Datenbanken
This commit is contained in:
447
db/DBQueries.java
Normal file
447
db/DBQueries.java
Normal file
@ -0,0 +1,447 @@
|
||||
package edu.hsog.db;
|
||||
|
||||
import javax.swing.*;
|
||||
import java.lang.reflect.Type;
|
||||
import java.sql.*;
|
||||
import java.util.ArrayList;
|
||||
|
||||
public class DBQueries {
|
||||
|
||||
// Count ohne try-with-resource und mit statement
|
||||
public static int count() {
|
||||
|
||||
Connection con = Globals.getPoolConnection();
|
||||
Statement st = null;
|
||||
ResultSet rs = null;
|
||||
try {
|
||||
st = con.createStatement();
|
||||
String q = "select count(*)\n" +
|
||||
"from gadgets";
|
||||
rs = st.executeQuery(q);
|
||||
rs.next();
|
||||
return rs.getInt(1);
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
} finally {
|
||||
try {
|
||||
if (rs != null) rs.close();
|
||||
if (st != null) st.close();
|
||||
if (con != null) con.close();
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Count mit try-with-resource und mit statement
|
||||
/*
|
||||
public static int count() {
|
||||
String query = "SELECT COUNT(*) FROM gadgets";
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
Statement st = con.createStatement();
|
||||
ResultSet rs = st.executeQuery(query)) {
|
||||
|
||||
rs.next(); // Kein if, da COUNT(*) immer ein Ergebnis liefert
|
||||
return rs.getInt(1);
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Error while counting gadgets", e);
|
||||
}
|
||||
*/
|
||||
|
||||
// Count mit try-with-resource und mit prepared-statement
|
||||
/*
|
||||
public static int count() {
|
||||
String query = "SELECT COUNT(*) FROM gadgets";
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query);
|
||||
ResultSet rs = pst.executeQuery()) {
|
||||
|
||||
rs.next(); // Kein if, da COUNT(*) immer ein Ergebnis liefert
|
||||
return rs.getInt(1);
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Error while counting gadgets", e);
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
// Login mit try-with-resource und mit statement
|
||||
/*
|
||||
public static boolean login(String username, String password) {
|
||||
|
||||
Connection con = Globals.getPoolConnection();
|
||||
Statement st = null;
|
||||
ResultSet rs = null;
|
||||
try {
|
||||
st = con.createStatement();
|
||||
|
||||
String q = "select count(*)\n" +
|
||||
"from users\n" +
|
||||
"where email = '" + username + "' and passwd = '" + password + "'";
|
||||
rs = st.executeQuery(q);
|
||||
rs.next();
|
||||
int c = rs.getInt(1);
|
||||
return (c == 1);
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
} finally {
|
||||
try {
|
||||
if (rs != null) rs.close();
|
||||
if (st != null) st.close();
|
||||
if (con != null) con.close();
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
// Login mit try-with-resource und mit prepared-statement
|
||||
public static boolean login(String username, String password) {
|
||||
String query = "SELECT COUNT(*) FROM users WHERE email = ? AND passwd = ?";
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query)) {
|
||||
|
||||
// Parameter setzen
|
||||
pst.setString(1, username);
|
||||
pst.setString(2, password);
|
||||
|
||||
try (ResultSet rs = pst.executeQuery()) {
|
||||
rs.next(); // Kein if notwendig, COUNT(*) liefert immer eine Zeile
|
||||
int count = rs.getInt(1);
|
||||
return count == 1;
|
||||
}
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Error during login attempt", e);
|
||||
}
|
||||
}
|
||||
|
||||
public static ArrayList showAll() {
|
||||
String query = "SELECT * FROM gadgets";
|
||||
ArrayList icons = new ArrayList<Icon>();
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query)) {
|
||||
|
||||
// Parameter setzen
|
||||
// pst.setString(1, username);
|
||||
try (ResultSet rs = pst.executeQuery()) {
|
||||
while (rs.next()) {
|
||||
Icon i = Converter.blob2Icon(rs.getBlob("cover"));
|
||||
icons.add(i);
|
||||
}
|
||||
return icons;
|
||||
}
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Error during login attempt", e);
|
||||
}
|
||||
}
|
||||
|
||||
public static ImageIcon getImage(int z) {
|
||||
String query = "SELECT * from gadgets order by url asc";
|
||||
|
||||
ImageIcon imIcon;
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query)){
|
||||
ResultSet rs = pst.executeQuery();
|
||||
|
||||
for(int i = 0; i<z;i++) {
|
||||
rs.next();
|
||||
}
|
||||
Blob b = rs.getBlob("COVER");
|
||||
imIcon = Converter.blob2ImageIcon(b);
|
||||
|
||||
}catch (SQLException e) {
|
||||
throw new RuntimeException("Error while counting gadgets", e);
|
||||
}
|
||||
return imIcon;
|
||||
}
|
||||
|
||||
public static ImageIcon getImageByUrl(String partialUrl) {
|
||||
String query = "SELECT * FROM gadgets WHERE url LIKE ?";
|
||||
|
||||
ImageIcon imIcon = null;
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query)) {
|
||||
|
||||
pst.setString(1, "%" + partialUrl + "%"); // Teilstring-Suche
|
||||
ResultSet rs = pst.executeQuery();
|
||||
|
||||
if (rs.next()) {
|
||||
Blob b = rs.getBlob("COVER");
|
||||
imIcon = Converter.blob2ImageIcon(b);
|
||||
} else {
|
||||
System.out.println("Keine passende URL gefunden für: " + partialUrl);
|
||||
}
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Fehler beim Abrufen des Bildes für URL-Teil: " + partialUrl, e);
|
||||
}
|
||||
|
||||
return imIcon;
|
||||
}
|
||||
public static ImageIcon getImageByDesc(String desc) {
|
||||
String query = "SELECT * FROM gadgets WHERE DESCRIPTION = ?";
|
||||
|
||||
ImageIcon imIcon = null;
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query)) {
|
||||
|
||||
pst.setString(1, desc);
|
||||
ResultSet rs = pst.executeQuery();
|
||||
|
||||
if (rs.next()) {
|
||||
Blob b = rs.getBlob("COVER");
|
||||
imIcon = Converter.blob2ImageIcon(b);
|
||||
}
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Fehler beim Abrufen des Bildes für URL: " + desc, e);
|
||||
}
|
||||
|
||||
return imIcon;
|
||||
}
|
||||
|
||||
public static void insertImageUrlEmail(String url, String email) {
|
||||
String query = "insert into gadgets(url,email,cover)values(?,?,?)";
|
||||
Icon icon = Converter.generatePatternIcon();
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query)) {
|
||||
Blob coverBlob = Converter.icon2Blob(icon,con);
|
||||
// Parameter setzen
|
||||
pst.setString(1, url);
|
||||
pst.setString(2, email);
|
||||
pst.setBlob(3,coverBlob);
|
||||
|
||||
pst.executeQuery();
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Error during login attempt", e);
|
||||
}
|
||||
}
|
||||
|
||||
public static void updateItemLikeKeywords(String eingabe) {
|
||||
String query = "update gadgets g set g.cover = ? where keywords like ?";
|
||||
Icon icon = Converter.generatePatternIcon();
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query)) {
|
||||
|
||||
// Parameter setzen
|
||||
pst.setBlob(1,Converter.icon2Blob(icon,con));
|
||||
pst.setString(2, eingabe);
|
||||
|
||||
pst.executeUpdate();
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Error during login attempt", e);
|
||||
}
|
||||
}
|
||||
|
||||
public static ArrayList<Icon> iconListEmail(String username) {
|
||||
String query = "SELECT cover from gadgets where email = ?";
|
||||
Icon icon = Converter.generatePatternIcon();
|
||||
ArrayList<Icon>myList = new ArrayList<>();
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query)) {
|
||||
|
||||
pst.setString(1,username);
|
||||
ResultSet rs = pst.executeQuery();
|
||||
|
||||
while (rs.next()){
|
||||
|
||||
icon = Converter.blob2Icon(rs.getBlob("cover"));
|
||||
myList.add(icon);
|
||||
|
||||
}
|
||||
return myList;
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Error during login attempt", e);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
public static int searchGadgetsUrlIndex(String url) {
|
||||
|
||||
Connection con = Globals.getPoolConnection();
|
||||
Statement st = null;
|
||||
ResultSet rs = null;
|
||||
try {
|
||||
st = con.createStatement();
|
||||
String q = "SELECT * from gadgets";
|
||||
rs = st.executeQuery(q);
|
||||
int lineCounter = 1;
|
||||
String foundURL = null;
|
||||
|
||||
while (rs.next()){
|
||||
if(rs.getString(1).contains(url)){
|
||||
foundURL = url;
|
||||
break;
|
||||
}
|
||||
lineCounter ++;
|
||||
}
|
||||
if(foundURL != null){
|
||||
return lineCounter;
|
||||
}
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
} finally {
|
||||
try {
|
||||
if (rs != null) rs.close();
|
||||
if (st != null) st.close();
|
||||
if (con != null) con.close();
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
public static String zeilenSpalten(int z, int col) {
|
||||
String query = "select * from bewertung order by url asc";
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
Statement st = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
|
||||
ResultSet rs = st.executeQuery(query )) {
|
||||
|
||||
rs.next();
|
||||
// Parameter setzen
|
||||
rs.absolute(z);
|
||||
|
||||
if(col== 1){
|
||||
return rs.getString("email");
|
||||
}
|
||||
if(col== 2){
|
||||
return rs.getString("url");
|
||||
}
|
||||
if(col== 3){
|
||||
return rs.getString("bewertung");
|
||||
}
|
||||
if(col== 4){
|
||||
return rs.getString("kommentars");
|
||||
}
|
||||
} catch (SQLException ex) {
|
||||
throw new RuntimeException(ex);
|
||||
}
|
||||
|
||||
|
||||
return "..";
|
||||
}
|
||||
|
||||
|
||||
public static DTO emailPassword(String teil) {
|
||||
String query = "SELECT EMAIL,PASSWD FROM users WHERE email like ? ";
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
PreparedStatement pst = con.prepareStatement(query)) {
|
||||
|
||||
// Parameter setzen
|
||||
pst.setString(1,"%"+ teil+"%");
|
||||
|
||||
|
||||
ResultSet rs = pst.executeQuery();
|
||||
rs.next(); // Kein if notwendig, COUNT(*) liefert immer eine Zeile
|
||||
|
||||
String email = rs.getString("EMAIL");
|
||||
String passwd = rs.getString("PASSWD");
|
||||
|
||||
return new DTO(email,passwd);
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Error during login attempt", e);
|
||||
}
|
||||
}
|
||||
|
||||
public static int sumGefallenUrl(String eingabe) {
|
||||
|
||||
Connection con = Globals.getPoolConnection();
|
||||
Statement st = null;
|
||||
ResultSet rs = null;
|
||||
try {
|
||||
st = con.createStatement();
|
||||
String q = "select sum(gefallen) from bewertung where url like '%" + eingabe +"%' ";
|
||||
rs = st.executeQuery(q);
|
||||
|
||||
if(rs.next()){
|
||||
return rs.getInt(1);
|
||||
}else {
|
||||
return 0;
|
||||
}
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
} finally {
|
||||
try {
|
||||
if (rs != null) rs.close();
|
||||
if (st != null) st.close();
|
||||
if (con != null) con.close();
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
public static String firstKommentar (String eingabe) {
|
||||
String query = "SELECT kommentar from bewertung order by kommentar asc";
|
||||
int i = Integer.valueOf(eingabe);
|
||||
|
||||
try (Connection con = Globals.getPoolConnection();
|
||||
Statement st = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY, ResultSet.HOLD_CURSORS_OVER_COMMIT);
|
||||
|
||||
ResultSet rs = st.executeQuery(query)) {
|
||||
rs.absolute(i);
|
||||
String kommentar = rs.getString("kommentar");
|
||||
return kommentar;
|
||||
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException("Error during login attempt", e);
|
||||
}
|
||||
}
|
||||
|
||||
public static String Kommentar(String eingabe) {
|
||||
Connection con = Globals.getPoolConnection();
|
||||
Statement st = null;
|
||||
ResultSet rs = null;
|
||||
StringBuilder result = new StringBuilder();
|
||||
|
||||
try {
|
||||
st = con.createStatement();
|
||||
String q = "Select Kommentar from Bewertung where email Like '" + eingabe + "%'";
|
||||
rs = st.executeQuery(q);
|
||||
|
||||
while (rs.next()) {
|
||||
System.out.println("Erfolg");
|
||||
result.append(rs.getString("Kommentar")).append("\n");
|
||||
}
|
||||
|
||||
if (result.length() != 0)
|
||||
return result.toString();
|
||||
else
|
||||
return "Kein Kommentar gefunden";
|
||||
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
} finally {
|
||||
try {
|
||||
if (rs != null) rs.close();
|
||||
if (st != null) st.close();
|
||||
if (con != null) con.close();
|
||||
} catch (SQLException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user