBeep"
But the output I get from email is
<font size="2"> /bin/sh: java: command not found </font>
Please tell me where I went wrong, btw the interface only permits 1 line of command to input, and I can't seem to put more lines of command lines.
Please help if can, thank you all.
Have a nice day!
[ September 17, 2003: Message edited by: Steven Ho ]

Thank you very much Andrew for answering my question. I will try the solution you posted. Have a nice day.

Hello,
I am trying to run a thread on web server. The following is part of the code.
package undelivered.test; import java.util.*; import java.util.Timer; import java.util.TimerTask; public class undelivered { Timer timer; //I hope it runs always public undelivered(int second){ timer = new Timer(); timer.scheduleAtFixedRate(new checkmail(), new java.util.Date(Calendar.getInstance().getTimeInMillis()), second * 1000); } public static void main(String args[]){ System.out.println("Prepare to check undelivered email."); new undelivered(360); System.out.println("Check undelivered mail initiated."); } }
which checkmail() is another class that will read all email messages from particular account and update statistic into database. I have succeeded in executing this program in my Windows PC by running it in the command prompt.
My question is how to run this program on a redhat linux7.1 (no xwindows) web server? Do I execute it with "java undelivered &" in shell to make it execute in the background? If true, so how do I stop the thread if needed? (assume it is too heavy etc.) And where should I put the class files? Is there any restriction for thread to work in web server?
Any help will be highly appreciated. By the way, I am glad the server is working today.
Have a nice day,
Steven Ho

Hello,
bounced_email = mesg.substring(mesg.indexOf("this is email:")); bounced_email = bounced_email.substring(0, bounced_email.indexOf("\n")); bounced_email = bounced_email.substring("this is email:".length()); bounced_email = bounced_email.trim();
sorry, I forgot to mention the last character is always line break.
Thanks all for replying.

Hello all,
I have the code below,
<font size="2"> String text = " this is email: steven@yahoo.com "; </font>
The length of string may change often, more character may appear at the start or end sometime as the variable is modified, but the "this is email:" part exist all the time.
There is always 1 valid email only inside the string.
How do I extract the email from the string? Please provide code samples.
Thanks all.
[ September 09, 2003: Message edited by: Steven Ho ]

Hello,
I am trying to develope a web application using JSP or Servlets that will
1. read all email inside email account.(done in JSP)
2. summarize the total of emails, put in database (done in JSP).
Currently the administrator have to open the JSP files, click a button and
only then the process will start to put the total of emails inside database.
But I need to make these processes automated, like once every week, without administrator or anyone. How do I do that? Is using JSP and Servlets suitable for accomplishing the task above? Please help
Thanks in Advance!!!
[ September 04, 2003: Message edited by: Steven Ho ]
[ September 04, 2003: Message edited by: Steven Ho ]

Hello,
I am trying to format a nested table content from outside of this table but I am unable to change any coding within this nested table structure.
I have tried using <basefont> and BODY html tags in stylesheets without success.
In case anyone want to know, I can't change the coding because the table is extracted entirely from another website.
<table border=0 cellpadding=2 cellspacing=2 width=100%> <tr><td width="40%" align=right>Morning:</td><td width="60%">Weather fair</td></tr> <tr><td align=right>Afternoon:</td><td>Cloudy</td></tr> <tr><td align=right>Night:</td><td>Weather fair</td></tr> <tr><td align=right>Minimum:</td><td>24</td></tr> <tr><td align=right>Maximum:</td><td>33</td></tr> </table>
Thanks in advance,
Steven Ho

Thank you Jon, I have done my work based on your guidance.

I hava a BLOB column inside sample table. On the other hand I manage to get a byte array (byte[]) from files uploaded by form input field.
Is it possible to upload the byte array into the field? I am trying to add a file into database.
I tried to find a way to convert the byte array into BLOB using
byte[] b = .... populate it with byte data
Blob blob = null;
blob.setBytes(1, b);
This doesn't work because the blob object is null.
Please help, thank you all.

Peter,
Thank you so much, I am so relieved now. And I will examine the bouncycastle.org later.
Steven
[ March 16, 2003: Message edited by: Steven Ho ]

I have been developing a simple application where I need to encrypt and decrypt a short password sent by end user accross internet. The coding is working just fine. But I am worry whether I have violated the US cryptographic export restrictions by using these coding.
If I am, can anyone suggest an alternative to encrypt and decrypt the password?
Thank you all.
import java.io.*; import java.security.*; import javax.crypto.*; import sun.misc.*; /** *EnDec stands for Encryption and Decription, this class is primarily used for encrypting and decrypting *password. The variable keyFile must be reconfigured if this application were to deploy in a different *environment. *@author steven ho *@version 1.0 */ public class EnDec { private Key key; private String keyFile = "/usr/local/jakartatomcat/jakarta-tomcat-4.0.6/webapps/opencms/WEB-INF/config/des.key"; //private String keyFile = "C:/tomcat/tomcat-4-1/webapps/opencms/WEB-INF/config/des.key"; /** *Default Constructor */ public EnDec(){ }//EnDec() /** *Initialize the Key object with des.key file information. */ public void initKey(){ try{ ObjectInputStream in = new ObjectInputStream(new FileInputStream(keyFile)); key = (Key)in.readObject(); in.close(); }catch(Exception e){ System.err.println("Could not read the key from file des.key"); System.err.println(e); }//catch() }//initKey /** *Encrypt a text into a BASE 64 string to be store in database using Cipher. *@paramtextoriginal text to be encrypted. *@return result string in BASE 64 to be store in database. *@throws <code>Exception</code> if occurs. *@see Cipher *@see BASE64Encoder */ public String Encrypt(String text) throws Exception { String result = ""; Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, key); byte[] inputBytes = text.getBytes("UTF8"); byte[] outputBytes = cipher.doFinal(inputBytes); BASE64Encoder encoder = new BASE64Encoder(); result = encoder.encode(outputBytes); return result; }//Encrypt /** *Decrypt a text currently in BASE64 format into a normal string using Cipher. *@paramtextstring BASE 64 from database *@return resulta normal string *@throws <code>Exception</code> if occurs. *@see Cipher *@see BASE64Decoder */ public String Decrypt(String text) throws Exception{ String result = ""; Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, key); BASE64Decoder decoder = new BASE64Decoder(); byte[] inputBytes = decoder.decodeBuffer(text); byte[] outputBytes = cipher.doFinal(inputBytes); result = new String(outputBytes, "UTF8"); return result; }//Decrypt }//EnDec
[ March 14, 2003: Message edited by: Steven Ho ]

Hello,
I am trying to download a pdf file from database.
The coding did download some content, but these downloaded file's size appear to be smaller than it should be, comparing to blob in database. Original file size is 40kb but downloaded file size is 39kb as such.
Below is what I've done. Can someone please tell me what did I do wrong?
String query = "SELECT * FROM CHALET_MASTER where CM_IntID=1;"; ResultSet rs = stmt.executeQuery(query); if(rs.next()){ java.sql.Blob blob; blob = rs.getBlob(CM_BlbDocPdf); int iLength = (int)(blob.length()); response.setHeader("Content-Disposition", "attachment; filename=\"chalet.pdf\""); response.setContentType("application/pdf"); response.setContentLength(iLength); ServletOutputStream op = response.getOutputStream(); op.write(blob.getBytes(1, iLength)); op.flush(); op.close(); }else{ out.println("no file exist"); }
Have a nice day. Thank you all.
[ February 18, 2003: Message edited by: Steven Ho ]