java

DemoNtpMessage.java

rac — Tue, 15 Jan 2008 09:49:16 +0100

package hsz.ITDP.rac.uebungen.SNTPclientServer;
 
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
 
 
/**
 * This class represents a NTP message, as specified in RFC 2030.  The message
 * format is compatible with all versions of NTP and SNTP.
 *
 * This class does not support the optional authentication protocol, and
 * ignores the key ID and message digest fields.
 * 
 * For convenience, this class exposes message values as native Java types, not
 * the NTP-specified data formats.  For example, timestamps are
 

SNTPclient.java

rac — Tue, 15 Jan 2008 09:46:25 +0100

package hsz.ITDP.rac.uebungen.SNTPclientServer;
 
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.text.DecimalFormat;
import java.util.*;
 
public class SNTPclient {
 
        /**
         * @param args
         */
        public static void main(String[] args) {
                String  sntpHost = "lisa.hsz-t.ch";
                int             sntpPort = 123;
 
                try { 
                      byte[] data = generatePacket(); 

echoserverThreaded.java

rac — Tue, 15 Jan 2008 09:40:06 +0100

package hsz.ITDP.rac.uebungen.echoClientSrv;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
 
 
public class echoserverThreaded implements Runnable {
        private Socket sock = null;
        public echoserverThreaded(Socket sockin) {
                System.out.println("create thread for "+sockin.getRemoteSocketAddress());
                this.sock = sockin;
        }
        public void run() {

echoclient.java

rac — Tue, 15 Jan 2008 09:36:56 +0100

package hsz.ITDP.rac.uebungen.echoClientSrv;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
 
 
public class echoclient {
public static void main(String[] args) throws IOException {
        BufferedReader in = null;
        PrintWriter out = null;
        BufferedReader user = null;
        Socket sock = null;
        String srvIP = "localhost"; //args[0];
        int srvPort = 9998;  // Integer.parseInt(args[1]);
        
        try {

ANT

rac — Sat, 05 Jan 2008 16:21:28 +0100

Aufbau von Ant-Files

Das Ant File heisst immer:

build.xml

Hällt man sich daran braucht man kein AntFile anzugeben.

project	Ant Files beginnen immer mit dem <project> Tag. Dieser geht über das ganze File und hat den Parameter default. Wird nichts anderes angegeben führt er das Target mit dem im default Parameter angegebenen Namen aus.
target	Der Target Tag ist im Projet enthalten. Er hat den Parameter name. Dieser Wert ist frei wählbar.
echo	Gibt die Message im Parameter message aus.

<project default="nina">
 <target name="franziska">

Load a big CSV file into a MySQL DB

rac — Wed, 02 Jan 2008 13:16:14 +0100

Used Libraries

mysql-connector-java-5.1.5-bin.jar

CSV2SQLImporter.java

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.SQLException;
 
class CSV2SQLImporter
{
        Connection conn = null;
    public CSV2SQLImporter()
    {
    }
 
    public boolean connect(String db_connect_str, 
  String db_userid, String db_password)
    {
        Connection conntmp;
        try 
        {
            Class.forName(  