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changed booklist entries 

added value validation to addbook form
added simple Error massages
This commit is contained in:
Julian Hinxlage 2019-04-25 11:31:47 +02:00
parent 61e9b4df54
commit 5849812afd
5 changed files with 116 additions and 66 deletions
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1
src/main/java/de/hsel/itech/db/Database.java
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@ -300,6 +300,7 @@ public class Database {
Map.Entry<ResultSet, Connection> entry = getResultSet(id, book);
assert entry != null;
ResultSet rs = entry.getKey();
Book book = null;
try {

17
src/main/java/de/hsel/itech/servlet/AddBook.java
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@ -6,6 +6,14 @@ import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
/**
* Servlet: form to add a book to the database
*
*
* @author Julian Hinxlage
* @version 0.1
* @since 0.1
*/
public class AddBook extends HttpServlet {
@ -18,20 +26,19 @@ public class AddBook extends HttpServlet {
Utillity.insertFile(out, "template_head.html");
out.println("<form class=\"m-container\" action=\"booklist\" method=post>");
Utillity.addInput(out, "ISBN", "isbn");
Utillity.addValidationInput(out, "ISBN", "isbn", "text", "0", "[0-9]*");
Utillity.addInput(out,"Titel", "title");
Utillity.addInput(out,"Author", "author");
Utillity.addInput(out,"Preis", "price", "0");
Utillity.addInput(out,"Jahr", "year", "2019");
Utillity.addValidationInput(out,"Preis", "price", "text", "0", "[0-9]*(,[0-9]{1,2})?");
Utillity.addValidationInput(out,"Jahr", "year", "text", "2019", "[0-9]*");
Utillity.addInput(out,"Beschreibung", "description");
Utillity.addInput(out,"Verlag", "publisher");
Utillity.addInput(out,"Kategorie", "category");
Utillity.addInput(out,"Bild", "image", "DxAzOKSiPoE");
Utillity.addTypeButton(out, "Hinzufügen", "submit");
Utillity.addSubmitButton(out, "Hinzufügen");
out.println("</form>");
//Utillity.addButton(out,"Hinzufügen", "/itech/booklist");
Utillity.addButton(out,"Zurück zur Buchliste", "booklist");
Utillity.insertFile(out, "template_footer.html");

136
src/main/java/de/hsel/itech/servlet/BookList.java
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@ -16,6 +16,14 @@ import java.time.Year;
import java.util.ArrayList;
import java.util.List;
/**
* Servlet: list of all books and remove function
*
*
* @author Julian Hinxlage
* @version 0.1
* @since 0.1
*/
public class BookList extends HttpServlet {
protected void doGet(final HttpServletRequest req, final HttpServletResponse resp)
@ -25,12 +33,11 @@ public class BookList extends HttpServlet {
//get database object
Database db = Database.getInstance();
//print parameters (debug)
/*Enumeration<String> names = req.getParameterNames();
while (names.hasMoreElements()) {
String name = names.nextElement();
System.out.println(name + "=" + req.getParameter(name));
}*/
resp.setCharacterEncoding("utf-8");
PrintWriter out = resp.getWriter();
//header template
Utillity.insertFile(out, "template_head.html");
//remove book by id
String param = req.getParameter("removeid");
@ -40,45 +47,76 @@ public class BookList extends HttpServlet {
resp.sendRedirect("booklist");
}
//add book to database
if (req.getParameter("title") != null) {
long isbn = Long.parseLong(req.getParameter("isbn"));
String title = req.getParameter("title");
String authorName = req.getParameter("author");
int price = Integer.parseInt(req.getParameter("price"));
int year = Integer.parseInt(req.getParameter("year"));
String categoryName = req.getParameter("category");
String description = req.getParameter("description");
String publisher = req.getParameter("publisher");
String image = req.getParameter("image");
try {
long isbn = Long.parseLong(req.getParameter("isbn"));
String title = req.getParameter("title");
String authorName = req.getParameter("author");
String priceString = req.getParameter("price");
String[] priceParts = priceString.split(",");
int price = Integer.parseInt(priceParts[0]) * 100;
if (priceParts.length >= 2) {
if (priceParts[1].length() == 1) {
price += Integer.parseInt(priceParts[1]) * 10;
} else {
price += Integer.parseInt(priceParts[1]);
}
}
int year = Integer.parseInt(req.getParameter("year"));
String categoryName = req.getParameter("category");
String description = req.getParameter("description");
String publisher = req.getParameter("publisher");
String image = req.getParameter("image");
ArrayList<Author> authors = new ArrayList<>();
String[] authorNames = authorName.split(",");
for (String name : authorNames) {
authors.add(new Author(name));
//check isbn
List<Book> books = db.getBooks();
boolean found = false;
if (books != null) {
for(Book b : books){
if(b.getIsbn() == isbn){
found = true;
break;
}
}
}
if (found) {
out.println("<aside class =\"m-note m-danger\">");
out.println("<h3>Es gibt breits ein buch mit dieser ISBN </h3>");
out.println("</aside>");
} else {
ArrayList<Author> authors = new ArrayList<>();
String[] authorNames = authorName.split(",");
for (String name : authorNames) {
authors.add(new Author(name));
}
Category category = new Category();
category.setName(categoryName);
Book book = new Book(isbn,
authors,
new Publisher(publisher),
category,
title, Year.of(year), price, description, image
);
db.insert(book);
resp.sendRedirect("booklist");
}
}
catch (Exception e){
e.printStackTrace();
out.println("<aside class =\"m-note m-danger\">");
out.println("<h3>Es gibt ein Fehler in der Eingabe </h3>");
out.println("</aside>");
}
Category category = new Category();
category.setName(categoryName);
Book book = new Book(isbn,
authors,
new Publisher(publisher),
category,
title, Year.of(year), price, description, image
);
db.insert(book);
resp.sendRedirect("booklist");
}
resp.setCharacterEncoding("utf-8");
PrintWriter out = resp.getWriter();
//header template
Utillity.insertFile(out, "template_head.html");
//list all books
List<Book> books = db.getBooks();
if (books != null) {
//book entries
@ -92,18 +130,16 @@ public class BookList extends HttpServlet {
out.println(" </div>");
out.println(" <div class=\"m-col-l-4\">");
out.println("<h1>" + book.getTitle() + "</h1>");
out.println(" <br>");
out.println("<h2>" + book.getTitle() + "</h2>");
out.println("ISBN: " + book.getIsbn() + "</br>");
for (int i = 0; i < book.getAuthors().size(); i++) {
out.println(" <h2>" + book.getAuthors().get(0).getName() + "</h2>");
out.println("von " + book.getAuthors().get(0).getName());
}
out.println(" <br>");
out.print(" <h3>" + book.getPrice() / 100 + ",");
if (book.getPrice() % 100 < 10) {
out.print("0");
}
out.println(book.getPrice() % 100 + " &euro;</h3>");
out.println(" <br>");
out.println("</br>Veröffentlicht von " + book.getPublisher().getName() + "");
out.println("</br></br>" + book.getDescription() + "");
out.println(" </div>");
out.println(" <div class=\"m-col-l-4\">");
@ -113,6 +149,16 @@ public class BookList extends HttpServlet {
out.println("Entfernen");
out.println("</a>");
out.println(" <br>");
out.println(" <br>");
out.print(" <h3>" + book.getPrice() / 100 + ",");
if (book.getPrice() % 100 < 10) {
out.print("0");
}
out.println(book.getPrice() % 100 + " &euro;</h3>");
out.println(" </div>");
out.println(" </div>");
out.println(" </div>");

26
src/main/java/de/hsel/itech/servlet/Utillity.java
View File

@ -30,6 +30,15 @@ public class Utillity {
out.println("</div>");
}
static public void addValidationInput(PrintWriter out, String label, String name, String type, String value, String pattern){
out.println(" <div class=\"m-row\">");
out.println(" <div class=\"m-col-l-2 m-push-l-5\">");
out.println(label);
out.println("<input type=\"" + type + "\" name=\"" + name + "\" value=\"" + value + "\"required pattern=\"" + pattern + "\">");
out.println("</div>");
out.println("</div>");
}
static public void addButton(PrintWriter out, String label, String url){
out.println(" <div class=\"m-row\">");
out.println(" <div class=\"m-col-l-4 m-push-l-4\">");
@ -42,23 +51,10 @@ public class Utillity {
out.println("</div>");
}
static public void addTypeButton(PrintWriter out, String label, String type){
/*
out.println(" <div class=\"m-row\">");
out.println(" <div class=\"m-col-l-4 m-push-l-4\">");
out.println(" <div class=\"m-button m-success\">");
out.println("<a href=\"" + "" + "\">");
out.println(label);
out.println("<input class=\"m-button m-success\" type=\"" + type + "\" value=\"" + label + "\">");
out.println("</a>");
out.println(" </div>");
out.println("</div>");
out.println("</div>");
*/
static public void addSubmitButton(PrintWriter out, String label){
out.println(" <div class=\"m-row\">");
out.println(" <div class=\"m-col-l-4 m-push-l-5\">");
out.println(" <input type=\"" + type + "\" value=\"" + label + "\">");
out.println(" <input type=\"" + "submit" + "\" value=\"" + label + "\">");
out.println(" </div>");
out.println("</div>");
}

2
src/main/resources/database.sql
View File

@ -1,6 +1,6 @@
CREATE TABLE IF NOT EXISTS test(id bigint primary key auto_increment, hello varchar(25));
INSERT IGNORE INTO test(hello) values ('Welt');
CREATE TABLE IF NOT EXISTS book (id bigint primary key auto_increment, isbn bigint unique, title varchar(50), description varchar(500), price int, year year, publisher bigint, category bigint, image varchar(11) unique);
CREATE TABLE IF NOT EXISTS book (id bigint primary key auto_increment, isbn bigint unique, title varchar(50), description varchar(500), price int, year year, publisher bigint, category bigint, image varchar(11));
CREATE TABLE IF NOT EXISTS publisher(id bigint primary key auto_increment, name varchar(50) unique);
CREATE TABLE IF NOT EXISTS author(id bigint primary key auto_increment, name varchar(50) unique);
CREATE TABLE IF NOT EXISTS author_book(author bigint, book bigint, primary key(author, book), foreign key (author) REFERENCES author(id), foreign key (book) references book(id));