WebLogic Server 8.1 中的日志框架建立在 JDK 1.4 中引入的 Java 日志 API 函数基础上。 Java 日志 API 函数定义了标准接口来接收和处理日志事件。日志事件处理可以包括发送事件到自定义目标，如 JMS 队列，也可以控制发送到每个已配置目标文件的日志事件的容量。

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     package weblogic.logging.examples;

     import java.util.Date;

     import java.util.logging.ErrorManager;   

     import java.util.logging.Handler;

     import java.util.logging.LogRecord;

     import javax.mail.Message;

     import javax.mail.MessagingException;

     import javax.mail.Multipart;

     import javax.mail.Session;

     import javax.mail.Transport;

     import javax.mail.internet.AddressException;

     import javax.mail.internet.InternetAddress;

     import javax.mail.internet.MimeBodyPart;

     import javax.mail.internet.MimeMessage;

     import javax.mail.internet.MimeMultipart;

     import javax.naming.InitialContext;

     import javax.naming.NamingException;

     /** * This class demonstrates how to send email notifications based

      * on server log events

      */

     public class MailLogHandler extends Handler { 

      private Session session;   

      private String toAddress; 

      public MailLogHandler(String jndiName, String toAddr) throws NamingException {     

       InitialContext ctx = new InitialContext();   

       session = (Session)ctx.lookup(jndiName);   

       toAddress = toAddr; 

      } 

      public void close() { 

      } 

      public void flush() { 

      } 

      public void publish(LogRecord rec) {   

       // Check whether the log event can be published   

       // based on the Level and Filter settings   

       if (!isLoggable(rec)) {     

         return;   

       }   

       try {     

         Message   msg = new MimeMessage(session);     

         msg.setRecipients(Message.RecipientType.TO,                         

         InternetAddress.parse(toAddress, false));     

         msg.setSubject("Message received with severity " + rec.getLevel());       

         msg.setSentDate(new Date(rec.getMillis()));     

         // Content is stored in a MIME multi-part message with one body part       

         MimeBodyPart mbp = new MimeBodyPart();     

         mbp.setText(rec.getMessage());     

         Multipart mp = new MimeMultipart();       

         mp.addBodyPart(mbp);    

         msg.setContent(mp);    

         Transport.send(msg);   

       } catch(AddressException adex) {       

         reportError(adex.getMessage(), adex,                  

         ErrorManager.WRITE_FAILURE);   

       } catch(MessagingException mex) {     

         reportError(mex.getMessage(), mex,                 

         ErrorManager.WRITE_FAILURE);   

       } 

      }

     }

     package weblogic.logging.examples;

     import java.util.logging.Handler;

     import weblogic.logging.WLLevel;

     import weblogic.logging.LoggingHelper;

     /**

      * This class sets up the MailLogHandler as a listener to the

      * Server Logger for log events.

      */

     public class MailStartup { 

      public static void main(String[] args) {   

       try {     

         Handler h = new MailLogHandler("MyMailSession", "sandeeps@bea.com");     

         h.setLevel(WLLevel.CRITICAL);     

         LoggingHelper.getServerLogger().addHandler(h);   

       } catch(javax.naming.NamingException nmex) {     

         System.err.println("Error adding MailLogHandler" + nmex.getMessage());   

       } 

      }

     }