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@ -1,8 +1,41 @@ |
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<!DOCTYPE html> |
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<html lang="en" xmlns:th="http://www.thymeleaf.org"> |
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<!--/* |
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Idea of the following syntax used in this and other HTML document: |
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<foo th:text="${#messages.msgOrNull('<key_from_messages.properties>')} ?: 'myThymeleafText'"> |
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myHTMLPlainText |
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</foo> |
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-> A) In Thymeleaf, we check if a message key exists. In normal cases, a non-existent key is NOT null. |
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Therefore, we use method msgorNull and enforce null value if the message key is not found. |
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-> B) IF key is null: in section '?: myThymeleafText' we use text 'myThymeleafText' as a replacement |
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value for the HTML tag string value. |
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-> C) The last string value 'myHTMLPlainText' between tags is used if we open plain HTML file without |
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Thymeleaf rendering. This is useful for offline viewing and for developers who want correct file |
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rendering without Java overhead. |
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*/--> |
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<head> |
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> |
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<!--/* |
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CSS href fields: |
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Plain HTML rendering gets CSS style files directly from the relative file system path. |
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This is useful for offline viewing and for developers who want correct file |
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rendering without Java overhead. |
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Instead, Thymeleaf template engine gets CSS style files via URI refs. Therefore, values of |
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href and th:href differ. However, both use cases are covered: Thymeleaf & plain HTML. |
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*/--> |
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<link type="text/css" rel="stylesheet" href="../static/css/bookstore.css" th:href="@{../css/bookstore.css}" /> |
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<link type="text/css" rel="stylesheet" href="../static/css/bootstrap.min.css" th:href="@{../css/bootstrap.min.css}" /> |
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@ -52,12 +85,33 @@ |
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| else: |
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| Author is string value 'book.null.author' |
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*/--> |
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<td th:text="${book.author != null} ? ( (${book.author.firstName != null} ? (${book.author.firstName} + ' ') : '') + (${book.author.lastName != null} ? ${book.author.lastName} : '') ) : (${#messages.msgOrNull('book.null.author')} ?: 'book.null.author')">(obj) book.author.firstName (obj) book.author.lastName</td> |
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<td th:text="${book.title}">(obj) book.title</td> |
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<td th:text="${book.isbn}">(obj) book.isbn</td> |
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<td th:text="${book.year}">(obj) book.year</td> |
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<!--/* |
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Check if book.category exists (book entity object). If yes, then: |
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Get string value of book.category.name (book entity object (method)) |
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else: |
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|-> Check if book.null.category (message key) exists. If yes, then: |
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| Get string value of book.null.category message key |
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| else: |
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| Category is string value 'book.null.category' |
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*/--> |
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<td th:text="${book.category != null} ? ${book.category.name} : (${#messages.msgOrNull('book.null.category')} ?: 'book.null.category')">(obj) book.category.name</td> |
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<!--/* |
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Get book price with two decimal precision. |
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If price is not found, fall back to string value 0.00. |
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Combine with message key 'page.symbols.currency' value. |
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*/--> |
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<td th:text="(${#numbers.formatDecimal(book.price, 1, 2)} ?: '0.00') + ' ' + (${#messages.msgOrNull('page.symbols.currency')} ?: 'page.symbols.currency')"> |
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0.00 page.symbols.currency |
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</td> |
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Pekka Helenius
4 years ago