inital commit

2012-02-10 22:42:30 +01:00
commit 115bd4d29f
27 changed files with 3331 additions and 0 deletions
@@ -0,0 +1,54 @@
+cd /Users/tilman/.m2/repository/hsqldb/hsqldb/1.8.0.10/
+java -cp hsqldb-1.8.0.10.jar org.hsqldb.util.DatabaseManager
+  jdbc:hsqldb:file:/Volumes/hidrive-mirror/Dokumente/Finanzen/Ausgaben-Datenbank/database/db
+  sa
+
+Export nach OOo Calc
+SELECT "Datum", "Name", "Betrag", "Beschreibung" FROM "Transaktionen" JOIN "Kategorien" ON "Kategorien"."ID" = "Transaktionen"."Kategorie" ORDER BY "Datum" ASC
+
+
+
+Starten:
+#!/bin/sh
+cd /media/usb/hidrive/Dokumente/Finanzen/Ausgaben-Datenbank/database
+screen -S HSQLDB sudo -u nobody java -Duser.timezone=Europe/Berlin -cp hsqldb-1.8.0.10.jar org.hsqldb.Server -database.0 file:db -dbname.0 transaktionen
+cd /media/usb/hidrive/Dokumente/Finanzen/Ausgaben-Datenbank
+screen -S Transaktionen sudo -u nobody java -Duser.timezone=Europe/Berlin -jar transaktionen.jar
+
+
+
+
+Transaktion einfügen und ID zurückliefern
+INSERT INTO "Transaktionen" ("ID", "Datum", "Kategorie", "Betrag", "Beschreibung") VALUES (null, CURDATE(), 32, 1.99, 'Test');
+CALL IDENTITY();
+
+Letzte Transaktion
+SELECT * FROM "Transaktionen" WHERE id=(SELECT Max(id) FROM "Transaktionen")
+
+Export
+SELECT "Datum", "Name", "Betrag", "Beschreibung" FROM "Transaktionen" JOIN "Kategorien" ON "Kategorien".ID="Transaktionen"."Kategorie"
+
+Letzte 10 Transaktionen
+SELECT * FROM "Transaktionen" ORDER BY ID desc LIMIT 10
+
+
+SELECT * FROM "Transaktionen" WHERE "Datum">'2011-01-01'
+
+SELECT "ID", "Datum", "Kategorie", "Betrag", "Beschreibung" FROM "Transaktionen" ORDER BY "Datum" desc, "ID" desc LIMIT 10
+
+
+
+UPDATE "Transaktionen" SET "Datum"='2011-11-08' WHERE "ID"=930
+UPDATE "Transaktionen" SET "Beschreibung"='Aufladung MyCard' WHERE "ID"=990
+DELETE FROM "Transaktionen" WHERE "ID"=999
+UPDATE "Transaktionen_Tilman" SET "Kategorie"=19 WHERE "ID"=15
+
+
+screen -S Transaktionen sudo -u nobody java -Duser.timezone=Europe/Berlin -cp hsqldb-1.8.0.10.jar org.hsqldb.Server -database.0 file:db -dbname.0 transaktionen
+
+
+CREATE CACHED TABLE "Kategorien_Tilman"("ID" INTEGER GENERATED BY DEFAULT AS IDENTITY(START WITH 0) NOT NULL PRIMARY KEY,"Name" VARCHAR(255) NOT NULL);
+CREATE CACHED TABLE "Transaktionen_Tilman"("ID" INTEGER GENERATED BY DEFAULT AS IDENTITY(START WITH 0) NOT NULL PRIMARY KEY,"Datum" DATE NOT NULL,"Kategorie" INTEGER NOT NULL,"Betrag" DECIMAL(50,2) NOT NULL,"Beschreibung" VARCHAR(255));
+
+ALTER TABLE "Transaktionen" ADD "Auslage" INTEGER DEFAULT 0 NOT NULL;
+INSERT INTO "Kategorien_Tilman" VALUES (null, 'Freizeit - Sport')
@@ -0,0 +1,18 @@
+#HSQL Database Engine 1.8.0.10
+#Thu Dec 22 13:18:48 CET 2011
+hsqldb.script_format=0
+runtime.gc_interval=0
+sql.enforce_strict_size=true
+hsqldb.cache_size_scale=8
+readonly=false
+hsqldb.nio_data_file=false
+hsqldb.cache_scale=13
+version=1.8.0
+hsqldb.default_table_type=cached
+hsqldb.cache_file_scale=1
+hsqldb.lock_file=true
+hsqldb.log_size=10
+modified=yes
+hsqldb.cache_version=1.7.0
+hsqldb.original_version=1.8.0
+hsqldb.compatible_version=1.8.0
@@ -0,0 +1,17 @@
+SET DATABASE COLLATION "German"
+CREATE SCHEMA PUBLIC AUTHORIZATION DBA
+CREATE CACHED TABLE "Kategorien"("ID" INTEGER GENERATED BY DEFAULT AS IDENTITY(START WITH 0) NOT NULL PRIMARY KEY,"Name" VARCHAR(255) NOT NULL)
+CREATE CACHED TABLE "Transaktionen"("ID" INTEGER GENERATED BY DEFAULT AS IDENTITY(START WITH 0) NOT NULL PRIMARY KEY,"Datum" DATE NOT NULL,"Kategorie" INTEGER NOT NULL,"Betrag" DECIMAL(50,2) NOT NULL,"Beschreibung" VARCHAR(255),"Auslage" INTEGER DEFAULT 0 NOT NULL)
+CREATE CACHED TABLE "Kategorien_Tilman"("ID" INTEGER GENERATED BY DEFAULT AS IDENTITY(START WITH 0) NOT NULL PRIMARY KEY,"Name" VARCHAR(255) NOT NULL)
+CREATE CACHED TABLE "Transaktionen_Tilman"("ID" INTEGER GENERATED BY DEFAULT AS IDENTITY(START WITH 0) NOT NULL PRIMARY KEY,"Datum" DATE NOT NULL,"Kategorie" INTEGER NOT NULL,"Betrag" DECIMAL(50,2) NOT NULL,"Beschreibung" VARCHAR(255),"Auslage" INTEGER DEFAULT 0 NOT NULL)
+SET TABLE "Kategorien" INDEX'108664 37'
+SET TABLE "Transaktionen" INDEX'128352 763'
+SET TABLE "Kategorien_Tilman" INDEX'163952 2'
+SET TABLE "Transaktionen_Tilman" INDEX'164120 3'
+ALTER TABLE "Kategorien" ALTER COLUMN "ID" RESTART WITH 37
+ALTER TABLE "Transaktionen" ALTER COLUMN "ID" RESTART WITH 763
+ALTER TABLE "Kategorien_Tilman" ALTER COLUMN "ID" RESTART WITH 2
+ALTER TABLE "Transaktionen_Tilman" ALTER COLUMN "ID" RESTART WITH 3
+CREATE USER SA PASSWORD ""
+GRANT DBA TO SA
+SET WRITE_DELAY 60
@@ -0,0 +1,56 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>Transaktionen</groupId>
+  <artifactId>Transaktionen</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  <build>
+  	<plugins>
+  		<plugin>
+  			<groupId>org.mortbay.jetty</groupId>
+  			<artifactId>jetty-maven-plugin</artifactId>
+  			<version>8.0.1.v20110908</version>
+  		</plugin>
+  		<plugin>
+  			<groupId>org.codehaus.mojo</groupId>
+  			<artifactId>exec-maven-plugin</artifactId>
+  			<version>1.2</version>
+  			<executions>
+  				<execution><goals><goal>java</goal></goals></execution>
+  			</executions>
+  			<configuration>
+  				<mainClass>org.example.HelloWorld</mainClass>
+  			</configuration>
+  		</plugin>
+  	</plugins>
+  </build>
+  <dependencies>
+    <dependency>
+    	<groupId>log4j</groupId>
+    	<artifactId>log4j</artifactId>
+    	<version>1.2.14</version>
+    	<type>jar</type>
+    	<scope>compile</scope>
+    </dependency>
+    <dependency>
+    	<groupId>org.mortbay.jetty</groupId>
+    	<artifactId>jetty-embedded</artifactId>
+    	<version>6.1.26</version>
+    	<type>jar</type>
+    	<scope>compile</scope>
+    </dependency>
+    <dependency>
+    	<groupId>hsqldb</groupId>
+    	<artifactId>hsqldb</artifactId>
+    	<version>1.8.0.10</version>
+    	<type>jar</type>
+    	<scope>compile</scope>
+    </dependency>
+    <dependency>
+    	<groupId>org.apache.commons</groupId>
+    	<artifactId>commons-lang3</artifactId>
+    	<version>3.0.1</version>
+    	<type>jar</type>
+    	<scope>compile</scope>
+    </dependency>
+  </dependencies>
+</project>
@@ -0,0 +1,129 @@
+package de.tilman.transactions;
+
+import java.math.BigDecimal;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.LinkedList;
+import java.util.Map;
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+import org.apache.log4j.Logger;
+
+public class DatabaseController {
+	
+	private final static Logger log = Logger.getLogger(DatabaseController.class);
+	
+	final String DB_TREIBER = "org.hsqldb.jdbcDriver";
+//	final String DB_URL = "jdbc:hsqldb:file:database/db;ifexists=true;shutdown=true"; // embedded mode, für Testzwecke
+	final String DB_URL = "jdbc:hsqldb:hsql://localhost/transaktionen"; // Datenbank läuft separat im server mode
+	final String DB_LOGIN = "sa";
+	final String DB_PASSWORT = "";
+	
+	String tblTransactions = "Transaktionen";
+	String tblCategories = "Kategorien";
+
+	Connection connection;
+	Statement statement;
+	PreparedStatement selectCategoriesSql;
+	PreparedStatement insertTransactionSql;
+	PreparedStatement getLastIdSql;
+	ResultSet resultSet;
+	
+	String path;
+	boolean hasAuslagen;
+
+	public DatabaseController(String tblTransactions, String tblCategories, String path, boolean hasAuslagen) throws Exception {
+		
+		this.tblTransactions = tblTransactions;
+		this.tblCategories = tblCategories;
+		this.path = path;		
+		this.hasAuslagen = hasAuslagen;
+		
+		Class.forName("org.hsqldb.jdbcDriver");
+		
+		connection = DriverManager.getConnection(DB_URL, DB_LOGIN, DB_PASSWORT);
+		statement = connection.createStatement();
+
+		// prepare SQL statements
+		selectCategoriesSql = connection.prepareCall("SELECT * FROM \""+tblCategories+"\" ORDER BY \"ID\" asc");
+		insertTransactionSql = connection.prepareCall("INSERT INTO \""+tblTransactions+"\" (\"ID\", \"Datum\", \"Kategorie\", \"Betrag\", \"Beschreibung\", \"Auslage\") VALUES (null,?,?,?,?,?)");
+	}
+
+	public SortedMap<Integer, String> getCategories() throws SQLException {
+		resultSet = selectCategoriesSql.executeQuery();
+		TreeMap<Integer, String> categoryMap = new TreeMap<Integer, String>();
+		while (resultSet.next()) {
+			categoryMap.put(resultSet.getInt(1), resultSet.getString(2));
+		}
+		return categoryMap;
+	}
+	
+	public int writeTransaction(Transaktion transaction) throws SQLException {
+		insertTransactionSql.setBigDecimal(3, transaction.betrag);
+		insertTransactionSql.setInt(2, transaction.kategorie);
+		insertTransactionSql.setDate(1, new java.sql.Date(transaction.datum.getTime()));
+		insertTransactionSql.setString(4, transaction.beschreibung);
+		insertTransactionSql.setInt(5, transaction.auslage);
+		insertTransactionSql.execute();
+		
+		// return the ID of the new row
+		resultSet = statement.executeQuery("CALL IDENTITY();");
+		resultSet.next();
+		int lastId = resultSet.getInt(1);
+		log.info("written transaction with ID " + lastId);
+		return lastId;
+	}
+	
+	public void deleteTransaction(int id) throws SQLException {
+		log.info("delete transaction #" + id);
+		statement.execute("DELETE FROM \""+tblTransactions+"\" WHERE id=" + id);
+	}
+	
+	public Transaktion getLastTransaction() throws SQLException  {
+		resultSet = statement.executeQuery("SELECT \"ID\", \"Datum\", \"Kategorie\", \"Betrag\", \"Beschreibung\", \"Auslage\" FROM \""+tblTransactions+"\" WHERE id = (SELECT Max(id) FROM \""+tblTransactions+"\");");
+		resultSet.next();
+		return new Transaktion(resultSet.getInt(1), resultSet.getBigDecimal(4), resultSet.getInt(3), resultSet.getDate(2), resultSet.getString(5), resultSet.getInt(6));
+	}
+	
+	public LinkedList<Transaktion> getLastTransactions(int num) throws SQLException {
+		LinkedList<Transaktion> list = new LinkedList<Transaktion>();
+		Map<Integer, String> categories = getCategories();
+		resultSet = statement.executeQuery("SELECT \"ID\", \"Datum\", \"Kategorie\", \"Betrag\", \"Beschreibung\", \"Auslage\" FROM \""+tblTransactions+"\" ORDER BY \"Datum\" desc, \"ID\" desc LIMIT " + num);
+		while (resultSet.next()) {
+			Transaktion trns = new Transaktion(resultSet.getInt(1), resultSet.getBigDecimal(4), resultSet.getInt(3), categories.get(resultSet.getInt(3)), resultSet.getDate(2), resultSet.getString(5), resultSet.getInt(6));
+			list.push(trns);
+		}
+		return list;
+	}
+	
+	public BigDecimal getSumExpenses(int id) throws SQLException {
+		resultSet = statement.executeQuery("SELECT SUM(\"Betrag\") FROM \"" + tblTransactions + "\" WHERE \"Auslage\"=" + id);
+		resultSet.next();
+		BigDecimal result = resultSet.getBigDecimal(1);
+		if (result == null)
+			return new BigDecimal(0);
+		return result;
+	}
+	
+	public void resetExpenses(int id) throws SQLException {
+		log.info("resetting expenses for ID " + id);
+		statement.execute("UPDATE \"Transaktionen\" SET \"Auslage\"=0 WHERE \"Auslage\"=" + id);
+	}
+	
+	public void close() throws SQLException {
+		selectCategoriesSql.close();
+		insertTransactionSql.close();
+		
+		log.info("shutting down database");
+		statement.execute("SHUTDOWN COMPACT");
+		statement.close();
+		
+		connection.close();
+		log.info("database closed");
+	}
+}
@@ -0,0 +1,398 @@
+package de.tilman.transactions;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.math.BigDecimal;
+import java.sql.SQLException;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.SortedMap;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.lang3.StringEscapeUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.log4j.BasicConfigurator;
+import org.apache.log4j.ConsoleAppender;
+import org.apache.log4j.Logger;
+import org.apache.log4j.PatternLayout;
+import org.mortbay.jetty.Handler;
+import org.mortbay.jetty.Server;
+import org.mortbay.jetty.handler.DefaultHandler;
+import org.mortbay.jetty.handler.HandlerList;
+import org.mortbay.jetty.handler.ResourceHandler;
+import org.mortbay.jetty.servlet.Context;
+import org.mortbay.jetty.servlet.ServletHolder;
+import org.mortbay.thread.QueuedThreadPool;
+
+public class Service {
+
+	private final static Logger log = Logger.getLogger(Service.class);
+	private static int hostPort = 8080;
+
+	protected Server jetty;
+	
+	private static SimpleDateFormat formatter = new SimpleDateFormat("dd.MM.yyyy");
+	
+	private Random rnd = new Random();
+
+	public void start() {
+		BasicConfigurator.configure(new ConsoleAppender(new PatternLayout("%d{ISO8601} - %m%n")));
+		
+		try {
+			log.info("open database");
+			DatabaseController database = new DatabaseController("Transaktionen", "Kategorien", "/input", true);
+			log.info("add shutdown hook for database");
+			Runtime.getRuntime().addShutdownHook(new ShutdownThread(database));
+			
+			DatabaseController databaseTilman = new DatabaseController("Transaktionen_Tilman", "Kategorien_Tilman", "/tilman", false);
+			
+			jetty = new Server(hostPort);
+			jetty.setThreadPool(new QueuedThreadPool(10));
+			
+			Context inputContext = new Context(jetty, "/", Context.SESSIONS);
+			inputContext.addServlet(new ServletHolder(new ReadServlet(database)), "/input");
+			inputContext.addServlet(new ServletHolder(new StatsServlet(database)), "/input/last");
+			inputContext.addServlet(new ServletHolder(new CsvServlet(database)), "/input/csv");
+			
+			inputContext.addServlet(new ServletHolder(new ReadServlet(databaseTilman)), "/tilman");
+			inputContext.addServlet(new ServletHolder(new StatsServlet(databaseTilman)), "/tilman/last");
+			inputContext.addServlet(new ServletHolder(new CsvServlet(databaseTilman)), "/tilman/csv");
+			
+
+			ResourceHandler resourceHandler = new ResourceHandler();
+	        resourceHandler.setResourceBase("resources");
+	        
+	        log.info("serving " + resourceHandler.getBaseResource());
+	        HandlerList handlers = new HandlerList();
+	        handlers.setHandlers(new Handler[] { resourceHandler, inputContext, new DefaultHandler() });
+	        jetty.setHandler(handlers);
+	        
+			jetty.start();
+			jetty.join();
+			log.info("Listening at " + hostPort);
+		} catch (Exception e) {
+			e.printStackTrace();
+			log.fatal("Failed to start on port " + hostPort + ", reason: " + e.getMessage());
+		}
+	}
+	
+	protected static void writeHeader(PrintWriter out) {
+        out.println("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n" +
+        		"<html xmlns='http://www.w3.org/1999/xhtml'>" +
+        		"<head><title>Ausgaben</title>" +
+        		"<meta http-equiv=\"content-type\" " +
+        		"content=\"text/html; charset=utf-8\" />");
+        out.println("<meta name='viewport' content='width=360'/>");
+        out.println("<meta name='apple-mobile-web-app-capable' content='yes' />");
+        out.println("<link rel='apple-touch-icon' href='/icon.png'/>");
+        out.println("<style type='text/css'>\na:link { color:darkred; }\na:visited { color:darkred; }\n</style>");
+        out.println("</head><body style='font-family:Arial;sans-serif;'>"); // onload='document.forms[0].betrag.focus()' 
+	}
+	
+	protected static void writeFooter(PrintWriter out) {
+        out.println("</body></html>");
+        out.close();
+	}
+	
+	protected static void showTable(DatabaseController database, int num, PrintWriter out) throws ServletException {
+		out.println("<table border='1' cellpadding='3' style='margin:auto; margin-top: 2em; font-size: 80%; border-collapse:collapse;'>");
+        out.println("<tr><th>Datum</th><th>Kategorie</th><th>Betrag</th><th>Beschreibung</th></tr>");
+        
+        
+        LinkedList<Transaktion> transactions = null;
+        try {
+			transactions = database.getLastTransactions(num);
+		} catch (SQLException se) {
+			throw new ServletException(se);
+		}
+        
+		while (!transactions.isEmpty()) {
+			Transaktion t = transactions.removeLast();
+			out.println("<tr><td>" + formatter.format(t.datum) + "</td><td>" + StringEscapeUtils.escapeHtml4(t.kategorieName) + "</td><td align=\"right\" " + ((t.auslage > 0) ? "style=\"background-color: #ccddff;\">" : ">") + t.betrag.toPlainString() + "&nbsp;€</td><td>" + ((t.beschreibung == null) ? "" : StringEscapeUtils.escapeHtml4(t.beschreibung))  + "</td></tr>");
+		}
+        
+		out.println("</table>");
+		
+	}
+	
+
+	public class ReadServlet extends HttpServlet {
+		private static final long serialVersionUID = 1572581546682459768L;
+		
+		private int undoChallenge = -1;
+		private int auslagenChallenge = -1; 
+		private int lastId = -1;
+		private DatabaseController database;
+		
+		public ReadServlet(DatabaseController database) {
+			super();
+			this.database = database;
+		}
+
+		protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+			response.setContentType("text/html;charset=utf-8");
+			response.setStatus(HttpServletResponse.SC_OK);
+			PrintWriter out = response.getWriter();
+
+			writeHeader(out);
+
+			if (request.getParameter("chl") != null) {
+				if ((undoChallenge == Integer.parseInt(request.getParameter("chl"))) && (lastId == Integer.parseInt(request.getParameter("del")))) {
+					try {
+						database.deleteTransaction(lastId);
+					} catch (SQLException se) {
+						throw new ServletException(se);
+					}
+					showMessage(out, "Transaktion gelöscht.");
+				}
+				else if (auslagenChallenge == Integer.parseInt(request.getParameter("chl"))) {
+					try {
+						database.resetExpenses(Integer.parseInt(request.getParameter("id")));
+					} catch (SQLException se) {
+						throw new ServletException(se);
+					}
+					showMessage(out, "Auslagen zurückgesetzt.");
+				}
+				undoChallenge = -1;
+				auslagenChallenge = -1;
+			}
+
+			showInputForm(out);
+			showTable(database, 10, out);
+			showAuslagen(out);
+			writeFooter(out);
+		}
+
+		protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+	        response.setContentType("text/html;charset=utf-8");
+	        
+	        boolean error = false;
+	        String errorMessage = null;
+	        
+	        // der Betrag kann mit Punkt oder Komma als Dezimalzeichen eingegeben werden
+	        String betragStr = StringUtils.replaceChars(request.getParameter("betrag"), ',', '.');
+	        
+	        // wenn kein Vorzeichen angegeben wurde, nehmen wir eine Ausgabe an
+	        // und setzen den Betrag negativ
+	        if (!(betragStr.startsWith("-") || betragStr.startsWith("+"))) {
+	        	betragStr = "-" + betragStr;
+	        }
+	        
+	        BigDecimal betrag = null;
+	        try {
+	        	betrag = new BigDecimal(betragStr);
+	        	if (betrag.compareTo(BigDecimal.valueOf(0)) == 0)
+	        		error = true;
+	        }
+	        catch (NumberFormatException nfe) {
+	        	error = true;
+	        }
+	        
+	        if (error)
+	        	errorMessage =  "<span style='color: red;'>Fehler: </span> &quot;" + request.getParameter("betrag") + "&quot; ist kein zulässiger Betrag.";
+
+	        Date datum = null;
+	        try {
+				datum = formatter.parse(request.getParameter("datum"));
+			} catch (ParseException pe) {
+				error = true;
+				errorMessage =  "<span style='color: red;'>Fehler:</span> &quot;" + request.getParameter("datum") + "&quot; ist kein zulässiges Datum.";
+			}
+			
+			if (!error) {
+				Transaktion transaction = new Transaktion(betrag, Integer.parseInt(request.getParameter("kategorie")), datum, request.getParameter("beschreibung"), (database.hasAuslagen ? Integer.parseInt(request.getParameter("auslage")) : 0));
+				try {
+					lastId = database.writeTransaction(transaction);
+				} catch (SQLException se) {
+					throw new ServletException(se);
+				}
+			}
+			
+	        response.setStatus(HttpServletResponse.SC_OK);
+	        PrintWriter out = response.getWriter();
+	        
+	        writeHeader(out);
+	        if (!error)
+	        	showLastTransaction(out);
+	        else
+	        	showMessage(out, errorMessage);
+	        showInputForm(out);
+	        showTable(database, 10, out);
+			showAuslagen(out);
+	        writeFooter(out);
+		}
+		
+		private void showInputForm(PrintWriter out) throws ServletException {
+	        
+			SortedMap<Integer, String> categories;
+			try {
+				categories = database.getCategories();
+			} catch (SQLException e) {
+				throw new ServletException(e);
+			}
+	        
+			out.println("<form action='" + database.path + "' method='post' style='text-align: center;'><table border='0' cellpadding='1' style='margin:auto;'>");
+	        
+			out.println("<tr><td align='right'>Betrag:</td><td align='left'><input name='betrag' type='text' size='10' maxlength='10' style='font-size:100%' /></td></tr>");
+			out.println("<tr><td align='right'>Kategorie:</td><td align='left'><select name='kategorie' size='1' style='width: 23ex; font-size:100%'>");
+	        for (Map.Entry<Integer, String> category : categories.entrySet()) {
+	        	if (category.getKey() == 4) {
+	        		out.println("<option selected='selected' value='" + category.getKey() + "'>" + StringEscapeUtils.escapeHtml4(category.getValue()) + "</option>");
+	        	}
+	        	else {
+	        		out.println("<option value='" + category.getKey() + "'>" + StringEscapeUtils.escapeHtml4(category.getValue()) + "</option>");
+	        	}
+	        }
+	        out.println("</select></td></tr>");
+	        out.println("<tr><td align='right'>Datum:</td><td align='left'><input name='datum' type='text' size='10' maxlength='10' value='" + formatter.format(new Date()) + "' style='font-size:100%' /></td></tr>");
+	        out.println("<tr><td align='right'>Notiz:</td><td align='left'><input name='beschreibung' type='text' size='25' maxlength='255' style='font-size:100%' /></td></tr>");
+	        
+	        if (database.hasAuslagen)
+	        	out.println("<tr><td align='right'>Auslage:</td><td align='left'><input name='auslage' type='radio' value='0' checked='checked' />&nbsp;Keine&nbsp;&nbsp;&nbsp;<input name='auslage' type='radio' value='1' />&nbsp;Tilman&nbsp;&nbsp;&nbsp;<input name='auslage' type='radio' value='2' />&nbsp;Anica</td></tr>");
+	        
+	        out.println("<tr><td align='center' colspan='2'><input type='submit' value='Absenden' /></td></tr></table>");
+	        
+	        out.println("</form>");
+		}
+		
+		private void showAuslagen(PrintWriter out) throws ServletException {
+			if (database.hasAuslagen) {
+				auslagenChallenge = rnd.nextInt(Integer.MAX_VALUE);
+
+				out.println("<table border='0' cellpadding='3' style='margin:auto; margin-top: 2em; font-size: 80%; border-collapse:collapse;'>");
+				try {
+					out.println("<tr><td>Auslagen Anica </td><td align=\"right\">" + database.getSumExpenses(2) + "&nbsp;€</td><td><span style='color: red; font-weight: bold;'><a href='" + database.path + "?id=2&chl=" + auslagenChallenge + "'>überwiesen</a></span></td>");
+					out.println("<tr><td>Auslagen Tilman </td><td align=\"right\">" + database.getSumExpenses(1) + "&nbsp;€</td><td><span style='color: red; font-weight: bold;'><a href='" + database.path + "?id=1&chl=" + auslagenChallenge + "'>überwiesen</a></span></td>");
+				} catch (SQLException se) {
+					throw new ServletException(se);
+				}
+				out.println("</table>");
+			}
+		}
+		
+		private void showLastTransaction(PrintWriter out) throws ServletException {
+			Transaktion trns = null;
+			try {
+				trns = database.getLastTransaction();
+			} catch (SQLException e) {
+				throw new ServletException(e);
+			}
+			out.println("<div style='text-align: center; font-size: 80%; font-weight: bold; padding: 0.5ex; background-color: lightgray; width: 25em; margin:auto; margin-bottom: 3em;'>");
+			out.println("gespeichert: ");
+			out.print(trns.datum + " ");
+			if (trns.betrag.compareTo(BigDecimal.valueOf(0)) < 0) {
+				out.print("<span style='color: red;'>");
+			}
+			else {
+				out.print("<span style='color: green;'>");
+			}
+			out.println(trns.betrag.toPlainString() + "&nbsp;€</span>");
+			
+			undoChallenge = rnd.nextInt(Integer.MAX_VALUE);
+			
+			out.println("&nbsp;&nbsp;&nbsp;<span style='color: red; font-weight: bold;'><a href='" + database.path + "?del=" + trns.id + "&chl=" + undoChallenge + "'>löschen</a></span>");
+			out.println("</div>");
+		}
+		
+		private void showMessage(PrintWriter out, String message) {
+			out.println("<div style='text-align: center; font-weight: bold; padding: 0.5ex; border: 2px dotted red; background-color: lightgray; width: 25em; margin:auto; margin-bottom: 3em;'>");
+			out.println(message);
+			out.println("</div>");
+		}
+	}
+	
+	public class StatsServlet extends HttpServlet {
+		private static final long serialVersionUID = 4104919572342151480L;
+		private DatabaseController database;
+		
+		public StatsServlet(DatabaseController database) {
+			super();
+			this.database = database;
+		}
+
+		protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+	        response.setContentType("text/html;charset=utf-8");
+	        response.setStatus(HttpServletResponse.SC_OK);
+	        PrintWriter out = response.getWriter();
+	        
+	        writeHeader(out);
+	        showTable(database, ((request.getParameter("n") != null) ? Integer.parseInt(request.getParameter("n")) : 20), out);
+	        writeFooter(out);
+		}
+	}
+	
+	public class CsvServlet extends HttpServlet {
+		private static final long serialVersionUID = 4104919572342151480L;
+		private DatabaseController database;
+		
+		public CsvServlet(DatabaseController database) {
+			super();
+			this.database = database;
+		}
+
+		protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+			
+			char separator = ';';
+			
+			if (request.getParameter("separator") != null) {
+				separator = request.getParameter("separator").charAt(0);
+			}
+			
+	        response.setContentType("text/html;charset=utf-8");
+	        response.setStatus(HttpServletResponse.SC_OK);
+	        PrintWriter out = response.getWriter();
+			
+	        writeHeader(out);
+	        
+			out.println("<pre>");
+			out.println("ID" + separator + "Datum" + separator + "Kategorie" + separator + "Betrag" + separator + "Beschreibung");	        
+	        
+	        List<Transaktion> transactions = null;
+	        try {
+				transactions = database.getLastTransactions(((request.getParameter("n") != null) ? Integer.parseInt(request.getParameter("n")) : 50));
+			} catch (SQLException se) {
+				throw new ServletException(se);
+			}
+	        
+			for (Transaktion t : transactions) {
+				String s = "" + t.id + separator + formatter.format(t.datum) + separator + StringEscapeUtils.escapeHtml4(t.kategorieName) + separator + t.betrag.toPlainString() + separator + ((t.beschreibung == null) ? "" : StringEscapeUtils.escapeHtml4(t.beschreibung));
+				System.out.println(s);
+				out.println(s);
+			}
+	        
+			out.println("</pre>");
+			
+	        writeFooter(out);
+		}
+	}
+	
+	class ShutdownThread extends Thread {
+		DatabaseController database;
+		
+		public ShutdownThread(DatabaseController database) {
+			this.database = database;
+		}
+		
+		public void run() {
+			try {
+				database.close();
+			} catch (SQLException se) {
+				log.error(se);
+			}
+		}
+	}
+	
+	public static void main(String[] args) {
+		Service service = new Service();
+		service.start();
+	}
+}
@@ -0,0 +1,32 @@
+package de.tilman.transactions;
+
+import java.math.BigDecimal;
+import java.util.Date;
+
+public class Transaktion {
+	public int id;
+	public BigDecimal betrag;
+	public int kategorie;
+	public String kategorieName;
+	public Date datum;
+	public String beschreibung;
+	public int auslage;
+	
+	public Transaktion(int id, BigDecimal betrag, int kategorie, Date datum, String beschreibung, int auslage) {
+		this.id = id;
+		this.betrag = betrag;
+		this.kategorie = kategorie;
+		this.datum = datum;
+		this.beschreibung = beschreibung;
+		this.auslage = auslage;
+	}
+	
+	public Transaktion(int id, BigDecimal betrag, int kategorie, String kategorieName, Date datum, String beschreibung, int auslage) {
+		this(id, betrag, kategorie, datum, beschreibung, auslage);
+		this.kategorieName = kategorieName;
+	}
+	
+	public Transaktion(BigDecimal betrag, int kategorie, Date datum, String beschreibung, int auslage) {
+		this(-1, betrag, kategorie, datum, beschreibung, auslage);
+	}
+}
@@ -0,0 +1,18 @@
+package org.example;
+ 
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+ 
+public class HelloServlet extends HttpServlet
+{
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
+    {
+        response.setContentType("text/html");
+        response.setStatus(HttpServletResponse.SC_OK);
+        response.getWriter().println("<h1>Hello Servlet</h1>");
+        response.getWriter().println("session=" + request.getSession(true).getId());
+    }
+}
@@ -0,0 +1,32 @@
+package org.example;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.mortbay.jetty.HttpConnection;
+import org.mortbay.jetty.Request;
+import org.mortbay.jetty.Server;
+import org.mortbay.jetty.handler.AbstractHandler;
+
+public class HelloWorld extends AbstractHandler {
+
+	public void handle(String target, HttpServletRequest request, HttpServletResponse response, int dispatch) throws IOException,
+			ServletException {
+		response.setContentType("text/html;charset=utf-8");
+		response.setStatus(HttpServletResponse.SC_OK);
+		response.getWriter().println("<pre>Aloha,\nfunky time</pre>");
+		Request base_request = (request instanceof Request) ? (Request)request:HttpConnection.getCurrentConnection().getRequest();
+		base_request.setHandled(true);
+	}
+
+	public static void main(String[] args) throws Exception {
+		Server server = new Server(8080);
+		server.setHandler(new HelloWorld());
+
+		server.start();
+		server.join();
+	}
+}
@@ -0,0 +1,2 @@
+<h1>Hello World Webapp</h1>
+<a href="/hello">Hello Servlet</a>
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<web-app 
+   xmlns="http://java.sun.com/xml/ns/javaee" 
+   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
+   version="2.5">
+  <servlet>
+    <servlet-name>Hello</servlet-name>
+    <servlet-class>org.example.HelloServlet</servlet-class>
+  </servlet>
+  <servlet-mapping>
+    <servlet-name>Hello</servlet-name>
+    <url-pattern>/hello/*</url-pattern>
+  </servlet-mapping>
+</web-app>