Studium/Internet-Technologien
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~ cleanup

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Signed-off-by: Johannes Theiner <j.theiner@live.de>
This commit is contained in:
Johannes Theiner 2019-05-01 16:34:12 +02:00
parent 813c3aa1f3
commit c9785a5f32
6 changed files with 71 additions and 40 deletions
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2
src/main/java/de/hsel/itech/config/Configuration.java
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@ -25,6 +25,8 @@ public class Configuration {
@Getter
private Database database;
@Getter
private Unsplash unsplash;
/**

20
src/main/java/de/hsel/itech/config/Unsplash.java Normal file
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@ -0,0 +1,20 @@
package de.hsel.itech.config;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.ToString;
/**
* @author Johannes Theiner
* @version 0.1
* @since 0.1
**/
@Getter
@ToString
@EqualsAndHashCode
public class Unsplash {
private String accessKey;
private String secretKey;
}

18
src/main/java/de/hsel/itech/db/Database.java
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@ -126,7 +126,7 @@ public class Database {
* @return {@link de.hsel.itech.db.pojo.Author}
*/
@Nullable
public Author getAuthor(String name) {
public Author getAuthor(@NotNull String name) {
Map.Entry<ResultSet, Connection> entry = getResultSetsByValue(author, "name", name);
assert entry != null;
assert entry.getKey() != null;
@ -171,7 +171,7 @@ public class Database {
* @return {@link de.hsel.itech.db.pojo.Category}
*/
@Nullable
public Category getCategory(String name) {
public Category getCategory(@NotNull String name) {
Map.Entry<ResultSet, Connection> entry = getResultSetsByValue(category, "name", name);
assert entry != null;
@ -243,7 +243,7 @@ public class Database {
* @return {@link de.hsel.itech.db.pojo.Publisher}
*/
@Nullable
public Publisher getPublisher(String name) {
public Publisher getPublisher(@NotNull String name) {
Map.Entry<ResultSet, Connection> entry = getResultSetsByValue(publisher, "name", name);
assert entry != null;
assert entry.getKey() != null;
@ -463,6 +463,7 @@ public class Database {
assert publisher != null;
assert category != null;
//insert book
try {
PreparedStatement statement = connection.prepareStatement("INSERT INTO book(isbn, title, description, " +
"price, year, publisher, category, image) VALUES (?, ?, ?, ?, ?, ?, ?, ?)", Statement.RETURN_GENERATED_KEYS);
@ -481,6 +482,7 @@ public class Database {
lastId = resultSet.getLong("id");
}
//add book to author
for (Author author : authors) {
PreparedStatement authorStatement = connection.prepareStatement("INSERT INTO " + authorBook + " (author, book) VALUES (?, ?);");
authorStatement.setLong(1, author.getId());
@ -633,7 +635,7 @@ public class Database {
* @param table table name
* @return deletion count
*/
private int delete(long id, String table) {
private int delete(long id, @NotNull String table) {
Connection connection = getConnection();
assert connection != null;
@ -656,7 +658,7 @@ public class Database {
* @param table table
* @return list of ids
*/
private List<Long> getIds(String table) {
private List<Long> getIds(@NotNull String table) {
Map.Entry<ResultSet, Connection> entry = getColumnsFromResultSet(table, "id");
assert entry != null;
@ -683,12 +685,12 @@ public class Database {
* @return {@link java.util.Map.Entry}
*/
@Nullable
private Map.Entry<ResultSet, Connection> getResultSetById(String table, long id) {
private Map.Entry<ResultSet, Connection> getResultSetById(@NotNull String table, long id) {
return getResultSetByValue(table, "id", id);
}
@Nullable
private Map.Entry<ResultSet, Connection> getResultSetByValue(String table, String column, long value) {
private Map.Entry<ResultSet, Connection> getResultSetByValue(@NotNull String table, @NotNull String column, long value) {
Connection connection = getConnection();
try {
assert connection != null;
@ -793,7 +795,7 @@ public class Database {
@Nullable
private String getRandomImage() {
try {
InputStream is = new URL("https://api.unsplash.com/photos/random?client_id=bb18673959b1cfd053a4ecb58e85bb8d99a0050ae5b71dac3e7632916eead9aa").openStream();
InputStream is = new URL("https://api.unsplash.com/photos/random?client_id=" + Configuration.get().getUnsplash().getAccessKey()).openStream();
try {
BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
StringBuilder sb = new StringBuilder();

23
src/main/java/de/hsel/itech/servlet/AddBook.java
View File

@ -1,5 +1,7 @@
package de.hsel.itech.servlet;
import org.jetbrains.annotations.NotNull;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
@ -10,7 +12,6 @@ import java.io.PrintWriter;
/**
* Servlet: form to add a book to the database
*
*
* @author Julian Hinxlage
* @version 0.1
* @since 0.1
@ -20,7 +21,7 @@ import java.io.PrintWriter;
public class AddBook extends HttpServlet {
protected void doGet(final HttpServletRequest req, final HttpServletResponse resp)
protected void doGet(@NotNull final HttpServletRequest req, @NotNull final HttpServletResponse resp)
throws IOException {
resp.setCharacterEncoding("utf-8");
@ -30,19 +31,19 @@ public class AddBook extends HttpServlet {
out.println("<form class=\"m-container\" action=\"booklist\" method=post>");
Utillity.addValidationInput(out, "ISBN", "isbn", "text", "0", "[0-9]*");
Utillity.addInput(out,"Titel", "title");
Utillity.addInput(out,"Author", "author");
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");
Utillity.addInput(out, "Titel", "title");
Utillity.addInput(out, "Author", "author");
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");
Utillity.addSubmitButton(out, "Hinzufügen");
out.println("</form>");
Utillity.addButton(out,"Zurück zur Buchliste", "booklist");
Utillity.addButton(out, "Zurück zur Buchliste", "booklist");
Utillity.insertFile(out, "template_footer.html");
}

24
src/main/java/de/hsel/itech/servlet/BookList.java
View File

@ -5,6 +5,7 @@ import de.hsel.itech.db.pojo.Author;
import de.hsel.itech.db.pojo.Book;
import de.hsel.itech.db.pojo.Category;
import de.hsel.itech.db.pojo.Publisher;
import org.jetbrains.annotations.NotNull;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
@ -20,7 +21,6 @@ import java.util.List;
/**
* Servlet: list of all books and remove function
*
*
* @author Julian Hinxlage
* @version 0.1
* @since 0.1
@ -29,14 +29,19 @@ import java.util.List;
@WebServlet("/booklist")
public class BookList extends HttpServlet {
protected void doGet(final HttpServletRequest req, final HttpServletResponse resp)
throws IOException {
@Override
protected void doGet(@NotNull HttpServletRequest req, @NotNull HttpServletResponse resp) throws IOException {
doPost(req, resp);
}
@Override
protected void doPost(@NotNull final HttpServletRequest req, @NotNull final HttpServletResponse resp) throws IOException {
req.setCharacterEncoding(StandardCharsets.UTF_8.name());
//get database object
Database db = Database.getInstance();
resp.setCharacterEncoding("utf-8");
resp.setCharacterEncoding(StandardCharsets.UTF_8.name());
PrintWriter out = resp.getWriter();
//header template
@ -94,8 +99,7 @@ public class BookList extends HttpServlet {
db.insert(book);
resp.sendRedirect("booklist");
}
}
catch (Exception e){
} catch (Exception e) {
e.printStackTrace();
out.println("<aside class =\"m-note m-danger\">");
out.println("<h3>Es gibt ein Fehler in der Eingabe </h3>");
@ -105,7 +109,6 @@ public class BookList extends HttpServlet {
}
//list all books
List<Book> books = db.getBooks();
if (books != null) {
@ -125,7 +128,7 @@ public class BookList extends HttpServlet {
out.println("ISBN: " + book.getIsbn() + "</br>");
List<String> authors = new ArrayList<>();
for(Author author : book.getAuthors()) {
for (Author author : book.getAuthors()) {
authors.add(author.getName());
}
@ -167,9 +170,4 @@ public class BookList extends HttpServlet {
Utillity.insertFile(out, "template_footer.html");
}
protected void doPost(final HttpServletRequest req, final HttpServletResponse resp)
throws IOException {
doGet(req, resp);
}
}

24
src/main/java/de/hsel/itech/servlet/Utillity.java
View File

@ -1,14 +1,22 @@
package de.hsel.itech.servlet;
import org.jetbrains.annotations.NotNull;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Objects;
/**
* @author Julian Hinxlage
* @version 0.1
* @since 0.1
*/
public class Utillity {
static public void insertFile(PrintWriter out, String fileName) {
try (BufferedReader br = new BufferedReader(new FileReader(Utillity.class.getClassLoader().getResource(fileName).getFile()))) {
public static void insertFile(@NotNull PrintWriter out, @NotNull String fileName) {
try (BufferedReader br = new BufferedReader(new FileReader(Objects.requireNonNull(Utillity.class.getClassLoader().getResource(fileName)).getFile()))) {
for (String line = br.readLine(); line != null; line = br.readLine()) {
out.println(line);
}
@ -17,11 +25,11 @@ public class Utillity {
}
}
static public void addInput(PrintWriter out, String label, String name){
addInput(out,label,name,"");
public static void addInput(@NotNull PrintWriter out, @NotNull String label, @NotNull String name) {
addInput(out, label, name, "");
}
static public void addInput(PrintWriter out, String label, String name, String value){
public static void addInput(@NotNull PrintWriter out, @NotNull String label, @NotNull String name, @NotNull String value) {
out.println(" <div class=\"m-row\">");
out.println(" <div class=\"m-col-l-2 m-push-l-5\">");
out.println(label);
@ -30,7 +38,7 @@ public class Utillity {
out.println("</div>");
}
static public void addValidationInput(PrintWriter out, String label, String name, String type, String value, String pattern){
public static void addValidationInput(@NotNull PrintWriter out, @NotNull String label, @NotNull String name, @NotNull String type, @NotNull String value, @NotNull String pattern) {
out.println(" <div class=\"m-row\">");
out.println(" <div class=\"m-col-l-2 m-push-l-5\">");
out.println(label);
@ -39,7 +47,7 @@ public class Utillity {
out.println("</div>");
}
static public void addButton(PrintWriter out, String label, String url){
public static void addButton(@NotNull PrintWriter out, @NotNull String label, @NotNull String url) {
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\">");
@ -51,7 +59,7 @@ public class Utillity {
out.println("</div>");
}
static public void addSubmitButton(PrintWriter out, String label){
public static void addSubmitButton(@NotNull PrintWriter out, @NotNull String label) {
out.println(" <div class=\"m-row\">");
out.println(" <div class=\"m-col-l-4 m-push-l-5\">");
out.println(" <input type=\"" + "submit" + "\" value=\"" + label + "\">");