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Merge pull request #4451 from cdjole/thymeleaf_list_example 

BAEL-1661 - Binding a List in Thymeleaf
This commit is contained in:
Loredana Crusoveanu 2018-06-11 10:14:46 +03:00 committed by GitHub
parent 293d4bc9aa c62b0a12a6
commit 096826cc07
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GPG Key ID: 4AEE18F83AFDEB23
12 changed files with 421 additions and 0 deletions
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1
spring-mvc-forms-thymeleaf/pom.xml
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@ -69,6 +69,7 @@
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<thymeleaf.version>3.0.9.RELEASE</thymeleaf.version> <thymeleaf.version>3.0.9.RELEASE</thymeleaf.version>
<start-class>com.baeldung.sessionattrs.SessionAttrsApplication</start-class>
</properties> </properties>
</project> </project>

73
spring-mvc-forms-thymeleaf/src/main/java/com/baeldung/listbindingexample/Book.java Normal file
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package com.baeldung.listbindingexample;
public class Book {
private long id;
private String title;
private String author;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((author == null) ? 0 : author.hashCode());
result = prime * result + (int) (id ^ (id >>> 32));
result = prime * result + ((title == null) ? 0 : title.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Book other = (Book) obj;
if (author == null) {
if (other.author != null)
return false;
} else if (!author.equals(other.author))
return false;
if (id != other.id)
return false;
if (title == null) {
if (other.title != null)
return false;
} else if (!title.equals(other.title))
return false;
return true;
}
@Override
public String toString() {
return "Book [id=" + id + ", title=" + title + ", author=" + author + "]";
}
}

10
spring-mvc-forms-thymeleaf/src/main/java/com/baeldung/listbindingexample/BookService.java Normal file
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package com.baeldung.listbindingexample;
import java.util.List;
public interface BookService {
List<Book> findAll();
void saveAll(List<Book> books);
}

29
spring-mvc-forms-thymeleaf/src/main/java/com/baeldung/listbindingexample/BooksCreationDto.java Normal file
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package com.baeldung.listbindingexample;
import java.util.ArrayList;
import java.util.List;
public class BooksCreationDto {
private List<Book> books;
public BooksCreationDto() {
this.books = new ArrayList<>();
}
public BooksCreationDto(List<Book> books) {
this.books = books;
}
public List<Book> getBooks() {
return books;
}
public void setBooks(List<Book> books) {
this.books = books;
}
public void addBook(Book book) {
this.books.add(book);
}
}

33
spring-mvc-forms-thymeleaf/src/main/java/com/baeldung/listbindingexample/Config.java Normal file
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package com.baeldung.listbindingexample;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.templateresolver.ClassLoaderTemplateResolver;
import org.thymeleaf.templateresolver.ITemplateResolver;
@EnableWebMvc
@Configuration
public class Config implements WebMvcConfigurer {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("index");
registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
}
@Bean
public ITemplateResolver templateResolver() {
ClassLoaderTemplateResolver resolver
= new ClassLoaderTemplateResolver();
resolver.setPrefix("templates/books/");
resolver.setSuffix(".html");
resolver.setTemplateMode(TemplateMode.HTML);
resolver.setCharacterEncoding("UTF-8");
return resolver;
}
}

44
spring-mvc-forms-thymeleaf/src/main/java/com/baeldung/listbindingexample/InMemoryBookService.java Normal file
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package com.baeldung.listbindingexample;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;
@Service
public class InMemoryBookService implements BookService {
static Map<Long, Book> booksDB = new HashMap<>();
@Override
public List<Book> findAll() {
return new ArrayList(booksDB.values());
}
@Override
public void saveAll(List<Book> books) {
long nextId = getNextId();
for (Book book : books) {
if (book.getId() == 0) {
book.setId(nextId++);
}
}
Map<Long, Book> bookMap = books.stream()
.collect(Collectors.toMap(
Book::getId, Function.identity()));
booksDB.putAll(bookMap);
}
private Long getNextId(){
return booksDB.keySet().stream()
.mapToLong(value -> value)
.max()
.orElse(0) + 1;
}
}

16
spring-mvc-forms-thymeleaf/src/main/java/com/baeldung/listbindingexample/ListBindingApplication.java Normal file
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package com.baeldung.listbindingexample;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
@SpringBootApplication(
exclude = {SecurityAutoConfiguration.class,
DataSourceAutoConfiguration.class})
public class ListBindingApplication {
public static void main(String[] args) {
SpringApplication.run(ListBindingApplication.class, args);
}
}

59
spring-mvc-forms-thymeleaf/src/main/java/com/baeldung/listbindingexample/MultipleBooksController.java Normal file
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package com.baeldung.listbindingexample;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.ArrayList;
import java.util.List;
@Controller
@RequestMapping("/books")
public class MultipleBooksController {
@Autowired
private BookService bookService;
@GetMapping(value = "/all")
public String showAll(Model model) {
model.addAttribute("books", bookService.findAll());
return "allBooks";
}
@GetMapping(value = "/create")
public String showCreateForm(Model model) {
BooksCreationDto booksForm = new BooksCreationDto();
for (int i = 1; i <= 3; i++) {
booksForm.addBook(new Book());
}
model.addAttribute("form", booksForm);
return "createBooksForm";
}
@GetMapping(value = "/edit")
public String showEditForm(Model model) {
List<Book> books = new ArrayList<>();
bookService.findAll().iterator().forEachRemaining(books::add);
model.addAttribute("form", new BooksCreationDto(books));
return "editBooksForm";
}
@PostMapping(value = "/save")
public String saveBooks(@ModelAttribute BooksCreationDto form, Model model) {
bookService.saveAll(form.getBooks());
model.addAttribute("books", bookService.findAll());
return "redirect:/books/all";
}
}

40
spring-mvc-forms-thymeleaf/src/main/resources/templates/books/allBooks.html Normal file
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<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>All Books</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-12">
<h1> Books </h1>
</div>
</div>
<div class="row">
<div class="col-md-6">
<table class="table">
<thead>
<tr>
<th> Title </th>
<th> Author </th>
</tr>
</thead>
<tbody>
<tr th:if="${books.empty}">
<td colspan="2"> No Books Available </td>
</tr>
<tr th:each="book : ${books}">
<td><span th:text="${book.title}"> Title </span></td>
<td><span th:text="${book.author}"> Author </span></td>
</tr>
</tbody>
</table>
</div>
<div class="col-md-6">
<a class="btn btn-success" href="#" th:href="@{/books/create}"> Add Books </a>
<a class="btn btn-primary" href="#" th:href="@{/books/edit}" th:classappend="${books.empty} ? 'disabled' : ''"> Edit Books </a>
</div>
</div>
</div>
</body>
</html>

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spring-mvc-forms-thymeleaf/src/main/resources/templates/books/createBooksForm.html Normal file
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<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Add Books</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"/>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-12">
<h1> Add Books </h1>
</div>
</div>
<div class="row">
<div class="col-md-6">
<a class="btn btn-info" href="#" th:href="@{/books/all}"> Back to All Books </a>
<form action="#" class="form-horizontal"
th:action="@{/books/save}"
th:object="${form}"
method="post">
<fieldset>
<span class="pull-right">
<input type="submit" id="submitButton" class="btn btn-success" th:value="Save">
<input type="reset" id="resetButton" class="btn btn-danger" th:value="Reset"/>
</span>
<table class="table">
<thead>
<tr>
<th> Title</th>
<th> Author</th>
</tr>
</thead>
<tbody>
<tr th:each="book, itemStat : *{books}">
<td><input th:placeholder="Title + ' ' + ${itemStat.count}" th:field="*{books[__${itemStat.index}__].title}" required/></td>
<td><input th:placeholder="Author + ' ' + ${itemStat.count}" th:field="*{books[__${itemStat.index}__].author}" required/></td>
</tr>
</tbody>
</table>
</fieldset>
</form>
</div>
</div>
</div>
</body>
</html>

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spring-mvc-forms-thymeleaf/src/main/resources/templates/books/editBooksForm.html Normal file
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<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Edit Books</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"/>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-12">
<h1> Add Books </h1>
</div>
</div>
<div class="row">
<div class="col-md-6">
<a class="btn btn-info" href="#" th:href="@{/books/all}"> Back to All Books </a>
<form action="#" class="form-horizontal"
th:action="@{/books/save}"
th:object="${form}"
method="post">
<fieldset>
<span class="pull-right">
<input type="submit" id="submitButton" class="btn btn-success" th:value="Save">
<input type="reset" id="resetButton" class="btn btn-danger" th:value="Reset"/>
</span>
<table class="table">
<thead>
<tr>
<th></th>
<th> Title</th>
<th> Author</th>
</tr>
</thead>
<tbody>
<tr th:each="book, itemStat : ${form.books}">
<td><input hidden th:name="|books[${itemStat.index}].id|" th:value="${book.getId()}"/></td>
<td><input th:placeholder="Title + ' ' + ${itemStat.count}" th:name="|books[${itemStat.index}].title|" th:value="${book.getTitle()}"
required/></td>
<td><input th:placeholder="Author + ' ' + ${itemStat.count}" th:name="|books[${itemStat.index}].author|"
th:value="${book.getAuthor()}" required/></td>
</tr>
</tbody>
</table>
</fieldset>
</form>
</div>
</div>
</div>
</body>
</html>

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spring-mvc-forms-thymeleaf/src/main/resources/templates/books/index.html Normal file
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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4" lang="en">
<head>
<title>Binding a List in Thymeleaf</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
</head>
<body>
<div class="container">
<p>
<h3>Binding a List in Thymeleaf - Example</h3>
</p>
</div>
<div class="container">
<a class="btn btn-info" href="#" th:href="@{/books/all}"> Books List </a>
</div>
</body>
</html>