Inhaltsverzeichnis

Predefined Objects
Basic Objects
Utility Objects

Vordefinierte Objekte in Thymeleaf

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Anleitungen Thymeleaf

Predefined Objects
Basic Objects
Utility Objects

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1- Predefined Objects

In Thymeleaf gibt es einige Objekte, die vordefiniert werden und Sie können sie überall in Thymeleaf Template benutzen. Im Grunde gibt es 2 solchen Objektstypen. Das sind die Basic Objekte und die Utility Objekte:

Die vordefinierten Objekte werden nach der Standard OGNL referenziert, die mit dem Zeichen ( # ) beginnt.

2- Basic Objects

Object	Class/Interface	Die Bezeichnung
#ctx	org.thymeleaf.context.IContext org.thymeleaf.context.IWebContext	Ein Objekt implementiert die Interface IContext oder IWebContext, das von der Umwelt abhängig ist (Standard oder Web).
#locale	java.util.Locale	Ein Objekt versorgt die Informationen,die Locale betreffen.
#request	javax.servlet.http.HttpServletRequest	(Nur in die Umwelt Web) das Objekt HttpServletRequest.
#response	javax.servlet.http.HttpServletResponse	(Nur in die Umwelt Web) das Objekt HttpServletResponse.
#session	javax.servlet.http.HttpSession	(Nur in die Umwelt Web) das Objekt HttpSession.
#servletContext	javax.servlet.http.ServletContext	(Nur in die Umwelt Web) das Objekt ServletContext.

IWebContext

IContext

#ctx

#ctx ist ein Context Objekt. Es implementiert die Interface org.thymeleaf.context.IContext oder org.thymeleaf.context.IWebContext, das von der Umwelt (Standard oder Web) abhängig ist.

Die zwei anderen Objekte #vars, #root sind gleich wie #ctx. Aber #ctx wird empfohlen zu benutzen anstatt von 2 anderen Objekte.

Abhängig von der Umwelt, Standard oder Web, kann das Objekt #ctx Sie die Information versorgen:


<!--
 * ===============================================
 * See javadoc API for class org.thymeleaf.context.IContext
 * ===============================================
 -->

${#ctx.locale}
${#ctx.variableNames}

<!--
 * ================================================
 * See javadoc API for class org.thymeleaf.context.IWebContext
 * ================================================
  -->

${#ctx.request}
${#ctx.response}
${#ctx.session}
${#ctx.servletContext}

In der Umwelt Spring funktioniert das Objekt #ctx nicht wie erwartet. ${#ctx.locale}, ${#ctx.request}, ${#ctx.response}, ${#ctx.request}, ${#ctx.servletContext} gibt immer null zurück. Sie sollen die Objekte #locale, #request, #response, #servletContext benutzen um zu ersetzen.

#locale

Das Objekt #locale (java.util.Locale) bietet Sie die Information von der Umwelt, in die die Applikation funktioniert, z.B die geografischer Bereich, Sprache, Kultur, digitales Format, Datums- und Uhrzeitformat, ...

predefined-object-locale.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
   <head>
      <meta charset="UTF-8" />
      <title>Predefined Objects</title>
   </head>
   <body>
       <h1>Predefined Object #locale</h1>
       <h3>#locale.locale</h3>
       <span th:utext="${#locale.country}"></span>
       <h3>#locale.language</h3>
       <span th:utext="${#locale.language}"></span>
   </body>
</html>

#request

predefined-object-request.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
   <head>
      <meta charset="UTF-8" />
      <title>Predefined Objects</title>
   </head>
   <body>
       <h1>Predefined Object #request</h1>
       <h3>#request.contextPath</h3>
       <span th:utext="${#request.contextPath}"></span>
       <h3>#request.requestURI</h3>
       <span th:utext="${#request.requestURI}"></span>
       <h3>#request.requestURL</h3>
       <span th:utext="${#request.requestURL}"></span>
   </body>
</html>

#response

predefined-object-response.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
   <head>
      <meta charset="UTF-8" />
      <title>Predefined Objects</title>
   </head>
   <body>
       <h1>Predefined Object #response</h1>
       <h3>#response.headerNames  (java.utils.Enumeration)</h3>
       <ul>
          <th:block  th:each="headerName : ${#request.headerNames}">
            <li th:utext="${headerName}">Header Name</li>
          </th:block>
       </ul>  
   </body>
</html>

#servletContext

predefined-object-servletContext.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
   <head>
      <meta charset="UTF-8" />
      <title>Predefined Objects</title>
   </head>
   <body>
       <h1>Predefined Object #servletContext</h1>
       <h3>#servletContext.attributeNames (java.utils.Enumeration)</h3>
       <ul>
          <th:block th:each="attrName : ${#servletContext.attributeNames}">
            <li th:utext="${attrName}">Attribute Name</li>
            <li th:utext="${#servletContext.getAttribute(attrName)}">Attribute Value</li>
          </th:block>
       </ul>  
   </body>
</html>

#session

Spring Controller


// ....
@RequestMapping("/predefined-object-session")
public String objectSession(HttpServletRequest request) {
   HttpSession session = request.getSession();
   session.setAttribute("mygreeting", "Hello Everyone!");
   return "predefined-object-session";
}

predefined-object-session.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
   <head>
      <meta charset="UTF-8" />
      <title>Predefined Objects</title>
   </head>
   <body>
       <h1>Predefined Object #session</h1>
       <h3>#session.getAttribute('mygreeting')</h3>
       <span th:utext="${#session.getAttribute('mygreeting')}"></span>  
   </body>
</html>

3- Utility Objects

Object	Class/Interface	Die Bezeichnung
#execInfo	org.thymeleaf.expression.ExecutionInfo	Die Information von Template wird gerade behandelt.
#messages	org.thymeleaf.expression.Messages	Die Methode zur Arbeit mit message.
#uris	org.thymeleaf.expression.Uris	Die Methode zum Austritt (escape) der Teile von URLs/URIs.
#conversions	org.thymeleaf.expression.Conversions	Die Methode zur Implementierung der konfigurierten "Umwandlungsdienstleistung" (conversion service) (wenn ja)
#dates	javax.servlet.http.HttpSession	Die Methode zur Formatierung des Objekt java.util.Date, oder zur Holung der betreffenden Information wie Datum, Monat, Jahr..
#calendars	javax.servlet.http.ServletContext	Wie #dates, aber mit dem Objekt java.util.Calendar.
#numbers	org.thymeleaf.expression.Numbers	Die Methode zur Formatierung des numerischen Objekte (Zahl).
#strings	org.thymeleaf.expression.Strings	Die Methode für die Objekte String. zum Beispiel contains, startsWith, ...
#objects	org.thymeleaf.expression.Objects	Die Methode für die Objekte im allgemeinen.
#bools	org.thymeleaf.expression.Bools	Die Methode für die Bewertung boolean.
#arrays	org.thymeleaf.expression.Arrays	Die Methode für die Array.
#lists	org.thymeleaf.expression.Lists	Die Methode für lists.
#sets	org.thymeleaf.expression.Sets	Die Methode für sets.
#maps	org.thymeleaf.expression.Maps	Die Methode für maps.
#aggregates	org.thymeleaf.expression.Aggregates	Die Methode für die Berechnung der Summe, Durchschnitt,.. auf einer Kollektion oder Array.
#ids	org.thymeleaf.expression.Ids

mehr sehen:

org.thymeleaf.expression.ExecutionInfo

org.thymeleaf.expression.Messages

org.thymeleaf.expression.Uris

org.thymeleaf.expression.Conversions

org.thymeleaf.expression.Dates

org.thymeleaf.expression.Calendars

org.thymeleaf.expression.Numbers

org.thymeleaf.expression.Strings

org.thymeleaf.expression.Objects

org.thymeleaf.expression.Bools

org.thymeleaf.expression.Arrays

org.thymeleaf.expression.Lists

org.thymeleaf.expression.Sets

org.thymeleaf.expression.Maps

org.thymeleaf.expression.Aggregates

org.thymeleaf.expression.Ids

#execInfo

Das Objekt hilft Ihnen bei der Holung der Information über Template , das gerade behandelt wird.


@RequestMapping("/predefined-u-object-execInfo")
public String execInfo_object() {
      return "predefined-u-object-execInfo";
}

predefined-u-object-execInfo.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
   <head>
      <meta charset="UTF-8" />
      <title>Predefined Objects</title>
   </head>
   <body>
       <h1>#execInfo</h1>
       <h3>#execInfo.templateMode</h3>
       <span th:utext="${#execInfo.templateMode}"></span> 
       <h3>#execInfo.templateName</h3>
       <span th:utext="${#execInfo.templateName}"></span>
       <h3>#execInfo.now (java.util.Calendar)</h3>
       <span th:utext="${#execInfo.now}"></span>
   </body>
</html>

#uris

Das Objekt bietet die Methode um die Teile von URLs/URIs zu fluchten (escape).

predefined-u-object-uris.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
   <head>
      <meta charset="UTF-8" />
      <title>Predefined Objects</title>
   </head>
   <body>
       <h1>#uris</h1>
       <h4>#uris.escapePath('https://example.com?user=Tom&gender=Male')</h4>
       <span th:utext="${#uris.escapePath('https://example.com?user=Tom&gender=Male')}"></span>
       <h4>#uris.unescapePath('https://example.com%3Fuser=Tom&gender=Male')</h4>
       <span th:utext="${#uris.unescapePath('https://example.com%3Fuser=Tom&gender=Male')}"></span>  
   </body>
</html>

#dates

Die Methode bieten um das Objekt java.util.Date zu formatieren oder die betreffenden Informationen wie Datum, Monat, Jahr,.. zu holen

predefined-u-object-dates.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#dates</h1>
    <!-- Create a variable 'now' (java.util.Date), it exists in block -->
    <th:block th:with="now = ${#dates.createNow()}">
        <span th:utext="${now}"></span>
        <h4>#dates.format(now, 'yyyy-MM-dd HH:mm:ss')</h4>
        <span th:utext="${#dates.format( now , 'yyyy-MM-dd HH:mm:ss')}">Date String</span>
        <h4>#dates.year(now)</h4>
        <span th:utext="${#dates.year(now)}">Year</span>
        <h4>#dates.month(now)</h4>
        <span th:utext="${#dates.month(now)}">Month</span>
    </th:block>
</body>
</html>

#calendars

Die Methode bieten um das Objekt java.util.Calendar zu formatieren oder die betreffenden Informationen wie Datum, Monat, Jahr,..zu holen.

predefined-u-object-calendars.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#calendars</h1>
    <!-- Create a variable 'now' (java.util.Calendar), it exists in block -->
    <th:block th:with="now = ${#calendars.createNow()}">
        <span th:utext="${now}"></span>
        <h4>#calendars.format(now, 'yyyy-MM-dd HH:mm:ss')</h4>
        <span th:utext="${#dates.format( now , 'yyyy-MM-dd HH:mm:ss')}">Date String</span>
        <h4>#dates.year(now)</h4>
        <span th:utext="${#dates.year(now)}">Year</span>
        <h4>#dates.month(now)</h4>
        <span th:utext="${#dates.month(now)}">Month</span>
    </th:block>
</body>
</html>

#numbers

Die Methode bieten um die nummerischen Objekte zu formatieren (Number).

predefined-u-object-numbers.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#numbers</h1>
    <!-- Create a Number, it exists in block -->
   <th:block th:with="num = 12345.987654">
        <h4>num</h4>
        <span th:utext="${num}">Number</span>
        <h4>${#numbers.formatInteger(num,3)}</h4>
        <span th:utext="${#numbers.formatInteger(num,3)}">Number</span>
        <h4>${#numbers.formatInteger(num,3,'POINT')}</h4>
        <span th:utext="${#numbers.formatInteger(num,3,'POINT')}">Number</span>
        <h4>${#numbers.formatDecimal(num,3,'POINT',2,'COMMA')}</h4>
        <span th:utext="${#numbers.formatDecimal(num,3,'POINT',2,'COMMA')}">Number</span>
    </th:block>
</body>
</html>

#strings

#objects

Die Methode für die Objekte im allgemeinen bieten.


@RequestMapping("/predefined-u-object-objects")
public String objects_object(Model model) {
    // An array store null values.
    String[] colors = new String[] {"red", "blue", null, "green", null, "red"};
    model.addAttribute("colors", colors);
    return "predefined-u-object-objects";
}

predefined-u-object-objects.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#objects</h1>  
    <h4>#objects.arrayNullSafe(colors,'white')</h4>
    <ul>
        <li th:each="color : ${#objects.arrayNullSafe(colors,'white')}"
            th:utext="${color}"></li>
    </ul>
    <h4>And other methods..</h4>
</body>
</html>

#bools

Die Methode für die Bewertung boolean bieten.


@RequestMapping("/predefined-u-object-bools")
public String bools_object(Model model) {
    // An array store null values.
    String[] colors = new String[] {"red", null , "blue"};
    model.addAttribute("colors", colors);
    return "predefined-u-object-bools";
}

predefined-u-object-bools.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#bools</h1>  
    <h4>Array: colors</h4>
    <ul>
        <li th:each="color : ${colors}"
            th:utext="${color}"></li>
    </ul>
    <h4>#bools.arrayIsTrue(colors)</h4>
    <ul>
        <li th:each="color : ${#bools.arrayIsTrue(colors)}"
            th:utext="${color}"></li>
    </ul>
    <h4>#bools.arrayIsFalse(colors)</h4>
    <ul>
        <li th:each="color : ${#bools.arrayIsFalse(colors)}"
            th:utext="${color}"></li>
    </ul>
    <h4>And other methods..</h4>
</body>
</html>

#arrays

Die Methode für die Array bieten.


@RequestMapping("/predefined-u-object-arrays")
public String arrays_object(Model model) {
    String[] colors = new String[] {"red", null , "blue"};
    model.addAttribute("colors", colors);
    return "predefined-u-object-arrays";
}

predefined-u-object-arrays.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#arrays</h1>  
    <h4>Array: colors</h4>
    <ul>
        <li th:each="color : ${colors}"
            th:utext="${color}"></li>
    </ul>
    <h4>#arrays.isEmpty(colors)</h4>
    <span th:utext="${#arrays.isEmpty(colors)}"></span>
    <h4>#arrays.length(colors)</h4>
    <span th:utext="${#arrays.length(colors)}"></span>
    <h4>#arrays.contains(colors,'red')</h4>
    <span th:utext="${#arrays.contains(colors,'red')}"></span>
    <h4>And other methods..</h4>
</body>
</html>

#lists

Die Methode für lists bieten.


@RequestMapping("/predefined-u-object-lists")
public String lists_object(Model model) {
    String[] array = new String[] {"red", "blue", "green"};
    List<String> colors = Arrays.asList(array);
    model.addAttribute("colors", colors);
    return "predefined-u-object-lists";
}

predefined-u-object-lists.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#lists</h1>  
    <h4>List: colors</h4>
    <ul>
        <li th:each="color : ${colors}"
            th:utext="${color}"></li>
    </ul>
    <h4>#lists.sort(colors)</h4>
    <ul>
        <li th:each="color : ${#lists.sort(colors)}"
            th:utext="${color}"></li>
    </ul>
    <h4>#lists.isEmpty(colors)</h4>
    <span th:utext="${#lists.isEmpty(colors)}"></span>
    <h4>#lists.size(colors)</h4>
    <span th:utext="${#lists.size(colors)}"></span>
    <h4>#lists.contains(colors,'red')</h4>
    <span th:utext="${#lists.contains(colors,'red')}"></span>
    <h4>And other methods..</h4>
</body>
</html>

#sets

Die Methode für sets bieten.


@RequestMapping("/predefined-u-object-sets")
public String sets_object(Model model) {
    Set<String> colors = new HashSet<String>();
    colors.add("red");
    colors.add("blue");
    colors.add("green");
    model.addAttribute("colors", colors);
    return "predefined-u-object-sets";
}

predefined-u-object-sets.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#sets</h1>  
    <h4>List: colors</h4>
    <ul>
        <li th:each="color : ${colors}"
            th:utext="${color}"></li>
    </ul>
    <h4>#sets.isEmpty(colors)</h4>
    <span th:utext="${#sets.isEmpty(colors)}"></span>
    <h4>#sets.size(colors)</h4>
    <span th:utext="${#sets.size(colors)}"></span>
    <h4>#sets.contains(colors,'red')</h4>
    <span th:utext="${#sets.contains(colors,'red')}"></span>
    <h4>And other methods..</h4>
</body>
</html>

#maps

Die Methode für maps bieten.


@RequestMapping("/predefined-u-object-maps")
public String maps_object(Model model) {
    Map<String,String> contacts = new HashMap<String,String>();
    contacts.put("111 222","Tom");
    contacts.put("111 333","Jerry");
    contacts.put("111 444","Donald");
    model.addAttribute("contacts", contacts);
    return "predefined-u-object-maps";
}

predefined-u-object-maps.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#maps</h1>  
    <h4>Map: contacts</h4>
    <h4>#maps.isEmpty(contacts)</h4>
    <span th:utext="${#maps.isEmpty(contacts)}"></span>
    <h4>#maps.size(contacts)</h4>
    <span th:utext="${#maps.size(contacts)}"></span>
    <h4>And other methods..</h4>
</body>
</html>

#aggregates

Die Methode zur Berechnung der Summe, Durchschnitt.. in einer Kollektion oder ein Array bieten.

#aggregates


@RequestMapping("/predefined-u-object-aggregates")
public String aggregates_object(Model model) {
    double[] salaries = new double[] {100, 200, 500};
    model.addAttribute("salaries", salaries);
    return "predefined-u-object-aggregates";
}

predefined-u-object-aggregates.html


<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>Predefined Objects</title>
</head>
<body>
    <h1>#aggregates</h1>  
    <h4>Array: salaries</h4>
    <ul>
        <li th:each="salary : ${salaries}"
            th:utext="${salary}"></li>
    </ul>
    <h4>#aggregates.avg(salaries)</h4>
    <span th:utext="${#aggregates.avg(salaries)}"></span>
  
    <h4>#aggregates.sum(salaries)</h4>
    <span th:utext="${#aggregates.sum(salaries)}"></span>
</body>
</html>

#ids

View more Tutorials:

Anleitungen Thymeleaf