waluty - wersje StAX

src/main/java/p20_xml/Waluty2_XPath.java

@@ -60,6 +60,7 @@ public class Waluty2_XPath {
             System.out.printf("Zajęta pamięć      : %,d B%n", pamiec);
             System.out.println("Count: " + count);
             if(count > 0) {
+                System.out.println("Sum: " + sum);
                 System.out.println("Avg: " + (sum / count));
                 System.out.println("Min: " + min);
                 System.out.println("Max: " + max);

src/main/java/p20_xml/Waluty4_Stax.java

+package p20_xml;
+
+import javax.xml.stream.XMLEventReader;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.events.XMLEvent;
+import java.io.FileReader;
+
+public class Waluty4_Stax {
+
+    public static void main(String[] args) {
+        String plik = "pliki/waluty2023.xml";
+        String waluta = "EUR";
+
+        System.out.println("Startujemy");
+        long t1 = System.nanoTime();
+        try {
+            XMLInputFactory xif = XMLInputFactory.newDefaultFactory();
+            XMLEventReader reader = xif.createXMLEventReader(new FileReader(plik));
+
+            double min = Double.MAX_VALUE, max = 0, sum = 0;
+            int count = 0;
+
+            while(reader.hasNext()) {
+                XMLEvent event = reader.nextEvent();
+                if(event.isStartElement() && event.asStartElement().getName().getLocalPart().equals("Rate")) {
+                    boolean uwzgledniajWalute = false;
+                    while(true) {
+                        XMLEvent event2 = reader.nextEvent();
+                        if(event2.isStartElement() && event2.asStartElement().getName().getLocalPart().equals("Code")) {
+                            if(waluta.equals(reader.getElementText())) {
+                                uwzgledniajWalute = true;
+                            }
+                        }
+                        if(event2.isStartElement() && event2.asStartElement().getName().getLocalPart().equals("Mid")) {
+                            if(uwzgledniajWalute) {
+                                double mid = Double.parseDouble(reader.getElementText());
+                                count++;
+                                sum += mid;
+                                if(mid < min) min = mid;
+                                if(mid > max) max = mid;
+                            }
+                        }
+                        if(event2.isEndElement() && event2.asEndElement().getName().getLocalPart().equals("Rate")) {
+                            break;
+                        }
+                    }
+                }
+            }
+
+            long t3 = System.nanoTime();
+            Runtime runtime = Runtime.getRuntime();
+            long pamiec = runtime.totalMemory() - runtime.freeMemory();
+
+            System.out.printf("Czas łączny        : %.6f s%n", (t3-t1) * 1e-9);
+            System.out.printf("Zajęta pamięć      : %,d B%n", pamiec);
+            System.out.println("Count: " + count);
+            if(count > 0) {
+                System.out.println("Sum: " + sum);
+                System.out.println("Avg: " + (sum / count));
+                System.out.println("Min: " + min);
+                System.out.println("Max: " + max);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/p20_xml/Waluty5_Stax.java

+package p20_xml;
+
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLInputFactory;
+import java.io.FileReader;
+
+public class Waluty5_Stax {
+
+    public static void main(String[] args) {
+        String plik = "pliki/waluty2023.xml";
+        String waluta = "EUR";
+
+        System.out.println("Startujemy");
+        long t1 = System.nanoTime();
+        try {
+            XMLInputFactory xif = XMLInputFactory.newDefaultFactory();
+            XMLStreamReader reader = xif.createXMLStreamReader(new FileReader(plik));
+
+            double min = Double.MAX_VALUE, max = 0, sum = 0;
+            int count = 0;
+
+            while(reader.hasNext()) {
+                int event = reader.next();
+                if(event == XMLStreamReader.START_ELEMENT && reader.getName().getLocalPart().equals("Rate")) {
+                    boolean uwzgledniajWalute = false;
+                    while(true) {
+                        reader.next();
+                        if(reader.isStartElement() && reader.getName().getLocalPart().equals("Code")) {
+                            if(waluta.equals(reader.getElementText())) {
+                                uwzgledniajWalute = true;
+                            }
+                        }
+                        if(reader.isStartElement() && reader.getName().getLocalPart().equals("Mid")) {
+                            if(uwzgledniajWalute) {
+                                double mid = Double.parseDouble(reader.getElementText());
+                                count++;
+                                sum += mid;
+                                if(mid < min) min = mid;
+                                if(mid > max) max = mid;
+                            }
+                        }
+                        if(reader.isEndElement() && reader.getName().getLocalPart().equals("Rate")) {
+                            break;
+                        }
+                    }
+                }
+            }
+
+            long t3 = System.nanoTime();
+            Runtime runtime = Runtime.getRuntime();
+            long pamiec = runtime.totalMemory() - runtime.freeMemory();
+
+            System.out.printf("Czas łączny        : %.6f s%n", (t3-t1) * 1e-9);
+            System.out.printf("Zajęta pamięć      : %,d B%n", pamiec);
+            System.out.println("Count: " + count);
+            if(count > 0) {
+                System.out.println("Sum: " + sum);
+                System.out.println("Avg: " + (sum / count));
+                System.out.println("Min: " + min);
+                System.out.println("Max: " + max);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}