refactor project structure

2025-11-13 12:14:07 +01:00
parent 00fad14ab5
commit a2bc018235
24 changed files with 0 additions and 0 deletions
--- a/src/main/java/org/example/demo/HelloServlet.java
+++ b/src/main/java/org/example/demo/HelloServlet.java
@@ -0,0 +1,27 @@
+package org.example.demo;
+
+import java.io.*;
+import jakarta.servlet.http.*;
+import jakarta.servlet.annotation.*;
+
+@WebServlet(name = "helloServlet", value = "/hello-servlet")
+public class HelloServlet extends HttpServlet {
+    private String message;
+
+    public void init() {
+        message = "Hello World!";
+    }
+
+    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
+        response.setContentType("text/html");
+
+        // Hello
+        PrintWriter out = response.getWriter();
+        out.println("<html><body>");
+        out.println("<h1>" + message + "</h1>");
+        out.println("</body></html>");
+    }
+
+    public void destroy() {
+    }
+}
--- a/src/main/java/org/example/demo/beans/StudentBean.java
+++ b/src/main/java/org/example/demo/beans/StudentBean.java
@@ -0,0 +1,27 @@
+package org.example.demo.beans;
+
+import jakarta.enterprise.context.SessionScoped;
+import jakarta.inject.Named;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.io.Serializable;
+
+@Named
+@SessionScoped
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class StudentBean implements Serializable {
+    private String name;
+    private String matrikelnummer;
+    private String studiengang;
+
+    public String speichern() {
+        return "ausgabe?faces-redirect=true";
+    }
+}
+
--- a/src/main/java/org/example/demo/models/Buch.java
+++ b/src/main/java/org/example/demo/models/Buch.java
@@ -0,0 +1,78 @@
+package org.example.demo.models;
+
+public class Buch
+{
+	//Buch Attribute
+	private String titel;
+	private double preis;
+	private int id;
+	private static Integer idCounter;
+
+	//Konstruktor
+
+	static{
+		idCounter=0;
+	}
+
+	public Buch(String titel, double preis) {
+		super();
+		this.titel = titel;
+		this.preis = preis;
+		synchronized(this.getClass()){
+			id=idCounter;
+			idCounter++;
+		}
+	}// Konstruktor
+
+	public Buch() {
+		this("",-1);
+	}// Konstruktor
+
+	//Operation update(): aendert alle Attribute
+	public void update(String titel, double preis) {
+		this.titel = titel;
+		this.preis = preis;
+	}// update
+
+	public String getTitel() {
+		return titel;
+	}
+
+	public void setTitel(String titel) {
+		this.titel = titel;
+	}
+
+	public double getPreis() {
+		return preis;
+	}
+
+	public void setPreis(double preis) {
+		this.preis = preis;
+	}
+
+	public int getId() {
+		return id;
+	}
+
+	public void setId(int id) {
+		this.id = id;
+	}
+
+	public String toString()
+	{
+		return this.titel+", "
+				+ ((""+preis).replace('.',','));
+	}// toString
+
+	public boolean equals(Object o){
+		if(o != null
+			&& o.getClass() == this.getClass()
+			&& ((Buch)o).getId()==this.getId()
+			){
+		  return true;
+		}
+		else{
+			return false;
+		}
+	}
+}// Buch
--- a/src/main/java/org/example/demo/models/BuchContainer.java
+++ b/src/main/java/org/example/demo/models/BuchContainer.java
@@ -0,0 +1,53 @@
+package org.example.demo.models;
+
+import java.util.ArrayList;
+
+public class BuchContainer 
+{
+	//Objektverwaltung
+	private ArrayList<Buch> buchContainer;
+	
+	public BuchContainer() {
+		buchContainer = new ArrayList<Buch>();
+	}// Konstruktor
+	
+	//Operation add(): fuegt ein Element hinzu
+	public void add(Buch buch)
+	{
+		buchContainer.add(buch);
+	}// add
+	
+	public void update(Buch buch, String titel, double preis) {
+
+		// Attribute des Buchs werden geaendert
+		buch.update(titel, preis);
+	}
+	
+	//Operation delete(): loescht ein Buch aus dem Container
+	public void delete(Buch buch) 
+	{ 
+		buchContainer.remove(buch);
+	}// delete
+
+	public void delete(int id) 
+	{ 
+		Buch buch = new Buch();
+		buch.setId(id);
+		buchContainer.remove(buch);
+	}// delete
+	
+	//
+	public Buch get(int id){
+		Buch buch = new Buch();
+		buch.setId(id);
+		return buchContainer.get(buchContainer.indexOf(buch));
+	}
+	
+	//Rückgabe des Containers als Array von Objekten
+	public ArrayList<Buch> getAll() 
+	{
+		return buchContainer;
+	}// getAll
+	
+}// class BuchContainer
+