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added missing features and improved the Errorhandling
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Tobin Rosenau committed Dec 13, 2017
1 parent 8a806b1 commit d3fa00b
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1 change: 1 addition & 0 deletions .classpath
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Expand Up @@ -3,5 +3,6 @@
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="lib" path="sqlite-jdbc-3.21.0.jar"/>
<classpathentry kind="lib" path="json.jar"/>
<classpathentry kind="output" path="bin"/>
</classpath>
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225 changes: 140 additions & 85 deletions src/Database.java
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@@ -1,13 +1,12 @@
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.sql.*;

/**
* @author Tobin Rosenau
*
*/
public class Database {
public Database() {

public Database() throws FileNotFoundException, UnsupportedEncodingException {
File db = new File("telefonbuch.db");
if (!db.exists()) {
try {
Expand All @@ -19,45 +18,50 @@ public Database() {
}
}

public String createTable() {
public void createTable() {
Connection c = null;
Statement stmt = null;
try {
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:telefonbuch.db");
System.out.println("Opened database successfully");
System.out.println("Datenbank erfolgreich geöffnet");

stmt = c.createStatement();
String sql = "CREATE TABLE `Telefonbuch` (" + " `id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,"
+ " `Vorname` TEXT," + " `Nachname` TEXT," + " `Stra�e` TEXT," + " `Hausnummer` TEXT,"
+ " `Postleitzahl` TEXT," + " `Ort` INTEGER," + " `Telefonnummer` TEXT,"
+ " `Faxnummer` TEXT," + " `Handynummer` TEXT" + " `Emailadresse` TEXT" + ");";
String sql = "CREATE TABLE Telefonbuch (" + " `id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,"
+ " `Vorname` TEXT," + " `Nachname` TEXT," + " `Straße` TEXT," + " `Hausnummer` TEXT,"
+ " `Postleitzahl` TEXT," + " `Ort` TEXT," + " `Telefonnummer` TEXT," + " `Faxnummer` TEXT,"
+ " `Handynummer` TEXT," + " `Emailadresse` TEXT" + ");";
stmt.executeUpdate(sql);
stmt.close();
c.close();
} catch (Exception e) {
//System.err.println(e.getClass().getName() + ": " + e.getMessage());
return "Operation failed";
//System.exit(0);
System.out.println("Datenbank erstellen Fehlgeschlagen");
System.err.println(e.getClass().getName() + ": " + e.getMessage());
}
//System.out.println("Operation done successfully");
return "Operation done successfully";
System.out.println("Datenbank erfolgreich erstellt");
}

public String readTabe() {
public String readTable() {
Connection c = null;
Statement stmt = null;
StringBuilder sb = new StringBuilder();
try {
//Connect to the Database
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:test.db");
c = DriverManager.getConnection("jdbc:sqlite:telefonbuch.db");
c.setAutoCommit(false);
System.out.println("Opened database successfully");

System.out.println("Datenbank erfolgreich geöffnet");
stmt = c.createStatement();
//Read the complete Database
ResultSet rs = stmt.executeQuery("SELECT * FROM Telefonbuch;");

//Create an JSONmultidimensionalArray Formatted StringBuilder
sb.append("[");
int i = 0;
while (rs.next()) {
if(i == 1) {
sb.append(",");
}
i++;
int id = rs.getInt("id");
String vorname = rs.getString("Vorname");
String nachname = rs.getString("Nachname");
Expand All @@ -68,37 +72,40 @@ public String readTabe() {
String telefonnummer = rs.getString("Telefonnummer");
String faxnummer = rs.getString("Faxnummer");
String handynummer = rs.getString("handynummer");
String email = rs.getString("Emailaddresse");

sb.append("ID: " + id);
sb.append("\n");
sb.append("Vorname: " + vorname);
sb.append("\n");
sb.append("Nachname: " + nachname);
sb.append("\n");
sb.append("Starße, Hausnummer: " + straße + ", " + hausnummer);
sb.append("\n");
sb.append("Plz, Ort: " + postleitzahl + ", " + ort);
sb.append("\n");
sb.append("Telefonnummer: " + telefonnummer);
sb.append("\n");
sb.append("Faxnummer: " + faxnummer);
sb.append("\n");
sb.append("Handynummer: " + handynummer);
sb.append("\n");
sb.append("Emailadresse: " + email);
sb.append("\n");
String email = rs.getString("Emailadresse");

sb.append("{\"id\": \"" + id + "\",");

sb.append("\"Vorname\": \"" + vorname + "\",");

sb.append("\"Nachname\": \"" + nachname + "\",");

sb.append("\"Straße\": \"" + straße + "\",");

sb.append("\"Hausnummer\":\"" + hausnummer + "\",");

sb.append("\"Plz\": \"" + postleitzahl + "\",");

sb.append("\"Ort\": \"" + ort + "\",");

sb.append("\"Telefonnummer\": \"" + telefonnummer + "\",");

sb.append("\"Faxnummer\": \"" + faxnummer + "\",");

sb.append("\"Handynummer\": \"" + handynummer + "\",");

sb.append("\"Emailadresse\": \"" + email + "\"}");
}
sb.append("]");
//Disconnect form the Database
rs.close();
stmt.close();
c.close();
} catch (Exception e) {
//System.err.println(e.getClass().getName() + ": " + e.getMessage());
return "Operation failed";
//System.exit(0);
System.err.println(e.getClass().getName() + ": " + e.getMessage());
return "Aktion Fehlgeschlagen";
}
//System.out.println("Operation done successfully");
//Return the JsonString
return sb.toString();
}

Expand All @@ -107,43 +114,55 @@ public String deleteItem(int id) {
Statement stmt = null;

try {
//Connect to the Database
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:test.db");
c = DriverManager.getConnection("jdbc:sqlite:telefobuch.db");
c.setAutoCommit(false);
System.out.println("Opened database successfully");

System.out.println("Datenbank erfolgreich geöffnet");
//Run Delete Command
stmt = c.createStatement();
String sql = "DELETE from COMPANY where ID=" + id + ";";
stmt.executeUpdate(sql);
c.commit();

ResultSet rs = stmt.executeQuery("SELECT * FROM COMPANY;");
rs.close();
//Disconnect from the Database
stmt.close();
c.close();
} catch (Exception e) {
//System.err.println(e.getClass().getName() + ": " + e.getMessage());
return "Operation failed";
//System.exit(0);
//Return fail statement
System.err.println(e.getClass().getName() + ": " + e.getMessage());
return "Aktion Fehlgeschlagen";
}
//System.out.println("Operation done successfully");
return "Operation done successfully";
//Return ok statement
return "Aktion erfolgreich ausgeführt";

}

public String searchItem(String querry) {
Connection c = null;
Statement stmt = null;
StringBuilder sb = new StringBuilder();
try {
//Connect to the Database
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:test.db");
c = DriverManager.getConnection("jdbc:sqlite:telefonbuch.db");
c.setAutoCommit(false);
System.out.println("Opened database successfully");

System.out.println("Datenbank erfolgreich geöffnet");
//Run Search command
stmt = c.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM Telefonbuch WHERE Vorname LIKE '%"+querry+"%' OR WHERE Nachname LIKE '%"+querry+"%' OR WHERE Stra�e LIKE '%"+querry+"%' OR WHERE Hausnummer LIKE '%"+querry+"%' OR WHERE Postleitzahl LIKE '%"+querry+"%' OR WHERE Ort LIKE '%"+querry+"%' OR WHERE Telefonnummer LIKE '%"+querry+"%' OR WHERE Faxnummer LIKE '%"+querry+"%' OR WHERE Handynummer LIKE '%"+querry+"%' OR WHERE Emailadresse LIKE '%"+querry+"%';");
ResultSet rs = stmt.executeQuery(
"SELECT * FROM Telefonbuch WHERE Vorname LIKE '%" + querry + "%' OR Nachname LIKE '%" + querry
+ "%' OR Straße LIKE '%" + querry + "%' OR Hausnummer LIKE '%" + querry
+ "%' OR Postleitzahl LIKE '%" + querry + "%' OR Ort LIKE '%" + querry
+ "%' OR Telefonnummer LIKE '%" + querry + "%' OR Faxnummer LIKE '%" + querry
+ "%' OR Handynummer LIKE '%" + querry + "%' OR Emailadresse LIKE '%" + querry + "%';");
//Create an JsonmultidimensionalArray String
sb.append("[");
int i =0;
while (rs.next()) {
if(i == 1) {
sb.append(",");
}
i++;
int id = rs.getInt("id");
String vorname = rs.getString("Vorname");
String nachname = rs.getString("Nachname");
Expand All @@ -154,37 +173,73 @@ public String searchItem(String querry) {
String telefonnummer = rs.getString("Telefonnummer");
String faxnummer = rs.getString("Faxnummer");
String handynummer = rs.getString("handynummer");
String email = rs.getString("Emailaddresse");

sb.append("ID: " + id);
sb.append("\n");
sb.append("Vorname: " + vorname);
sb.append("\n");
sb.append("Nachname: " + nachname);
sb.append("\n");
sb.append("Starße, Hausnummer: " + straße + ", " + hausnummer);
sb.append("\n");
sb.append("Plz, Ort: " + postleitzahl + ", " + ort);
sb.append("\n");
sb.append("Telefonnummer: " + telefonnummer);
sb.append("\n");
sb.append("Faxnummer: " + faxnummer);
sb.append("\n");
sb.append("Handynummer: " + handynummer);
sb.append("\n");
sb.append("Emailadresse: " + email);
sb.append("\n");
String email = rs.getString("Emailadresse");

sb.append("{\"id\": \"" + id + "\",");

sb.append("\"Vorname\": \"" + vorname + "\",");

sb.append("\"Nachname\": \"" + nachname + "\",");

sb.append("\"Straße\": \"" + straße + "\",");

sb.append("\"Hausnummer\":\"" + hausnummer + "\",");

sb.append("\"Plz\": \"" + postleitzahl + "\",");

sb.append("\"Ort\": \"" + ort + "\",");

sb.append("\"Telefonnummer\": \"" + telefonnummer + "\",");

sb.append("\"Faxnummer\": \"" + faxnummer + "\",");

sb.append("\"Handynummer\": \"" + handynummer + "\",");

sb.append("\"Emailadresse\": \"" + email + "\"}");
}
sb.append("]");
//Disconnect from Database
rs.close();
stmt.close();
c.close();
} catch (Exception e) {
//System.err.println(e.getClass().getName() + ": " + e.getMessage());
return "Operation failed";
//System.exit(0);
//Return Fail statement
System.err.println(e.getClass().getName() + ": " + e.getMessage());
return "Aktion Fehlgeschlagen";
}
//System.out.println("Operation done successfully");
//Return Ok statement
return sb.toString();
}

public String createKontakt(String vorname, String nachname, String strasse, String hausnummer, String plz,
String ort, String telefonnummer, String faxnummer, String handynummer, String email) {
Connection c = null;
Statement stmt = null;

try {
//Connect to the Database
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:telefonbuch.db");
c.setAutoCommit(false);
System.out.println("Datenbank erfolgreich geöffnet");
//Create the Kontakt
stmt = c.createStatement();
String sql = "INSERT INTO Telefonbuch (Vorname, Nachname, Straße, Hausnummer, Postleitzahl, Ort, Telefonnummer, Faxnummer, Emailadresse) "
+ "VALUES ('" + vorname + "', '" + nachname + "', '" + strasse + "', '" + hausnummer + "', '" + plz
+ "', '" + ort + "', '" + telefonnummer + "', '" + faxnummer + "', '" + email + "');";
stmt.executeUpdate(sql);
//Disconnect from the Database
stmt.close();
c.commit();
c.close();
} catch (Exception e) {
//Return fail Statement
System.err.println(e.getClass().getName() + ": " + e.getMessage());
return "Fehler beim erstellen des Kontaktes";
}
//Return ok Statement
System.out.println("Kontakt erfolgreich erstellt");
return "Kontakt erfolgreich erstellt";
}

}
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